Automate Deletion of Docs from an Index that are older than 10 days

Elastic Stack Elasticsearch
3

Thanks @Christian_Dahlqvist ,
My index was not time series index, post reindexing it I convert it into time series index and rollover is happening as per ilm policy and able to achieve the goal.

POST /_reindex
{
  "source": {
    "index": "weather"
  },
  "dest": {
    "index": "weather-000001"
  }
}

DELETE weather

Appying Alias on timeseries index, Queries can run on alias which will be the weather.
POST /_aliases
{
  "actions": [
    {
      "add": {
        "index": "weather-000001",
        "alias": "weather",
        "is_write_index": true
      }
    }
  ]
}

Logstash output-

output {
  stdout {
    codec => rubydebug
    }
   elasticsearch {
           ilm_rollover_alias => "weather"
           ilm_pattern => "000001"
           ilm_policy => "weather"
     	   hosts => ["localhost:9200"]

One Query-

If we query (using an index pattern) for the last 3 days of data in an index that has rollover set to daily, does the query run only on the latest 3 indices or does it run on all?
I guess we need to specify the indices names in the query to limit to search to only the last 3 indices. Doesn't it happen automatically? Or does it happen automatically in the data stream but not in the index alias/ pattern?
If we have 10 days of data with daily rollover.

Sample query-

GET weather-*/_search
{
 "query": {
   "range": {
     "@timestamp": {
       "gte": "now-3d"
      }
    }
  }
}

Ref link-

Index lifecycle error - illegal_argument_exception: index.lifecycle.rollover_alias

Manage existing indices | Elasticsearch Guide [7.15] | Elastic
Data rollover in Elasticsearch