AlertingNG: Add alert provider and basic structure with dispatcher, silences and delivery stages (#31833)

* AlertingNG: Add alert provider

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Add unit tests

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Alertmanager WIP

* Merge alertmanager into notifier

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Fixes for PR 31833 (#31990)

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Use alertmanager from upgrad-uuid temporarily to unblock

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Fix lint

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

Co-authored-by: Josue Abreu <josue@grafana.com>

go.mod

@@ -27,6 +27,7 @@ require (
 	github.com/fatih/color v1.10.0
 	github.com/gchaincl/sqlhooks v1.3.0
 	github.com/getsentry/sentry-go v0.10.0
+	github.com/go-kit/kit v0.10.0
 	github.com/go-macaron/binding v0.0.0-20190806013118-0b4f37bab25b
 	github.com/go-macaron/gzip v0.0.0-20160222043647-cad1c6580a07
 	github.com/go-sourcemap/sourcemap v2.1.3+incompatible
@@ -61,9 +62,11 @@ require (
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pkg/errors v0.9.1
+	github.com/prometheus/alertmanager v0.21.1-0.20210315141118-bf9c43b57df6
 	github.com/prometheus/client_golang v1.9.0
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.18.1-0.20210305175002-2a23014b3b39
+	github.com/prometheus/prometheus v1.8.2-0.20210217141258-a6be548dbc17 // indirect
 	github.com/robfig/cron v0.0.0-20180505203441-b41be1df6967
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/russellhaering/goxmldsig v1.1.0
@@ -80,7 +83,7 @@ require (
 	github.com/yudai/gojsondiff v1.0.0
 	go.opentelemetry.io/collector v0.22.0
 	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
-	golang.org/x/net v0.0.0-20210119194325-5f4716e94777
+	golang.org/x/net v0.0.0-20210226172049-e18ecbb05110
 	golang.org/x/oauth2 v0.0.0-20210220000619-9bb904979d93
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 	golang.org/x/time v0.0.0-20201208040808-7e3f01d25324

