2015-08-10 17:50:41 +08:00
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PROJECT = rabbit
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2016-12-06 19:18:02 +08:00
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PROJECT_DESCRIPTION = RabbitMQ
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PROJECT_MOD = rabbit
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PROJECT_REGISTERED = rabbit_amqqueue_sup \
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rabbit_direct_client_sup \
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rabbit_node_monitor \
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rabbit_router
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2009-09-22 21:59:30 +08:00
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2016-12-06 19:18:02 +08:00
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define PROJECT_ENV
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[
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{tcp_listeners, [5672]},
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{num_tcp_acceptors, 10},
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{ssl_listeners, []},
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2017-10-29 21:19:30 +08:00
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{num_ssl_acceptors, 10},
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2016-12-06 19:18:02 +08:00
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{ssl_options, []},
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2024-08-29 18:10:49 +08:00
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{vm_memory_high_watermark, 0.6},
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2017-10-19 05:33:39 +08:00
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{vm_memory_calculation_strategy, rss},
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2016-12-06 19:18:02 +08:00
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{disk_free_limit, 50000000}, %% 50MB
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{backing_queue_module, rabbit_variable_queue},
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%% 0 ("no limit") would make a better default, but that
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%% breaks the QPid Java client
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{frame_max, 131072},
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2018-05-09 23:06:20 +08:00
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%% see rabbitmq-server#1593
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2018-05-10 01:39:19 +08:00
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{channel_max, 2047},
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2024-09-06 16:12:24 +08:00
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{session_max_per_connection, 64},
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{link_max_per_session, 256},
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2023-03-29 08:07:57 +08:00
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{ranch_connection_max, infinity},
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2016-12-06 19:18:02 +08:00
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{heartbeat, 60},
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{msg_store_file_size_limit, 16777216},
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2020-06-04 01:36:17 +08:00
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{msg_store_shutdown_timeout, 600000},
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2016-12-06 19:18:02 +08:00
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{fhc_write_buffering, true},
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{fhc_read_buffering, false},
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{queue_index_max_journal_entries, 32768},
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{queue_index_embed_msgs_below, 4096},
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{default_user, <<"guest">>},
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{default_pass, <<"guest">>},
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{default_user_tags, [administrator]},
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{default_vhost, <<"/">>},
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{default_permissions, [<<".*">>, <<".*">>, <<".*">>]},
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{loopback_users, [<<"guest">>]},
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{password_hashing_module, rabbit_password_hashing_sha256},
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{server_properties, []},
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{collect_statistics, none},
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{collect_statistics_interval, 5000},
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{mnesia_table_loading_retry_timeout, 30000},
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{mnesia_table_loading_retry_limit, 10},
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Add SASL mechanism ANONYMOUS
## 1. Introduce new SASL mechanism ANONYMOUS
### What?
Introduce a new `rabbit_auth_mechanism` implementation for SASL
mechanism ANONYMOUS called `rabbit_auth_mechanism_anonymous`.
### Why?
As described in AMQP section 5.3.3.1, ANONYMOUS should be used when the
client doesn't need to authenticate.
Introducing a new `rabbit_auth_mechanism` consolidates and simplifies how anonymous
logins work across all RabbitMQ protocols that support SASL. This commit
therefore allows AMQP 0.9.1, AMQP 1.0, stream clients to connect out of
the box to RabbitMQ without providing any username or password.
Today's AMQP 0.9.1 and stream protocol client libs hard code RabbitMQ default credentials
`guest:guest` for example done in:
* https://github.com/rabbitmq/rabbitmq-java-client/blob/0215e85643a9ae0800822869be0200024e2ab569/src/main/java/com/rabbitmq/client/ConnectionFactory.java#L58-L61
* https://github.com/rabbitmq/amqp091-go/blob/ddb7a2f0685689063e6d709b8e417dbf9d09469c/uri.go#L31-L32
Hard coding RabbitMQ specific default credentials in dozens of different
client libraries is an anti-pattern in my opinion.
Furthermore, there are various AMQP 1.0 and MQTT client libraries which
we do not control or maintain and which still should work out of the box
when a user is getting started with RabbitMQ (that is without
providing `guest:guest` credentials).
### How?
The old RabbitMQ 3.13 AMQP 1.0 plugin `default_user`
[configuration](https://github.com/rabbitmq/rabbitmq-server/blob/146b4862d8e570b344c99c37d91246760e218b18/deps/rabbitmq_amqp1_0/Makefile#L6)
is replaced with the following two new `rabbit` configurations:
```
{anonymous_login_user, <<"guest">>},
{anonymous_login_pass, <<"guest">>},
```
We call it `anonymous_login_user` because this user will be used for
anonymous logins. The subsequent commit uses the same setting for
anonymous logins in MQTT. Hence, this user is orthogonal to the protocol
used when the client connects.
Setting `anonymous_login_pass` could have been left out.
This commit decides to include it because our documentation has so far
recommended:
> It is highly recommended to pre-configure a new user with a generated username and password or delete the guest user
> or at least change its password to reasonably secure generated value that won't be known to the public.
By having the new module `rabbit_auth_mechanism_anonymous` internally
authenticate with `anonymous_login_pass` instead of blindly allowing
access without any password, we protect operators that relied on the
sentence:
> or at least change its password to reasonably secure generated value that won't be known to the public
To ease the getting started experience, since RabbitMQ already deploys a
guest user with full access to the default virtual host `/`, this commit
also allows SASL mechanism ANONYMOUS in `rabbit` setting `auth_mechanisms`.
In production, operators should disable SASL mechanism ANONYMOUS by
setting `anonymous_login_user` to `none` (or by removing ANONYMOUS from
the `auth_mechanisms` setting. This will be documented separately.
Even if operators forget or don't read the docs, this new ANONYMOUS
mechanism won't do any harm because it relies on the default user name
`guest` and password `guest`, which is recommended against in
production, and who by default can only connect from the local host.
## 2. Require SASL security layer in AMQP 1.0
### What?
An AMQP 1.0 client must use the SASL security layer.
### Why?
This is in line with the mandatory usage of SASL in AMQP 0.9.1 and
RabbitMQ stream protocol.
Since (presumably) any AMQP 1.0 client knows how to authenticate with a
username and password using SASL mechanism PLAIN, any AMQP 1.0 client
also (presumably) implements the trivial SASL mechanism ANONYMOUS.
Skipping SASL is not recommended in production anyway.
By requiring SASL, configuration for operators becomes easier.
Following the principle of least surprise, when an an operator
configures `auth_mechanisms` to exclude `ANONYMOUS`, anonymous logins
will be prohibited in SASL and also by disallowing skipping the SASL
layer.
### How?
This commit implements AMQP 1.0 figure 2.13.
A follow-up commit needs to be pushed to `v3.13.x` which will use SASL
mechanism `anon` instead of `none` in the Erlang AMQP 1.0 client
such that AMQP 1.0 shovels running on 3.13 can connect to 4.0 RabbitMQ nodes.
2024-08-14 18:19:17 +08:00
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%% The identity to act as for anonymous logins.
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{anonymous_login_user, <<"guest">>},
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{anonymous_login_pass, <<"guest">>},
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%% "The server mechanisms are ordered in decreasing level of preference."
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%% AMQP §5.3.3.1
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{auth_mechanisms, ['PLAIN', 'AMQPLAIN', 'ANONYMOUS']},
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2016-12-06 19:18:02 +08:00
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{auth_backends, [rabbit_auth_backend_internal]},
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{delegate_count, 16},
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{trace_vhosts, []},
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{ssl_cert_login_from, distinguished_name},
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{ssl_handshake_timeout, 5000},
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{ssl_allow_poodle_attack, false},
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{handshake_timeout, 10000},
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{reverse_dns_lookups, false},
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{cluster_partition_handling, ignore},
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{cluster_keepalive_interval, 10000},
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2020-01-12 00:23:30 +08:00
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{autoheal_state_transition_timeout, 60000},
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2016-12-06 19:18:02 +08:00
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{tcp_listen_options, [{backlog, 128},
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{nodelay, true},
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{linger, {true, 0}},
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{exit_on_close, false}
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]},
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{ssl_apps, [asn1, crypto, public_key, ssl]},
|
2024-12-04 00:34:32 +08:00
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%% see rabbitmq-server#114
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{classic_queue_flow_control, true},
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2016-12-06 19:18:02 +08:00
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%% see rabbitmq-server#227 and related tickets.
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%% msg_store_credit_disc_bound only takes effect when
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%% messages are persisted to the message store. If messages
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%% are embedded on the queue index, then modifying this
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%% setting has no effect because credit_flow is not used when
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%% writing to the queue index. See the setting
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%% queue_index_embed_msgs_below above.
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2017-02-18 03:31:29 +08:00
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{msg_store_credit_disc_bound, {4000, 800}},
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2017-02-08 16:56:05 +08:00
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%% see rabbitmq-server#143,
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%% rabbitmq-server#949, rabbitmq-server#1098
|
2017-02-05 19:41:40 +08:00
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{credit_flow_default_credit, {400, 200}},
|
2020-05-01 18:43:42 +08:00
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|
|
{quorum_commands_soft_limit, 32},
|
2021-01-28 17:46:28 +08:00
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{quorum_cluster_size, 3},
|
2016-12-06 19:18:02 +08:00
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%% see rabbitmq-server#248
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%% and rabbitmq-server#667
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{channel_operation_timeout, 15000},
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2024-09-23 17:34:54 +08:00
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%% See https://www.rabbitmq.com/docs/consumers#acknowledgement-timeout
|
2021-05-12 01:25:29 +08:00
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%% 30 minutes
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{consumer_timeout, 1800000},
|
2016-12-07 22:21:58 +08:00
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%% used by rabbit_peer_discovery_classic_config
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{cluster_nodes, {[], disc}},
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2019-04-19 22:06:07 +08:00
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{config_entry_decoder, [{passphrase, undefined}]},
|
2017-02-05 19:41:40 +08:00
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{background_gc_enabled, false},
|
2017-02-07 18:25:20 +08:00
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{background_gc_target_interval, 60000},
|
2017-07-01 11:39:03 +08:00
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%% rabbitmq-server#589
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2017-05-08 19:58:01 +08:00
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{proxy_protocol, false},
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2017-04-12 18:28:25 +08:00
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|
|
{disk_monitor_failure_retries, 10},
|
2017-05-08 23:01:10 +08:00
|
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{disk_monitor_failure_retry_interval, 120000},
|
2017-07-01 11:39:03 +08:00
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%% either "stop_node" or "continue".
|
2017-07-06 20:20:18 +08:00
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%% by default we choose to not terminate the entire node if one
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%% vhost had to shut down, see server#1158 and server#1280
|
2017-10-27 17:30:29 +08:00
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{vhost_restart_strategy, continue},
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2017-10-28 06:41:30 +08:00
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|
%% {global, prefetch count}
|
Quorum queues (#1706)
* Test queue.declare method with quorum type
[#154472130]
* Cosmetics
[#154472130]
* Start quorum queue
Includes ra as a rabbit dependency
[#154472152]
* Update info and list operations to use quorum queues
Basic implementation. Might need an update when more functionality
is added to the quorum queues.
[#154472152]
* Stop quorum queue
[#154472158]
* Restart quorum queue
[#154472164]
* Introduce UId in ra config to support newer version of ra
Improved ra stop
[#154472158]
* Put data inside VHost specific subdirs
[#154472164]
* Include ra in rabbit deps to support stop_app/start_app command
[#154472164]
* Stop quorum queues in `rabbit_amqqueue:stop/1`
[#154472158]
* Revert creation of fifo ets table inside rabbit
Now supported by ra
[#154472158]
* Filter quorum queues
[#154472158]
* Test restart node with quorum queues
[#154472164]
* Publish to quorum queues
[#154472174]
* Use `ra:restart_node/1`
[#154472164]
* Wait for stats to be published when querying quorum queues
[#154472174]
* Test publish and queue length after restart
[#154472174]
* Consume messages from quorum queues with basic.get
[#154472211]
* Autoack messages from quorum queues on basic.get
[#154472211]
* Fix no_ack meaning
no_ack = true is equivalent to autoack
[#154472211]
* Use data_dir as provided in the config
If we modify the data_dir, ra is not able to delete the data
when a queue is deleted
[#154472158]
* Remove unused code/variables
[#154472158]
* Subscribe to a quorum queue
Supports auto-ack
[#154472215]
* Ack messages consumed from quorum queues
[#154472221]
* Nack messages consumed from quorum queues
[#154804608]
* Use delivery tag as consumer tag for basic.get in quorum queues
[#154472221]
* Support for publisher confirms in quorum queues
[#154472198]
* Integrate with ra_fifo_client
* Clear queue state on queue.delete
[#154472158]
* Fix quorum nack
[#154804608]
* Test redelivery after nack
[#154804608]
* Nack without requeueing
[#154472225]
* Test multiple acks
[#154804208]
* Test multiple nacks
[#154804314]
* Configure dead letter exchange with queue declare
[#155076661]
* Use a per-vhost process to handle dead-lettering
Needs to hold state for quorum queues
[#155401802]
* Implement dead-lettering on nack'ed messages
[#154804620]
* Use queue name as a resource on message delivery
Fixes a previously introduced bug
[#154804608]
* Handle ra events on dead letter process
[#155401802]
* Pass empty queue states to queue delete
Queue deletion on vhost deletion calls directly to rabbit_amqqueue.
