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critical:
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Fixes a critical bug which caused Nova instances (VMs) using libvirtd
(the default/usual choice) to get killed on libvirtd (``nova_libvirt``)
container stop (and thus any restart - either manual or done by running
Kolla Ansible). It was affecting Wallaby+ on CentOS, Ubuntu and Debian
Buster (not Bullseye). If your deployment is also affected, please read the
referenced Launchpad bug report, comment #22, for how to fix it without
risking data loss. In short: fixing requires redeploying and this will
trigger the bug so one has to first migrate important VMs away and only
then redeploy empty compute nodes.
`LP#1941706 <https://launchpad.net/bugs/1941706>`__
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