Lost of a KVM host with VMs on Local storage

[Antoine Boucher <an...@haltondc.com>]

Hello,

We have a few high iops VMs running on local storage on some of our KVM hosts.  We backup (snapshots) these VMs on a regular basis on secondary storage.

In the event of a compete KVM host failure.  

What would be the best practice to clean-up and restart the VMs from backups to a new host.

Would it just be a simple restore from the snapshot to the new host and the MS will fix the corresponding references to the dead VM and volume object?  I remember having to delete records in the MS db to remove the volume reference when a host was removed before removing its local volume from the GUI.

Regards,
Antoine

Re: Lost of a KVM host with VMs on Local storage

[Nux <nu...@li.nux.ro>]

Hi,

Ideally you would have a full baremetal backup of the hypervisor if 
using local storage.
If that is not a possibility, then you could convert the volume snapshot 
of the VM into a template and deploy it on the desired hypervisor.

You will not be able to "revert to snapshot" if your hypervisor is 
completely gone, as you have noticed, in the DB there are references to 
both hypervisor and storage pool that would need messing with.

---
Nux
www.nux.ro

On 2022-09-28 15:43, Antoine Boucher wrote:
> Hello,
> 
> We have a few high iops VMs running on local storage on some of our
> KVM hosts.  We backup (snapshots) these VMs on a regular basis on
> secondary storage.
> 
> In the event of a compete KVM host failure.
> 
> What would be the best practice to clean-up and restart the VMs from
> backups to a new host.
> 
> Would it just be a simple restore from the snapshot to the new host
> and the MS will fix the corresponding references to the dead VM and
> volume object?  I remember having to delete records in the MS db to
> remove the volume reference when a host was removed before removing
> its local volume from the GUI.
> 
> Regards,
> Antoine