Werner Flamme [07.09.2009 11:06]:
Jim Avery [07.09.2009 10:03]:
2009/9/5 Werner Flamme werner.fla...@ufz.de:
Hi,
I want to check a cluster consisting of 2 nodes. The task is simple:
show how many nodes are up (respective down, there are two nodes).
The command definition is:
$USER1$/check_cluster2 -h -l $HOSTALIAS$ -w 1 -c 2 -d $ARG1$
So, the host alias of the cluster will be the label, the plugin should
give a warning when 1 node is down, and should cry critical when
both nodes are down.
That's what I thought this command would do.
And that's what I read in the mean time:
CLUSTER OK: FW-Cluster: 1 up, 1 down, 0 unreachable
Sorry? Why is 1 down not seen as warning? What do I do wrong?
TIA
Werner
I'm not familiar with check_cluster2, but came across a similar
situation when using check_cluster for a host check recently. When I
run check_cluster --help, it tells me :-
See:
http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT
for THRESHOLD format and examples.
I found I had to use -w 0 -c 1 to make the plugin behave how I
wanted (warn if one host is down and critical if two are down).
Good graciuos ;-) - it never occured to me when reading
-w, --warning=THRESHOLD
Specifies the range of hosts or services in cluster that must be in
a non-OK state in order to return a WARNING status level
that a THRESHOLD of zero hosts means 1 host. But this really seems to
work, since when both nodes were down (yesterday afternoon and this
morning), the status finally changed to WARNING.
All right, I changed -w 1 -c 2 to -w 0 -c 1. I still wonder how we
managed to get the alarms on the other clusters weeks ago :-(
Also, if you're using this as a host check (not a service check) note
that if the host check returns a warning state, Nagios will usually
interpret this to mean that the host is 'UP'. See
http://nagios.sourceforge.net/docs/3_0/hostchecks.html for an
explanation of how plugin results are interpreted for host checks in
Nagios.
Thanks - lucklily we use a test that only returns OK and CRITICAL.
Thanks for the hint - I think one of the nodes might fall down any
minute now, I will tell if this works ;-)
OK, the node was up longer than expected ;-) - but it worked with -w 0
-c 1: one node down causes WARNING state!
Thank you very much!
Regards
Werner
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