libvirt users - Apr 2023 - backup-begin

On Tue, Apr 04, 2023 at 16:28:18 +0200, Andr? Malm
wrote:
> Hello,
> 
> For some vms the virsh backup-begin sometimes shuts off the vm and returns
> "error: operation failed: domain is not running" although it was
clearly in
> state running (or paused).
> 
> Is the idea that you should guest-fsfreeze-freeze / virsh suspend before
> virsh backup-begin? I have tried with both with the same results.
Freezing the guest filesystems is a good idea to increase the data
consistency of the backup, but is not necessary. Nor it should have any
influence on the lifecycle of the VM.
> What could be causing the machine to shut off?
The VM most likely crashed, or was turned off in a different way.

Try running

 virsh domstate --reason $VMNAME

to see what the reason for the current state is.

The reason given is shut off (crashed).

So something virsh backup-begin does is causing he guest to crash?

Den 2023-04-04 kl. 16:58, skrev Peter Krempa:
> On Tue, Apr 04, 2023 at 16:28:18 +0200, Andr? Malm wrote:
>> Hello,
>>
>> For some vms the virsh backup-begin sometimes shuts off the vm and
returns
>> "error: operation failed: domain is not running" although it
was clearly in
>> state running (or paused).
>>
>> Is the idea that you should guest-fsfreeze-freeze / virsh suspend
before
>> virsh backup-begin? I have tried with both with the same results.
> Freezing the guest filesystems is a good idea to increase the data
> consistency of the backup, but is not necessary. Nor it should have any
> influence on the lifecycle of the VM.
>
>> What could be causing the machine to shut off?
> The VM most likely crashed, or was turned off in a different way.
>
> Try running
>
>   virsh domstate --reason $VMNAME
>
> to see what the reason for the current state is.
>