go.sum

@@ -129,6 +129,7 @@ github.com/NYTimes/gziphandler v1.1.1/go.mod h1:n/CVRwUEOgIxrgPvAQhUUr9oeUtvrhMo
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5/go.mod h1:lmUJ/7eu/Q8D7ML55dXQrVaamCz2vxCfdQBasLZfHKk=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/OneOfOne/xxhash v1.2.5/go.mod h1:eZbhyaAYD41SGSSsnmcpxVoRiQ/MPUTjUdIIOT9Um7Q=
+github.com/OneOfOne/xxhash v1.2.6 h1:U68crOE3y3MPttCMQGywZOLrTeF5HHJ3/vDBCJn9/bA=
 github.com/OneOfOne/xxhash v1.2.6/go.mod h1:eZbhyaAYD41SGSSsnmcpxVoRiQ/MPUTjUdIIOT9Um7Q=
 github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
@@ -174,6 +175,7 @@ github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
 github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878/go.mod h1:3AMJUQhVx52RsWOnlkpikZr01T/yAVN2gn0861vByNg=
 github.com/armon/go-metrics v0.3.0/go.mod h1:zXjbSimjXTd7vOpY8B0/2LpvNvDoXBuplAD+gJD3GYs=
+github.com/armon/go-metrics v0.3.3 h1:a9F4rlj7EWWrbj7BYw8J8+x+ZZkJeqzNyRk8hdPF+ro=
 github.com/armon/go-metrics v0.3.3/go.mod h1:4O98XIr/9W0sxpJ8UaYkvjk10Iff7SnFrb4QAOwNTFc=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
@@ -236,8 +238,11 @@ github.com/c2h5oh/datasize v0.0.0-20200112174442-28bbd4740fee/go.mod h1:S/7n9cop
 github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
 github.com/cenkalti/backoff v0.0.0-20181003080854-62661b46c409/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/cenkalti/backoff v1.0.0/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
+github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4=
 github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
+github.com/cenkalti/backoff/v4 v4.0.2 h1:JIufpQLbh4DkbQoii76ItQIUFzevQSqOLZca4eamEDs=
 github.com/cenkalti/backoff/v4 v4.0.2/go.mod h1:eEew/i+1Q6OrCDZh3WiXYv3+nJwBASZ8Bog/87DQnVg=
+github.com/cenkalti/backoff/v4 v4.1.0 h1:c8LkOFQTzuO0WBM/ae5HdGQuZPfPxp7lqBRwQRm4fSc=
 github.com/cenkalti/backoff/v4 v4.1.0/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/census-instrumentation/opencensus-proto v0.3.0/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -494,6 +499,8 @@ github.com/go-openapi/errors v0.19.7/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpX
 github.com/go-openapi/errors v0.19.8/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
 github.com/go-openapi/errors v0.19.9 h1:9SnKdGhiPZHF3ttwFMiCBEb8jQ4IDdrK+5+a0oTygA4=
 github.com/go-openapi/errors v0.19.9/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
+github.com/go-openapi/errors v0.20.0 h1:Sxpo9PjEHDzhs3FbnGNonvDgWcMW2U7wGTcDDSFSceM=
+github.com/go-openapi/errors v0.20.0/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
 github.com/go-openapi/jsonpointer v0.0.0-20160704185906-46af16f9f7b1/go.mod h1:+35s3my2LFTysnkMfxsJBAMHj/DoqoB9knIWoYG/Vk0=
 github.com/go-openapi/jsonpointer v0.17.0/go.mod h1:cOnomiV+CVVwFLk0A/MExoFMjwdsUdVpsRhURCKh+3M=
 github.com/go-openapi/jsonpointer v0.17.2/go.mod h1:cOnomiV+CVVwFLk0A/MExoFMjwdsUdVpsRhURCKh+3M=
@@ -534,6 +541,8 @@ github.com/go-openapi/runtime v0.19.15/go.mod h1:dhGWCTKRXlAfGnQG0ONViOZpjfg0m2g
 github.com/go-openapi/runtime v0.19.16/go.mod h1:5P9104EJgYcizotuXhEuUrzVc+j1RiSjahULvYmlv98=
 github.com/go-openapi/runtime v0.19.24 h1:TqagMVlRAOTwllE/7hNKx6rQ10O6T8ZzeJdMjSTKaD4=
 github.com/go-openapi/runtime v0.19.24/go.mod h1:Lm9YGCeecBnUUkFTxPC4s1+lwrkJ0pthx8YvyjCfkgk=
+github.com/go-openapi/runtime v0.19.26 h1:K/6PoVNj5WJXUnMk+VEbELeXjtBkCS1UxTDa04tdXE0=
+github.com/go-openapi/runtime v0.19.26/go.mod h1:BvrQtn6iVb2QmiVXRsFAm6ZCAZBpbVKFfN6QWCp582M=
 github.com/go-openapi/spec v0.0.0-20160808142527-6aced65f8501/go.mod h1:J8+jY1nAiCcj+friV/PDoE1/3eeccG9LYBs0tYvLOWc=
 github.com/go-openapi/spec v0.17.0/go.mod h1:XkF/MOi14NmjsfZ8VtAKf8pIlbZzyoTvZsdfssdxcBI=
 github.com/go-openapi/spec v0.17.2/go.mod h1:XkF/MOi14NmjsfZ8VtAKf8pIlbZzyoTvZsdfssdxcBI=
@@ -556,7 +565,6 @@ github.com/go-openapi/strfmt v0.19.0/go.mod h1:+uW+93UVvGGq2qGaZxdDeJqSAqBqBdl+Z
 github.com/go-openapi/strfmt v0.19.2/go.mod h1:0yX7dbo8mKIvc3XSKp7MNfxw4JytCfCD6+bY1AVL9LU=
