Aaron Bush schrieb:
I then noticed that my ILO clones were starting on the 'wrong' nodes.
As in the stonith resource to kill node 2 was actually running on node
2; which is pointless if node 2 locks up. So I added resource
constraints to force the stonith clone to stay on a node that was not
the one to be shot. This seemed to work well.
Dejan,
is self-stonithing possible meanwhile? How is the problem of a one-node
cluster solved?
Often discussed, but I don't know the current status.
The next issue I have is that when I disconnect the LAN cable on a
single node that connects it to the rest of the network the clone
stonith monitor will fail since it can't connect to the other nodes ILO
for status. After some time (minutes let's say) I reconnect the LAN
cable but never see the clone stonith come back to life, just stays
failed. What should I be looking at to make sure that the clone stonith
restarts properly.
There is something I don't understand: You cut the network connection to
the ILO only?
If yes, than the monitor action of the stonith plugin gets a failure and
you can/have to react
on that as usual. In your case: Ignore the failue and try again further.
You can't do something better,
besides to raise redundancy, IMHO.
Any advice on how to more properly setup an HP ILO stonith in this
scenario would be greatly appreciated. (I can see where a clone stonith
would be useful in a large cluster of n>2 nodes since all nodes could
have a chance to shoot a failed node and maybe this is the reason for
cloned stonith with ILO? Basically in a cluster of N nodes each node
would be running N-1 stonith resources, ready to shoot a dead node.)
That is exactly my knowledge/assumption, which doesn't mean anything. :-)
In a two-node-cluster you can IMHO also work with simple
stonith-primitives and appropriate
location constraints. Dejan: Is that assumption correct?
Another questions to Dejan in that context: What has to be done to make
a stonith plugin clone-aware?
Is it right that someone can create a chain of stonith plugins/methods?
(More parallel weapons to shoot with?)
Best regards
Andreas Mock
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