Queue states are not available, but we can provide an empty map as
in deletion the states are only needed for cleanup.
* Generate quorum queue stats and events
Consumer delete events are still pending, as depend on basic.cancel
(not implemented yet), ra terminating or ra detecting channel down
[#154472241]
* Ensure quorum mapping entries are available before metric emission
[#154472241]
* Configure data_dir, uses new RABBITMQ_QUORUM_BASE env var
[#154472152]
* Use untracked enqueues when sending wihtout channel
Updated several other calls missed during the quorum implementation
* Revert "Configure data_dir, uses new RABBITMQ_QUORUM_BASE env var"
This reverts commit f2261212410affecb238fcbd1fb451381aee4036.
* Configure data_dir, uses new RABBITMQ_QUORUM_DIR based on mnesia dir
[#154472152]
* Fix get_quorum_state
* Fix calculation of quorum pids
* Move all quorum queues code to its own module
[#154472241]
* Return an error when declaring a quorum queue with an incompatible argument
[#154521696]
* Cleanup of quorum queue state after queue delete
Also fixes some existing problems where the state wasn't properly
stored
[#155458625]
* Revert Revert "Declare a quorum queue using the queue.declare method"
* Remove duplicated state info
[#154472241]
* Start/stop multi-node quorum queue
[#154472231]
[#154472236]
* Restart nodes in a multi-node quorum cluster
[#154472238]
* Test restart and leadership takeover on multiple nodes
[#154472238]
* Wait for leader down after deleting a quorum cluster
It ensures an smooth delete-declare sequence without race
conditions. The test included here detected the situation before
the fix.
[#154472236]
* Populate quorum_mapping from mnesia when not available
Ensures that leader nodes that don't have direct requests can get
the mapping ra name -> queue name
* Cosmetics
* Do not emit core metrics if queue has just been deleted
* Use rabbit_mnesia:is_process_alive
Fixes bug introduced by cac9583e1bb2705be7f06c2ab7f416a75d11c875
[#154472231]
* Only try to report stats if quorum process is alive
* Implement cancel consumer callback
Deletes metrics and sends consumer deleted event
* Remove unnecessary trigger election call
ra:restart_node has already been called during the recovery
* Apply cancellation callback on node hosting the channel
* Cosmetics
* Read new fifo metrics which store directly total, ready and unack
* Implement basic.cancel for quorum queues
* Store leader in amqqueue record, report all in stats
[#154472407]
* Declare quorum queue in mnesia before starting the ra cluster
Record needs to be stored first to update the leader on ra effects
* Revert
* Purge quorum queues
[#154472182]
* Improve use of untracked_enqueue
Choose the persisted leader id instead of just using the id of the
leader at point of creation.
* Store quorum leader in the pid field of amqqueue record
Same as mirrored queues, no real need for an additional field
* Improve recovery
When a ra node has never been started on a rabbit node ensure it doesn't
fail but instead rebuilds the config and starts the node as a new node.
Also fix issue when a quorum queue is declared when one of it's rabbit
nodes are unavailable.
[#157054606]
* Cleanup core metrics after leader change
[#157054473]
* Return an error on sync_queue on quorum queues
[#154472334]
* Return an error on cancel_sync_queue on quorum queues
[#154472337]
* Fix basic_cancel and basic_consume return values
Ensure the quorum queue state is always returned by these functions.
* Restore arity of amqqeueu delete and purge functions.
This avoids some breaking changes in the cli.
* Fix bug returning consumers.
* remove rogue debug log
* Integrate ingress flow control with quorum queues
[#157000583]
* Configure commands soft limit
[#157000583]
* Support quorum pids on rabbit_mnesia:is_process_alive
* Publish consumers metric for quorum queues
* Whitelist quorum directory in is_virgin_node
Allow the quorum directoy to exist without affecting the status of the
Rabbit node.
* Delete queue_metrics on leader change.
Also run the become_leader handler in a separate process to avoid
blocking.
[#157424225]
* Report cluster status in quorum queue infos. New per node status command.
Related to
[#157146500]
* Remove quorum_mapping table
As we can store the full queue name resource as the cluster id of the
ra_fifo_client state we can avoid needed the quorum_mapping table.
* Fix xref issue
* Provide quorum members information in stats
[#157146500]
* fix unused variable
* quorum queue multiple declare handling
Extend rabbit_amqqueue:internal_declare/2 to indicate if the queue
record was created or exisiting. From this we can then provide a code
path that should handle concurrent queue declares of the same quorum
queue.
* Return an error when declaring exclusive/auto-delete quorum queue
[#157472160]
* Restore lost changes
from 79c9bd201e1eac006a42bd162e7c86df96496629
* recover another part of commit
* fixup cherry pick
* Ra io/file metrics handler and stats publishing
[#157193081]
* Revert "Ra io/file metrics handler and stats publishing"
This reverts commit 05d15c786540322583fc655709825db215b70952.
* Do not issue confirms on node down for quorum queues.
Only a ra_event should be used to issue positive confirms for a quorum
queue.
* Ra stats publishing
[#157193081]
* Pick consumer utilisation from ra data
[#155402726]
* Handle error when deleting a quorum queue and all nodes are already down
This is in fact a successful deletion as all raft nodes are already 'stopped'
[#158656366]
* Return an error when declaring non-durable quorum queues
[#158656454]
* Rename dirty_query to committed_query
* Delete stats on leader node
[#158661152]
* Give full list of nodes to fifo client
* Handle timeout in quorum basic_get
* Fix unused variable error
* Handle timeout in basic get
[#158656366]
* Force GC after purge
[#158789389]
* Increase `ra:delete_cluster` timeout to 120s
* Revert "Force GC after purge"
This reverts commit 5c98bf22994eb39004760799d3a2c5041d16e9d4.
* Add quorum member command
[#157481599]
* Delete quorum member command
[#157481599]
* Implement basic.recover for quorum queues
[#157597411]
* Change concumer utilisation
to use the new ra_fifo table and api.
* Set max quorum queue size limit
Defaults to 7, can be configured per queue on queue.declare
Nodes are selected randomly from the list of nodes, but the one
that is executing the queue.declare command
[#159338081]
* remove potentially unrelated changes to rabbit_networking
* Move ra_fifo to rabbit
Copied ra_fifo to rabbit and renamed it rabbit_fifo.
[#159338031]
* rabbit_fifo tidy up
* rabbit_fifo tidy up
* rabbit_fifo: customer -> consumer rename
* Move ra_fifo tests
[#159338031]
* Tweak quorum_queue defaults
* quorum_queue test reliability
* Optimise quorum_queue test suite.
By only starting a rabbit cluster per group rather than test.
[#160612638]
* Renamings in line with ra API changes
* rabbit_fifo fixes
* Update with ra API changes
Ra has consolidated and simplified it's api. These changes update to
confirm to that.
* Update rabbit_fifo with latest ra changes
* Clean up out of date comment
* Return map of states
* Add test case for basic.get on an empty queue
Before the previous patch, any subsequent basic.get would crash as
the map of states had been replaced by a single state.
* Clarify use of deliver tags on record_sent
* Clean up queues after testcase
* Remove erlang monitor of quorum queues in rabbit_channel
The eol event can be used instead
* Use macros to make clearer distinctions between quorum/classic queues
Cosmetic only
* Erase queue stats on 'eol' event
* Update to follow Ra's cluster_id -> cluster_name rename.
* Rename qourum-cluster-size
To quorum-initial-group-size
* Issue confirms on quorum queue eol
Also avoid creating quorum queue session state on queue operation
methods.
* Only classic queues should be notified on channel down
* Quorum queues do not support global qos
Exit with protocol error of a basic.consume for a quorum queue is issued
on a channel with global qos enabled.
* unused variable name
* Refactoring
Strictly enfornce that channels do not monitor quorum queues.
* Refactor foreach_per_queue in the channel.
To make it call classic and quorum queues the same way.
[#161314899]
* rename function
* Query classic and quorum queues separately
during recovery as they should not be marked as stopped during failed
vhost recovery.
* Remove force_event_refresh function
As the only user of this function, the management API no longer requires
it.
* fix errors
* Remove created_at from amqqueue record
[#161343680]
* rabbit_fifo: support AMQP 1.0 consumer credit
This change implements an alternative consumer credit mechanism similar
to AMQP 1.0 link credit where the credit (prefetch) isn't automatically
topped up as deliveries are settled and instead needs to be manually
increased using a credit command. This is to be integrated with the AMQP
1.0 plugin.
[#161256187]
* Add basic.credit support for quorum queues.
Added support for AMQP 1.0 transfer flow control.
[#161256187]
* Make quorum queue recover idempotent
So that if a vhost crashes and runs the recover steps it doesn't fail
because ra servers are still running.
[#161343651]
* Add tests for vhost deletion
To ensure quorum queues are cleaned up on vhost removal.
Also fix xref issue.
[#161343673]
* remove unused clause
* always return latest value of queue
* Add rabbitmq-queues scripts. Remove ra config from .bat scripts.
* Return error if trying to get quorum status of a classic queue.
2018-10-29 17:47:29 +08:00
|
|
|
{default_consumer_prefetch, {false, 0}},
|
2022-08-28 01:49:35 +08:00
|
|
|
%% interval at which the channel can perform periodic actions
|
2019-04-08 23:12:26 +08:00
|
|
|
{channel_tick_interval, 60000},
|
2024-06-14 15:18:46 +08:00
|
|
|
%% Default max message size is 16 MB
|
|
|
|
{max_message_size, 16777216},
|
2019-12-20 13:02:51 +08:00
|
|
|
%% Socket writer will run GC every 1 GB of outgoing data
|
2020-06-10 17:10:48 +08:00
|
|
|
{writer_gc_threshold, 1000000000},
|
|
|
|
%% interval at which connection/channel tracking executes post operations
|
2020-09-29 18:43:24 +08:00
|
|
|
{tracking_execution_timeout, 15000},
|
2020-08-26 22:42:40 +08:00
|
|
|
{stream_messages_soft_limit, 256},
|
2024-05-24 01:42:51 +08:00
|
|
|
{track_auth_attempt_source, false},
|
|
|
|
{credentials_obfuscation_fallback_secret, <<"nocookie">>},
|
|
|
|
{dead_letter_worker_consumer_prefetch, 32},
|
|
|
|
{dead_letter_worker_publisher_confirm_timeout, 180000},
|
2024-06-07 02:47:56 +08:00
|
|
|
{vhost_process_reconciliation_run_interval, 30},
|
2025-09-09 16:02:34 +08:00
|
|
|
{stream_read_ahead, true},
|
2024-06-07 02:47:56 +08:00
|
|
|
%% for testing
|
2024-10-02 08:23:38 +08:00
|
|
|
{vhost_process_reconciliation_enabled, true},
|
|
|
|
{license_line, "Licensed under the MPL 2.0. Website: https://rabbitmq.com"}
|
2016-12-06 19:18:02 +08:00
|
|
|
]
|
|
|
|
endef
|
|
|
|
|
2023-12-08 20:00:46 +08:00
|
|
|
LOCAL_DEPS = sasl os_mon inets compiler public_key crypto ssl syntax_tools xmerl
|
2021-01-14 01:12:14 +08:00
|
|
|
|
2024-06-26 15:56:46 +08:00
|
|
|
BUILD_DEPS = rabbitmq_cli
|
2025-02-18 22:35:40 +08:00
|
|
|
DEPS = ranch cowlib rabbit_common amqp10_common rabbitmq_prelaunch ra sysmon_handler stdout_formatter recon redbug observer_cli osiris syslog systemd seshat horus khepri khepri_mnesia_migration cuttlefish gen_batch_server
|
Enable AMQP 1.0 clients to manage topologies
## What?
* Allow AMQP 1.0 clients to dynamically create and delete RabbitMQ
topologies (exchanges, queues, bindings).
* Provide an Erlang AMQP 1.0 client that manages topologies.
## Why?
Today, RabbitMQ topologies can be created via:
* [Management HTTP API](https://www.rabbitmq.com/docs/management#http-api)
(including Management UI and
[messaging-topology-operator](https://github.com/rabbitmq/messaging-topology-operator))
* [Definition Import](https://www.rabbitmq.com/docs/definitions#import)
* AMQP 0.9.1 clients
Up to RabbitMQ 3.13 the RabbitMQ AMQP 1.0 plugin auto creates queues
and bindings depending on the terminus [address
format](https://github.com/rabbitmq/rabbitmq-server/tree/v3.13.x/deps/rabbitmq_amqp1_0#routing-and-addressing).
