Re: how to get vm uptime through libvirt api

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On Tue, Jul 26, 2022 at 10:27:19AM +0200, Michal Prívozník wrote:
> On 7/26/22 10:07, Jiatong Shen wrote:
> > thank you very much for reply. I have got another question which is off
> > topic.
> > Am I able to get vm's process id through libvirt api?
> Unfortunately, no. We specifically try to avoid telling users this
> information so that they are not tempted to go behind libvirt's back and
> interact with QEMU directly (which can lead to a split brain scenario -
> libvirt thinks guest is in a certain state, but in fact it's in a
> different state).
> But as I said, it should be fairly easy to extend stats to report when a
> domain was started. If you don't feel comfortable providing a patch for
> that I can try.

Note, the time since a guest was started on the host is NOT the same as
guest uptime. Guest uptime resets on every warm reboot the guest OS
does, while QEMU stays running.

With regards,
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