 github.com/go-openapi/strfmt v0.19.3/go.mod h1:0yX7dbo8mKIvc3XSKp7MNfxw4JytCfCD6+bY1AVL9LU=
 github.com/go-openapi/strfmt v0.19.4/go.mod h1:eftuHTlB/dI8Uq8JJOyRlieZf+WkkxUuk0dgdHXr2Qk=
-github.com/go-openapi/strfmt v0.19.5 h1:0utjKrw+BAh8s57XE9Xz8DUBsVvPmRUB6styvl9wWIM=
 github.com/go-openapi/strfmt v0.19.5/go.mod h1:eftuHTlB/dI8Uq8JJOyRlieZf+WkkxUuk0dgdHXr2Qk=
 github.com/go-openapi/strfmt v0.19.11/go.mod h1:UukAYgTaQfqJuAFlNxxMWNvMYiwiXtLsF2VwmoFtbtc=
 github.com/go-openapi/strfmt v0.20.0 h1:l2omNtmNbMc39IGptl9BuXBEKcZfS8zjrTsPKTiJiDM=
@@ -578,7 +586,6 @@ github.com/go-openapi/validate v0.17.2/go.mod h1:Uh4HdOzKt19xGIGm1qHf/ofbX1YQ4Y+
 github.com/go-openapi/validate v0.18.0/go.mod h1:Uh4HdOzKt19xGIGm1qHf/ofbX1YQ4Y+MYsct2VUrAJ4=
 github.com/go-openapi/validate v0.19.2/go.mod h1:1tRCw7m3jtI8eNWEEliiAqUIcBztB2KDnRCRMUi7GTA=
 github.com/go-openapi/validate v0.19.3/go.mod h1:90Vh6jjkTn+OT1Eefm0ZixWNFjhtOH7vS9k0lo6zwJo=
-github.com/go-openapi/validate v0.19.8 h1:YFzsdWIDfVuLvIOF+ZmKjVg1MbPJ1QgY9PihMwei1ys=
 github.com/go-openapi/validate v0.19.8/go.mod h1:8DJv2CVJQ6kGNpFW6eV9N3JviE1C85nY1c2z52x1Gk4=
 github.com/go-openapi/validate v0.19.10/go.mod h1:RKEZTUWDkxKQxN2jDT7ZnZi2bhZlbNMAuKvKB+IaGx8=
 github.com/go-openapi/validate v0.19.12/go.mod h1:Rzou8hA/CBw8donlS6WNEUQupNvUZ0waH08tGe6kAQ4=
@@ -634,6 +641,8 @@ github.com/gocql/gocql v0.0.0-20200526081602-cd04bd7f22a7/go.mod h1:DL0ekTmBSTdl
 github.com/godbus/dbus v0.0.0-20190402143921-271e53dc4968/go.mod h1:/YcGZj5zSblfDWMMoOzV4fas9FZnQYTkDnsGvmh2Grw=
 github.com/gofrs/flock v0.7.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
 github.com/gofrs/uuid v3.3.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
+github.com/gofrs/uuid v4.0.0+incompatible h1:1SD/1F5pU8p29ybwgQSwpQk+mwdRrXCYuPhW6m+TnJw=
+github.com/gofrs/uuid v4.0.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
 github.com/gogo/googleapis v1.1.0/go.mod h1:gf4bu3Q80BeJ6H1S1vYPm8/ELATdvryBaNFGgqEef3s=
 github.com/gogo/googleapis v1.3.0 h1:M695OaDJ5ipWvDPcoAg/YL9c3uORAegkEfBqTQF/fTQ=
 github.com/gogo/googleapis v1.3.0/go.mod h1:d+q1s/xVJxZGKWwC/6UfPIF33J+G1Tq4GYv9Y+Tg/EU=
@@ -701,6 +710,7 @@ github.com/gomodule/redigo v2.0.0+incompatible h1:K/R+8tc58AaqLkqG2Ol3Qk+DR/TlNu
 github.com/gomodule/redigo v2.0.0+incompatible/go.mod h1:B4C85qUVwatsJoIUNIfCRsp7qO0iAmpGFZ4EELWSbC4=
 github.com/google/btree v0.0.0-20180124185431-e89373fe6b4a/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
+github.com/google/btree v1.0.0 h1:0udJVsspx3VBr5FwtLhQQtuAsVc79tTq0ocGIPAU6qo=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/flatbuffers v1.11.0 h1:O7CEyB8Cb3/DmtxODGtLHcEvpr81Jm5qLg/hsHnxA2A=
 github.com/google/flatbuffers v1.11.0/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
@@ -839,6 +849,7 @@ github.com/hashicorp/consul/sdk v0.4.0/go.mod h1:fY08Y9z5SvJqevyZNy6WWPXiG3KwBPA
 github.com/hashicorp/consul/sdk v0.5.0/go.mod h1:fY08Y9z5SvJqevyZNy6WWPXiG3KwBPAvlcdx16zZ0fM=
 github.com/hashicorp/consul/sdk v0.6.0/go.mod h1:fY08Y9z5SvJqevyZNy6WWPXiG3KwBPAvlcdx16zZ0fM=
 github.com/hashicorp/consul/sdk v0.7.0/go.mod h1:fY08Y9z5SvJqevyZNy6WWPXiG3KwBPAvlcdx16zZ0fM=
+github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/go-cleanhttp v0.5.0/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
 github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
@@ -851,10 +862,13 @@ github.com/hashicorp/go-hclog v0.15.0 h1:qMuK0wxsoW4D0ddCCYwPSTm4KQv1X1ke3WmPWZ0
 github.com/hashicorp/go-hclog v0.15.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
 github.com/hashicorp/go-immutable-radix v1.0.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
 github.com/hashicorp/go-immutable-radix v1.1.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
+github.com/hashicorp/go-immutable-radix v1.2.0 h1:l6UW37iCXwZkZoAbEYnptSHVE/cQ5bOTPYG5W3vf9+8=
 github.com/hashicorp/go-immutable-radix v1.2.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
 github.com/hashicorp/go-msgpack v0.5.3/go.mod h1:ahLV/dePpqEmjfWmKiqvPkv/twdG7iPBM1vqhUKIvfM=
