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

Alexandre DERUMIER aderumier at odiso.com
Thu Jan 30 13:05:42 CET 2020


ceph client vs server are generally compatible between 2 or 3 releases.

They are no way to make working nautilus or luminous  clients with firefly.
I think minimum is jewel server  for nautilus client.


So best way could be to upgrade your old proxmox cluster first. (from 4->6, this can be done easily without downtime)



----- Mail original -----
De: "Fabrizio Cuseo" <f.cuseo at panservice.it>
À: "uwe sauter de" <uwe.sauter.de at gmail.com>, "proxmoxve" <pve-user at pve.proxmox.com>
Envoyé: Jeudi 30 Janvier 2020 12:59:13
Objet: Re: [PVE-User] RBD Storage from 6.1 to 3.4 (or 4.4)

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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