High availability VM

High availability VM

[Pablo Mellado]

Hi there,

I would need a system running in a VM with high availability. My current 
version of KVM in Debian Lenny does not support to take snapshots of the 
VM while it is running. So I was wondering if I can migrate the VM and 
then make the snapshot on the source host. Once the snapshot is done, I 
would migrate the machine back to the source host. Is that possible? Can 
I run a savevm command on a already migrated VM?

The main idea is to make snapshots in a daily basis, and in case the 
host machine fails (i.e. hardware failure), starts the last snapshot in 
a new host.

Best regards,

   Pablo

-- 

Pablo Mellado
Software Engineer

Instituto de Radioastronomia Milimetrica
Avenida Divina Pastora 7, Local 20
E 18012 Granada, España
Telefono: +34 958 805 456 
Fax: +34 958 222363

RE: High availability VM

[Martin Maurer]

> -----Original Message-----
> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org] On
> Behalf Of Pablo Mellado
> Sent: Donnerstag, 28. Jänner 2010 09:55
> To: kvm@vger.kernel.org
> Subject: High availability VM
> 
> Hi there,
> 
> I would need a system running in a VM with high availability. My
> current
> version of KVM in Debian Lenny does not support to take snapshots of
> the
> VM while it is running. So I was wondering if I can migrate the VM and
> then make the snapshot on the source host. Once the snapshot is done, I
> would migrate the machine back to the source host. Is that possible?
> Can
> I run a savevm command on a already migrated VM?
> 
> The main idea is to make snapshots in a daily basis, and in case the
> host machine fails (i.e. hardware failure), starts the last snapshot in
> a new host.

You use LVM snapshots for online backups.
http://pve.proxmox.com/wiki/Backup_-_Restore_-_Live_Migration

For improving HA, take a look on DRBD.

Br, Martin

> 
> Best regards,
> 
>    Pablo
> 
> --
> 
> Pablo Mellado
> Software Engineer
> 
> Instituto de Radioastronomia Milimetrica
> Avenida Divina Pastora 7, Local 20
> E 18012 Granada, España
> Telefono: +34 958 805 456
> Fax: +34 958 222363
> 
> --
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