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Re: [Linux-cluster] CLVMD hangs on 2nd node startup and hangs all gfs nodes.



If you suspect a problem with clvmd, you could simply remove it from the equation and retest, right?

You could just use the underlying iSCSI device and mkfs.gfs on that.... at least for testing if clvmd is the problem.

I suppose you could also test if clvmd is the problem by testing the logical volumes without GFS in the mix.  IOW, create some LVs and read/write to them at the same time from different machines.  If this is working, the file system should work.  If the file system doesn't, then the problem is probably higher up than clvmd.

 brassow

On Apr 25, 2008, at 11:34 AM, Tracey Flanders wrote:
I've been trying to setup a 3 server cluster with GFS mounted over iSCSI on Qemu Virtual Machines. A 4th server acts as a iSCSI Target. I found and article that explains my issue, but I can't seem to figure out what the solution is. QUOTED from :http://kbase.redhat.com/faq/FAQ_51_10923.shtm After successfully setting up a cluster, cman_tool shows the cluster is healthy. Mounting the gfs mount on the first node works successfully. However, when mounting gfs on the second node, the mount command hangs. Writing to a file on the first node also hangs. On the second node, the following error is seen in /var/log/messages: Jul 18 14:49:27 blade3 kernel: Lock_Harness 2.6.9-72.2 (built Apr 24 2007 12:45:55) installed Jul 18 14:49:27 blade3 kernel: GFS 2.6.9-72.2 (built Apr 24 2007 12:46:12) installed Jul 18 14:52:53 blade3 kernel: GFS: Trying to join cluster "lock_dlm", "vcomcluster:testgfs" Jul 18 14:52:53 blade3 kernel: Lock_DLM (built Apr 24 2007 12:45:57) installed Jul 18 14:52:53 blade3 kernel: dlm: connect from non cluster node Jul 18 14:52:53 blade3 kernel: dlm: connect from non cluster node END QUOTE My Virtual Machines only have one interface so I still can't figure out why this is happening. I can successfully mount the GFS partition on any one node but as soon as I try to start the clvmd on a 2nd node it hangs the whole cluster. I'm wondering if its a Qemu VM network issue? Each host can ping each other by name and ip. The cluster works fine but I cant get GFS to work on th VMs. Is it possible to debug the clvmd to see what IP Address it is sending? Thanks, Tracey Flanders 

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