# Node roles in Elasticsearch 2.x
**URL:** https://discuss.elastic.co/t/node-roles-in-elasticsearch-2-x/82861
**Category:** Elasticsearch
**Created:** [April 19, 2017, 10:15am UTC](https://discuss.elastic.co/t/node-roles-in-elasticsearch-2-x/82861 "2017-04-19T10:15:37Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@joschi](https://discuss.elastic.co/u/joschi)
#### Post date: [April 19, 2017, 10:15am UTC](https://discuss.elastic.co/t/node-roles-in-elasticsearch-2-x/82861/1 "2017-04-19T10:15:37Z")
What's a reliable way to retrieve the roles of an Elasticsearch node (master, data, client) with Elasticsearch 2.x?
It seems that the `attributes` field in the [Nodes Info API](https://www.elastic.co/guide/en/elasticsearch/reference/2.4/cluster-nodes-info.html) isn't available all the time:
```auto
$ curl http://127.0.0.1:9200/?pretty
{
"name" : "King Bedlam",
"cluster_name" : "elasticsearch",
"version" : {
"number" : "2.4.0",
"build_hash" : "ce9f0c7394dee074091dd1bc4e9469251181fc55",
"build_timestamp" : "2016-08-29T09:14:17Z",
"build_snapshot" : false,
"lucene_version" : "5.5.2"
},
"tagline" : "You Know, for Search"
}
```
```auto
$ curl -s http://127.0.0.1:9200/_nodes?pretty | jq '.nodes | .[] | [.attributes]'
[
{
"client": "true",
"data": "false",
"master": "false"
}
]
[
null
]
```
The full output of the Nodes Info API is as follows (slightly shortened to fit the character limits):
```auto
$ curl -s http://127.0.0.1:9200/_nodes?pretty
{
"cluster_name" : "elasticsearch",
"nodes" : {
"DeehriT-TxqB_DeZBnuNMA" : {
"name" : "custom-client-node",
"transport_address" : "127.0.0.1:9350",
"host" : "127.0.0.1",
"ip" : "127.0.0.1",
"version" : "2.4.4",
"build" : "fcbb46d",
"http_address" : "127.0.0.1:9201",
"attributes" : {
"client" : "true",
"data" : "false",
"master" : "false"
},
"settings" : {
"cluster" : {
"name" : "elasticsearch"
},
"node" : {
"name" : "custom-client-node",
"client" : "true",
"data" : "false",
"master" : "false"
},
"path" : {
"data" : "data/elasticsearch",
"logs" : "data/elasticsearch/logs",
"home" : "data/elasticsearch"
},
"discovery" : {
"zen" : {
"ping" : {
"unicast" : {
"hosts" : ["127.0.0.1:9300"]
}
}
},
"initial_state_timeout" : "3s"
},
"name" : "custom-client-node",
"action" : {
"auto_create_index" : "false"
},
"client" : {
"type" : "node"
},
"http" : {
"enabled" : "true"
},
"transport" : {
"tcp" : {
"port" : "9350"
}
}
},
"os" : {
"refresh_interval_in_millis" : 1000,
"name" : "Mac OS X",
"arch" : "x86_64",
"version" : "10.12.4",
"available_processors" : 8,
"allocated_processors" : 8
},
"process" : {
"refresh_interval_in_millis" : 1000,
"id" : 20772,
"mlockall" : false
},
"jvm" : {
"pid" : 20772,
"version" : "1.8.0_121",
"vm_name" : "Java HotSpot(TM) 64-Bit Server VM",
"vm_version" : "25.121-b13",
"vm_vendor" : "Oracle Corporation",
"start_time_in_millis" : 1492595873725,
"mem" : {
"heap_init_in_bytes" : 268435456,
"heap_max_in_bytes" : 3817865216,
"non_heap_init_in_bytes" : 2555904,
