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[[cluster-nodes-info]]
== Nodes Info
The cluster nodes info API allows to retrieve one or more (or all) of
the cluster nodes information.
[source,js]
--------------------------------------------------
curl -XGET 'http://localhost:9200/_nodes'
curl -XGET 'http://localhost:9200/_nodes/nodeId1,nodeId2'
--------------------------------------------------
The first command retrieves information of all the nodes in the cluster.
The second command selectively retrieves nodes information of only
`nodeId1` and `nodeId2`. All the nodes selective options are explained
<<cluster-nodes,here>>.
By default, it just returns all attributes and core settings for a node.
It also allows to get only information on `settings`, `os`, `process`, `jvm`,
`thread_pool`, `network`, `transport`, `http` and `plugin`:
[source,js]
--------------------------------------------------
curl -XGET 'http://localhost:9200/_nodes/process'
curl -XGET 'http://localhost:9200/_nodes/_all/process'
curl -XGET 'http://localhost:9200/_nodes/nodeId1,nodeId2/jvm,process'
# same as above
curl -XGET 'http://localhost:9200/_nodes/nodeId1,nodeId2/info/jvm,process'
curl -XGET 'http://localhost:9200/_nodes/nodeId1,nodeId2/_all
--------------------------------------------------
The `all` flag can be set to return all the information - or you can simply omit it.
`plugin` - if set, the result will contain details about the loaded
plugins per node:
* `name`: plugin name
* `description`: plugin description if any
* `site`: `true` if the plugin is a site plugin
* `jvm`: `true` if the plugin is a plugin running in the JVM
* `url`: URL if the plugin is a site plugin
The result will look similar to:
[source,js]
--------------------------------------------------
{
"cluster_name" : "test-cluster-MacBook-Air-de-David.local",
"nodes" : {
"hJLXmY_NTrCytiIMbX4_1g" : {
"name" : "node4",
"transport_address" : "inet[/172.18.58.139:9303]",
"hostname" : "MacBook-Air-de-David.local",
"version" : "0.90.0.Beta2-SNAPSHOT",
"http_address" : "inet[/172.18.58.139:9203]",
"plugins" : [ {
"name" : "test-plugin",
"description" : "test-plugin description",
"site" : true,
"jvm" : false
}, {
"name" : "test-no-version-plugin",
"description" : "test-no-version-plugin description",
"site" : true,
"jvm" : false
}, {
"name" : "dummy",
"description" : "No description found for dummy.",
"url" : "/_plugin/dummy/",
"site" : false,
"jvm" : true
} ]
}
}
}
--------------------------------------------------
if your `plugin` data is subject to change use
`plugins.info_refresh_interval` to change or disable the caching
interval:
[source,js]
--------------------------------------------------
# Change cache to 20 seconds
plugins.info_refresh_interval: 20s
# Infinite cache
plugins.info_refresh_interval: -1
# Disable cache
plugins.info_refresh_interval: 0
--------------------------------------------------
|