Such implicit creation of topologies is limiting and obscure.
For some address formats, queues will be created, but not deleted.
Some of RabbitMQ's success is due to its flexible routing topologies
that AMQP 0.9.1 clients can create and delete dynamically.
This commit allows dynamic management of topologies for AMQP 1.0 clients.
This commit builds on top of Native AMQP 1.0 (PR #9022) and will be
available in RabbitMQ 4.0.
## How?
This commits adds the following management operations for AMQP 1.0 clients:
* declare queue
* delete queue
* purge queue
* bind queue to exchange
* unbind queue from exchange
* declare exchange
* delete exchange
* bind exchange to exchange
* unbind exchange from exchange
Hence, at least the AMQP 0.9.1 management operations are supported for
AMQP 1.0 clients.
In addition the operation
* get queue
is provided which - similar to `declare queue` - returns queue
information including the current leader and replicas.
This allows clients to publish or consume locally on the node that hosts
the queue.
Compared to AMQP 0.9.1 whose commands and command fields are fixed, the
new AMQP Management API is extensible: New operations and new fields can
easily be added in the future.
There are different design options how management operations could be
supported for AMQP 1.0 clients:
1. Use a special exchange type as done in https://github.com/rabbitmq/rabbitmq-management-exchange
This has the advantage that any protocol client (e.g. also STOMP clients) could
dynamically manage topologies. However, a special exchange type is the wrong abstraction.
2. Clients could send "special" messages with special headers that the broker interprets.
This commit decided for a variation of the 2nd option using a more
standardized way by re-using a subest of the following latest AMQP 1.0 extension
specifications:
* [AMQP Request-Response Messaging with Link Pairing Version 1.0 - Committee Specification 01](https://docs.oasis-open.org/amqp/linkpair/v1.0/cs01/linkpair-v1.0-cs01.html) (February 2021)
* [HTTP Semantics and Content over AMQP Version 1.0 - Working Draft 06](https://groups.oasis-open.org/higherlogic/ws/public/document?document_id=65571) (July 2019)
* [AMQP Management Version 1.0 - Working Draft 16](https://groups.oasis-open.org/higherlogic/ws/public/document?document_id=65575) (July 2019)
An important goal is to keep the interaction between AMQP 1.0 client and RabbitMQ
simple to increase usage, development and adoptability of future RabbitMQ AMQP 1.0
client library wrappers.
The AMQP 1.0 client has to create a link pair to the special `/management` node.
This allows the client to send and receive from the management node.
Similar to AMQP 0.9.1, there is no need for a reply queue since the reply
will be sent directly to the client.
Requests and responses are modelled via HTTP, but sent via AMQP using
the `HTTP Semantics and Content over AMQP` extension (henceforth `HTTP
over AMQP` extension).
This commit tries to follow the `HTTP over AMQP` extension as much as
possible but deviates where this draft spec doesn't make sense.
The projected mode §4.1 is used as opposed to tunneled mode §4.2.
A named relay `/management` is used (§6.3) where the message field `to` is the URL.
Deviations are
* §3.1 mandates that URIs are not encoded in an AMQP message.
However, we percent encode URIs in the AMQP message. Otherwise there
is for example no way to distinguish a `/` in a queue name from the
URI path separator `/`.
* §4.1.4 mandates a data section. This commit uses an amqp-value section
as it's a better fit given that the content is AMQP encoded data.
Using an HTTP API allows for a common well understood interface and future extensibility.
Instead of re-using the current RabbitMQ HTTP API, this commit uses a
new HTTP API (let's call it v2) which could be used as a future API for
plain HTTP clients.
### HTTP API v1
The current HTTP API (let's call it v1) is **not** used since v1
comes with a couple of weaknesses:
1. Deep level of nesting becomes confusing and difficult to manage.
Examples of deep nesting in v1:
```
/api/bindings/vhost/e/source/e/destination/props
/api/bindings/vhost/e/exchange/q/queue/props
```
2. Redundant endpoints returning the same resources
v1 has 9 endpoints to list binding(s):
```
/api/exchanges/vhost/name/bindings/source
/api/exchanges/vhost/name/bindings/destination
/api/queues/vhost/name/bindings
/api/bindings
/api/bindings/vhost
/api/bindings/vhost/e/exchange/q/queue
/api/bindings/vhost/e/exchange/q/queue/props
/api/bindings/vhost/e/source/e/destination
/api/bindings/vhost/e/source/e/destination/props
```
3. Verbs in path names
Path names should be nouns instead.
v1 contains verbs:
```
/api/queues/vhost/name/get
/api/exchanges/vhost/name/publish
```
### AMQP Management extension
Only few aspects of the AMQP Management extension are used.
The central idea of the AMQP management spec is **dynamic discovery** such that broker independent AMQP 1.0
clients can discover objects, types, operations, and HTTP endpoints of specific brokers.
In fact, clients are only conformant if:
> All request addresses are dynamically discovered starting from the discovery document.
> A requesting container MUST NOT use fixed assumptions about the addressing structure of the management API.
While this is a nice and powerful idea, no AMQP 1.0 client and no AMQP 1.0 server implement the
latest AMQP 1.0 management spec from 2019, partly presumably due to its complexity.
Therefore, the idea of such dynamic discovery has failed to be implemented in practice.
The AMQP management spec mandates that the management endpoint returns a discovery document containing
broker specific collections, types, configuration, and operations including their endpoints.
The API endpoints of the AMQP management spec are therefore all designed around dynamic discovery.
For example, to create either a queue or an exchange, the client has to
```
POST /$management/entities
```
which shows that the entities collection acts as a generic factory, see section 2.2.
The server will then create the resource and reply with a location header containing a URI pointing to the resource.
For RabbitMQ, we don’t need such a generic factory to create queues or exchanges.
To list bindings for a queue Q1, the spec suggests
```
GET /$management/Queues/Q1/$management/entities
```
which again shows the generic entities endpoint as well as a `$management` endpoint under Q1 to
allow a queue to return a discovery document.
For RabbitMQ, we don’t need such generic endpoints and discovery documents.
Given we aim for our own thin RabbitMQ AMQP 1.0 client wrapper libraries which expose
the RabbitMQ model to the developer, we can directly use fixed HTTP endpoint assumptions
in our RabbitMQ specific libraries.
This is by far simpler than using the dynamic endpoints of the management spec.
Simplicity leads to higher adoption and enables more developers to write RabbitMQ AMQP 1.0 client
library wrappers.
The AMQP Management extension also suffers from deep level of nesting in paths
Examples:
```
/$management/Queues/Q1/$management/entities
/$management/Queues/Q1/Bindings/Binding1
```
as well as verbs in path names: Section 7.1.4 suggests using verbs in path names,
for example “purge”, due to the dynamic operations discovery document.
### HTTP API v2
This commit introduces a new HTTP API v2 following best practices.
It could serve as a future API for plain HTTP clients.
This commit and RabbitMQ 4.0 will only implement a minimal set of
HTTP API v2 endpoints and only for HTTP over AMQP.
In other words, the existing HTTP API v1 Cowboy handlers will continue to be
used for all plain HTTP requests in RabbitMQ 4.0 and will remain untouched for RabbitMQ 4.0.
Over time, after 4.0 shipped, we could ship a pure HTTP API implementation for HTTP API v2.
Hence, the new HTTP API v2 endpoints for HTTP over AMQP should be designed such that they
can be re-used in the future for a pure HTTP implementation.
The minimal set of endpoints for RabbitMQ 4.0 are:
``
GET / PUT / DELETE
/vhosts/:vhost/queues/:queue
```
read, create, delete a queue
```
DELETE
/vhosts/:vhost/queues/:queue/messages
```
purges a queue
```
GET / DELETE
/vhosts/:vhost/bindings/:binding
```
read, delete bindings
where `:binding` is a binding ID of the following path segment:
```
src=e1;dstq=q2;key=my-key;args=
```
Binding arguments `args` has an empty value by default, i.e. there are no binding arguments.
If the binding includes binding arguments, `args` will be an Erlang portable term hash
provided by the server similar to what’s provided in HTTP API v1 today.
Alternatively, we could use an arguments scheme of:
```
args=k1,utf8,v1&k2,uint,3
```
However, such a scheme leads to long URIs when there are many binding arguments.
Note that it’s perfectly fine for URI producing applications to include URI
reserved characters `=` / `;` / `,` / `$` in a path segment.
To create a binding, the client therefore needs to POST to a bindings factory URI:
```
POST
/vhosts/:vhost/bindings
```
To list all bindings between a source exchange e1 and destination exchange e2 with binding key k1:
```
GET
/vhosts/:vhost/bindings?src=e1&dste=e2&key=k1
```
This endpoint will be called by the RabbitMQ AMQP 1.0 client library to unbind a
binding with non-empty binding arguments to get the binding ID before invoking a
```
DELETE
/vhosts/:vhost/bindings/:binding
```
In future, after RabbitMQ 4.0 shipped, new API endpoints could be added.
The following is up for discussion and is only meant to show the clean and simple design of HTTP API v2.
Bindings endpoint can be queried as follows:
to list all bindings for a given source exchange e1:
```
GET
/vhosts/:vhost/bindings?src=e1
```
to list all bindings for a given destination queue q1:
```
GET
/vhosts/:vhost/bindings?dstq=q1
```
to list all bindings between a source exchange e1 and destination queue q1:
```
GET
/vhosts/:vhost/bindings?src=e1&dstq=q1
```
multiple bindings between source exchange e1 and destination queue q1 could be deleted at once as follows:
```
DELETE /vhosts/:vhost/bindings?src=e1&dstq=q1
```
GET could be supported globally across all vhosts:
```
/exchanges
/queues
/bindings
```
Publish a message:
```
POST
/vhosts/:vhost/queues/:queue/messages
```
Consume or peek a message (depending on query parameters):
```
GET
/vhosts/:vhost/queues/:queue/messages
```
Note that the AMQP 1.0 client omits the `/vhost/:vhost` path prefix.
Since an AMQP connection belongs to a single vhost, there is no need to
additionally include the vhost in every HTTP request.
Pros of HTTP API v2:
1. Low level of nesting
Queues, exchanges, bindings are top level entities directly under vhosts.
Although the HTTP API doesn’t have to reflect how resources are stored in the database,
v2 does nicely reflect the Khepri tree structure.
2. Nouns instead of verbs
HTTP API v2 is very simple to read and understand as shown by
```
POST /vhosts/:vhost/queues/:queue/messages to post messages, i.e. publish to a queue.
GET /vhosts/:vhost/queues/:queue/messages to get messages, i.e. consume or peek from a queue.
DELETE /vhosts/:vhost/queues/:queue/messages to delete messages, i.e. purge a queue.
```
A separate new HTTP API v2 allows us to ship only handlers for HTTP over AMQP for RabbitMQ 4.0
and therefore move faster while still keeping the option on the table to re-use the new v2 API
for pure HTTP in the future.
In contrast, re-using the HTTP API v1 for HTTP over AMQP is possible, but dirty because separate handlers
(HTTP over AMQP and pure HTTP) replying differently will be needed for the same v1 endpoints.
2024-02-08 01:26:13 +08:00
|
|
|
TEST_DEPS = rabbitmq_ct_helpers rabbitmq_ct_client_helpers meck proper amqp_client rabbitmq_amqp_client rabbitmq_amqp1_0
|
Use Lager to log RabbitMQ messages
By default, RabbitMQ now logs messages to a single file
($RABBITMQ_LOGS). The $RABBITMQ_SASL_LOGS variable is unused. To
configure how and which messages are logged, it's recommended to do it
from rabbitmq.config, not from the environment variable.
The old `log_levels` parameter is unsupported and categories are
replaced by Lager extra sinks. If you had in your rabbitmq.config:
{rabbit, [
{log_levels, [{connection, info}]}
]}
You can now configure Lager like this:
{lager, [
{extra_sinks, [
{rabbit_connection_lager_event, [
{handlers, [{lager_forwarder_backend, [lager_event, info]}]}
]}
]}
]}
rabbitmq-build.mk from rabbitmq-common is included in the top-level
Makefile. It sets the appropriate compiler options to enable Lager's
lager_transform parse_transform module.
rabbit_log calls are now converted by this parse_transform to direct
calls to lager:log(). To keep backward compatibility with other plugins,
the rabbit_log module still implements all the <level>() functions.
Compared to the parse_transformed calls, the main difference is the
logged message does not carry the file:line metadata.
Fixes #94.
