[DRBD-user] DRBD 9pre4 + OCFS2

Arthur Fernandes Silva arthurafs at yahoo.com.br
Wed Jun 5 16:14:26 CEST 2013

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Dear DRBD users,

        I'm testing DRBD 9 always using the latest source code in order 
test the environment and put it in production as soon as the code is 
stable enough.
        My initial problem is: my scenario demands at least 3 nodes and 
2 primaries nodes, using a Distributed File system (I have choose 
ocfs2). I have already configured the nodes and the sincronization and 
the file system locking is working fine, but I couldn't find on DRBD 9 
and 8.4 manuals the procedure to safely shutdown a primary node (without 
produce a split-brain behavior) and to shutdown all nodes without furter 
problems like nodes with standalone connections, outdate or inconsistent 
disk states.
         For example: when I want to shutdown all nodes I do the 
following steps:
                                   1. umount file system in all nodes  
(umount /<mount-point>
                                   2. shutdown the ocfs cluster 
(/etc/init.d/o2cb unload)
                                   3. shutdown the drbd cluster (drbadm 
down <resource>)
         But when I restart I get this situation (1 node 
primary,uptodate and 2 nodes inconsistent,standalone) and the procedure 
"--discard-my-data" as stated on manuals doesn't work as supposed to and 
the only way to get all nodes working is recreating the metadata for 
secondary nodes.
         So bottom line: How to shutdown 1,2 or all nodes in a 
drbd9/primary-primary/3-nodes scenario without any problems?

Thanks in advance,

Arthur Fernandes.

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