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'