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Configure index lifecycle management

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Configure index lifecycle management

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Use the index lifecycle management (ILM) feature in Elasticsearch to manage your Filebeat indices as they age. For example, instead of creating daily indices where index size can vary based on the number of Beats and number of events sent, use an index lifecycle policy to automate a rollover to a new index when the existing index reaches a specified size or age.

Starting with version 7.0, Filebeat uses index lifecycle management by default when it connects to a cluster that supports lifecycle management. Filebeat loads the default policy automatically and applies it to any indices created by Filebeat.

You can view and edit the policy in the Index lifecycle policies UI in Kibana. For more information about working with the UI, see Index lifecyle policies.

Example configuration:

setup.ilm.enabled: auto
setup.ilm.rollover_alias: "filebeat"
setup.ilm.pattern: "{now/d}-000001"

Date math is supported here. For more information, see Using date math with the rollover API.

If index lifecycle management is enabled (which is typically the default), setup.template.name and setup.template.pattern are ignored.

Configuration options

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You can specify the following settings in the setup.ilm section of the filebeat.yml config file:

`setup.ilm.enabled`

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Enables or disables index lifecycle management on any new indices created by Filebeat. Valid values are true, false, and auto. When auto (the default) is specified on version 7.0 and later, Filebeat automatically uses index lifecycle management if the feature is enabled in Elasticsearch and has the required license; otherwise, Filebeat creates daily indices.

`setup.ilm.rollover_alias`

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The index lifecycle write alias name. The default is filebeat-%{[agent.version]}. Setting this option changes the alias name.

If you modify this setting after loading the index template, you must overwrite the template to apply the changes.

`setup.ilm.pattern`

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The rollover index pattern. The default is %{now/d}-000001.

Date math is supported in this setting. For example:

setup.ilm.pattern: "{now/M{yyyy.MM}}-000001"

For more information, see Using date math with the rollover API.

Before modifying this setting for an existing ILM setup, you must manually remove any aliases related to the previous pattern, then overwrite the policy. Existing indices that don’t match the new pattern might no longer be subject to index lifecycle management.

`setup.ilm.policy_name`

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The name to use for the lifecycle policy. The default is filebeat.

`setup.ilm.policy_file`

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The path to a JSON file that contains a lifecycle policy configuration. Use this setting to load your own lifecycle policy.

For more information about lifecycle policies, see Set up index lifecycle management policy in the Elasticsearch Reference.

`setup.ilm.check_exists`

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When set to false, disables the check for an existing lifecycle policy. The default is true. You need to disable this check if the Filebeat user connecting to a secured cluster doesn’t have the read_ilm privilege.

If you set this option to false, set setup.ilm.overwrite: true so the lifecycle policy can be installed.

`setup.ilm.overwrite`

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When set to true, the lifecycle policy is overwritten at startup. The default is false.

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