+github.com/hashicorp/go-msgpack v0.5.5 h1:i9R9JSrqIz0QVLz3sz+i3YJdT7TTSLcfLLzJi9aZTuI=
 github.com/hashicorp/go-msgpack v0.5.5/go.mod h1:ahLV/dePpqEmjfWmKiqvPkv/twdG7iPBM1vqhUKIvfM=
 github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
+github.com/hashicorp/go-multierror v1.1.0 h1:B9UzwGQJehnUY1yNrnwREHc3fGbC2xefo8g4TbElacI=
 github.com/hashicorp/go-multierror v1.1.0/go.mod h1:spPvp8C1qA32ftKqdAHm4hHTbPw+vmowP0z+KUhOZdA=
 github.com/hashicorp/go-plugin v1.0.1/go.mod h1:++UyYGoz3o5w9ZzAdZxtQKrWWP+iqPBn3cQptSMzBuY=
 github.com/hashicorp/go-plugin v1.2.2/go.mod h1:F9eH4LrE/ZsRdbwhfjs9k9HoDUwAHnYtXdgmf1AVNs0=
@@ -865,10 +879,12 @@ github.com/hashicorp/go-rootcerts v1.0.0/go.mod h1:K6zTfqpRlCUIjkwsN4Z+hiSfzSTQa
 github.com/hashicorp/go-rootcerts v1.0.1/go.mod h1:pqUvnprVnM5bf7AOirdbb01K4ccR319Vf4pU3K5EGc8=
 github.com/hashicorp/go-rootcerts v1.0.2/go.mod h1:pqUvnprVnM5bf7AOirdbb01K4ccR319Vf4pU3K5EGc8=
 github.com/hashicorp/go-sockaddr v1.0.0/go.mod h1:7Xibr9yA9JjQq1JpNB2Vw7kxv8xerXegt+ozgdvDeDU=
+github.com/hashicorp/go-sockaddr v1.0.2 h1:ztczhD1jLxIRjVejw8gFomI1BQZOe2WoVOu0SyteCQc=
 github.com/hashicorp/go-sockaddr v1.0.2/go.mod h1:rB4wwRAUzs07qva3c5SdrY/NEtAUjGlgmH/UkBUC97A=
 github.com/hashicorp/go-syslog v1.0.0/go.mod h1:qPfqrKkXGihmCqbJM2mZgkZGvKG1dFdvsLplgctolz4=
 github.com/hashicorp/go-uuid v1.0.0/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/hashicorp/go-uuid v1.0.1/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
+github.com/hashicorp/go-uuid v1.0.2 h1:cfejS+Tpcp13yd5nYHWDI6qVCny6wyX2Mt5SGur2IGE=
 github.com/hashicorp/go-uuid v1.0.2/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/hashicorp/go-version v1.2.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
 github.com/hashicorp/go-version v1.2.1 h1:zEfKbn2+PDgroKdiOzqiE8rsmLqU2uwi5PB5pBJ3TkI=
@@ -877,6 +893,7 @@ github.com/hashicorp/go.net v0.0.1/go.mod h1:hjKkEWcCURg++eb33jQU7oqQcI9XDCnUzHA
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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@@ -886,6 +903,7 @@ github.com/hashicorp/memberlist v0.1.3/go.mod h1:ajVTdAv/9Im8oMAAj5G31PhhMCZJV2p
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@@ -1047,6 +1065,7 @@ github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
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@@ -1146,6 +1165,7 @@ github.com/miekg/dns v1.1.26/go.mod h1:bPDLeHnStXmXAq1m/Ch/hvfNHr14JKNPMBo3VZKju
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@@ -1273,6 +1293,7 @@ github.com/openzipkin/zipkin-go v0.2.5/go.mod h1:KpXfKdgRDnnhsxw4pNIH9Md5lyFqKUa
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@@ -1313,11 +1334,13 @@ github.com/pquerna/cachecontrol v0.0.0-20200819021114-67c6ae64274f/go.mod h1:hoL
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@@ -1359,7 +1382,6 @@ github.com/prometheus/common v0.12.0/go.mod h1:U+gB1OBLb1lF3O42bTCL+FK18tX9Oar16
 github.com/prometheus/common v0.14.0/go.mod h1:U+gB1OBLb1lF3O42bTCL+FK18tX9Oar16Clt/msog/s=
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-github.com/prometheus/common v0.18.0 h1:WCVKW7aL6LEe1uryfI9dnEc2ZqNB1Fn0ok930v0iL1Y=
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@@ -1435,9 +1457,11 @@ github.com/sanity-io/litter v1.2.0/go.mod h1:JF6pZUFgu2Q0sBZ+HSV35P8TVPI1TTzEwyu
 github.com/santhosh-tekuri/jsonschema v1.2.4/go.mod h1:TEAUOeZSmIxTTuHatJzrvARHiuO9LYd+cIxzgEHCQI4=
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+github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529 h1:nn5Wsu0esKSJiIVhscUtVbo7ada43DJhG55ua/hjS5I=
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@@ -1453,12 +1477,14 @@ github.com/shirou/gopsutil v3.20.12-0.20201210134652-afe0c04c5d5a+incompatible/g
 github.com/shirou/gopsutil v3.21.2+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
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@@ -1482,6 +1508,7 @@ github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4k
 github.com/sony/gobreaker v0.4.1/go.mod h1:ZKptC7FHNvhBz7dN2LGjPVBz2sZJmc0/PkyDJOjmxWY=
