ILM policy created and applied but it's not deleting the data

Elastic Stack Elasticsearch
1

Hello Experts,

I have created the ILM policy and applied to the index . but still it is not deleting the old file. is there anythin i miss or need to add. Please guide me.

PUT _ilm/policy/delete-old-indices
{
  "policy": {
    "phases": {
      "hot": {
        "min_age": "0ms",
        "actions": {
          "set_priority": {
            "priority": 100
          }
        }
      },
      "delete": {
        "min_age": "7d",
        "actions": {
          "delete": {
            "delete_searchable_snapshot": true
          }
        }
      }
    }
  }
}

and updated the template and index pattern

PUT tenant-*/_settings 
{
  "index": {
    "lifecycle": {
      "name": "delete-old-indices"
    }
  }
}
2

Can you share [an explain[(Explain lifecycle API | Elasticsearch Guide [8.7] | Elastic) on one of the indices you think should have been deleted?

3

Hi Warkolm,
Thank you for the reply.

below is the output of GET tenant-demo-2023.02.10/_ilm/explain

{
  "indices" : {
    "tenant-demo-2023.02.10" : {
      "index" : "tenant-demo-2023.02.10",
      "managed" : true,
      "policy" : "delete-old-indices",
      "lifecycle_date_millis" : 1676031719373,
      "age" : "74.65d",
      "phase" : "hot",
      "phase_time_millis" : 1682416154580,
      "action" : "rollover",
      "action_time_millis" : 1679643611758,
      "step" : "check-rollover-ready",
      "step_time_millis" : 1682416154580,
      "is_auto_retryable_error" : true,
      "failed_step_retry_count" : 2304,
      "phase_execution" : {
        "policy" : "delete-old-indices",
        "phase_definition" : {
          "min_age" : "0ms",
          "actions" : {
            "set_priority" : {
              "priority" : 29
            }
          }
        },
        "version" : 2,
        "modified_date_in_millis" : 1682415870237
      }
    }
  }
}
4

Can someone please help me to understand what exactly
The ILM policy ready which date to delete indices from below below.

"lifecycle_date_millis"
"phase_time_millis"
"action_time_millis"
"step_time_millis"
"modified_date_in_millis"

5

Hello @elasticlog

The numbers are epoch time format. as per your ILM explain output, indices which are 10th Feb dated will rollover to next phase after 74 days.

lifecycle_date_millis - February 10, 2023 5:51:59.373 PM GMT+05:30
phase_time_millis - April 25, 2023 3:19:14.580 PM GMT+05:30
action_time_millis - March 24, 2023 1:10:11.758 PM GMT+05:30
step_time_millis - April 25, 2023 3:19:14.580 PM GMT+05:30

However, you should also be mentioning warm phase as well in your polify. so, the flow should be hot, warm, delete.

For more information refer this elastic page.

6

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