"non_heap_max_in_bytes" : 0,
"direct_max_in_bytes" : 3817865216
},
"gc_collectors" : ["PS Scavenge", "PS MarkSweep"],
"memory_pools" : ["Code Cache", "Metaspace", "Compressed Class Space", "PS Eden Space", "PS Survivor Space", "PS Old Gen"],
"using_compressed_ordinary_object_pointers" : "true"
},
"thread_pool" : { … },
"transport" : {
"bound_address" : ["127.0.0.1:9350"],
"publish_address" : "127.0.0.1:9350",
"profiles" : { }
},
"http" : {
"bound_address" : ["127.0.0.1:9201"],
"publish_address" : "127.0.0.1:9201",
"max_content_length_in_bytes" : 104857600
},
"plugins" : [],
"modules" : []
},
"0P3xXxKKSF6rKryL6pdM6Q" : {
"name" : "King Bedlam",
"transport_address" : "127.0.0.1:9300",
"host" : "127.0.0.1",
"ip" : "127.0.0.1",
"version" : "2.4.0",
"build" : "ce9f0c7",
"http_address" : "127.0.0.1:9200",
"settings" : {
"name" : "King Bedlam",
"client" : {
"type" : "node"
},
"cluster" : {
"name" : "elasticsearch"
},
"path" : {
"logs" : "elasticsearch-2.4.0/logs",
"home" : "elasticsearch-2.4.0"
},
"config" : {
"ignore_system_properties" : "true"
},
"network" : {
"host" : "127.0.0.1"
}
},
"os" : {
"refresh_interval_in_millis" : 1000,
"name" : "Mac OS X",
"arch" : "x86_64",
"version" : "10.12.4",
"available_processors" : 8,
"allocated_processors" : 8
},
"process" : {
"refresh_interval_in_millis" : 1000,
"id" : 20651,
"mlockall" : false
},
"jvm" : {
"pid" : 20651,
"version" : "1.8.0_121",
"vm_name" : "Java HotSpot(TM) 64-Bit Server VM",
"vm_version" : "25.121-b13",
"vm_vendor" : "Oracle Corporation",
"start_time_in_millis" : 1492594873945,
"mem" : {
"heap_init_in_bytes" : 268435456,
"heap_max_in_bytes" : 1037959168,
"non_heap_init_in_bytes" : 2555904,
"non_heap_max_in_bytes" : 0,
"direct_max_in_bytes" : 1037959168
},
"gc_collectors" : ["ParNew", "ConcurrentMarkSweep"],
"memory_pools" : ["Code Cache", "Metaspace", "Compressed Class Space", "Par Eden Space", "Par Survivor Space", "CMS Old Gen"],
"using_compressed_ordinary_object_pointers" : "true"
},
"thread_pool" : { … }
"transport" : {
"bound_address" : ["127.0.0.1:9300"],
"publish_address" : "127.0.0.1:9300",
"profiles" : { }
},
"http" : {
"bound_address" : ["127.0.0.1:9200"],
"publish_address" : "127.0.0.1:9200",
"max_content_length_in_bytes" : 104857600
},
"plugins" : [],
"modules" : []
}
}
}
```
---
### Author:  [@joschi](https://discuss.elastic.co/u/joschi)
#### Post date: [April 19, 2017, 10:33am UTC](https://discuss.elastic.co/t/node-roles-in-elasticsearch-2-x/82861/2 "2017-04-19T10:33:20Z")
@warkolm kindly pointed me at the [cat nodes API](https://www.elastic.co/guide/en/elasticsearch/reference/2.4/cat-nodes.html) which contains the required information:
```auto
$ curl -s 'http://127.0.0.1:9200/_cat/nodes?h=n,r'
custom-client-node c
King Bedlam d
```
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 17, 2017, 10:41am UTC](https://discuss.elastic.co/t/node-roles-in-elasticsearch-2-x/82861/3 "2017-05-17T10:41:32Z")
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