2015-12-05 01:07:00 +08:00
|
|
|
|
2024-11-27 20:33:22 +08:00
|
|
|
# We pin a version of Horus even if we don't use it directly (it is a
|
|
|
|
# dependency of Khepri). But currently, we can't update Khepri while still
|
|
|
|
# needing the fix in Horus 0.3.1. This line and the mention of `horus` above
|
|
|
|
# should be removed with the next update of Khepri.
|
|
|
|
dep_horus = hex 0.3.1
|
|
|
|
|
2024-06-26 15:56:46 +08:00
|
|
|
PLT_APPS += mnesia runtime_tools
|
2020-11-02 18:40:24 +08:00
|
|
|
|
Switch from Lager to the new Erlang Logger API for logging
The configuration remains the same for the end-user. The only exception
is the log root directory: it is now set through the `log_root`
application env. variable in `rabbit`. People using the Cuttlefish-based
configuration file are not affected by this exception.
The main change is how the logging facility is configured. It now
happens in `rabbit_prelaunch_logging`. The `rabbit_lager` module is
removed.
The supported outputs remain the same: the console, text files, the
`amq.rabbitmq.log` exchange and syslog.
The message text format slightly changed: the timestamp is more precise
(now to the microsecond) and the level can be abbreviated to always be
4-character long to align all messages and improve readability. Here is
an example:
2021-03-03 10:22:30.377392+01:00 [dbug] <0.229.0> == Prelaunch DONE ==
2021-03-03 10:22:30.377860+01:00 [info] <0.229.0>
2021-03-03 10:22:30.377860+01:00 [info] <0.229.0> Starting RabbitMQ 3.8.10+115.g071f3fb on Erlang 23.2.5
2021-03-03 10:22:30.377860+01:00 [info] <0.229.0> Licensed under the MPL 2.0. Website: https://rabbitmq.com
The example above also shows that multiline messages are supported and
each line is prepended with the same prefix (the timestamp, the level
and the Erlang process PID).
JSON is also supported as a message format and now for any outputs.
Indeed, it is possible to use it with e.g. syslog or the exchange. Here
is an example of a JSON-formatted message sent to syslog:
Mar 3 11:23:06 localhost rabbitmq-server[27908] <0.229.0> - {"time":"2021-03-03T11:23:06.998466+01:00","level":"notice","msg":"Logging: configured log handlers are now ACTIVE","meta":{"domain":"rabbitmq.prelaunch","file":"src/rabbit_prelaunch_logging.erl","gl":"<0.228.0>","line":311,"mfa":["rabbit_prelaunch_logging","configure_logger",1],"pid":"<0.229.0>"}}
For quick testing, the values accepted by the `$RABBITMQ_LOGS`
environment variables were extended:
* `-` still means stdout
* `-stderr` means stderr
* `syslog:` means syslog on localhost
* `exchange:` means logging to `amq.rabbitmq.log`
`$RABBITMQ_LOG` was also extended. It now accepts a `+json` modifier (in
addition to the existing `+color` one). With that modifier, messages are
formatted as JSON intead of plain text.
The `rabbitmqctl rotate_logs` command is deprecated. The reason is
Logger does not expose a function to force log rotation. However, it
will detect when a file was rotated by an external tool.
From a developer point of view, the old `rabbit_log*` API remains
supported, though it is now deprecated. It is implemented as regular
modules: there is no `parse_transform` involved anymore.
In the code, it is recommended to use the new Logger macros. For
instance, `?LOG_INFO(Format, Args)`. If possible, messages should be
augmented with some metadata. For instance (note the map after the
message):
?LOG_NOTICE("Logging: switching to configured handler(s); following "
"messages may not be visible in this log output",
#{domain => ?RMQLOG_DOMAIN_PRELAUNCH}),
Domains in Erlang Logger parlance are the way to categorize messages.
Some predefined domains, matching previous categories, are currently
defined in `rabbit_common/include/logging.hrl` or headers in the
relevant plugins for plugin-specific categories.
At this point, very few messages have been converted from the old
`rabbit_log*` API to the new macros. It can be done gradually when
working on a particular module or logging.
The Erlang builtin console/file handler, `logger_std_h`, has been forked
because it lacks date-based file rotation. The configuration of
date-based rotation is identical to Lager. Once the dust has settled for
this feature, the goal is to submit it upstream for inclusion in Erlang.
The forked module is calld `rabbit_logger_std_h` and is based
`logger_std_h` in Erlang 23.0.
2021-01-13 00:55:27 +08:00
|
|
|
dep_syslog = git https://github.com/schlagert/syslog 4.0.0
|
2023-09-07 00:09:12 +08:00
|
|
|
|
2015-08-25 22:53:21 +08:00
|
|
|
define usage_xml_to_erl
|
|
|
|
$(subst __,_,$(patsubst $(DOCS_DIR)/rabbitmq%.1.xml, src/rabbit_%_usage.erl, $(subst -,_,$(1))))
|
|
|
|
endef
|
|
|
|
|
|
|
|
DOCS_DIR = docs
|
2017-04-25 16:50:00 +08:00
|
|
|
MANPAGES = $(wildcard $(DOCS_DIR)/*.[0-9])
|
|
|
|
WEB_MANPAGES = $(patsubst %,%.html,$(MANPAGES))
|
2023-12-18 19:16:04 +08:00
|
|
|
MD_MANPAGES = $(patsubst %,%.md,$(MANPAGES))
|
2016-11-07 20:03:18 +08:00
|
|
|
|
2025-05-26 00:59:40 +08:00
|
|
|
CT_HOOKS = rabbit_ct_hook
|
2024-07-25 18:15:50 +08:00
|
|
|
DEP_EARLY_PLUGINS = rabbit_common/mk/rabbitmq-early-plugin.mk
|
2024-07-25 20:15:31 +08:00
|
|
|
DEP_PLUGINS = rabbit_common/mk/rabbitmq-plugin.mk
|
2015-08-26 00:34:52 +08:00
|
|
|
|
2021-03-22 17:38:17 +08:00
|
|
|
include ../../rabbitmq-components.mk
|
|
|
|
include ../../erlang.mk
|
2010-06-09 19:41:46 +08:00
|
|
|
|
2017-08-23 01:18:05 +08:00
|
|
|
ifeq ($(strip $(BATS)),)
|
|
|
|
BATS := $(ERLANG_MK_TMP)/bats/bin/bats
|
|
|
|
endif
|
|
|
|
|
|
|
|
BATS_GIT ?= https://github.com/sstephenson/bats
|
|
|
|
BATS_COMMIT ?= v0.4.0
|
|
|
|
|
|
|
|
$(BATS):
|
|
|
|
$(verbose) mkdir -p $(ERLANG_MK_TMP)
|
|
|
|
$(gen_verbose) git clone --depth 1 --branch=$(BATS_COMMIT) $(BATS_GIT) $(ERLANG_MK_TMP)/bats
|
|
|
|
|
|
|
|
.PHONY: bats
|
|
|
|
|
|
|
|
bats: $(BATS)
|
|
|
|
$(verbose) $(BATS) $(TEST_DIR)
|
|
|
|
|
|
|
|
tests:: bats
|
|
|
|
|
2025-02-26 21:54:02 +08:00
|
|
|
SLOW_CT_SUITES := amqp_client \
|
|
|
|
backing_queue \
|
2020-01-22 22:50:24 +08:00
|
|
|
channel_interceptor \
|
|
|
|
cluster \
|
2017-03-09 16:55:15 +08:00
|
|
|
cluster_rename \
|
|
|
|
clustering_management \
|
2025-10-03 01:29:28 +08:00
|
|
|
clustering_recovery \
|
2019-01-08 21:19:18 +08:00
|
|
|
config_schema \
|
2020-01-22 22:50:24 +08:00
|
|
|
confirms_rejects \
|
|
|
|
consumer_timeout \
|
|
|
|
crashing_queues \
|
2017-03-09 16:55:15 +08:00
|
|
|
dynamic_ha \
|
2020-01-22 22:50:24 +08:00
|
|
|
dynamic_qq \
|
2017-03-09 16:55:15 +08:00
|
|
|
eager_sync \
|
2019-03-01 22:59:02 +08:00
|
|
|
feature_flags \
|
2017-03-09 16:55:15 +08:00
|
|
|
health_check \
|
2020-01-22 22:50:24 +08:00
|
|
|
many_node_ha \
|
2019-01-08 21:19:18 +08:00
|
|
|
metrics \
|
2017-03-09 16:55:15 +08:00
|
|
|
partitions \
|
2019-01-08 21:19:18 +08:00
|
|
|
per_user_connection_tracking \
|
|
|
|
per_vhost_connection_limit \
|
2020-01-22 22:50:24 +08:00
|
|
|
per_vhost_connection_limit_partitions \
|
2019-01-08 22:01:18 +08:00
|
|
|
per_vhost_msg_store \
|
2019-01-08 21:19:18 +08:00
|
|
|
per_vhost_queue_limit \
|
|
|
|
policy \
|
2017-03-09 16:55:15 +08:00
|
|
|
priority_queue \
|
2020-01-22 22:50:24 +08:00
|
|
|
priority_queue_recovery \
|
|
|
|
publisher_confirms_parallel \
|
|
|
|
queue_parallel \
|
2019-01-08 21:19:18 +08:00
|
|
|
quorum_queue \
|
|
|
|
rabbit_core_metrics_gc \
|
2019-01-08 22:01:18 +08:00
|
|
|
rabbit_fifo_prop \
|
2020-01-22 22:50:24 +08:00
|
|
|
rabbitmq_queues_cli_integration \
|
|
|
|
rabbitmqctl_integration \
|
2019-01-08 21:19:18 +08:00
|
|
|
simple_ha \
|
|
|
|
sync_detection \
|
2020-01-22 22:50:24 +08:00
|
|
|
unit_inbroker_non_parallel \
|
2019-01-08 21:19:18 +08:00
|
|
|
unit_inbroker_parallel \
|
|
|
|
vhost
|
2017-03-09 16:55:15 +08:00
|
|
|
FAST_CT_SUITES := $(filter-out $(sort $(SLOW_CT_SUITES)),$(CT_SUITES))
|
2017-03-07 19:41:32 +08:00
|
|
|
|
2024-07-05 19:23:05 +08:00
|
|
|
ct-fast:
|
|
|
|
$(MAKE) ct CT_SUITES='$(FAST_CT_SUITES)'
|
|
|
|
|
|
|
|
ct-slow:
|
|
|
|
$(MAKE) ct CT_SUITES='$(SLOW_CT_SUITES)'
