Hello everyone! I'm facing some troubles with nova and cinder here.
I have 2 control nodes (active/active) in my testing environment with Percona XtraDB cluster (Galera+xtrabackup) + garbd on a separate node (to avoid split-brain) + OpenStack Icehouse, latest from Ubuntu 14.04 main repo. The problem is horizontal scalability of nova-conductor and cinder-scheduler services, seems like all active instances of these services are trying to execute same MySQL queries they get from Rabbit, which leads to numerous deadlocks in set-up with Galera. In case when multiple nova-conductor services are running (and using MySQL instances on corresponding control nodes) it appears as "Deadlock found when trying to get lock; try restarting transaction" in log. With cinder-scheduler it leads to "InvalidBDM: Block Device Mapping is Invalid." Is there any possible way to make multiple instances of these services running simultaneously and not duplicating queries? (I don't really like the idea of handling this with Heartbeat+Pacemaker or other similar stuff, mostly because I'm thinking about equal load distribution across control nodes, but in this case it seems like it has an opposite effect, multiplying load on MySQL) Another thing that is extremely annoying: if instance stuck in ERROR state because of deadlock during its termination - it is impossible to terminate instance anymore in Horizon, only via nova-api with reset-state. How can this be handled? I'd really appreciate any help/advises/thoughts regarding these problems. Best regards, Motovilovets Sergey Software Operation Engineer
_______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
