Indexing document using alias endpoint in elasticsearch

TUTORIAL_ES_ALIAS.txt

# ILM
# https://www.elastic.co/guide/en/elasticsearch/reference/7.17/ilm-rollover.html#ilm-rollover-primar-shardsize-ex
# rollover in 5 min
PUT _ilm/policy/my_policy
{
  "policy": {
    "phases": {
      "hot": {
        "actions": {
          "rollover" : {
            "max_age": "5m"
          }
        }
      }
    }
  }
}
GET _ilm/policy/my_policy

# Index with rollover alias
# https://www.elastic.co/guide/en/elasticsearch/reference/7.17/ilm-rollover.html#ilm-rollover
PUT my-index-000001
{
  "settings": {
    "index.lifecycle.name": "my_policy",
    "index.lifecycle.rollover_alias": "my_data"
  },
  "aliases": {
    "my_data": {
      "is_write_index": true
    }
  }
}

# Index something
POST my_data/_doc
{
  "a_field": "Hello world."
}

# Wait 5 min and check if it's rollovered
GET _cat/aliases?v&s=alias

Commands are assuming you are running from kibana dev console