[SOLVED] quick question about zfs snapshots?

[killmasta93]

Hi,
I was wondering if someone could shed some light on a question i have PVE-ZSYNC. So in theory PVE-zsync is a way to backup vms when you have another proxmox machine. My question is when it does the snapshot and sends to node 2 how come it also stores in node 1 the snapshot itself?
ex: node 1 sends snapshot to node 2 but on node 1 has the snapshot and also on node 2

in theory if running pve-zsync its recommended to have both hosts to have the same storage.

Thank you

 

[dietmar]

yes, snapshots needs to be on both nodes (they are synced).

 

[killmasta93]

Thanks for the reply, so lets say on host 1 my vm gets damaged, i want to restore to that snapshot without using zfs send from host 2, would that be possible? to restore on the same host because it has the snapshot?

 

[dietmar]

Yes. You can easily test that yourself.

 

[killmasta93]

Thanks for the reply, but i was looking though the manual, could not find anywhere that says i can restore the snapshot of its own vm without using the node 2. So VM 100 somehow gets damaged on node 1 because of zfs snapshots sends it to node 2 and also keeps a snapshot of its own on node 1 i want to restore that snapshot from node 1 and not from node 2. Could not find anywhere that implies that i can do it

 

[dietmar]

... i want to restore that snapshot from node 1 and not from node 2. Could not find anywhere that implies that i can do it

Simply do a snapshot rollback on the GUI?

 

[killmasta93]

Thanks for the reply, figured it out. this is the command if anyone need it just change the rep_ part to your own

zfs rollback vmdata/vm-102-disk-2@rep_backupmedusa_2018-12-29_14:19:57

Also to revert to a snapshot that is not recent just add the -r at the end but remember it will delete all recent snapshots

Still not sure why ZFS cannot revert to old snapshots unless its deleted.