Check if the index exists or not Elasticsearch

Question

I want to check in elasticsearch if the index exists or not. If it not exists it should create the index and do other functionality. I try to find out a solution for that, but did not find any perfect solution for that. Can anyone have any solution to solve this problem.

I am using Elasticsearch library.

**$client = new Elasticsearch\Client();**

Answer 1

As per index operations and source code the following should work

 $client = new Elasticsearch\Client();
 $indexParams['index']  = 'my_index';   
 $client->indices()->exists($indexParams);

Answer 2

This will return true or false:

$params = ['index' => 'products'];
$bool=$client->indices()->exists($params);

Answer 3

The documentation for list all indexes here: https://www.elastic.co/guide/en/elasticsearch/reference/current/_list_all_indexes.html

Using curl:

curl 'localhost:9200/_cat/indices?v'

Answer 4

Other way by using Facade:

use ScoutElastic\Facades\ElasticClient;

$indexParams['index']  = "model_index";
$exists = ElasticClient::indices()->exists($indexParams);
if ($exists) {
   //do somthing
}

Answer 5

I was able to do it with node.js, as below

const { Client } = require('@elastic/elasticsearch');
const client = new Client({
  node: ES_URL,
});
await client.indices.exists({ index: 'INDEX_NAME' });

and the response should be similar to this one below:

{
  body: true,
  statusCode: 200,
  headers: {
    date: 'Sun, 07 Mar 2021 13:07:31 GMT',
    server: 'Apache/2.4.46 (Unix) OpenSSL/1.1.1d',
    'content-type': 'application/json; charset=UTF-8',
    'content-length': '2796',
    'keep-alive': 'timeout=5, max=100',
    connection: 'Keep-Alive'
  },
  meta: {
    context: null,
    request: { params: [Object], options: {}, id: 1 },
    name: 'elasticsearch-js',
    connection: {
      url: 'ES_URL',
      id: 'ES_ID',
      headers: {},
      deadCount: 0,
      resurrectTimeout: 0,
      _openRequests: 0,
      status: 'alive',
      roles: [Object]
    },
    attempts: 0,
    aborted: false
  }
}

Answer 6

For more recent versions of Elasticsearch (8.x), using the php library (with corresponding version 8.x) a call to $client->indices()->exists($indexParams) no longer returns a boolean, it instead returns an instance of Elastic\Elasticsearch\Response\Elasticsearch . This response is actually a 200 HTTP response if the index exists, or a HTTP 404 if it does not, but it also has the helpful asBool() you can use that abstracts away the HTTP codes eg

$client->indices()->exists($indexParams)->asBool();