Hi, I'll just describe my upgrade process today. Cluster is back to a quorate and operational status, but I don't fully understand what happened and any input on what to do differently next time would be nice. This is a two-node cluster running qdisk (so 3 total votes), resources are mysql and haproxy with SAN backed storage. Both nodes mount /var/www with GFS on a SAN multipathed device. 1. Migrated all services to node B 2. Upgraded node A with yum 3. Rebooted node A 4. Node A rejoins cluster, and takes ownership of resource with failoverdomain priority 5. I notice /var/www is not mounted on node A 6. The errormessage is descriptive enough so I remove mountoptions until I can mount /var/www (remove noatime, noquota from fstab) 7. Migrated remaining service to node A 8. Upgraded node B with yum 9. Rebooted node B 10. When node B shuts down, node A instantly claims quorum lost and dissolves the cluster 11. Upon rebooting, node B hangs as the cluster is inquorate 12. Eventually rebooting both nodes re-establishes quorum and cluster services come up The messages on node A from the point where cluster quorum was dissolved say : Jan 27 14:57:57 nodeb qdiskd[3806]: <info> Node 1 shutdown Jan 27 14:58:03 nodeb clurgmgrd[4465]: <emerg> #1: Quorum Dissolved Jan 27 14:58:03 nodeb kernel: dlm: closing connection to node 1 Jan 27 14:58:03 nodeb openais[3755]: [CMAN ] lost contact with quorum device Jan 27 14:58:03 nodeb openais[3755]: [CMAN ] quorum lost, blocking activity Jan 27 14:58:03 nodeb ccsd[3681]: Cluster is not quorate. Refusing connection. Jan 27 14:58:03 nodeb ccsd[3681]: Error while processing connect: Connection refused Jan 27 14:58:03 nodeb ccsd[3681]: Invalid descriptor specified (-111). Jan 27 14:58:03 nodeb ccsd[3681]: Someone may be attempting something evil. I am still scratching my head over why quorum was dissolved over booting node B. Regards -- Denis Braekhus Team Lead Managed Services Redpill Linpro AS - Changing the game -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
