Nodes Info
editNodes Info
editThe cluster nodes info API allows to retrieve one or more (or all) of the cluster nodes information.
GET /_nodes GET /_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:
-
build_hash - Short hash of the last git commit in this release.
-
host - The node’s host name.
-
ip - The node’s IP address.
-
name - The node’s name.
-
total_indexing_buffer - Total heap allowed to be used to hold recently indexed documents before they must be written to disk. This size is a shared pool across all shards on this node, and is controlled by Indexing Buffer settings.
-
total_indexing_buffer_in_bytes -
Same as
total_indexing_buffer, but expressed in bytes. -
transport_address - Host and port where transport HTTP connections are accepted.
-
version - Elasticsearch version running on this node.
It also allows to get only information on settings, os, process, jvm,
thread_pool, transport, http, plugins, ingest and indices:
# return just process GET /_nodes/process # same as above GET /_nodes/_all/process # return just jvm and process of only nodeId1 and nodeId2 GET /_nodes/nodeId1,nodeId2/jvm,process # same as above GET /_nodes/nodeId1,nodeId2/info/jvm,process # return all the information of only nodeId1 and nodeId2 GET /_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
processorssetting 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 installed plugins and modules per node:
GET /_nodes/plugins
The result will look similar to:
{
"_nodes": ...
"cluster_name": "elasticsearch",
"nodes": {
"USpTGYaBSIKbgSUJR2Z9lg": {
"name": "node-0",
"transport_address": "192.168.17:9300",
"host": "node-0.elastic.co",
"ip": "192.168.17",
"version": "{version}",
"build_flavor": "{build_flavor}",
"build_type": "zip",
"build_hash": "587409e",
"roles": [
"master",
"data",
"ingest"
],
"attributes": {},
"plugins": [
{
"name": "analysis-icu",
"version": "{version}",
"description": "The ICU Analysis plugin integrates Lucene ICU module into elasticsearch, adding ICU relates analysis components.",
"classname": "org.elasticsearch.plugin.analysis.icu.AnalysisICUPlugin",
"has_native_controller": false
},
{
"name": "ingest-geoip",
"version": "{version}",
"description": "Ingest processor that uses looksup geo data based on ip adresses using the Maxmind geo database",
"classname": "org.elasticsearch.ingest.geoip.IngestGeoIpPlugin",
"has_native_controller": false
},
{
"name": "ingest-user-agent",
"version": "{version}",
"description": "Ingest processor that extracts information from a user agent",
"classname": "org.elasticsearch.ingest.useragent.IngestUserAgentPlugin",
"has_native_controller": false
}
],
"modules": [
{
"name": "lang-painless",
"version": "{version}",
"description": "An easy, safe and fast scripting language for Elasticsearch",
"classname": "org.elasticsearch.painless.PainlessPlugin",
"has_native_controller": false
}
]
}
}
}
The following information are available for each plugin and module:
-
name: plugin name -
version: version of Elasticsearch the plugin was built for -
description: short description of the plugin’s purpose -
classname: fully-qualified class name of the plugin’s entry point -
has_native_controller: whether or not the plugin has a native controller process
Ingest information
editingest - if set, the result will contain details about the available
processors per node:
GET /_nodes/ingest
The result will look similar to:
{
"_nodes": ...
"cluster_name": "elasticsearch",
"nodes": {
"USpTGYaBSIKbgSUJR2Z9lg": {
"name": "node-0",
"transport_address": "192.168.17:9300",
"host": "node-0.elastic.co",
"ip": "192.168.17",
"version": "{version}",
"build_flavor": "{build_flavor}",
"build_type": "zip",
"build_hash": "587409e",
"roles": [],
"attributes": {},
"ingest": {
"processors": [
{
"type": "date"
},
{
"type": "uppercase"
},
{
"type": "set"
},
{
"type": "lowercase"
},
{
"type": "gsub"
},
{
"type": "convert"
},
{
"type": "remove"
},
{
"type": "fail"
},
{
"type": "foreach"
},
{
"type": "split"
},
{
"type": "trim"
},
{
"type": "rename"
},
{
"type": "join"
},
{
"type": "append"
}
]
}
}
}
}
The following information are available for each ingest processor:
-
type: the processor type