How to do it...

For opening and closing an index, we will perform the following steps:

1. From the command line, we can execute a POST call to close an index using the following command:

POST /myindex/_close

1. If the call is successful, the result returned by Elasticsearch should be as follows:

{
  "acknowledged" : true
}

1. To open an index from the command line, type the following command:

POST /myindex/_open

1. If the call is successful, the result returned by Elasticsearch should be:

{
  "acknowledged" : true,
  "shards_acknowledged" : true
}