How to migrate VMs to new CEPH Cluster?

[degan]

Hey, we build a new PVE ceph cluster and would now migrate all VMs from our old cluster.
In our old one we have ZFS and directory based storage (raw and qcow2 disks) mixed.
How can we do this? We already tested "qm remote-migrate" but this seems unable to migrate ZFS to CEPH Storage.
Is our only option to backup all the VMs and resore on the new cluster?

 

[gurubert]

It will always be an offline migration for the VMs.
You could use "qemu-img convert" to copy the qcow2 and raw images to the Ceph cluster if the old PVE has access to the new one.

 

[degan]

It will always be an offline migration for the VMs.
You could use "qemu-img convert" to copy the qcow2 and raw images to the Ceph cluster if the old PVE has access to the new one.

We have no direct access to the ceph volume from the old cluster. How can i do this?

 

[gurubert]

Somehow you will have to transport the images to the new cluster.

 

[degan]

Somehow you will have to transport the images to the new cluster.

of course, the question is how

 

[B.Otto]

I would just backup them on your old cluster and restore them on your new one.

Hook up an USB harddrive, mount it as a backup store. Shut down the old VMs, then backup them onto your USB datastore. The backup/restore operations use the corresponding storage and you dont have to think much about from what to what storage you are migrating.