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<p>This is interesting, because it's the exact opposite of what I'm
seeing in my test infrastructure.</p>
<p><br>
</p>
<p>If I do sudo docker restart 5b737dc80fc5 (the libvirt container),
I lose ssh access, web console access and the dashboard's log
window becomes empty. When the libvirt container comes back up, if
I go inside the container and do virsh list, the return list is
empty. As far as I can tell, the VM is effectively shutdown. The
openstack dashboard still reports it as up, but any attempt at
operations on the VM will force the dashboard to update and show
the VM as shut off.</p>
<p><br>
</p>
<p>As far as I can tell, restarting the docker container for libvirt
did kill off my VM here. From what you tell me, this is not the
expected behaviour. So, I must ask, why is it acting differently
in my environment? <br>
</p>
<p><br>
</p>
<p>Additionally, someone else said that the VMs were running on the
host with the process /usr/libexec/qemu-kvm running the VM. On my
compute host, qemu-kvm is not present in /usr/libexec. I
understand that this could be due to an OS difference, but I
thought it would be an important information to add.<br>
</p>
<p><br>
This is kolla 12.0 on ubuntu 20.04.3 with the openstack wallaby
container installed.</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 1/5/22 4:30 AM, Danny Webb wrote:<br>
</div>
<blockquote type="cite"
cite="mid:LO2P265MB5773733957C3D8AD1999A3449A4B9@LO2P265MB5773.GBRP265.PROD.OUTLOOK.COM">
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
If working properly the restart of the libvirtd container is a
non-impacting action for running VMs. The only containers on
the hypervisors that have an actual impact on the VMs in the
standard setups are the restart of the ovs-vswitchd /
ovn-controller / ovsdb containers which result in a small blip
of the VM neworks that we've noticed.</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b> J-P
Methot <a class="moz-txt-link-rfc2396E" href="mailto:jp.methot@planethoster.info"><jp.methot@planethoster.info></a><br>
<b>Sent:</b> 04 January 2022 19:17<br>
<b>To:</b> openstack-discuss
<a class="moz-txt-link-rfc2396E" href="mailto:openstack-discuss@lists.openstack.org"><openstack-discuss@lists.openstack.org></a><br>
<b>Subject:</b> [kolla] Updating libvirt container images
without VM downtime</font>
<div> </div>
</div>
<div class="BodyFragment"><font size="2"><span
style="font-size:11pt;">
<div class="PlainText">CAUTION: This email originates from
outside THG<br>
<br>
Hi,<br>
<br>
I'm looking for validation regarding the way Kolla and
containers work <br>
in regard to upgrading the libvirt containers.
Essentially, when you <br>
upgrade the libvirt container to a new container image,
the container <br>
needs to be restarted, thus creating downtime for the VMs.
There is no <br>
way to avoid this downtime, unless you migrate the VMs to
another node <br>
and then move them back once the container has restarted,
right?<br>
<br>
-- <br>
Jean-Philippe Méthot<br>
Senior Openstack system administrator<br>
Administrateur système Openstack sénior<br>
PlanetHoster inc.<br>
<br>
<br>
</div>
</span></font></div>
<p><span
style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Danny
Webb</span>
<br>
<span
style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">Senior
Linux Systems Administrator</span><br>
<span
style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#019EEB"><a
href="http://www.thehutgroup.com/" target="_blank"
moz-do-not-send="true"><span style="color:#575a5d;
text-decoration:none;text-underline:none">The Hut Group</span></a></span>
<br>
<br>
<span
style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">Tel:
</span>
<br>
<span
style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">Email:
<a href="mailto:Danny.Webb@thehutgroup.com"
moz-do-not-send="true">Danny.Webb@thehutgroup.com</a></span></p>
<p style="margin-bottom:12.0pt"><br>
<span
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the purposes of this email, the "company" means The Hut Group
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<span style="font-size:4pt;color:#FFFFFF">hgvyjuv</span>
</blockquote>
<pre class="moz-signature" cols="72">--
Jean-Philippe Méthot
Senior Openstack system administrator
Administrateur système Openstack sénior
PlanetHoster inc.</pre>
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