OpenSearch/docs/reference/cluster/nodes-usage.asciidoc

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[[cluster-nodes-usage]]
=== Nodes Feature Usage
Returns information on the usage of features.
[[cluster-nodes-usage-api-request]]
==== {api-request-title}
`GET /_nodes/usage` +
`GET /_nodes/<node_id>/usage` +
`GET /_nodes/usage/<metric>` +
`GET /_nodes/<node_id>/usage/<metric>`
[[cluster-nodes-usage-api-desc]]
==== {api-description-title}
The cluster nodes usage API allows you to retrieve information on the usage
of features for each node. All the nodes selective options are explained
<<cluster-nodes,here>>.
[[cluster-nodes-usage-api-path-params]]
==== {api-path-parms-title}
`<metric>`::
(Optional, string) Limits the information returned to the specific metrics.
A comma-separated list of the following options:
+
--
`_all`::
Returns all stats.
`rest_actions`::
Returns the REST actions classname with a count of the number of times
that action has been called on the node.
--
include::{docdir}/rest-api/common-parms.asciidoc[tag=node-id]
[[cluster-nodes-usage-api-query-params]]
==== {api-query-parms-title}
include::{docdir}/rest-api/common-parms.asciidoc[tag=timeoutparms]
[[cluster-nodes-usage-api-example]]
==== {api-examples-title}
Rest action example:
[source,js]
--------------------------------------------------
GET _nodes/usage
--------------------------------------------------
// CONSOLE
// TEST[setup:node]
The API returns the following response:
[source,console-result]
--------------------------------------------------
{
"_nodes": {
"total": 1,
"successful": 1,
"failed": 0
},
"cluster_name": "my_cluster",
"nodes": {
"pQHNt5rXTTWNvUgOrdynKg": {
"timestamp": 1492553961812, <1>
"since": 1492553906606, <2>
"rest_actions": {
"org.elasticsearch.rest.action.admin.cluster.RestNodesUsageAction": 1,
"org.elasticsearch.rest.action.admin.indices.RestCreateIndexAction": 1,
"org.elasticsearch.rest.action.document.RestGetAction": 1,
"org.elasticsearch.rest.action.search.RestSearchAction": 19, <3>
"org.elasticsearch.rest.action.admin.cluster.RestNodesInfoAction": 36
}
}
}
}
--------------------------------------------------
// TESTRESPONSE[s/"my_cluster"/$body.cluster_name/]
// TESTRESPONSE[s/"pQHNt5rXTTWNvUgOrdynKg"/\$node_name/]
// TESTRESPONSE[s/1492553961812/$body.$_path/]
// TESTRESPONSE[s/1492553906606/$body.$_path/]
// TESTRESPONSE[s/"rest_actions": [^}]+}/"rest_actions": $body.$_path/]
<1> Timestamp for when this nodes usage request was performed.
<2> Timestamp for when the usage information recording was started. This is
equivalent to the time that the node was started.
<3> Search action has been called 19 times for this node.