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Elastic Docs ›Elasticsearch Guide [7.9] ›REST APIs ›cat APIs

cat nodeattrs API

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cat nodeattrs API

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Returns information about custom node attributes.

Request

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GET /_cat/nodeattrs

Query parameters

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format
(Optional, string) Short version of the HTTP accept header. Valid values include JSON, YAML, etc.
h

(Optional, string) Comma-separated list of column names to display.

If you do not specify which columns to include, the API returns the default columns in the order listed below. If you explicitly specify one or more columns, it only returns the specified columns.

Valid columns are:

node,name
(Default) Name of the node, such as DKDM97B.
host, h
(Default) Host name, such as n1.
ip, i
(Default) IP address, such as 127.0.1.1.
attr, attr.name
(Default) Attribute name, such as rack.
value, attr.value
(Default) Attribute value, such as rack123.
id, nodeId
ID of the node, such as k0zy.
pid, p
Process ID, such as 13061.
port, po
Bound transport port, such as 9300.
help
(Optional, Boolean) If true, the response includes help information. Defaults to false.
local
(Optional, Boolean) If true, the request retrieves information from the local node only. Defaults to false, which means information is retrieved from the master node.
master_timeout
(Optional, time units) Specifies the period of time to wait for a connection to the master node. If no response is received before the timeout expires, the request fails and returns an error. Defaults to 30s.
s
(Optional, string) Comma-separated list of column names or column aliases used to sort the response.
v
(Optional, Boolean) If true, the response includes column headings. Defaults to false.

Examples

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Example with default columns

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GET /_cat/nodeattrs?v

The API returns the following response:

node    host      ip        attr     value
...
node-0 127.0.0.1 127.0.0.1 testattr test
...

The node, host, and ip columns provide basic information about each node. The attr and value columns return custom node attributes, one per line.

Example with explicit columns

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The following API request returns the name, pid, attr, and value columns.

GET /_cat/nodeattrs?v&h=name,pid,attr,value

The API returns the following response:

name    pid   attr     value
...
node-0 19566 testattr test
...
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