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 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
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@@ -1631,7 +1658,6 @@ go.mongodb.org/mongo-driver v1.1.0/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qL
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-go.mongodb.org/mongo-driver v1.3.2 h1:IYppNjEV/C+/3VPbhHVxQ4t04eVW0cLp0/pNdW++6Ug=
 go.mongodb.org/mongo-driver v1.3.2/go.mod h1:MSWZXKOynuguX+JSvwP8i+58jYCXxbia8HS3gZBapIE=
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@@ -1815,6 +1841,8 @@ golang.org/x/net v0.0.0-20201209123823-ac852fbbde11/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20201224014010-6772e930b67b/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210119194325-5f4716e94777 h1:003p0dJM77cxMSyCPFphvZf/Y5/NXf5fzg6ufd1/Oew=
 golang.org/x/net v0.0.0-20210119194325-5f4716e94777/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 h1:qWPm9rbaAMKs8Bq/9LRpbMqxWRVUAQwMI9fVrssnTfw=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181106182150-f42d05182288/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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@@ -1826,7 +1854,6 @@ golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43/go.mod h1:KelEdhl1UZF7XfJ
 golang.org/x/oauth2 v0.0.0-20201109201403-9fd604954f58/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210210192628-66670185b0cd/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
-golang.org/x/oauth2 v0.0.0-20210218202405-ba52d332ba99 h1:5vD4XjIc0X5+kHZjx4UecYdjA6mJo+XXNoaW0EjU5Os=
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 golang.org/x/oauth2 v0.0.0-20210220000619-9bb904979d93 h1:alLDrZkL34Y2bnGHfvC1CYBRBXCXgx8AC2vY4MRtYX4=
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@@ -1841,7 +1868,6 @@ golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200930132711-30421366ff76/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20201207232520-09787c993a3a h1:DcqTD9SDLc+1P/r1EmRBwnVsrOwW+kk2vWf9n+1sGhs=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -1944,7 +1970,6 @@ golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210217105451-b926d437f341/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210220050731-9a76102bfb43/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210225134936-a50acf3fe073 h1:8qxJSnu+7dRq6upnbntrmriWByIakBuct5OM/MdQC1M=
 golang.org/x/sys v0.0.0-20210225134936-a50acf3fe073/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b h1:ggRgirZABFolTmi3sn6Ivd9SipZwLedQ5wR0aAKnFxU=
 golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -2100,7 +2125,6 @@ google.golang.org/api v0.32.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ
 google.golang.org/api v0.35.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/api v0.36.0/go.mod h1:+z5ficQTmoYpPn8LCUNVpK5I7hwkpjbcgqA7I34qYtE=
 google.golang.org/api v0.39.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjRCQ8=
-google.golang.org/api v0.40.0 h1:uWrpz12dpVPn7cojP82mk02XDgTJLDPc2KbVTxrWb4A=
 google.golang.org/api v0.40.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjRCQ8=
 google.golang.org/api v0.41.0 h1:12aHIhhQCpWtd3Rcp2WwbboB5W72tJHcjzyA9MCoHAw=
 google.golang.org/api v0.41.0/go.mod h1:RkxM5lITDfTzmyKFPt+wGrCJbVfniCr2ool8kTBzRTU=
@@ -2167,7 +2191,6 @@ google.golang.org/genproto v0.0.0-20201214200347-8c77b98c765d/go.mod h1:FWY/as6D
 google.golang.org/genproto v0.0.0-20210108203827-ffc7fda8c3d7/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20210222152913-aa3ee6e6a81c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20210226172003-ab064af71705/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20210302174412-5ede27ff9881 h1:SYuy3hIRsBIROE0aZwsJZOEJNC/n9/p0FmLEU9C31AE=
 google.golang.org/genproto v0.0.0-20210302174412-5ede27ff9881/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20210303154014-9728d6b83eeb h1:hcskBH5qZCOa7WpTUFUFvoebnSFZBYpjykLtjIp9DVk=
 google.golang.org/genproto v0.0.0-20210303154014-9728d6b83eeb/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=

