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Elastic Docs ›Elasticsearch Guide [7.15] ›Set up a cluster for high availability

Back up a cluster

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Back up a cluster

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The only reliable and supported way to back up a cluster is by taking a snapshot. You cannot back up an Elasticsearch cluster by making copies of the data directories of its nodes. There are no supported methods to restore any data from a filesystem-level backup. If you try to restore a cluster from such a backup, it may fail with reports of corruption or missing files or other data inconsistencies, or it may appear to have succeeded having silently lost some of your data.

To have a complete backup for your cluster:

  1. Back up the data
  2. Back up the cluster configuration
  3. Back up the security configuration

To restore your cluster from a backup:

  1. Restore the data
  2. Restore the security configuration
« Resilience in larger clusters Back up a cluster’s data »