Getting node statistic via API

The node statistic call API is used to collect real-time behaviors of your node, for example memory usage, threads usage, number of index, search, and so on.

Getting ready

You need a working ElasticSearch cluster.

How to do it…

For getting nodes statistic, we will perform the steps given as follows:

1. To retrieve the node statistic, the HTTP method is GET and the curl command is as follows:

   curl -XGET 'http://localhost:9200/_nodes/stats?all=true'
   curl -XGET 'http://localhost:9200/_nodes/<nodeId1>,<nodeId2>/stats?all=true'

2. The result will be a long description of all the node statistics. The result is composed of the following:

   • A header describing the cluster name and a nodes section:

     {
         "cluster_name": "elasticsearch",
         "nodes": {
             "pyGyXwh1ScqmnDw5etNS0w": {

   • Node filesystem statistics:

     "fs": {
         "data": [
             {
                 "available": "24.6gb",…
                 "dev": "/dev/sda1",..
                 "disk_read_size": "1gb",..
                 "disk_reads...