create rbd at external ceph cluster vm from qcow ...

[immo]

Hi, can some please explain how to convert, clone or copy a qcow2 file into a rbd vm ? I get often prepared images which i should start as VM (several ones) for test purpose.till today I ran therefore my VMs on nfs based storage where I can simply exchange the disk images.
But how I can do this on a ceph cluster based rbds? The cluster is not running in or at proxmox but separatly.

 

[Matthias.]

The ceph docs seem to describe it: https://docs.ceph.com/en/quincy/rbd/qemu-rbd/#running-qemu-with-rbd
However, I didn't test it myself

 

[fabian]

if the external ceph cluster is configured as PVE storage, you can simply use qm importdisk or the new import syntax for qm create/set, for example

qm set XXX -scsiN TARGET_STORAGE:0,import-from=/path/to/qcow2,...

where XXX is the VMID, N is the (in this case, SCSI) disk slot, TARGET_STORAGE is the name of your ceph storage in PVE, and the path is, well, the path if the qcow2 file is stored on a PVE-configured dir-like storage and named like PVE expects for a volume, you can also use import-from=STORAGE:VOLUME (as given by a storage content view/pvesm list STORAGE)