Comment 13 for bug 1788722

I'm going to guess we had a charm upgrade that was stuck/hooks not running on a unit and didn't know about it until it had unwedged under the new model. hopefully the logs in the juju crashdump help determine the nature of the triggered upgrade, as this was the only unit that had that happen of the 7 that should have exhibited this behavior. There were no other upgrades anytime in the last few months on this site beyond addition of new ceph-osd nodes which got moved under the 'ssds' pool. Notes left in associated support case with reference to that work.