Get node information

GET /_cat/nodes

Get information about the nodes in a cluster. 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.

Query parameters

  • bytes string

    The unit used to display byte values.

    Values are b, kb, mb, gb, tb, or pb.

  • full_id boolean | string

    If true, return the full node ID. If false, return the shortened node ID.

  • If true, the response includes information from segments that are not loaded into memory.

  • h string | array[string]

    List of columns to appear in the response. Supports simple wildcards.

  • 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.

  • Period to wait for a connection to the master node.

  • time string

    Unit used to display time values.

    Values are nanos, micros, ms, s, m, h, or d.

Responses

GET /_cat/nodes
curl \
 --request GET http://api.example.com/_cat/nodes \
 --header "Authorization: $API_KEY"
Response examples (200)
[
  {
    "id": "string",
    "pid": "string",
    "ip": "string",
    "port": "string",
    "http_address": "string",
    "version": "string",
    "flavor": "string",
    "type": "string",
    "build": "string",
    "jdk": "string",
    "": "string",
    "heap.current": "string",
    "heap.max": "string",
    "ram.current": "string",
    "ram.max": "string",
    "file_desc.current": "string",
    "file_desc.max": "string",
    "cpu": "string",
    "load_1m": "string",
    "load_5m": "string",
    "load_15m": "string",
    "uptime": "string",
    "node.role": "string",
    "master": "string",
    "name": "string",
    "completion.size": "string",
    "fielddata.memory_size": "string",
    "fielddata.evictions": "string",
    "query_cache.memory_size": "string",
    "query_cache.evictions": "string",
    "query_cache.hit_count": "string",
    "query_cache.miss_count": "string",
    "request_cache.memory_size": "string",
    "request_cache.evictions": "string",
    "request_cache.hit_count": "string",
    "request_cache.miss_count": "string",
    "flush.total": "string",
    "flush.total_time": "string",
    "get.current": "string",
    "get.time": "string",
    "get.total": "string",
    "get.exists_time": "string",
    "get.exists_total": "string",
    "get.missing_time": "string",
    "get.missing_total": "string",
    "indexing.delete_current": "string",
    "indexing.delete_time": "string",
    "indexing.delete_total": "string",
    "indexing.index_current": "string",
    "indexing.index_time": "string",
    "indexing.index_total": "string",
    "indexing.index_failed": "string",
    "merges.current": "string",
    "merges.current_docs": "string",
    "merges.current_size": "string",
    "merges.total": "string",
    "merges.total_docs": "string",
    "merges.total_size": "string",
    "merges.total_time": "string",
    "refresh.total": "string",
    "refresh.time": "string",
    "refresh.external_total": "string",
    "refresh.external_time": "string",
    "refresh.listeners": "string",
    "script.compilations": "string",
    "script.cache_evictions": "string",
    "script.compilation_limit_triggered": "string",
    "search.fetch_current": "string",
    "search.fetch_time": "string",
    "search.fetch_total": "string",
    "search.open_contexts": "string",
    "search.query_current": "string",
    "search.query_time": "string",
    "search.query_total": "string",
    "search.scroll_current": "string",
    "search.scroll_time": "string",
    "search.scroll_total": "string",
    "segments.count": "string",
    "segments.memory": "string",
    "segments.index_writer_memory": "string",
    "segments.version_map_memory": "string",
    "segments.fixed_bitset_memory": "string",
    "suggest.current": "string",
    "suggest.time": "string",
    "suggest.total": "string",
    "bulk.total_operations": "string",
    "bulk.total_time": "string",
    "bulk.total_size_in_bytes": "string",
    "bulk.avg_time": "string",
    "bulk.avg_size_in_bytes": "string"
  }
]
Response examples (200)
A successful response from `GET /_cat/nodes?v=true`. The `ip`, `heap.percent`, `ram.percent`, `cpu`, and `load_*` columns provide the IP addresses and performance information of each node. The `node.role`, `master`, and `name` columns provide information useful for monitoring an entire cluster, particularly large ones.
ip        heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
127.0.0.1           65          99  42    3.07                  dim       *      mJw06l1
A successful response from `GET /_cat/nodes?v=true&h=id,ip,port,v,m`. It returns the `id`, `ip`, `port`, `v` (version), and `m` (master) columns.
id   ip        port  v         m
veJR 127.0.0.1 59938 8.17.0 *