KVM - Can't Migrate from One Head

Hi all - anyone even use KVM on here? Have an odd one…

On one head, I can migrate guests to it, but can’t live migrate guests from it; have to pause them first. Error message appears saying either “Unable to migrate guest: internal error: owner -1 does not hold the resource lock” or complains it couldn’t lock a particular iscsi target; though the iscsi target it complains of (which sometimes changes) isn’t the one that belongs to that VM.

I’ve also spotted that the dm number (eg dm-12) in the multipath device enumerator doesn’t match the id of the device shown in multipath -ll across heads; eg 360014050cadca29d035dd3697d9e2ede will be dm-17 on one head, and 360014050cadca29d035dd3697d9e2ede is dm-6 on another. This is inconsistent across all heads.


Our support channels, listed at https://community.ubuntu.com/t/finding-help/712, are full of skilled volunteers ready to offer a hand and good advice.

Since this is not a support channel, closing this thread. Sorry.