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Nodes Info
editNodes Info
editThe cluster nodes info API allows to retrieve one or more (or all) of the cluster nodes information.
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
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
, transport
, http
and plugins
:
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.
Operating System information
editThe os
flag can be set to retrieve information that concern
the operating system:
-
os.refresh_interval_in_millis
- Refresh interval for the OS statistics
-
os.name
- Name of the operating system (ex: Linux, Windows, Mac OS X)
-
os.arch
- Name of the JVM architecture (ex: amd64, x86)
-
os.version
- Version of the operating system
-
os.available_processors
- Number of processors available to the Java virtual machine
-
os.allocated_processors
-
The number of processors actually used to calculate thread pool size. This number can be set
with the
processors
setting of a node and defaults to the number of processors reported by the OS. In both cases this number will never be larger than 32.
Process information
editThe process
flag can be set to retrieve information that concern
the current running process:
-
process.refresh_interval_in_millis
- Refresh interval for the process statistics
-
process.id
- Process identifier (PID)
-
process.mlockall
- Indicates if the process address space has been successfully locked in memory
Plugins information
editplugins
- 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:
{ "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 } ] } } }