[Pacemaker] trigger STONITH for testing purposes

[Andrew Beekhof]

On Wed, May 20, 2009 at 1:31 AM, Bob Haxo <bhaxo at sgi.com> wrote:
> Greetings,
>
> I liked the idea of not starting the cluster at boot, and found that the
> fenced node would reboot and then openais start brought the node onboard
> without triggering a reboot of the already running node.
>
> Then magic happened.  I chkconfig'd openais to start with boot, re-ran the
> "ifdown eth0" command that had been triggering STONITH and then the STONITH
> deathmarch, and, well, everything worked.  I've done this test many 10s of
> times without a STONITH deathmarch.
>
> Unfortunately, I haven't a clue as to what was changed that cleared the
> issue.

At a guess, I'd say you removed no-quorum-policy=ignore
OpenAIS based clusters don't pretend they have quorum when only 1 of
the 2 nodes is available (and you cant start shooting until you have
quorum or the above option is set).


>
> Thanks for all the suggestions.
>
> Cheers,
> Bob Haxo
>
>
> On Tue, 2009-05-19 at 14:03 +0200, Andrew Beekhof wrote:
>
> On Mon, May 18, 2009 at 8:12 PM, Bob Haxo <bhaxo at sgi.com> wrote:
>>
>> Any suggestions as to what needs changing so that the stonith deathmarch
>> can
>> be avoided?
>
> If you only have two nodes, the only two ways have already discussed:
> use poweroff, or don't start the cluster at boot.
> If you don't want to do either of those, the only way to terminate the
> stonith loop is to fix the network failure.
>
> If you had 3 or more nodes, the returning node wouldn't have quorum
> and therefore wouldn't be allowed to shoot anyone.
>
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