On 2011-12-05T22:37:03, Andreas Kurz <[email protected]> wrote:
> Did you clone the sbd resource? If yes, don't do that. Start it as a
> primitive, so in case of a split brain at least one node needs to start
> the stonith resource which should give the other node an advantage ...
> adding a start-delay should further increase that advantage.
start-delay=20s or so is a recommended setting here, yes. A patch to
the external.c plugin to actually relay the "start" to the external/*
agent would be helpful, or perhaps just adding a 20s delay there
directly ... That'd auto-fix this for all users of sbd.
> >> * use a quorum node
> > i.e I should add another node(quorum node) in this two node cluster.
> Yes ... you can add a node in permanent standby mode or starting
> corosync without pacemaker should also work fine.
The latter is probably the better choice, otherwise the node will
participate in the DC elections.
Alternatively, with the more recent sbd versions, you could also have a
redundant network quorum device via iSCSI; that would prevent the node
which loses network connectivity from fencing the other, since it would
have committed suicide.
Regards,
Lars
--
Architect Storage/HA
SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB
21284 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde
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