On 2/17/12 4:19 AM, Lawrence Strydom wrote:
Hi List,
I used DRBD in dual primary mode with ocfs2 for my load balancing web
server cluster. I didn't encounter any errors during setup and when I
put the web site on the DRBD device on the primary node, it replicated
without any errors. It has been running fine during the week of
testing but this morning when we updated code located on the DRBD
device we noticed it was not replicating to the secondary node.
the DRBD device was mounted on both nodes but /proc/drbd output this:
*version: 8.3.7 (api:88/proto:86-91)
GIT-hash: ea9e28dbff98e331a62bcbcc63a6135808fe2917 build by
[email protected], 2012-01-10 09:54:40
0: cs:StandAlone ro:Primary/Unknown ds:UpToDate/DUnknown r----
ns:0 nr:0 dw:5960937 dr:5047235 al:1490 bm:1363 lo:0 pe:0 ua:0
ap:0 ep:1 wo:b oos:8840028*
So you have a split brain, i think - you didn't post the drbd output
from the other node, so that's just an educated guess.
shutdown ocfs2/o2cb on one node, and follow this:
http://www.drbd.org/users-guide/s-resolve-split-brain.html
then validate both are primary/uptodate and restart your filesystem
clustering.
You will need to post all the drbd logs from both boxes to understand
what root cause is. You are running a oldish version of drbd, plus you
didn't indicate what your os/kernel was.
David
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