|
2017-03-07 19:41:32 +08:00
|
|
|
|
2024-09-25 18:24:08 +08:00
|
|
|
# Parallel CT.
|
|
|
|
#
|
|
|
|
# @todo We must ensure that the CT_OPTS also apply to ct-master
|
|
|
|
# @todo We should probably refactor ct_master.erl to have node init in a separate .erl
|
|
|
|
|
2024-08-02 23:29:45 +08:00
|
|
|
define ct_master.erl
|
|
|
|
StartOpts = #{
|
|
|
|
host => "localhost",
|
|
|
|
connection => standard_io,
|
|
|
|
args => ["-hidden"]
|
|
|
|
},
|
|
|
|
{ok, Pid1, _} = peer:start(StartOpts#{name => "rabbit_shard1"}),
|
|
|
|
{ok, Pid2, _} = peer:start(StartOpts#{name => "rabbit_shard2"}),
|
|
|
|
{ok, Pid3, _} = peer:start(StartOpts#{name => "rabbit_shard3"}),
|
|
|
|
{ok, Pid4, _} = peer:start(StartOpts#{name => "rabbit_shard4"}),
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
{ok, Pid5, _} = peer:start(StartOpts#{name => "rabbit_shard5"}),
|
2024-08-02 23:29:45 +08:00
|
|
|
peer:call(Pid1, net_kernel, set_net_ticktime, [5]),
|
|
|
|
peer:call(Pid2, net_kernel, set_net_ticktime, [5]),
|
|
|
|
peer:call(Pid3, net_kernel, set_net_ticktime, [5]),
|
|
|
|
peer:call(Pid4, net_kernel, set_net_ticktime, [5]),
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
peer:call(Pid5, net_kernel, set_net_ticktime, [5]),
|
2025-02-13 22:37:39 +08:00
|
|
|
peer:call(Pid1, persistent_term, put, [rabbit_ct_tcp_port_base, 16000]),
|
|
|
|
peer:call(Pid2, persistent_term, put, [rabbit_ct_tcp_port_base, 20000]),
|
|
|
|
peer:call(Pid3, persistent_term, put, [rabbit_ct_tcp_port_base, 24000]),
|
|
|
|
peer:call(Pid4, persistent_term, put, [rabbit_ct_tcp_port_base, 28000]),
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
peer:call(Pid5, persistent_term, put, [rabbit_ct_tcp_port_base, 32000]),
|
2024-10-15 18:19:08 +08:00
|
|
|
[{[_], {ok, Results}}] = ct_master_fork:run("$1"),
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
peer:stop(Pid5),
|
2024-08-02 23:29:45 +08:00
|
|
|
peer:stop(Pid4),
|
|
|
|
peer:stop(Pid3),
|
|
|
|
peer:stop(Pid2),
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|
|
|
peer:stop(Pid1),
|
2024-10-15 18:19:08 +08:00
|
|
|
lists:foldl(fun
|
|
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|
({_, {_, 0, {_, 0}}}, Err) -> Err + 1;
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|
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(What, Peer) -> halt(Peer)
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|
|
end, 1, Results),
|
|
|
|
halt(0)
|
2024-08-02 23:29:45 +08:00
|
|
|
endef
|
|
|
|
|
2025-06-02 19:21:53 +08:00
|
|
|
PARALLEL_CT_SET_1_A = unit_rabbit_ssl unit_cluster_formation_locking_mocks unit_cluster_formation_sort_nodes unit_collections unit_config_value_encryption unit_connection_tracking
|
2025-07-03 15:04:37 +08:00
|
|
|
PARALLEL_CT_SET_1_B = amqp_address amqp_auth amqp_credit_api_v2 amqp_filter_prop amqp_filter_sql amqp_filter_sql_unit amqp_dotnet amqp_jms signal_handling single_active_consumer unit_access_control_authn_authz_context_propagation unit_access_control_credential_validation unit_amqp091_content_framing unit_amqp091_server_properties unit_app_management
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
PARALLEL_CT_SET_1_C = amqp_proxy_protocol amqpl_consumer_ack backing_queue bindings rabbit_db_maintenance rabbit_db_msup rabbit_db_policy rabbit_db_queue rabbit_db_topic_exchange cluster_limit cluster_minority term_to_binary_compat_prop topic_permission transactions unicode unit_access_control
|
2025-06-25 21:39:54 +08:00
|
|
|
PARALLEL_CT_SET_1_D = amqqueue_backward_compatibility channel_interceptor channel_operation_timeout classic_queue classic_queue_prop config_schema peer_discovery_dns peer_discovery_tmp_hidden_node per_node_limit per_user_connection_channel_limit
|
2024-09-02 20:55:02 +08:00
|
|
|
|
|
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|
PARALLEL_CT_SET_2_A = cluster confirms_rejects consumer_timeout rabbit_access_control rabbit_confirms rabbit_core_metrics_gc rabbit_cuttlefish rabbit_db_binding rabbit_db_exchange
|
2025-10-03 01:29:28 +08:00
|
|
|
PARALLEL_CT_SET_2_B = crashing_queues deprecated_features direct_exchange_routing_v2 disconnect_detected_during_alarm exchanges unit_gen_server2
|
2025-06-25 19:46:17 +08:00
|
|
|
PARALLEL_CT_SET_2_C = disk_monitor dynamic_qq unit_disk_monitor unit_file_handle_cache unit_log_management unit_operator_policy prevent_startup_if_node_was_reset
|
2024-09-02 20:55:02 +08:00
|
|
|
PARALLEL_CT_SET_2_D = queue_length_limits queue_parallel quorum_queue_member_reconciliation rabbit_fifo rabbit_fifo_dlx rabbit_stream_coordinator
|
|
|
|
|
Prevent blocked groups in stream SAC with fine-grained status
A boolean status in the stream SAC coordinator is not enough to follow
the evolution of a consumer. For example a former active consumer that
is stepping down can go down before another consumer in the group is
activated, letting the coordinator expect an activation request that
will never arrive, leaving the group without any active consumer.
This commit introduces 3 status: active (formerly "true"), waiting
(formerly "false"), and deactivating. The coordinator will now know when
a deactivating consumer goes down and will trigger a rebalancing to
avoid a stuck group.
This commit also introduces a status related to the connectivity state
of a consumer. The possible values are: connected, disconnected, and
presumed_down. Consumers are by default connected, they can become
disconnected if the coordinator receives a down event with a
noconnection reason, meaning the node of the consumer has been
disconnected from the other nodes. Consumers can become connected again when
their node joins the other nodes again.
Disconnected consumers are still considered part of a group, as they are
expected to come back at some point. For example there is no rebalancing
in a group if the active consumer got disconnected.
The coordinator sets a timer when a disconnection occurs. When the timer
expires, corresponding disconnected consumers pass into the "presumed
down" state. At this point they are no longer considered part of their
respective group and are excluded from rebalancing decision. They are expected
to get removed from the group by the appropriate down event of a
monitor.
So the consumer status is now a tuple, e.g. {connected, active}. Note
this is an implementation detail: only the stream SAC coordinator deals with
the status of stream SAC consumers.
2 new configuration entries are introduced:
* rabbit.stream_sac_disconnected_timeout: this is the duration in ms of the
disconnected-to-forgotten timer.
* rabbit.stream_cmd_timeout: this is the timeout in ms to apply RA commands
in the coordinator. It used to be a fixed value of 30 seconds. The
default value is still the same. The setting has been introduced to
make integration tests faster.
Fixes #14070
2025-06-10 18:01:18 +08:00
|
|
|
PARALLEL_CT_SET_3_A = definition_import per_user_connection_channel_limit_partitions per_vhost_connection_limit_partitions policy priority_queue_recovery rabbit_fifo_v0 rabbit_stream_sac_coordinator_v4 rabbit_stream_sac_coordinator unit_credit_flow unit_queue_consumers unit_queue_location unit_quorum_queue
|
2024-09-02 20:55:02 +08:00
|
|
|
PARALLEL_CT_SET_3_B = cluster_upgrade list_consumers_sanity_check list_queues_online_and_offline logging lqueue maintenance_mode rabbit_fifo_q
|
|
|
|
PARALLEL_CT_SET_3_C = cli_forget_cluster_node feature_flags_v2 mc_unit message_containers_deaths_v2 message_size_limit metadata_store_migration
|
2025-01-15 00:35:16 +08:00
|
|
|
PARALLEL_CT_SET_3_D = metadata_store_phase1 metrics mirrored_supervisor peer_discovery_classic_config proxy_protocol runtime_parameters unit_stats_and_metrics unit_supervisor2 unit_vm_memory_monitor
|
2024-09-02 20:55:02 +08:00
|
|
|
|
2025-04-17 16:15:32 +08:00
|
|
|
PARALLEL_CT_SET_4_A = clustering_events rabbit_local_random_exchange rabbit_msg_interceptor rabbitmq_4_0_deprecations unit_pg_local unit_plugin_directories unit_plugin_versioning unit_policy_validators unit_priority_queue
|
2024-09-02 20:55:02 +08:00
|
|
|
PARALLEL_CT_SET_4_B = per_user_connection_tracking per_vhost_connection_limit rabbit_fifo_dlx_integration rabbit_fifo_int
|
2024-09-25 19:24:36 +08:00
|
|
|
PARALLEL_CT_SET_4_C = msg_size_metrics unit_msg_size_metrics per_vhost_msg_store per_vhost_queue_limit priority_queue upgrade_preparation vhost
|
2025-03-14 06:59:47 +08:00
|
|
|
PARALLEL_CT_SET_4_D = per_user_connection_channel_tracking product_info publisher_confirms_parallel queue_type rabbitmq_queues_cli_integration rabbitmqctl_integration rabbitmqctl_shutdown routing rabbit_amqqueue
|
2024-09-02 20:55:02 +08:00
|
|
|
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
PARALLEL_CT_SET_5_A = rabbit_direct_reply_to_prop direct_reply_to_amqpl direct_reply_to_amqp
|
|
|
|
|
2024-09-02 20:55:02 +08:00
|
|
|
PARALLEL_CT_SET_1 = $(sort $(PARALLEL_CT_SET_1_A) $(PARALLEL_CT_SET_1_B) $(PARALLEL_CT_SET_1_C) $(PARALLEL_CT_SET_1_D))
|
|
|
|
PARALLEL_CT_SET_2 = $(sort $(PARALLEL_CT_SET_2_A) $(PARALLEL_CT_SET_2_B) $(PARALLEL_CT_SET_2_C) $(PARALLEL_CT_SET_2_D))
|
|
|
|
PARALLEL_CT_SET_3 = $(sort $(PARALLEL_CT_SET_3_A) $(PARALLEL_CT_SET_3_B) $(PARALLEL_CT_SET_3_C) $(PARALLEL_CT_SET_3_D))
|
|
|
|
PARALLEL_CT_SET_4 = $(sort $(PARALLEL_CT_SET_4_A) $(PARALLEL_CT_SET_4_B) $(PARALLEL_CT_SET_4_C) $(PARALLEL_CT_SET_4_D))
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
PARALLEL_CT_SET_5 = $(PARALLEL_CT_SET_5_A)
|
2024-09-02 20:55:02 +08:00
|
|
|
|
2025-10-03 01:29:28 +08:00
|
|
|
SEQUENTIAL_CT_SUITES = amqp_client clustering_management clustering_recovery dead_lettering feature_flags metadata_store_clustering quorum_queue rabbit_stream_queue rabbit_fifo_prop
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
PARALLEL_CT_SUITES = $(PARALLEL_CT_SET_1) $(PARALLEL_CT_SET_2) $(PARALLEL_CT_SET_3) $(PARALLEL_CT_SET_4) $(PARALLEL_CT_SET_5)
|
2024-09-02 20:55:02 +08:00
|
|
|
|
2024-10-17 16:52:28 +08:00
|
|
|
ifeq ($(filter-out $(SEQUENTIAL_CT_SUITES) $(PARALLEL_CT_SUITES),$(CT_SUITES)),)
|
|
|
|
parallel-ct-sanity-check:
|
|
|
|
$(verbose) :
|
|
|
|
else
|
|
|
|
parallel-ct-sanity-check:
|
|
|
|
$(verbose) printf "%s\n" \
|
|
|
|
"In order for new test suites to be run in CI, the test suites" \
|
|
|
|
"must be added to one of the PARALLEL_CT_SET_<N>_<M> variables." \
|
|
|
|
"" \
|
|
|
|
"The following test suites are missing:" \
|
|
|
|
"$(filter-out $(SEQUENTIAL_CT_SUITES) $(PARALLEL_CT_SUITES),$(CT_SUITES))"
|
|
|
|
$(verbose) exit 1
|
2024-09-02 20:55:02 +08:00
|
|
|
endif
|
|
|
|
|
|
|
|
define tpl_parallel_ct_test_spec
|
2024-09-24 19:40:54 +08:00
|
|
|
{logdir, "$(CT_LOGS_DIR)"}.
|
|
|
|
{logdir, master, "$(CT_LOGS_DIR)"}.
|
2024-09-02 20:55:02 +08:00
|
|
|
{create_priv_dir, all_nodes, auto_per_run}.
|
2024-10-15 18:19:08 +08:00
|
|
|
{auto_compile, false}.
|
2024-09-02 20:55:02 +08:00
|
|
|
|
|
|
|
{node, shard1, 'rabbit_shard1@localhost'}.
|
|
|
|
{node, shard2, 'rabbit_shard2@localhost'}.
|
|
|
|
{node, shard3, 'rabbit_shard3@localhost'}.
|
|
|
|
{node, shard4, 'rabbit_shard4@localhost'}.
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
{node, shard5, 'rabbit_shard5@localhost'}.
|
2024-09-02 20:55:02 +08:00
|
|
|
|
|
|
|
{define, 'Set1', [$(call comma_list,$(addsuffix _SUITE,$1))]}.
|
|
|
|
{define, 'Set2', [$(call comma_list,$(addsuffix _SUITE,$2))]}.
|
|
|
|
{define, 'Set3', [$(call comma_list,$(addsuffix _SUITE,$3))]}.
|
|
|
|
{define, 'Set4', [$(call comma_list,$(addsuffix _SUITE,$4))]}.
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
{define, 'Set5', [$(call comma_list,$(addsuffix _SUITE,$5))]}.
|
2024-09-02 20:55:02 +08:00
|
|
|
|
|
|
|
{suites, shard1, "test/", 'Set1'}.
|
|
|
|
{suites, shard2, "test/", 'Set2'}.
|
|
|
|
{suites, shard3, "test/", 'Set3'}.
|
|
|
|
{suites, shard4, "test/", 'Set4'}.
