Public bug reported:
This is issue is reproduced consistently from the snap-openstack-
hypervisor built from
https://git.launchpad.net/ubuntu/+source/libvirt@ubuntu/noble-updates
(with patches applied).
When creating a nova instance, live migrating between two hosts always fails
because of:
error: unsupported configuration: Target CPU feature count 44 does not match
source 109
Command that reproduces a Nova migration using libvirt client (and reproduces
the same error):
virsh migrate instance-00000002 qemu+tls://juju-596fd1-1.lxd/system
--live --p2p --persistent --undefinesource --copy-storage-inc --migrate-
disks vda --xml migratable.xml --persistent-xml migratable.xml
--bandwidth 0
Attached to this bug you will find:
- instance.xml: domain dumped through virsh
- migratable.xml: domain drump through virsh using --migratable (same flags as
nova updated xml)
- libvirtd.log: libvirt daemon debug logs showcasing why it refused to migrate
As you can see in the logs from libvirtd.log, the method
virDomainDefCheckABIStabilityFlags fails because the src has 65 VMX
additional features that are not found on the destination.
(Both hypervisors are hosted on LXD VMs on the same physical machines
i.e. same cpu flags)
** Affects: libvirt (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "libvirtd.log"
https://bugs.launchpad.net/bugs/2083986/+attachment/5826159/+files/libvirtd.log
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https://bugs.launchpad.net/bugs/2083986
Title:
Live migration fails because VMX features are missing on target cpu
definition
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