pkg/services/ngalert/notifier/alert_reception.go

@@ -0,0 +1,108 @@
+package notifier
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-kit/kit/log"
+	"github.com/prometheus/alertmanager/api/v2/models"
+	"github.com/prometheus/alertmanager/notify"
+	"github.com/prometheus/alertmanager/provider"
+	"github.com/prometheus/alertmanager/provider/mem"
+	"github.com/prometheus/alertmanager/types"
+	"github.com/prometheus/common/model"
+)
+
+type PostableAlert struct {
+	models.PostableAlert
+
+	// List of receiver names to sent alert to
+	Receivers []string `json:"receivers"`
+}
+
+type AlertProvider struct {
+	provider.Alerts
+	logger log.Logger
+
+	// TODO(codesome): This stage is temporary to get code out quickly.
+	// Eventually, the alerts meant directly for receivers and not routing
+	// will be stored in memory and provided via an iterator, for example
+	// GetPendingLegacy() AlertIterator, and the external code will use this
+	// iterator to send to the stage.
+	stage notify.Stage
+}
+
+func NewAlertProvider(s notify.Stage, m types.Marker, l log.Logger) (*AlertProvider, error) {
+	alerts, err := mem.NewAlerts(context.Background(), m, 30*time.Minute, l)
+	if err != nil {
+		return nil, err
+	}
+
+	return &AlertProvider{
+		Alerts: alerts,
+		stage:  s,
+		logger: l,
+	}, nil
+}
+
+func (ap *AlertProvider) PutPostableAlert(alerts ...*PostableAlert) error {
+	var alertsWithReceivers []*PostableAlert
+	var alertsWithoutReceivers []*types.Alert
+	for _, a := range alerts {
+		if len(a.Receivers) > 0 {
+			alertsWithReceivers = append(alertsWithReceivers, a)
+		} else {
+			alertsWithoutReceivers = append(alertsWithoutReceivers, alertForDelivery(a))
+		}
+	}
+
+	// Without receiver names, alerts go through routing.
+	if err := ap.Alerts.Put(alertsWithoutReceivers...); err != nil {
+		return err
+	}
+
+	if len(alertsWithReceivers) == 0 {
+		return nil
+	}
+
+	// Group alerts with receivers based on the receiver names.
+	groupedAlerts := make(map[string][]*types.Alert)
+	for _, a := range alertsWithReceivers {
+		for _, recv := range a.Receivers {
+			groupedAlerts[recv] = append(groupedAlerts[recv], alertForDelivery(a))
+		}
+	}
+
+	for recv, alerts := range groupedAlerts {
+		ctx := notify.WithReceiverName(context.Background(), recv)
+		_, _, err := ap.stage.Exec(ctx, ap.logger, alerts...)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func alertForDelivery(a *PostableAlert) *types.Alert {
+	lbls := model.LabelSet{}
+	annotations := model.LabelSet{}
+	for k, v := range a.Labels {
+		lbls[model.LabelName(k)] = model.LabelValue(v)
+	}
+	for k, v := range a.Annotations {
+		annotations[model.LabelName(k)] = model.LabelValue(v)
+	}
+
+	return &types.Alert{
+		Alert: model.Alert{
+			Labels:       lbls,
+			Annotations:  annotations,
+			StartsAt:     time.Time(a.StartsAt),
+			EndsAt:       time.Time(a.EndsAt),
+			GeneratorURL: a.GeneratorURL.String(),
+		},
+		UpdatedAt: time.Time{}, // TODO(codesome) what should this be?
+		Timeout:   false,       // TODO(codesome).
+	}
+}

