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There is no public guidance for a customer who needs to be able to restore an overcloud. Currently available resources are inadequate: * A method is documented for restoring an undercloud only: https://access.redhat.com/documentation/en/red-hat-openstack-platform/9/single/back-up-and-restore-the-director-undercloud/ * What appears to be an internal work-in-progress describes a method to restore first controller from host backup, then add in remaining controller: http://file.bne.redhat.com/~ggillies/overcloud-backup-restore-process.html But it seems to have some unresolved ssues: http://post-office.corp.redhat.com/archives/rhos-tech/2016-July/msg00404.html * This kcs says you can’t do a hot backup of the galera db - https://access.redhat.com/solutions/2405481 . but it might be possible with v10. Is it? If you can’t do a hot backup, can you do a cold, if so how would you use it? A documented backup / restore solution must address make clear the following: - what is recovered or not of the multiple layers of the environment: the undercloud, the overcloud configuration defined in the undercloud, the state of the overcloud, the user defined objects in the cloud.