[PVE-User] RBD Storage from 6.1 to 3.4 (or 4.4)

Eneko Lacunza elacunza at binovo.es
Thu Jan 30 16:27:26 CET 2020

I think firefly is too old.

Either you create backups and restore in the new cluster, or you'll have 
to upgrade the old clusters at least to Proxmox 5 and Ceph Mimic.


El 30/1/20 a las 12:59, Fabrizio Cuseo escribió:
> I can't afford the long downtime. With my method, the downtime is only to stop the VM on the old cluster and start on the new; the disk image copy in done online.
> But my last migration was from 3.4 to 4.4
> ----- Il 30-gen-20, alle 12:51, Uwe Sauter uwe.sauter.de at gmail.com ha scritto:
>> If you can afford the downtime of the VMS you might be able to migrate the disk
>> images using "rbd export | ncat" and "ncat | rbd
>> import".
>> I haven't tried this with such a great difference of versions but from Proxmox
>> 5.4 to 6.1 this worked without a problem.
>> Regards,
>> 	Uwe
>> Am 30.01.20 um 12:46 schrieb Fabrizio Cuseo:
>>> I have installed a new cluster with the last release, with a local ceph storage.
>>> I also have 2 old and smaller clusters, and I need to migrate all the VMs to the
>>> new cluster.
>>> The best method i have used in past is to add on the NEW cluster the RBD storage
>>> of the old cluster, so I can stop the VM, move the .cfg file, start the vm (all
>>> those operations are really quick), and move the disk (online) from the old
>>> storage to the new storage.
>>> But now, if I add the RBD storage, copying the keyring file of the old cluster
>>> to the new cluster, naming as the storage ID, and using the old cluster
>>> monitors IP, i can see the storage summary (space total and used), but when I
>>> go to "content", i have this error: "rbd error: rbd: listing images failed:
>>> (95) Operation not supported (500)".
>>> If, from the new cluster CLI, i use the command:
>>> rbd -k /etc/pve/priv/ceph/CephOLD.keyring -m ls rbd2
>>> I can see the list of disk images, but also the error: "librbd::api::Trash:
>>> list: error listing rbd trash entries: (95) Operation not supported"
>>> The new cluster ceph release is Nautilus, and the old one is firefly.
>>> Some idea ?
>>> Thanks in advance, Fabrizio
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