Security Onion 2 performs daily backups of some critical files so that you can recover your grid from a catastophic failure of the manager. Daily backups create a tar file located in /nsm/backups directory located on the manager.
What is being backed up?¶
All of the certs including the CA are backed up. Restoring this would allow you to communicate with your salt minions again.
This includes all of minion sls files and all other sls customizations.
Kibana customizations are located in the .kibana indices. Periodic snapshots of this data will preserve them in caes of failure. You can also utilize true elastic clustering to add replicas to ensure quick recovery.
Users can enable snapshots with curator to snapshot data to an external storage device such as a NAS. True Elastic clustering will allow you to have redundancy in case of a single node failure if you enable replicas. Keep in mind that addiung a replica doubles your storage needs.