This is actually nova bug https://bugs.launchpad.net/mos/+bug/1581037 Unfortunately, it marked as Won't Fix. So it was an attempt to find workaround in Heat, but it fixes the bug only partially. Sometimes cancel update is failing. I will ask nova team about status of this bug, probably they will fix it, or we will try to find new workaround or move this bug to Won't Fix.
This is actually nova bug https:/ /bugs.launchpad .net/mos/ +bug/1581037 Unfortunately, it marked as Won't Fix. So it was an attempt to find workaround in Heat, but it fixes the bug only partially. Sometimes cancel update is failing. I will ask nova team about status of this bug, probably they will fix it, or we will try to find new workaround or move this bug to Won't Fix.