[pve-devel] Fw: Storage migration

[Alexandre DERUMIER]

Hi, 
I would like to work in this,

but after we have implemented new backup code, vm cloning/copying.

Also qemu 1.3 will have a live storage migration feature, release is planned for December.
So maybe we can at this when 1.3 will be released ?



----- Mail original ----- 

De: "Michael Rasmussen" <mir at datanom.net> 
À: pve-devel at pve.proxmox.com 
Envoyé: Samedi 17 Novembre 2012 16:10:25 
Objet: Re: [pve-devel] Fw: Storage migration 

On Sat, 17 Nov 2012 15:21:29 +0100 
Michael Rasmussen <mir at datanom.net> wrote: 

> On Sat, 17 Nov 2012 15:16:43 +0100 
> Michael Rasmussen <mir at datanom.net> wrote: 
> 
> Another issue with this procedure is that the VM changes ID which can 
> be an annoyance since a lot of configuration stuff like automatic 
> backup etc. is tied to a VM's ID in which case all this must be 
> changed. My solution does not change the VM's ID in which case all 
> existing configuration can remain unchanged. 
> 
Further arguments. The present migration works by moving the instance 
but keeps the storage. What I propose is a means to keep the instance 
but move the storage. 

Proxmox in its current incarnation provides HA on the instance level 
but lacks support for HA on the storage level. Eg. proxmox now can 
migrate an instance between nodes in case of node failures or node 
maintenance but if the storage needs maintenance you inevitably are 
faced with down-time since proxmox is not able to move the storage 
behind the instances running on the specific storage - the only 
possible current way is to use the backup/restore strategy but this 
strategy means down-time. The migration of storage is of course possible 
given that you have a full-blown SAN but for the poor mans setup there 
exists no such solution. 

I know work is done on distributed storage but distributed storage is 
not simple and will require more storage backend systems than what is 
required for my solution since it scales down to only require two NAS 
boxes which should be possible to buy even when using a poor mans setup. 

-- 
Hilsen/Regards 
Michael Rasmussen 

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