On Wed, Aug 19, 2009 at 8:25 AM, Lon Hohberger<lhh@xxxxxxxxxx> wrote: > On Mon, 2009-08-17 at 16:59 -0500, Paras pradhan wrote: >> I have a 3 nodes cluster. >> >> Node A - Vote 1 >> >> Node B - Vote 1 >> >> Node C - Votes 2 >> >> Qdisk - Votes 3 >> >> >> Altogether the cluster has 7 votes. The required min quorum to run the >> cluster would be in this case 4. Now if I poweroff node 1, I can see >> Quorum Dissolved in the terminals of Node 2 and Node3 . This cluster >> has xen virtual machines. > > I assume node 1 == node A, node 2 == node B, node 3 == node C. > > >> Whats wrong and how to do debug the problem? > > Do they all "See" each other before you power off node 1 (where 1 == > A) ? Apart from having a node with 2 votes, the rest of the concept is > pretty similar to qdiskd's design for "all-but-1 die" case. > > Expected behavior is that any of the following constitutes a quorate > cluster: > > A+Qdisk (4 votes) > B+Qdisk (4 votes) > C+Qdisk (4 votes) > A+B+Qdisk (5 votes) > A+B+C (4 votes) > A+B+C+Qdisk (7 votes) > > Effectively, you want to look at 'cman_tool status'. Before losing a > node, you need to verify that each sees 7 votes. Yes before loosing a node.. its 7.. cman_tool status says its 7. Here is the output when all the nodes are active. On Node B or Node 2: root@cvtst2 ~]# cman_tool status Version: 6.1.0 Config Version: 54 Cluster Name: cvtst Cluster Id: 3338 Cluster Member: Yes Cluster Generation: 2068 Membership state: Cluster-Member Nodes: 3 Expected votes: 6 Quorum device votes: 3 Total votes: 7 Quorum: 4 Active subsystems: 10 Flags: Dirty Ports Bound: 0 11 177 Node name: cvtst2 Node ID: 1 Multicast addresses: x.x.x.x Node addresses: x.x.x.172 [root@cvtst2 ~]# Now Powered off node A or node 1. Here is the output. Version: 6.1.0 Config Version: 54 Cluster Name: cvtst Cluster Id: 3338 Cluster Member: Yes Cluster Generation: 2080 Membership state: Cluster-Member Nodes: 2 Expected votes: 6 Total votes: 3 Quorum: 2 Active subsystems: 10 Flags: Dirty Ports Bound: 0 11 177 Node name: cvtst1 Node ID: 2 Multicast addresses: x.x.x.x Node addresses: x.x.x.172 I have noticed after poweroff the total votes turns to 3 ( for few seconds), Then I see quoram dissolved . But afer few seconds the cluster is back and I can see the total votes to 6. What might be the issue here. > > -- Lon > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster > Thanks! Paras. -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
