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System indices

By default, Open Distro for Elasticsearch has a protected system index, .opendistro_security, which you create using Even if your user account has read permissions for all indices, you can’t directly access the data in this system index.

You can add additional system indices in in elasticsearch.yml. In addition to automatically creating .opendistro_security, the demo configuration adds several indices for the various Open Distro for Elasticsearch plugins that integrate with the security plugin:

opendistro_security.system_indices.enabled: true
opendistro_security.system_indices.indices: [".opendistro-alerting-config", ".opendistro-alerting-alert*", ".opendistro-anomaly-results*", ".opendistro-anomaly-detector*", ".opendistro-anomaly-checkpoints", ".opendistro-anomaly-detection-state"]

To access these indices, you must authenticate with an admin certificate:

curl -k --cert ./kirk.pem --key ./kirk-key.pem -XGET 'https://localhost:9200/.opendistro_security/_search'

The alternative is to remove indices from the opendistro_security.system_indices.indices list on each node and restart Elasticsearch.