From: Gordan B. <go...@bo...> - 2008-02-11 01:12:26
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Hi, Just a brief update. I now have OSR booting off DRBD. The thing that has been driving me nuts since Friday is that DRBD cannot initialize until considerably later on in the boot-up process than iSCSI. It was a rather difficult issue to troubleshoot because whenever I manually ran the commands after GFS failed to mount (due to the absence of the underlying block device), DRBD initialized fine. But when I put the same set of initialization commands in the startup script, it silently failed. It only initializes properly just before the check for enough nodes in the cluster. I suspect this has someting to do with either the device nodes or the SCSI subsystem not being quite ready before that point. The only problem I can see with that is that it means that DRBD gets initialized _after_ LVM. Not a problem for me, but it could be a problem for some. Either way, I'm reasonably happy that it now works, so I'll be making and posting a patch tomorrow. :-) One unrelated problem I appear to have is that in a two_node cluster, the quorum check always seems to fail and asks for user confirmation that it's OK to start up. I'll look into it more closely tomorrow, but I can't see how it can be related to DRBD stuff. Is this a known/reported issue? Gordan |