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
{suites, shard5, "test/", 'Set5'}.
|
2024-09-02 20:55:02 +08:00
|
|
|
endef
|
|
|
|
|
|
|
|
define parallel_ct_set_target
|
|
|
|
tpl_parallel_ct_test_spec_set_$1 = $$(call tpl_parallel_ct_test_spec,$(PARALLEL_CT_SET_$(1)_A),$(PARALLEL_CT_SET_$(1)_B),$(PARALLEL_CT_SET_$(1)_C),$(PARALLEL_CT_SET_$(1)_D))
|
|
|
|
|
|
|
|
parallel-ct-set-$(1): test-build
|
|
|
|
$(verbose) mkdir -p $(CT_LOGS_DIR)
|
|
|
|
$(verbose) $$(call core_render,tpl_parallel_ct_test_spec_set_$(1),ct.set-$(1).spec)
|
2024-12-12 19:08:06 +08:00
|
|
|
$$(eval ERL := erl -noinput -boot no_dot_erlang)
|
2024-09-02 20:55:02 +08:00
|
|
|
$$(call erlang,$$(call ct_master.erl,ct.set-$(1).spec),-sname parallel_ct_$(PROJECT)@localhost -hidden -kernel net_ticktime 5)
|
|
|
|
endef
|
|
|
|
|
Support Direct Reply-To for AMQP 1.0
# What?
* Support Direct Reply-To for AMQP 1.0
* Compared to AMQP 0.9.1, this PR allows for multiple volatile queues on a single
AMQP 1.0 session. Use case: JMS clients can create multiple temporary queues on
the same JMS/AMQP session:
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/session#createTemporaryQueue()
* https://jakarta.ee/specifications/messaging/3.1/apidocs/jakarta.messaging/jakarta/jms/jmscontext#createTemporaryQueue()
* Fix missing metrics in for Direct Reply-To in AMQP 0.9.1, e.g.
`messages_delivered_total`
* Fix missing metrics (even without using Direct Reply-To ) in AMQP 0.9.1:
If stats level is not `fine`, global metrics `rabbitmq_global_messages_delivered_*` should still be incremented.
# Why?
* Allow for scalable at-most-once RPC reply delivery
Example use case: thousands of requesters connect, send a single
request, wait for a single reply, and disconnect.
This PR won't create any queue and won't write to the metadata store.
Therefore, there's less pressure on the metadata store, less pressure
on the Management API when listing all queues, less pressure on the
metrics subsystem, etc.
* Feature parity with AMQP 0.9.1
# How?
This PR extracts the previously channel specific Direct Reply-To code
into a new queue type: `rabbit_volatile_queue`.
"Volatile" describes the semantics, not a use-case. It signals non-durable,
zero-buffer, at-most-once, may-drop, and "not stored in Khepri."
This new queue type is then used for AMQP 1.0 and AMQP 0.9.1.
Sending to the volatile queue is stateless like previously with Direct Reply-To in AMQP 0.9.1 and like done
for the MQTT QoS 0 queue.
This allows for use cases where a single responder replies to e.g. 100k different requesters.
RabbitMQ will automatically auto grant new link-credit to the responder because the new queue type confirms immediately.
The key gets implicitly checked by the channel/session:
If the queue name (including the key) doesn’t exist, the `handle_event` callback for this queue isn’t invoked and therefore
no delivery will be sent to the responder.
This commit supports Direct Reply-To across AMQP 1.0 and 0.9.1. In other
words, the requester can be an AMQP 1.0 client while the responder is an
AMQP 0.9.1 client or vice versa.
RabbitMQ will internally convert between AMQP 0.9.1 `reply_to` and AMQP
1.0 `/queues/<queue>` address. The AMQP 0.9.1 `reply_to` property is
expected to contain a queue name. That's in line with the AMQP 0.9.1
spec:
> One of the standard message properties is Reply-To, which is designed
specifically for carrying the name of reply queues.
Compared to AMQP 0.9.1 where the requester sets the `reply_to` property
to `amq.rabbitmq.reply-to` and RabbitMQ modifies this field when
forwarding the message to the request queue, in AMQP 1.0 the requester
learns about the queue name from the broker at link attachment time.
The requester has to set the reply-to property to the server generated
queue name. That's because the server isn't allowed to modify the bare
message.
During link attachment time, the client has to set certain fields.
These fields are expected to be set by the RabbitMQ client libraries.
Here is an Erlang example:
```erl
Source = #{address => undefined,
durable => none,
expiry_policy => <<"link-detach">>,
dynamic => true,
capabilities => [<<"rabbitmq:volatile-queue">>]},
AttachArgs = #{name => <<"receiver">>,
role => {receiver, Source, self()},
snd_settle_mode => settled,
rcv_settle_mode => first},
{ok, Receiver} = amqp10_client:attach_link(Session, AttachArgs),
AddressReplyQ = receive {amqp10_event, {link, Receiver, {attached, Attach}}} ->
#'v1_0.attach'{source = #'v1_0.source'{address = {utf8, Addr}}} = Attach,
Addr
end,
```
The client then sends the message by setting the reply-to address as
follows:
```erl
amqp10_client:send_msg(
SenderRequester,
amqp10_msg:set_properties(
#{message_id => <<"my ID">>,
reply_to => AddressReplyQ},
amqp10_msg:new(<<"tag">>, <<"request">>))),
```
If the responder attaches to the queue target in the reply-to field,
RabbitMQ will check if the requester link is still attached. If the
requester detached, the link will be refused.
The responder can also attach to the anonymous null target and set the
`to` field to the `reply-to` address.
If RabbitMQ cannot deliver a reply, instead of buffering the reply,
RabbitMQ will be drop the reply and increment the following Prometheus metric:
```
rabbitmq_global_messages_dead_lettered_maxlen_total{queue_type="rabbit_volatile_queue",dead_letter_strategy="disabled"} 0.0
```
That's in line with the MQTT QoS 0 queue type.
A reply message could be dropped for a variety of reasons:
1. The requester ran out of link-credit. It's therefore the requester's
responsibility to grant sufficient link-credit on its receiving link.
2. RabbitMQ isn't allowed to deliver any message to due session flow
control. It's the requster's responsibility to keep the session window
large enough.
3. The requester doesn't consume messages fast enough causing TCP
backpressure being applied or the RabbitMQ AMQP writer proc isn't
scheduled quickly enough. The latter can happen for example if
RabbitMQ runs with a single scheduler (is assigned a single CPU
core). In either case, RabbitMQ internal flow control causes the
volatile queue to drop messages.
Therefore, if high throughput is required while message loss is undesirable, a classic queue should be used
instead of a volatile queue since the former buffers messages while the
latter doesn't.
The main difference between the volatile queue and the MQTT QoS 0 queue
is that the former isn't written to the metadata store.
# Breaking Change
Prior to this PR the following [documented caveat](https://www.rabbitmq.com/docs/4.0/direct-reply-to#limitations) applied:
> If the RPC server publishes with the mandatory flag set then `amq.rabbitmq.reply-to.*`
is treated as **not** a queue; i.e. if the server only publishes to this name then the message
will be considered "not routed"; a `basic.return` will be sent if the mandatory flag was set.
This PR removes this caveat.
This PR introduces the following new behaviour:
> If the RPC server publishes with the mandatory flag set, then `amq.rabbitmq.reply-to.*`
is treated as a queue (assuming this queue name is encoded correctly). However,
whether the requester is still there to consume the reply is not checked at routing time.
In other words, if the RPC server only publishes to this name, then the message will be
considered "routed" and RabbitMQ will therefore not send a `basic.return`.
2025-08-06 20:57:27 +08:00
|
|
|
$(foreach set,1 2 3 4 5,$(eval $(call parallel_ct_set_target,$(set))))
|
2024-09-02 20:55:02 +08:00
|
|
|
|
2015-08-27 23:12:32 +08:00
|
|
|
# --------------------------------------------------------------------
|
|
|
|
# Compilation.
|
|
|
|
# --------------------------------------------------------------------
|
|
|
|
|
2015-08-25 23:46:35 +08:00
|
|
|
RMQ_ERLC_OPTS += -I $(DEPS_DIR)/rabbit_common/include
|
Deprecated features: New module to manage deprecated features (!)
This introduces a way to declare deprecated features in the code, not
only in our communication. The new module allows to disallow the use of
a deprecated feature and/or warn the user when he relies on such a
feature.
[Why]
Currently, we only tell people about deprecated features through blog
posts and the mailing-list. This might be insufficiant for our users
that a feature they use will be removed in a future version:
* They may not read our blog or mailing-list
* They may not understand that they use such a deprecated feature
* They might wait for the big removal before they plan testing
* They might not take it seriously enough
The idea behind this patch is to increase the chance that users notice
that they are using something which is about to be dropped from
RabbitMQ. Anopther benefit is that they should be able to test how
RabbitMQ will behave in the future before the actual removal. This
should allow them to test and plan changes.
[How]
When a feature is deprecated in other large projects (such as FreeBSD
where I took the idea from), it goes through a lifecycle:
1. The feature is still available, but users get a warning somehow when
they use it. They can disable it to test.
2. The feature is still available, but disabled out-of-the-box. Users
can re-enable it (and get a warning).
3. The feature is disconnected from the build. Therefore, the code
behind it is still there, but users have to recompile the thing to be
able to use it.
4. The feature is removed from the source code. Users have to adapt or
they can't upgrade anymore.
The solution in this patch offers the same lifecycle. A deprecated
feature will be in one of these deprecation phases:
1. `permitted_by_default`: The feature is available. Users get a warning
if they use it. They can disable it from the configuration.
2. `denied_by_default`: The feature is available but disabled by
default. Users get an error if they use it and RabbitMQ behaves like
the feature is removed. They can re-enable is from the configuration
and get a warning.
3. `disconnected`: The feature is present in the source code, but is
disabled and can't be re-enabled without recompiling RabbitMQ. Users
get the same behavior as if the code was removed.
4. `removed`: The feature's code is gone.
The whole thing is based on the feature flags subsystem, but it has the
following differences with other feature flags:
* The semantic is reversed: the feature flag behind a deprecated feature
is disabled when the deprecated feature is permitted, or enabled when
the deprecated feature is denied.
* The feature flag behind a deprecated feature is enabled out-of-the-box
(meaning the deprecated feature is denied):
* if the deprecation phase is `permitted_by_default` and the
configuration denies the deprecated feature
* if the deprecation phase is `denied_by_default` and the
configuration doesn't permit the deprecated feature
* if the deprecation phase is `disconnected` or `removed`
* Feature flags behind deprecated feature don't appear in feature flags
listings.
Otherwise, deprecated features' feature flags are managed like other
feature flags, in particular inside clusters.
To declare a deprecated feature:
-rabbit_deprecated_feature(
{my_deprecated_feature,
#{deprecation_phase => permitted_by_default,
msgs => #{when_permitted => "This feature will be removed in RabbitMQ X.0"},
}}).
Then, to check the state of a deprecated feature in the code:
case rabbit_deprecated_features:is_permitted(my_deprecated_feature) of
true ->
%% The deprecated feature is still permitted.
ok;
false ->
%% The deprecated feature is gone or should be considered
%% unavailable.
error
end.
Warnings and errors are logged automatically. A message is generated
automatically, but it is possible to define a message in the deprecated
feature flag declaration like in the example above.
Here is an example of a logged warning that was generated automatically:
Feature `my_deprecated_feature` is deprecated.
By default, this feature can still be used for now.
Its use will not be permitted by default in a future minor RabbitMQ version and the feature will be removed from a future major RabbitMQ version; actual versions to be determined.
To continue using this feature when it is not permitted by default, set the following parameter in your configuration:
"deprecated_features.permit.my_deprecated_feature = true"
To test RabbitMQ as if the feature was removed, set this in your configuration:
"deprecated_features.permit.my_deprecated_feature = false"
To override the default state of `permitted_by_default` and
`denied_by_default` deprecation phases, users can set the following
configuration:
# In rabbitmq.conf:
deprecated_features.permit.my_deprecated_feature = true # or false
The actual behavior protected by a deprecated feature check is out of
scope for this subsystem. It is the repsonsibility of each deprecated
feature code to determine what to do when the deprecated feature is
denied.
V1: Deprecated feature states are initially computed during the
initialization of the registry, based on their deprecation phase and
possibly the configuration. They don't go through the `enable/1`
code at all.
V2: Manage deprecated feature states as any other non-required
feature flags. This allows to execute an `is_feature_used()`
callback to determine if a deprecated feature can be denied. This
also allows to prevent the RabbitMQ node from starting if it
continues to use a deprecated feature.
V3: Manage deprecated feature states from the registry initialization
again. This is required because we need to know very early if some
of them are denied, so that an upgrade to a version of RabbitMQ
where a deprecated feature is disconnected or removed can be
performed.
To still prevent the start of a RabbitMQ node when a denied
deprecated feature is actively used, we run the `is_feature_used()`
callback of all denied deprecated features as part of the
`sync_cluster()` task. This task is executed as part of a feature
flag refresh executed when RabbitMQ starts or when plugins are
enabled. So even though a deprecated feature is marked as denied in
the registry early in the boot process, we will still abort the
start of a RabbitMQ node if the feature is used.
