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[DOCS] Adds clarification to node roles (#61206) (#61211)

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István Zoltán Szabó 2020-08-17 16:15:53 +02:00 committed by GitHub
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docs/reference/modules/node.asciidoc
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@ -1,8 +1,8 @@
[[modules-node]]
=== Node
Any time that you start an instance of Elasticsearch, you are starting a _node_.
A collection of connected nodes is called a <<modules-cluster,cluster>>. If you
Any time that you start an instance of {es}, you are starting a _node_. A
collection of connected nodes is called a <<modules-cluster,cluster>>. If you
are running a single node of {es}, then you have a cluster of one node.
Every node in the cluster can handle <<modules-http,HTTP>> and
@ -22,6 +22,15 @@ TIP: As the cluster grows and in particular if you have large {ml} jobs or
{ctransforms}, consider separating dedicated master-eligible nodes from
dedicated data nodes, {ml} nodes, and {transform} nodes.
[[node-roles]]
==== Nore roles
You can define the roles of a node by setting `node.roles`. If you don't
configure this setting, then the node has the following roles by default:
`master`, `data`, `ingest`, `transform`, `ml`.
If you set node.roles, the node is assigned only the roles you specify.
<<master-node,Master-eligible node>>::
A node that has the `master` role (default), which makes it eligible to be