Hello, I saw some discussions in the past regarding the subject, such as: https://www.redhat.com/archives/cluster-devel/2011-September/msg00027.html My config is with an rhcs based on rhel 5.8 two nodes + quorum disk cluster and cman-2.0.115-96.el5_8.3 openais-0.80.6-36.el5_8.2 rgmanager-2.0.52-28.el5_8.2 I'm evaluating SAN migration from a storage array to another, including data disks and quorum disks, limiting downtime and considering pros&cons of several scenarios. One of the problems is quorum disk moving. I start in a situation where the nodes are seeing both the SANs and cluster data disks (in HA-LVM config) are already on new storage while quorum not. My test approach is this: - stop qdiskd on first node and wait for stabilization second node becomes master - stop qdiskd on second node and wait for stabilization - cluster maintains quorum (2 votes instead of expected 3 for each server) - format the new quorum lun with a different label - change cluster.conf accordingly and update/distribute the config with <quorumd device="/dev/mapper/mpnquorum" interval="5" label="nquorum" log_facility="local4" log_level="7" tko="16" votes="1"> - start qdiskd on first node and wait for stabilization it becomes master - start qdiskd on second node and wait for stabilization >From qdiskd point view all is gong well but openais shows: Sep 28 11:21:00 noracs1 openais[7671]: [CMAN ] unable to re-register quorum device: device names do not match Complete messages in qdiskd.log I set up are these, after start of qdiskd on the two nodes: Sep 28 11:16:35 noracs2 qdiskd[9422]: <debug> Heuristic: 'ping -c1 -w1 10.4.5.250' score=1 interval=2 tko=200 Sep 28 11:16:35 noracs2 qdiskd[9422]: <debug> 1 heuristics loaded Sep 28 11:16:35 noracs2 qdiskd[9422]: <debug> Quorum Daemon: 1 heuristics, 5 interval, 16 tko, 1 votes Sep 28 11:16:35 noracs2 qdiskd[9422]: <debug> Run Flags: 00000031 Sep 28 11:16:35 noracs2 qdiskd[9422]: <info> Quorum Partition: /dev/dm-6 Label: nquorum Sep 28 11:16:35 noracs2 qdiskd[9423]: <info> Quorum Daemon Initializing Sep 28 11:16:35 noracs2 qdiskd[9423]: <debug> I/O Size: 512 Page Size: 4096 Sep 28 11:16:36 noracs2 qdiskd[9423]: <info> Heuristic: 'ping -c1 -w1 10.4.5.250' UP Sep 28 11:17:55 noracs2 qdiskd[9423]: <info> Initial score 1/1 Sep 28 11:17:55 noracs2 qdiskd[9423]: <info> Initialization complete Sep 28 11:17:55 noracs2 openais[7653]: [CMAN ] unable to re-register quorum device: device names do not match Sep 28 11:17:55 noracs2 qdiskd[9423]: <notice> Score sufficient for master operation (1/1; required=1); upgrading Sep 28 11:18:05 noracs2 qdiskd[9423]: <debug> Making bid for master Sep 28 11:18:40 noracs2 qdiskd[9423]: <info> Assuming master role Sep 28 11:20:05 noracs2 qdiskd[9423]: <debug> Node 1 is UP Sep 28 11:19:40 noracs1 qdiskd[3779]: <debug> Heuristic: 'ping -c1 -w1 10.4.5.250' score=1 interval=2 tko=200 Sep 28 11:19:40 noracs1 qdiskd[3779]: <debug> 1 heuristics loaded Sep 28 11:19:40 noracs1 qdiskd[3779]: <debug> Quorum Daemon: 1 heuristics, 5 interval, 16 tko, 1 votes Sep 28 11:19:40 noracs1 qdiskd[3779]: <debug> Run Flags: 00000031 Sep 28 11:19:40 noracs1 qdiskd[3779]: <info> Quorum Partition: /dev/dm-5 Label: nquorum Sep 28 11:19:40 noracs1 qdiskd[3780]: <info> Quorum Daemon Initializing Sep 28 11:19:40 noracs1 qdiskd[3780]: <debug> I/O Size: 512 Page Size: 4096 Sep 28 11:19:41 noracs1 qdiskd[3780]: <info> Heuristic: 'ping -c1 -w1 10.4.5.250' UP Sep 28 11:20:05 noracs1 qdiskd[3780]: <debug> Node 2 is UP Sep 28 11:20:10 noracs1 qdiskd[3780]: <info> Node 2 is the master Sep 28 11:21:00 noracs1 qdiskd[3780]: <info> Initial score 1/1 Sep 28 11:21:00 noracs1 qdiskd[3780]: <info> Initialization complete Sep 28 11:21:00 noracs1 openais[7671]: [CMAN ] unable to re-register quorum device: device names do not match Sep 28 11:21:00 noracs1 qdiskd[3780]: <notice> Score sufficient for master operation (1/1; required=1); upgrading status reported is this: [root@noracs1 ~]# cman_tool status Version: 6.2.0 Config Version: 9 Cluster Name: clnacs Cluster Id: 6477 Cluster Member: Yes Cluster Generation: 56 Membership state: Cluster-Member Nodes: 2 Expected votes: 3 Quorum device votes: 1 Total votes: 3 Node votes: 1 Quorum: 2 Active subsystems: 9 Flags: Dirty Ports Bound: 0 177 Node name: iclnacs1 Node ID: 1 Multicast addresses: 239.192.25.102 Node addresses: 192.168.16.42 [root@noracs2 ~]# cman_tool status Version: 6.2.0 Config Version: 9 Cluster Name: clnacs Cluster Id: 6477 Cluster Member: Yes Cluster Generation: 56 Membership state: Cluster-Member Nodes: 2 Expected votes: 3 Quorum device votes: 1 Total votes: 3 Node votes: 1 Quorum: 2 Active subsystems: 9 Flags: Dirty Ports Bound: 0 177 Node name: iclnacs2 Node ID: 2 Multicast addresses: 239.192.25.102 Node addresses: 192.168.16.43 So it seems ok. This cluster is for testing with one service running now on node 1 so I can shutdown the node 2 and verify if it maintains correctly the quorum... But from an approach point of view are my steps correct/supported in my 5.8 config? Did it change anything in later versions such as rh el 6.3 or Fedora 17? Thanks in advance Gianluca -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
