Does ISM apply to system indices with the use of '*' index pattern?

Plugins Index Management
,
1

Hi,

I have not been able to find any information regarding if ISM policys by default are applied to hidden/system indices as well when using the index-pattern ‘*’?

Example policy:

{
    "id": "del_90_days",
    "seqNo": 96,
    "primaryTerm": 1,
    "policy": {
        "policy_id": "del_90_days",
        "description": "Simple default policy, just one state where we delete all indices older than 90 days from creation date.\n\nThis is applied to all new indices.",
        "last_updated_time": 1642167385603,
        "schema_version": 12,
        "error_notification": null,
        "default_state": "hot",
        "states": [
            {
                "name": "hot",
                "actions": [],
                "transitions": [
                    {
                        "state_name": "cold",
                        "conditions": {
                            "min_index_age": "90d"
                        }
                    }
                ]
            },
            {
                "name": "cold",
                "actions": [
                    {
                        "retry": {
                            "count": 2,
                            "backoff": "exponential",
                            "delay": "1h"
                        },
                        "delete": {}
                    }
                ],
                "transitions": []
            }
        ],
        "ism_template": [
            {
                "index_patterns": [
                    "*"
                ],
                "priority": 10,
                "last_updated_time": 1642167385603
            }
        ]
    }
}

Will this be applied to indices that start with a ‘.’? E.g. .kibana etc?

Thanks

1 Like
2

Can someone from the development team confirm that in OpenSearch, when using the above template with index-pattern ‘*’, it will NOT be applied to system/hidden indices that start with a ‘.’?

We have seen that if we use the same ISM policy with opendistro, the ISM policy is applied to system indices.

3

We will skip applying the policy to indices starting with “.” or marked hidden indices - index-management/ManagedIndexCoordinator.kt at main · opensearch-project/index-management · GitHub

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