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cat nodes
Introduced 1.0
The cat nodes operation lists node-level information, including node roles and load metrics.
A few important node metrics are pid, name, master, ip, port, version, build, jdk, along with disk, heap, ram, and file_desc.
Example
GET _cat/nodes?v
Path and HTTP methods
GET _cat/nodes
URL parameters
All cat nodes URL parameters are optional.
In addition to the common URL parameters, you can specify the following parameters:
| Parameter | Type | Description |
|---|---|---|
| bytes | Byte size | Specify the units for byte size. For example, 7kb or 6gb. For more information, see Supported units. |
| full_id | Boolean | If true, return the full node ID. If false, return the shortened node ID. Defaults to false. |
| local | Boolean | Whether to return information from the local node only instead of from the master node. Default is false. |
| master_timeout | Time | The amount of time to wait for a connection to the master node. Default is 30 seconds. |
| time | Time | Specify the units for time. For example, 5d or 7h. For more information, see Supported units. |
| include_unloaded_segments | Boolean | Whether to include information from segments not loaded into memory. Default is false. |
Response
ip | heap.percent | ram.percent | cpu load_1m | load_5m | load_15m | node.role | master | name
172.18.0.3 | 31 | 97 | 3 | 0.03 | 0.10 | 0.14 dimr | * | odfe-node2
172.18.0.4 | 45 | 97 | 3 | 0.19 | 0.14 | 0.15 dimr | - | odfe-node1