Jason Tedor 008296e2b6
Reorganize configuring Elasticsearch docs
This commit reorganizes some of the content in the configuring
Elasticsearch section of the docs. The changes are:
 - move JVM options out of system configuration into configuring
   Elasticsearch
 - move JVM options to its own page of the docs
 - move configuring the heap to important Elasticsearch settings
 - move configuring the heap to its own page of the docs
 - move all important settings to individual pages in the docs
 - remove bootstrap.memory_lock from important settings, this is covered
   in the swap section of system configuration

Relates #27755
2017-12-12 10:24:37 -05:00

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[[cluster.name]]
=== `cluster.name`
A node can only join a cluster when it shares its `cluster.name` with all the
other nodes in the cluster. The default name is `elasticsearch`, but you should
change it to an appropriate name which describes the purpose of the cluster.
[source,yaml]
--------------------------------------------------
cluster.name: logging-prod
--------------------------------------------------
Make sure that you don't reuse the same cluster names in different environments,
otherwise you might end up with nodes joining the wrong cluster.