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

Fabrizio Cuseo f.cuseo at panservice.it
Thu Jan 30 16:32:12 CET 2020


Thank you all.
I will migrate using an iSCSI storage configured on both the clusters, so the VMs downtime will be short.
Fabrizio


----- Il 30-gen-20, alle 16:27, Eneko Lacunza elacunza at binovo.es ha scritto:

> 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.
> 
> Cheers
> 
> 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 172.16.20.31 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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> 
> 
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-- 
---
Fabrizio Cuseo - mailto:f.cuseo at panservice.it
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