V4: Support context-dependent warnings. It is now possible to set a
specific message when deprecated feature is permitted, when it is
denied and when it is removed. Generic per-context messages are
still generated.
V5: Improve default warning messages, thanks to @pstack2021.
V6: Rename the configuration variable from `permit_deprecated_features.*`
to `deprecated_features.permit.*`. As @michaelklishin said, we tend
to use shorter top-level names.
2023-02-23 00:26:52 +08:00
|
|
|
EDOC_OPTS += {preprocess,true},{includes,["."]}
|
2010-03-23 19:23:55 +08:00
|
|
|
|
2015-08-10 17:50:41 +08:00
|
|
|
ifdef INSTRUMENT_FOR_QC
|
2015-08-14 18:21:42 +08:00
|
|
|
RMQ_ERLC_OPTS += -DINSTR_MOD=gm_qc
|
2021-04-09 19:13:47 +08:00
|
|
|
EDOC_OPTS += ,{macros,[{'INSTR_MOD',gm_qc}]}
|
2010-03-23 19:23:55 +08:00
|
|
|
else
|
2015-08-14 18:21:42 +08:00
|
|
|
RMQ_ERLC_OPTS += -DINSTR_MOD=gm
|
2021-04-09 19:13:47 +08:00
|
|
|
EDOC_OPTS += ,{macros,[{'INSTR_MOD',gm}]}
|
2010-03-23 19:23:55 +08:00
|
|
|
endif
|
|
|
|
|
2015-08-10 17:50:41 +08:00
|
|
|
ifdef CREDIT_FLOW_TRACING
|
2015-08-14 18:21:42 +08:00
|
|
|
RMQ_ERLC_OPTS += -DCREDIT_FLOW_TRACING=true
|
2015-08-10 17:50:41 +08:00
|
|
|
endif
|
|
|
|
|
2022-08-29 05:41:54 +08:00
|
|
|
ifdef TRACE_SUPERVISOR2
|
|
|
|
RMQ_ERLC_OPTS += -DTRACE_SUPERVISOR2=true
|
|
|
|
endif
|
|
|
|
|
Support SQL filter expressions for streams
## What?
This commit allows AMQP 1.0 clients to define SQL-like filter expressions when consuming from streams, enabling server-side message filtering.
RabbitMQ will only dispatch messages that match the provided filter expression, reducing network traffic and client-side processing overhead.
SQL filter expressions are a more powerful alternative to the [AMQP Property Filter Expressions](https://www.rabbitmq.com/blog/2024/12/13/amqp-filter-expressions) introduced in RabbitMQ 4.1.
SQL filter expressions are based on the [JMS message selector syntax](https://jakarta.ee/specifications/messaging/3.1/jakarta-messaging-spec-3.1#message-selector-syntax) and support:
* Comparison operators (`=`, `<>`, `>`, `<`, `>=`, `<=`)
* Logical operators (`AND`, `OR`, `NOT`)
* Arithmetic operators (`+`, `-`, `*`, `/`)
* Special operators (`BETWEEN`, `LIKE`, `IN`, `IS NULL`)
* Access to the properties and application-properties sections
**Examples**
Simple expression:
```sql
header.priority > 4
```
Complex expression:
```sql
order_type IN ('premium', 'express') AND
total_amount BETWEEN 100 AND 5000 AND
(customer_region LIKE 'EU-%' OR customer_region = 'US-CA') AND
properties.creation-time >= 1750772279000 AND
NOT cancelled
```
Like AMQP property filter expressions, SQL filter expressions can be
combined with Bloom filters. Combining both allows for highly customisable
expressions (SQL) and extremely fast evaluation (Bloom filter) if only a
subset of the chunks need to be read from disk.
## Why?
Compared to AMQP property filter expressions, SQL filter expressions provide the following advantage:
* High expressiveness and flexibility in defining the filter
Like for AMQP property filter expressions, the following advantages apply:
* No false positives (as is the case for Bloom filters)
* Multiple concurrent clients can attach to the same stream each consuming
only a specific subset of messages while preserving message order.
* Low network overhead as only messages that match the filter are
transferred to the client
* Likewise, lower resource usage (CPU and memory) on clients since they
don't need to deserialise messages that they are not interested in.
* If the SQL expression is simple, even the broker will save resources
because it doesn't need to serialse and send messages that the client
isn't interested in.
## How?
### JMS Message Selector Syntax vs. AMQP Extension Spec
The AMQP Filter Expressions Version 1.0 extension Working Draft 09 defines SQL Filter Expressions in Section 6.
This spec differs from the JMS message selector spec. Neither is a subset of the other. We can choose to follow either.
However, I think it makes most sense to follow the JMS spec because:
* The JMS spec is better defined
* The JMS spec is far more widespread than the AMQP Working Draft spec. (A slight variation of the AMQP Working
Draft is used by Azure Service Bus: https://learn.microsoft.com/en-us/azure/service-bus-messaging/service-bus-messaging-sql-filter)
* The JMS spec is mostly simpler (partly because matching on only simple types)
* This will allow for a single SQL parser in RabbitMQ for both AMQP clients consuming from a stream and possibly in future for JMS clients consuming from queues or topics.
<details>
<summary>AMQP extension spec vs JMS spec</summary>
AMQP
!= is synonym for <>
JMS
defines only <>
Conclusion
<> is sufficient
AMQP
Strings can be tested for “greater than”
“both operands are of type string or of type symbol (any combination is permitted) and
the lexicographical rank of the left operand is greater than the lexicographical rank of the right operand”
JMS
“String and Boolean comparison is restricted to = and <>.”
Conclusion
The JMS behaviour is sufficient.
AMQP
IN <set-expression>
set-expression can contain non-string literals
JMS:
set-expression can contain only string literals
Conclusion
The JMS behaviour is sufficient.
AMQP
EXISTS predicate to check for composite types
JMS
Only simple types
Conclusion
We want to match only for simple types, i.e. allowing matching only against values in the application-properties, properties sections and priority field of the header section.
AMQP:
Modulo operator %
Conclusion
JMS doesn't define the modulo operator. Let's start without it.
We can decide in future to add support since it can actually be useful, for example for two receivers who want to process every other message.
AMQP:
The ‘+’ operator can concatenate string and symbol values
Conclusion
Such string concatenation isn't defined in JMS. We don't need it.
AMQP:
Define NAN and INF
JMS:
“Approximate literals use the Java floating-point literal syntax.”
Examples include "7."
Conclusion
We can go with the JMS spec given that needs to be implemented anyway
for JMS support.
Scientific notations are supported in both the AMQP spec and JMS spec.
AMQP
String literals can be surrounded by single or double quotation marks
JMS
A string literal is enclosed in single quotes
Conclusion
Supporting single quotes is good enough.
AMQP
“A binary constant is a string of pairs of hexadecimal digits prefixed by ‘0x’ that are not enclosed in quotation marks”
Conclusion
JMS doesn't support binary constants. We can start without binary constants.
Matching against binary values are still supported if these binary values can be expressed as UTF-8 strings.
AMQP
Functions DATE, UTC, SUBSTRING, LOWER, UPPER, LEFT, RIGHT
Vendor specific functions
Conclusion
JMS doesn't define such functions. We can start without those functions.
AMQP
<field><array_element_reference>
<field>‘.’<composite_type_reference>
to access map and array elements
Conclusion
Same as above:
We want to match only for simple types, i.e. allowing matching only against values in the application-properties, properties sections and priority field of the header section.
AMQP
allows for delimited identifiers
JMS
Java identifier part characters
Conclusion
We can go with the Java identifiers extending the allowed characters by
`.` and `-` to reference field names such as `properties.group-id`.
JMS:
BETWEEN operator
Conclusion
The BETWEEN operator isn't supported in the AMQP spec. Let's support it as convenience since it's already available in JMS.
</details>
### Filter Name
The client provides a filter with name `sql-filter` instead of name
`jms-selector` to allow to differentiate between JMS clients and other
native AMQP 1.0 clients using SQL expressions. This way, we can also
optionally extend the SQL grammar in future.
### Identifiers
JMS message selectors allow identifiers to contain some well known JMS headers that match to well known AMQP fields, for example:
```erl
jms_header_to_amqp_field_name(<<"JMSDeliveryMode">>) -> durable;
jms_header_to_amqp_field_name(<<"JMSPriority">>) -> priority;
jms_header_to_amqp_field_name(<<"JMSMessageID">>) -> message_id;
jms_header_to_amqp_field_name(<<"JMSTimestamp">>) -> creation_time;
jms_header_to_amqp_field_name(<<"JMSCorrelationID">>) -> correlation_id;
jms_header_to_amqp_field_name(<<"JMSType">>) -> subject;
%% amqp-bindmap-jms-v1.0-wd10 § 3.2.2 JMS-defined ’JMSX’ Properties
jms_header_to_amqp_field_name(<<"JMSXUserID">>) -> user_id;
jms_header_to_amqp_field_name(<<"JMSXGroupID">>) -> group_id;
jms_header_to_amqp_field_name(<<"JMSXGroupSeq">>) -> group_sequence;
```
This commit does a similar matching for `header.` and `properties.` prefixed identifiers to field names in the AMQP property section.
The only field that is supported to filter on in the AMQP header section is `priority`, that is identifier `header.priority`.
By default, as described in the AMQP extension spec, if an identifier is not prefixed, it refers to a key in the application-properties section.
Hence, all identifiers prefixed with `header.`, and `properties.` have special meanings and MUST be avoided by applications unless they want to refer to those specific fields.
Azure Service Bus uses the `sys.` and `user.` prefixes for well known field names and arbitrary application-provided keys, respectively.
### SQL lexer, parser and evaluator
This commit implements the SQL lexer and parser in files rabbit_jms_selector_lexer.xrl and
rabbit_jms_selector_parser.yrl, respectively.
Advantages:
* Both the definitions in the lexer and the grammar in the parser are defined **declaratively**.
* In total, the entire SQL syntax and grammar is defined in only 240 lines.
* Therefore, lexer and parser are simple to maintain.
The idea of this commit is to use the same lexer and parser for native AMQP clients consumings
from streams (this commit) as for JMS clients (in the future).
All native AMQP client vs JMS client bits are then manipulated after
the Abstract Syntax Tree (AST) has been created by the parser.
For example, this commit transforms the AST specifically for native AMQP clients
by mapping `properties.` prefixed identifiers (field names) to atoms.
A JMS client's mapping from `JMS` prefixed headers can transform the AST
differently.
Likewise, this commit transforms the AST to compile a regex for complex LIKE
expressions when consuming from a stream while a future version
might not want to compile a regex when consuming from quorum queues.
Module `rabbit_jms_ast` provides such AST helper methods.
The lexer and parser are not performance critical as this work happens
upon receivers attaching to the stream.
The evaluator however is performance critical as message evaluation
happens on the hot path.
### LIKE expressions
The evaluator has been optimised to only compile a regex when necessary.
If the LIKE expression-value contains no wildcard or only a single `%`
wildcard, Erlang pattern matching is used as it's more efficient.
Since `_` can match any UTF-8 character, a regex will be compiled with
the `[unicode]` options.
### Filter errors
Any errors upon a receiver attaching to a stream causes the filter to
not become active. RabbitMQ will log a warning describing the reason and
will omit the named filter in its attach reply frame. The client lib is
responsible for detaching the link as explained in the AMQP spec:
> The receiving endpoint sets its desired filter, the sending endpoint sets the filter actually in place
(including any filters defaulted at the node). The receiving endpoint MUST check that the filter in
place meets its needs and take responsibility for detaching if it does not.
This applies to lexer and parser errors.
Errors during message evaluation will result in an unknown value.
Conditional operators on unknown are described in the JMS spec. If the
entire selector condition is unknown, the message does not match, and
will therefore not be delivered to the client.
## Clients
Support for passing the SQL expression from app to broker is provided by
the Java client in https://github.com/rabbitmq/rabbitmq-amqp-java-client/pull/216
2025-06-10 22:43:14 +08:00
|
|
|
# https://www.erlang.org/doc/apps/parsetools/leex.html#file/2
|
2025-09-26 00:08:24 +08:00
|
|
|
ifndef NON_DETERMINISTIC
|
|
|
|
YRL_ERLC_OPTS += +deterministic
|
|
|
|
endif
|
Support SQL filter expressions for streams
## What?
This commit allows AMQP 1.0 clients to define SQL-like filter expressions when consuming from streams, enabling server-side message filtering.
RabbitMQ will only dispatch messages that match the provided filter expression, reducing network traffic and client-side processing overhead.
SQL filter expressions are a more powerful alternative to the [AMQP Property Filter Expressions](https://www.rabbitmq.com/blog/2024/12/13/amqp-filter-expressions) introduced in RabbitMQ 4.1.
