On 03/15/2011 01:58 PM, Bazy wrote:
> Hi Mark,
>
> Yes, clustered file system is mandatory. Even with gfs(2) DRBD will
> not recover by itself from a split brain. I think specific options are
> needed in drbd.conf "after-sb-0pri after-sb-1pri after-sb-2pri", but
> don't know what the exact ones are.
>
> Best regards!
For the recovery;
resource r0 {
device /dev/drbd0;
net {
after-sb-0pri discard-zero-changes;
after-sb-1pri discard-secondary;
after-sb-2pri disconnect;
}
}
To tie it into fenced via cman (to fence instead of split-brain), also add:
resource r0 {
device /dev/drbd0;
disk {
fencing resource-and-stonith;
}
handlers {
outdate-peer "/sbin/obliterate";
}
}
You can download 'obliterate' from here:
http://people.redhat.com/lhh/obliterate
(found here: http://gfs.wikidev.net/DRBD_Cookbook)
See also:
http://www.drbd.org/users-guide/ch-rhcs.html
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