A tag is required to reuse Elasticsearch breaking changes in the Stack
Guide. To display properly, the breaking changes must use external
links rather than xrefs.
This PR correctly places those tags for reuse. It also replaces
several xrefs with external links for reuse.
In #39466 we removed all the settings in the `discovery.zen` namespace in 8.0
and documented their removal as a breaking change. Conspicuously absent from
the list of removed settings is the `discovery.zen.minimum_master_nodes`
setting, and there are two other omitted settings and a duplicated one too.
This commit fixes up these docs.
The use of node filters for excluding nodes from the voting configuration was
deprecated in #50836; this commit removes support for node filters in this API.
Closes#47990
Removes all traces of Zen1 from the code base. Some of these commits will also be backported to
7.0/7.x (#39470) as the cluster.coordination package was making use of some things in
discovery.zen and we want to keep 7.x as close as possible to master.
James Rodewig
debadair
David Turner
James Rodewig
Lisa Cawley
Yannick Welsch