<div dir="ltr">Thanks, I'll check it out. <br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jul 5, 2021 at 4:30 PM Daniel P. Berrangé <<a href="mailto:berrange@redhat.com">berrange@redhat.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Mon, Jul 05, 2021 at 08:31:15AM +0800, Jiatong Shen wrote:<br>
> Hello community,<br>
> <br>
> I am using OpenStack nova and realize that nova now uses host fqdn from<br>
> libvirt as a uniq identifier for a compute node.  The issue is that host<br>
> might need to change its fqdn under some<br>
> rare circumstances and lose some usage data due to the nova manages<br>
> compute node resources.<br>
> <br>
> My question is: does libvirt already export host uuid identifier to other<br>
> applications? I skim through the code base and find there is host uuid<br>
> related code which reads /etc/machine-id to obtain a uniq uuid for<br>
> migration, but seems this uuid cannot be obtained through virsh interface.<br>
<br>
Libvirt has long exposed a host UUID in the capabilities XML<br>
<br>
Regards,<br>
Daniel<br>
-- <br>
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<br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><br><div>Best Regards,</div><div><br></div><div>Jiatong Shen</div></div></div>