Get master node information | Elasticsearch API documentation (v9)

Get master node information Generally available

GET /_cat/master

Get information about the master node, including the ID, bound IP address, and name.

IMPORTANT: cat APIs are only intended for human consumption using the command line or Kibana console. They are not intended for use by applications. For application consumption, use the nodes info API.

Required authorization

Cluster privileges: monitor

Query parameters

h string | array[string]
A comma-separated list of columns names to display. It supports simple wildcards.

Supported values include:
- id: The node ID.
- host (or h): The host name of the node.
- ip: The IP address of the node.
- node (or n): The node name.
Values are id, host, h, ip, node, or n.
s string | array[string]

List of columns that determine how the table should be sorted. Sorting defaults to ascending and can be changed by setting :asc or :desc as a suffix to the column name.
local boolean

If true, the request computes the list of selected nodes from the local cluster state. If false the list of selected nodes are computed from the cluster state of the master node. In both cases the coordinating node will send requests for further information to each selected node.
master_timeout string

Period to wait for a connection to the master node.

Values are -1 or 0.

Responses

200 application/json
Hide response attributes Show response attributes object
- id string
  
  node id
- host string
  
  host name
- ip string
  
  ip address
- node string
  
  node name

GET /_cat/master

GET /_cat/master?v=true&format=json

resp = client.cat.master(
    v=True,
    format="json",
)

const response = await client.cat.master({
  v: "true",
  format: "json",
});

response = client.cat.master(
  v: "true",
  format: "json"
)

$resp = $client->cat()->master([
    "v" => "true",
    "format" => "json",
]);

curl -X GET -H "Authorization: ApiKey $ELASTIC_API_KEY" "$ELASTICSEARCH_URL/_cat/master?v=true&format=json"

client.cat().master();

Response examples (200)

A successful response from `GET /_cat/master?v=true&format=json`.

[
  {
    "id": "YzWoH_2BT-6UjVGDyPdqYg",
    "host": "127.0.0.1",
    "ip": "127.0.0.1",
    "node": "YzWoH_2"
  }
]