________________________________ From: Stephan Seitz <s.se...@secretresearchfacility.com> Sent: Thursday, October 13, 2016 10:31 AM To: users@cloudstack.apache.org Subject: Re: Long downtimes for VMs through automatically triggered storage migration <snip> >> We turn off HA storage migration, as it doesn't make much sense to >> us. It assumes the storage is still up, as you obviously can't >> migrate a VM to a different primary storage if it's down. If you have >> enough hosts in a cluster, you should never run into a situation >> where you can't bring all your VMs back up due to host failure. So in >> that sense, HA storage migration is a pointless feature if you build >> and scale your clusters properly. > >Indeed, even if you have enough hosts, we ran into that situation due >to a bug with multiple datadisks and hvm introduced via https://github. >com/apache/cloudstack/pull/792 . >As a result acs tries to start the vm on node1,2,3... and so on and >fails on all hosts due to the underlying qemu-dm parsing error. >Finally it tries to start on nodes of another cluster which >subsequently triggers a storage migration. > >- Stephan
Yes, that's pretty nasty. Is there a fix for it yet? I don't see anything else mentioned, but it looks like Cloudops has the same issue. - Si
