Backing up your VM: Difference between revisions

Unfortunately, OpenStack uses the word "snapshot" to mean two different things. There are volume snapshosts, as discussed above, and snapshots of VMs. Snapshots of VMs behave in different ways depending on the flavor of your VM. If you have a persistent VM and create a snapshot of the VM, OpenStack creates a nearly empty image, which contains pointers to volume snapshots.  These pointers point to volume snapshot(s) of the persistent VM's boot volume and any attached volumes which were created as part of creating a snapshot of the VM. You can then create a new VM (boot from image (creates a new volume)) which will create new volumes from the snapshots of the volumes taken previously, boot a new VM from the root volume and attach any other duplicated volumes.