pkg/services/ngalert/notifier/alert_reception_test.go

@@ -0,0 +1,129 @@
+package notifier
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/go-kit/kit/log"
+	"github.com/prometheus/alertmanager/api/v2/models"
+	"github.com/prometheus/alertmanager/notify"
+	"github.com/prometheus/alertmanager/provider"
+	"github.com/prometheus/alertmanager/types"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/common/model"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAlertProvider_PutPostableAlert(t *testing.T) {
+	marker := types.NewMarker(prometheus.DefaultRegisterer)
+	stage := &mockStage{alerts: make(map[string][]*types.Alert)}
+	provider := &mockAlertProvider{}
+
+	ap, err := NewAlertProvider(stage, marker, log.NewNopLogger())
+	require.NoError(t, err)
+	ap.Alerts = provider
+
+	postableAlerts := []*PostableAlert{
+		{
+			// Goes through routing since no receiver.
+			PostableAlert: models.PostableAlert{
+				Annotations: models.LabelSet{"msg": "AlertOne annotation"},
+				Alert: models.Alert{
+					Labels: models.LabelSet{"alertname": "AlertOne"},
+				},
+			},
+		}, {
+			// Goes directly through notification pipeling since there is receiver.
+			PostableAlert: models.PostableAlert{
+				Annotations: models.LabelSet{"msg": "AlertTwo annotation"},
+				Alert: models.Alert{
+					Labels: models.LabelSet{"alertname": "AlertTwo"},
+				},
+			},
+			Receivers: []string{"recv1", "recv2"},
+		}, {
+			// Goes directly through notification pipeling since there is receiver.
+			PostableAlert: models.PostableAlert{
+				Annotations: models.LabelSet{"msg": "AlertThree annotation"},
+				Alert: models.Alert{
+					Labels: models.LabelSet{"alertname": "AlertThree"},
+				},
+			},
+			Receivers: []string{"recv2", "recv3"},
+		},
+	}
+
+	require.NoError(t, ap.PutPostableAlert(postableAlerts...))
+
+	// Alerts that should be sent for routing.
+	expProviderAlerts := []*types.Alert{
+		{
+			Alert: model.Alert{
+				Annotations: model.LabelSet{"msg": "AlertOne annotation"},
+				Labels:      model.LabelSet{"alertname": "AlertOne"},
+			},
+		},
+	}
+	require.Equal(t, expProviderAlerts, provider.alerts)
+
+	// Alerts that should go directly to the notification pipeline.
+	expPipelineAlerts := map[string][]*types.Alert{
+		"recv1": {
+			{
+				Alert: model.Alert{
+					Annotations: model.LabelSet{"msg": "AlertTwo annotation"},
+					Labels:      model.LabelSet{"alertname": "AlertTwo"},
+				},
+			},
+		},
+		"recv2": {
+			{
+				Alert: model.Alert{
+					Annotations: model.LabelSet{"msg": "AlertTwo annotation"},
+					Labels:      model.LabelSet{"alertname": "AlertTwo"},
+				},
+			}, {
+				Alert: model.Alert{
+					Annotations: model.LabelSet{"msg": "AlertThree annotation"},
+					Labels:      model.LabelSet{"alertname": "AlertThree"},
+				},
+			},
+		},
+		"recv3": {
+			{
+				Alert: model.Alert{
+					Annotations: model.LabelSet{"msg": "AlertThree annotation"},
+					Labels:      model.LabelSet{"alertname": "AlertThree"},
+				},
+			},
+		},
+	}
+	require.Equal(t, expPipelineAlerts, stage.alerts)
+}
+
+type mockAlertProvider struct {
+	alerts []*types.Alert
+}
+
+func (a *mockAlertProvider) Subscribe() provider.AlertIterator           { return nil }
+func (a *mockAlertProvider) GetPending() provider.AlertIterator          { return nil }
+func (a *mockAlertProvider) Get(model.Fingerprint) (*types.Alert, error) { return nil, nil }
+
+func (a *mockAlertProvider) Put(alerts ...*types.Alert) error {
+	a.alerts = append(a.alerts, alerts...)
+	return nil
+}
+
+type mockStage struct {
+	alerts map[string][]*types.Alert
+}
+
+func (s *mockStage) Exec(ctx context.Context, _ log.Logger, alerts ...*types.Alert) (context.Context, []*types.Alert, error) {
+	recv, ok := notify.ReceiverName(ctx)
+	if !ok {
+		return ctx, nil, errors.New("receiver name not found")
+	}
+	s.alerts[recv] = append(s.alerts[recv], alerts...)
+	return ctx, nil, nil
+}

