[[cluster-state]]
== Cluster State

The cluster state API allows to get a comprehensive state information of
the whole cluster.

[source,js]
--------------------------------------------------
$ curl -XGET 'http://localhost:9200/_cluster/state'
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By default, the cluster state request is routed to the master node, to
ensure that the latest cluster state is returned.   
For debugging purposes, you can retrieve the cluster state local to a
particular node by adding `local=true` to the  query string.

[float]
=== Response Filters

It is possible to filter the cluster state response using the following
REST parameters:

`filter_nodes`::
	Set to `true` to filter out the `nodes` part of the
	response.

`filter_routing_table`:: 
	Set to `true` to filter out the `routing_table`
	part of the response.

`filter_metadata`::
	Set to `true` to filter out the `metadata` part of the
	response.

`filter_blocks`::
	Set to `true` to filter out the `blocks` part of the
	response.

`filter_indices`::
	When not filtering metadata, a comma separated list of
	indices to include in the response.

Example follows:

[source,js]
--------------------------------------------------
$ curl -XGET 'http://localhost:9200/_cluster/state?filter_nodes=true'
--------------------------------------------------