SQL filter expressions are based on the [JMS message selector syntax](https://jakarta.ee/specifications/messaging/3.1/jakarta-messaging-spec-3.1#message-selector-syntax) and support:
* Comparison operators (`=`, `<>`, `>`, `<`, `>=`, `<=`)
* Logical operators (`AND`, `OR`, `NOT`)
* Arithmetic operators (`+`, `-`, `*`, `/`)
* Special operators (`BETWEEN`, `LIKE`, `IN`, `IS NULL`)
* Access to the properties and application-properties sections
**Examples**
Simple expression:
```sql
header.priority > 4
```
Complex expression:
```sql
order_type IN ('premium', 'express') AND
total_amount BETWEEN 100 AND 5000 AND
(customer_region LIKE 'EU-%' OR customer_region = 'US-CA') AND
properties.creation-time >= 1750772279000 AND
NOT cancelled
```
Like AMQP property filter expressions, SQL filter expressions can be
combined with Bloom filters. Combining both allows for highly customisable
expressions (SQL) and extremely fast evaluation (Bloom filter) if only a
subset of the chunks need to be read from disk.
## Why?
Compared to AMQP property filter expressions, SQL filter expressions provide the following advantage:
* High expressiveness and flexibility in defining the filter
Like for AMQP property filter expressions, the following advantages apply:
* No false positives (as is the case for Bloom filters)
* Multiple concurrent clients can attach to the same stream each consuming
only a specific subset of messages while preserving message order.
* Low network overhead as only messages that match the filter are
transferred to the client
* Likewise, lower resource usage (CPU and memory) on clients since they
don't need to deserialise messages that they are not interested in.
* If the SQL expression is simple, even the broker will save resources
because it doesn't need to serialse and send messages that the client
isn't interested in.
## How?
### JMS Message Selector Syntax vs. AMQP Extension Spec
The AMQP Filter Expressions Version 1.0 extension Working Draft 09 defines SQL Filter Expressions in Section 6.
This spec differs from the JMS message selector spec. Neither is a subset of the other. We can choose to follow either.
However, I think it makes most sense to follow the JMS spec because:
* The JMS spec is better defined
* The JMS spec is far more widespread than the AMQP Working Draft spec. (A slight variation of the AMQP Working
Draft is used by Azure Service Bus: https://learn.microsoft.com/en-us/azure/service-bus-messaging/service-bus-messaging-sql-filter)
* The JMS spec is mostly simpler (partly because matching on only simple types)
* This will allow for a single SQL parser in RabbitMQ for both AMQP clients consuming from a stream and possibly in future for JMS clients consuming from queues or topics.
<details>
<summary>AMQP extension spec vs JMS spec</summary>
AMQP
!= is synonym for <>
JMS
defines only <>
Conclusion
<> is sufficient
AMQP
Strings can be tested for “greater than”
“both operands are of type string or of type symbol (any combination is permitted) and
the lexicographical rank of the left operand is greater than the lexicographical rank of the right operand”
JMS
“String and Boolean comparison is restricted to = and <>.”
Conclusion
The JMS behaviour is sufficient.
AMQP
IN <set-expression>
set-expression can contain non-string literals
JMS:
set-expression can contain only string literals
Conclusion
The JMS behaviour is sufficient.
AMQP
EXISTS predicate to check for composite types
JMS
Only simple types
Conclusion
We want to match only for simple types, i.e. allowing matching only against values in the application-properties, properties sections and priority field of the header section.
AMQP:
Modulo operator %
Conclusion
JMS doesn't define the modulo operator. Let's start without it.
We can decide in future to add support since it can actually be useful, for example for two receivers who want to process every other message.
AMQP:
The ‘+’ operator can concatenate string and symbol values
Conclusion
Such string concatenation isn't defined in JMS. We don't need it.
AMQP:
Define NAN and INF
JMS:
“Approximate literals use the Java floating-point literal syntax.”
Examples include "7."
Conclusion
We can go with the JMS spec given that needs to be implemented anyway
for JMS support.
Scientific notations are supported in both the AMQP spec and JMS spec.
AMQP
String literals can be surrounded by single or double quotation marks
JMS
A string literal is enclosed in single quotes
Conclusion
Supporting single quotes is good enough.
AMQP
“A binary constant is a string of pairs of hexadecimal digits prefixed by ‘0x’ that are not enclosed in quotation marks”
Conclusion
JMS doesn't support binary constants. We can start without binary constants.
Matching against binary values are still supported if these binary values can be expressed as UTF-8 strings.
AMQP
Functions DATE, UTC, SUBSTRING, LOWER, UPPER, LEFT, RIGHT
Vendor specific functions
Conclusion
JMS doesn't define such functions. We can start without those functions.
AMQP
<field><array_element_reference>
<field>‘.’<composite_type_reference>
to access map and array elements
Conclusion
Same as above:
We want to match only for simple types, i.e. allowing matching only against values in the application-properties, properties sections and priority field of the header section.
AMQP
allows for delimited identifiers
JMS
Java identifier part characters
Conclusion
We can go with the Java identifiers extending the allowed characters by
`.` and `-` to reference field names such as `properties.group-id`.
JMS:
BETWEEN operator
Conclusion
The BETWEEN operator isn't supported in the AMQP spec. Let's support it as convenience since it's already available in JMS.
</details>
### Filter Name
The client provides a filter with name `sql-filter` instead of name
`jms-selector` to allow to differentiate between JMS clients and other
native AMQP 1.0 clients using SQL expressions. This way, we can also
optionally extend the SQL grammar in future.
### Identifiers
JMS message selectors allow identifiers to contain some well known JMS headers that match to well known AMQP fields, for example:
```erl
jms_header_to_amqp_field_name(<<"JMSDeliveryMode">>) -> durable;
jms_header_to_amqp_field_name(<<"JMSPriority">>) -> priority;
jms_header_to_amqp_field_name(<<"JMSMessageID">>) -> message_id;
jms_header_to_amqp_field_name(<<"JMSTimestamp">>) -> creation_time;
jms_header_to_amqp_field_name(<<"JMSCorrelationID">>) -> correlation_id;
jms_header_to_amqp_field_name(<<"JMSType">>) -> subject;
%% amqp-bindmap-jms-v1.0-wd10 § 3.2.2 JMS-defined ’JMSX’ Properties
jms_header_to_amqp_field_name(<<"JMSXUserID">>) -> user_id;
jms_header_to_amqp_field_name(<<"JMSXGroupID">>) -> group_id;
jms_header_to_amqp_field_name(<<"JMSXGroupSeq">>) -> group_sequence;
```
This commit does a similar matching for `header.` and `properties.` prefixed identifiers to field names in the AMQP property section.
The only field that is supported to filter on in the AMQP header section is `priority`, that is identifier `header.priority`.
By default, as described in the AMQP extension spec, if an identifier is not prefixed, it refers to a key in the application-properties section.
Hence, all identifiers prefixed with `header.`, and `properties.` have special meanings and MUST be avoided by applications unless they want to refer to those specific fields.
Azure Service Bus uses the `sys.` and `user.` prefixes for well known field names and arbitrary application-provided keys, respectively.
### SQL lexer, parser and evaluator
This commit implements the SQL lexer and parser in files rabbit_jms_selector_lexer.xrl and
rabbit_jms_selector_parser.yrl, respectively.
Advantages:
* Both the definitions in the lexer and the grammar in the parser are defined **declaratively**.
* In total, the entire SQL syntax and grammar is defined in only 240 lines.
* Therefore, lexer and parser are simple to maintain.
The idea of this commit is to use the same lexer and parser for native AMQP clients consumings
from streams (this commit) as for JMS clients (in the future).
All native AMQP client vs JMS client bits are then manipulated after
the Abstract Syntax Tree (AST) has been created by the parser.
For example, this commit transforms the AST specifically for native AMQP clients
by mapping `properties.` prefixed identifiers (field names) to atoms.
A JMS client's mapping from `JMS` prefixed headers can transform the AST
differently.
Likewise, this commit transforms the AST to compile a regex for complex LIKE
expressions when consuming from a stream while a future version
might not want to compile a regex when consuming from quorum queues.
Module `rabbit_jms_ast` provides such AST helper methods.
The lexer and parser are not performance critical as this work happens
upon receivers attaching to the stream.
The evaluator however is performance critical as message evaluation
happens on the hot path.
### LIKE expressions
The evaluator has been optimised to only compile a regex when necessary.
If the LIKE expression-value contains no wildcard or only a single `%`
wildcard, Erlang pattern matching is used as it's more efficient.
Since `_` can match any UTF-8 character, a regex will be compiled with
the `[unicode]` options.
### Filter errors
Any errors upon a receiver attaching to a stream causes the filter to
not become active. RabbitMQ will log a warning describing the reason and
will omit the named filter in its attach reply frame. The client lib is
responsible for detaching the link as explained in the AMQP spec:
> The receiving endpoint sets its desired filter, the sending endpoint sets the filter actually in place
(including any filters defaulted at the node). The receiving endpoint MUST check that the filter in
place meets its needs and take responsibility for detaching if it does not.
This applies to lexer and parser errors.
Errors during message evaluation will result in an unknown value.
Conditional operators on unknown are described in the JMS spec. If the
entire selector condition is unknown, the message does not match, and
will therefore not be delivered to the client.
## Clients
Support for passing the SQL expression from app to broker is provided by
the Java client in https://github.com/rabbitmq/rabbitmq-amqp-java-client/pull/216
2025-06-10 22:43:14 +08:00
|
|
|
|
2015-08-14 00:48:53 +08:00
|
|
|
# --------------------------------------------------------------------
|
2015-08-14 01:01:27 +08:00
|
|
|
# Documentation.
|
2015-08-14 00:48:53 +08:00
|
|
|
# --------------------------------------------------------------------
|
|
|
|
|
2015-10-07 00:48:45 +08:00
|
|
|
.PHONY: manpages web-manpages distclean-manpages
|
|
|
|
|
|
|
|
docs:: manpages web-manpages
|
|
|
|
|
|
|
|
manpages: $(MANPAGES)
|
|
|
|
@:
|
|
|
|
|
2023-12-18 19:16:04 +08:00
|
|
|
web-manpages: $(WEB_MANPAGES) $(MD_MANPAGES)
|
2015-10-07 00:48:45 +08:00
|
|
|
@:
|
2015-08-14 00:48:53 +08:00
|
|
|
|
2017-04-25 16:50:00 +08:00
|
|
|
# We use mandoc(1) to convert manpages to HTML plus an awk script which
|
|
|
|
# does:
|
|
|
|
# 1. remove tables at the top and the bottom (they recall the
|
|
|
|
# manpage name, section and date)
|
|
|
|
# 2. "downgrade" headers by one level (eg. h1 -> h2)
|
|
|
|
# 3. annotate .Dl lines with more CSS classes
|
|
|
|
%.html: %
|
|
|
|
$(gen_verbose) mandoc -T html -O 'fragment,man=%N.%S.html' "$<" | \
|
|
|
|
awk '\
|
|
|
|
/^<table class="head">$$/ { remove_table=1; next; } \
|
|
|
|
/^<table class="foot">$$/ { remove_table=1; next; } \
|
|
|
|
/^<\/table>$$/ { if (remove_table) { remove_table=0; next; } } \
|
|
|
|
{ if (!remove_table) { \
|
|
|
|
line=$$0; \
|
|
|
|
gsub(/<h2/, "<h3", line); \
|
|
|
|
gsub(/<\/h2>/, "</h3>", line); \
|
|
|
|
gsub(/<h1/, "<h2", line); \
|
|
|
|
gsub(/<\/h1>/, "</h2>", line); \
|
2019-01-31 10:08:57 +08:00
|
|
|
gsub(/class="D1"/, "class=\"D1 lang-bash\"", line); \
|
|
|
|
gsub(/class="Bd Bd-indent"/, "class=\"Bd Bd-indent lang-bash\"", line); \
|
2019-09-05 06:53:01 +08:00
|
|
|
gsub(/&#[xX]201[cCdD];/, "\\"", line); \
|
2024-09-23 19:24:54 +08:00
|
|
|
gsub(/\.html/, "", line); \
|
2017-04-25 16:50:00 +08:00
|
|
|
print line; \
|
|
|
|
} } \
|
|
|
|
' > "$@"
|
|
|
|
|
2023-12-18 19:16:04 +08:00
|
|
|
%.md: %
|
|
|
|
$(gen_verbose) mandoc -T markdown -O 'fragment,man=%N.%S.md' "$<" | \
|
|
|
|
sed -E -e 's/\{/\{/g' \
|
|
|
|
> "$@"
|
|
|
|
|
2015-08-14 00:48:53 +08:00
|
|
|
distclean:: distclean-manpages
|
|
|
|
|
|
|
|
distclean-manpages::
|
2023-12-18 19:16:04 +08:00
|
|
|
$(gen_verbose) rm -f $(WEB_MANPAGES) $(MD_MANPAGES)
|