pkg/services/ngalert/notifier/alertmanager.go

@@ -0,0 +1,275 @@
+package notifier
+
+import (
+	"context"
+	"path/filepath"
+	"sort"
+	"sync"
+	"time"
+
+	gokit_log "github.com/go-kit/kit/log"
+	"github.com/pkg/errors"
+	"github.com/prometheus/alertmanager/config"
+	"github.com/prometheus/alertmanager/dispatch"
+	"github.com/prometheus/alertmanager/nflog"
+	"github.com/prometheus/alertmanager/nflog/nflogpb"
+	"github.com/prometheus/alertmanager/notify"
+	"github.com/prometheus/alertmanager/pkg/labels"
+	"github.com/prometheus/alertmanager/silence"
+	"github.com/prometheus/alertmanager/silence/silencepb"
+	"github.com/prometheus/alertmanager/types"
+	"github.com/prometheus/client_golang/prometheus"
+
+	"github.com/grafana/grafana/pkg/infra/log"
+	"github.com/grafana/grafana/pkg/registry"
+	"github.com/grafana/grafana/pkg/setting"
+)
+
+type Alertmanager struct {
+	logger log.Logger
+
+	// notificationLog keeps tracks of which notifications we've fired already.
+	notificationLog *nflog.Log
+	// silences keeps the track of which notifications we should not fire due to user configuration.
+	silences   *silence.Silences
+	marker     types.Marker
+	alerts     *AlertProvider
+	dispatcher *dispatch.Dispatcher
+
+	wg sync.WaitGroup
+}
+
+type WithReceiverStage struct {
+}
+
+func (s *WithReceiverStage) Exec(ctx context.Context, l gokit_log.Logger, alerts ...*types.Alert) (context.Context, []*types.Alert, error) {
+	//TODO: Alerts with a receiver should be handled here.
+	return ctx, nil, nil
+}
+
+func init() {
+	registry.RegisterService(&Alertmanager{})
+}
+
+func (am *Alertmanager) IsDisabled() bool {
+	return !setting.AlertingEnabled || !setting.ExecuteAlerts
+}
+
+func (am *Alertmanager) Init() error {
+	am.logger = log.New("alertmanager")
+
+	return nil
+}
+
+func (am *Alertmanager) Run(ctx context.Context) error {
+	//TODO: Speak with David Parrot wrt to the marker, we'll probably need our own.
+	am.marker = types.NewMarker(prometheus.DefaultRegisterer)
+
+	var err error
+	am.alerts, err = NewAlertProvider(&WithReceiverStage{}, am.marker, gokit_log.NewNopLogger())
+	if err != nil {
+		return errors.Wrap(err, "failed to initialize alerting storage component")
+	}
+
+	am.silences, err = silence.New(silence.Options{
+		SnapshotFile: filepath.Join("dir", "silences"), //TODO: This is a setting
+		Retention:    time.Hour * 24,                   //TODO: This is also a setting
+	})
+	if err != nil {
+		return errors.Wrap(err, "unable to initialize the silencing component of alerting")
+	}
+
+	am.notificationLog, err = nflog.New(
+		nflog.WithRetention(time.Hour*24),                         //TODO: This is a setting.
+		nflog.WithSnapshot(filepath.Join("dir", "notifications")), //TODO: This should be a setting
+	)
+	if err != nil {
+		return errors.Wrap(err, "unable to initialize the notification log component of alerting")
+	}
+
+	{
+		// Now, let's put together our notification pipeline
+		receivers := buildIntegrationsMap()
+		routingStage := make(notify.RoutingStage, len(receivers))
+
+		silencingStage := notify.NewMuteStage(silence.NewSilencer(am.silences, am.marker, gokit_log.NewNopLogger()))
+		//TODO: We need to unify these receivers
+		for name := range receivers {
+			stage := createReceiverStage(name, receivers[name], waitFunc, am.notificationLog)
+			routingStage[name] = notify.MultiStage{silencingStage, stage}
+		}
+		am.dispatcher = dispatch.NewDispatcher(am.alerts, BuildRoutingConfiguration(), routingStage, am.marker, timeoutFunc, gokit_log.NewNopLogger(), nil)
+	}
+
+	am.wg.Add(1)
+	go am.dispatcher.Run()
+	return nil
+}
+
+// CreateAlerts receives the alerts and then sends them through the corresponding route based on whenever the alert has a receiver embedded or not
+func (am *Alertmanager) CreateAlerts(alerts ...*PostableAlert) error {
+	return am.alerts.PutPostableAlert(alerts...)
+}
+
+func (am *Alertmanager) ListSilences(matchers []*labels.Matcher) ([]types.Silence, error) {
+	pbsilences, _, err := am.silences.Query()
+	if err != nil {
+		return nil, errors.Wrap(err, "unable to query for the list of silences")
+	}
+	r := []types.Silence{}
+	for _, pbs := range pbsilences {
+		s, err := silenceFromProto(pbs)
+		if err != nil {
+			return nil, errors.Wrap(err, "unable to marshal silence")
+		}
+
+		sms := make(map[string]string)
+		for _, m := range s.Matchers {
+			sms[m.Name] = m.Value
+		}
+
+		if !matchFilterLabels(matchers, sms) {
+			continue
+		}
+
+		r = append(r, *s)
+	}
+
+	var active, pending, expired []types.Silence
+	for _, s := range r {
+		switch s.Status.State {
+		case types.SilenceStateActive:
+			active = append(active, s)
+		case types.SilenceStatePending:
+			pending = append(pending, s)
+		case types.SilenceStateExpired:
+			expired = append(expired, s)
+		}
+	}
+
+	sort.Slice(active, func(i int, j int) bool {
+		return active[i].EndsAt.Before(active[j].EndsAt)
+	})
+	sort.Slice(pending, func(i int, j int) bool {
+		return pending[i].StartsAt.Before(pending[j].EndsAt)
+	})
+	sort.Slice(expired, func(i int, j int) bool {
+		return expired[i].EndsAt.After(expired[j].EndsAt)
+	})
+
+	// Initialize silences explicitly to an empty list (instead of nil)
+	// So that it does not get converted to "null" in JSON.
+	silences := []types.Silence{}
+	silences = append(silences, active...)
+	silences = append(silences, pending...)
+	silences = append(silences, expired...)
+
+	return silences, nil
+}
+
+func (am *Alertmanager) GetSilence(silence *types.Silence)    {}
+func (am *Alertmanager) CreateSilence(silence *types.Silence) {}
+func (am *Alertmanager) DeleteSilence(silence *types.Silence) {}
+
+// createReceiverStage creates a pipeline of stages for a receiver.
+func createReceiverStage(name string, integrations []notify.Integration, wait func() time.Duration, notificationLog notify.NotificationLog) notify.Stage {
+	var fs notify.FanoutStage
+	for i := range integrations {
+		recv := &nflogpb.Receiver{
+			GroupName:   name,
+			Integration: integrations[i].Name(),
+			Idx:         uint32(integrations[i].Index()),
+		}
+		var s notify.MultiStage
+		s = append(s, notify.NewWaitStage(wait))
+		s = append(s, notify.NewDedupStage(&integrations[i], notificationLog, recv))
+		//TODO: This probably won't work w/o the metrics
+		s = append(s, notify.NewRetryStage(integrations[i], name, nil))
+		s = append(s, notify.NewSetNotifiesStage(notificationLog, recv))
+
+		fs = append(fs, s)
+	}
+	return fs
+}
+
+// BuildRoutingConfiguration produces an alertmanager-based routing configuration.
+func BuildRoutingConfiguration() *dispatch.Route {
+	var cfg *config.Config
+	return dispatch.NewRoute(cfg.Route, nil)
+}
+
+func buildIntegrationsMap() map[string][]notify.Integration {
+	return map[string][]notify.Integration{}
+}
+
+func waitFunc() time.Duration {
+	return setting.AlertingNotificationTimeout
+}
+
+func timeoutFunc(d time.Duration) time.Duration {
+	//TODO: What does MinTimeout means here?
+	if d < notify.MinTimeout {
+		d = notify.MinTimeout
+	}
+	return d + waitFunc()
+}
+
+// copied from the Alertmanager
+func silenceFromProto(s *silencepb.Silence) (*types.Silence, error) {
+	sil := &types.Silence{
+		ID:        s.Id,
+		StartsAt:  s.StartsAt,
+		EndsAt:    s.EndsAt,
+		UpdatedAt: s.UpdatedAt,
+		Status: types.SilenceStatus{
+			State: types.CalcSilenceState(s.StartsAt, s.EndsAt),
+		},
+		Comment:   s.Comment,
+		CreatedBy: s.CreatedBy,
+	}
+	for _, m := range s.Matchers {
+		var t labels.MatchType
+		switch m.Type {
+		case silencepb.Matcher_EQUAL:
+			t = labels.MatchEqual
+		case silencepb.Matcher_REGEXP:
+			t = labels.MatchRegexp
+		case silencepb.Matcher_NOT_EQUAL:
+			t = labels.MatchNotEqual
+		case silencepb.Matcher_NOT_REGEXP:
+			t = labels.MatchNotRegexp
+		}
+		matcher, err := labels.NewMatcher(t, m.Name, m.Pattern)
+		if err != nil {
+			return nil, err
+		}
+
+		sil.Matchers = append(sil.Matchers, matcher)
+	}
+
+	return sil, nil
+}
+
+func matchFilterLabels(matchers []*labels.Matcher, sms map[string]string) bool {
+	for _, m := range matchers {
+		v, prs := sms[m.Name]
+		switch m.Type {
+		case labels.MatchNotRegexp, labels.MatchNotEqual:
+			if m.Value == "" && prs {
+				continue
+			}
+			if !m.Matches(v) {
+				return false
+			}
+		default:
+			if m.Value == "" && !prs {
+				continue
+			}
+			if !m.Matches(v) {
+				return false
+			}
+		}
+	}
+
+	return true
+}

pkg/services/ngalert/notifier/settings.go

@@ -0,0 +1 @@
+package notifier