First of all, create a configuration file. This file specifies which indexes to delete.
/opt/elasticsearch-curator/actions/delete.yml
An example of the content of such a file can be explained as below:
actions:
  1:
    action: delete_indices
    description: >-
      Delete indices older than 30 days (based on index name), for logstash-
      prefixed indices. Ignore the error if the filter does not result in an
      actionable list of indices (ignore_empty_list) and exit cleanly.
    options:
      ignore_empty_list: True
      timeout_override:
      continue_if_exception: False
      disable_action: True
    filters:
    - filtertype: pattern
      kind: prefix
      value: logstash-
      exclude:
    - filtertype: age
      source: name
      direction: older
      timestring: '%Y.%m.%d'
      unit: days
      unit_count: 30
      exclude:
In order for the action to be performed cyclically, you must add the command to crontab.
* 1 * * * /usr/bin/curator --config /opt/elasticsearch-curator/.curator/curator.yml /opt/elasticsearch-curator/actions/delete.yml > /dev/null 2>&1
Before running the command, test the curator's operation by adding a flag:
--dry-run