libvirt users - Nov 2022 - domain_qemu_agent_command($domain,$cmd,$timeout,$flags)

On 10/25/22 20:04, Simon Fairweather wrote:
> Should there be a way to suppress errors using the flags?
> 
> ?error : qemuDomainAgentAvailable:8411 : Guest agent is not responding:
> QEMU guest agent is not connected
> 
> 
> Or is there a libvirt function to check connection status or another way?
This error message is "harmless" in a sense that there is no split
brain
of states between libvirt and QEMU. But yeah, your API is going to fail.

You can check for the agent status in the domain XML, for instance with
the following (rewrite in your favorite language):

virsh dumpxml fedora | xpath -e
"string(//channel/target[@name='org.qemu.guest_agent.0']/@state)"

Michal

Thanks Michal, php version I used.

        $xml = new SimpleXMLElement($lv->domain_get_xml($res)) ;
        $data
$xml->xpath('//channel/target[@name="org.qemu.guest_agent.0"]/@state')
;

On Wed, Oct 26, 2022 at 8:21 AM Michal Pr?vozn?k <mprivozn at redhat.com>
wrote:
> On 10/25/22 20:04, Simon Fairweather wrote:
> > Should there be a way to suppress errors using the flags?
> >
> >  error : qemuDomainAgentAvailable:8411 : Guest agent is not
responding:
> > QEMU guest agent is not connected
> >
> >
> > Or is there a libvirt function to check connection status or another
way?
>
> This error message is "harmless" in a sense that there is no
split brain
> of states between libvirt and QEMU. But yeah, your API is going to fail.
>
> You can check for the agent status in the domain XML, for instance with
> the following (rewrite in your favorite language):
>
> virsh dumpxml fedora | xpath -e
>
"string(//channel/target[@name='org.qemu.guest_agent.0']/@state)"
>
> Michal
>
>
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Hi Michal,

Can you advise why the following warning is logged for this command:
domain_qemu_agent_command($res,
'{"execute":"guest-network-get-interfaces"}', 10, 0)
;

warning : qemuDomainObjTaintMsg:6464 : Domain id=1 name='HA'
uuid=ffbc955e-9a51-f1d1-2501-b4cbdac5dd4c is tainted: custom-ga-command

Regards

On Wed, Oct 26, 2022 at 8:21 AM Michal Pr?vozn?k <mprivozn at redhat.com>
wrote:
> On 10/25/22 20:04, Simon Fairweather wrote:
> > Should there be a way to suppress errors using the flags?
> >
> >  error : qemuDomainAgentAvailable:8411 : Guest agent is not
responding:
> > QEMU guest agent is not connected
> >
> >
> > Or is there a libvirt function to check connection status or another
way?
>
> This error message is "harmless" in a sense that there is no
split brain
> of states between libvirt and QEMU. But yeah, your API is going to fail.
>
> You can check for the agent status in the domain XML, for instance with
> the following (rewrite in your favorite language):
>
> virsh dumpxml fedora | xpath -e
>
"string(//channel/target[@name='org.qemu.guest_agent.0']/@state)"
>
> Michal
>
>
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