check_cpu.sh

It requires sysstat package for iostat

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Hi
Is there any reason it print such a huge user percent of 5599%
nagios@cubic:~> ./chk_perf_cpu.sh -uw 70 -iw 95 -sw 85 -uc 80 -ic 98 -sc 95 -n 5
CPU CRITICAL : user=5599% system=10% iowait=88% idle=2% | cpu_user=5599%;70;80; cpu_sys=10%;85;95; cpu_iowait=88%;95;98; cpu_idle=2%;
nagios@cubic:~>

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Good plugin. I use it on my job.

I found a little difference in my environment iostat results.

I'll try to explain it showing you modified lines:

1) idle parameter position:

CPU_IDLE=`echo $CPU_REPORT | cut -d ";" -f 7`

2) test for thresholds:

if [[ $CPU_IOWAIT > $IO_CPU_C || $CPU_USER > $U_CPU_C || $CPU_SYSTEM > $S_CPU_C ]];
then
echo "CPU CRITICAL : user=${CPU_USER}% system=${CPU_SYSTEM}% iowait=${CPU_IOWAIT}% idle=${CPU_IDLE}% | cpu_user=${CPU_USER}%;${U_CPU_W};${U_CPU_C}; cpu_sys=${CPU_SYSTEM}%;${S_CPU_W};${S_CPU_C}; cpu_iowait=${CPU_IOWAIT}%;${IO_CPU_W};${IO_CPU_C}; cpu_idle=${CPU_IDLE}%;"
exit $STATE_CRITICAL
fi

...and obviously for WARNING test.

P.S.
I use zLinux servers in OS/390 environment.
my uname is:
2.6.18-194.el5 #1 SMP Tue Mar 16 22:05:06 EDT 2010 s390x s390x s390x GNU/Linux

Hope it helps.
Paolo

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The script is really good.

Just few updated needed:

as the new version is using vmstat and not iostat, so it would be nice to check vmstat:

here is my modification:

#IOSTAT=/usr/bin/iostat
VMSTAT=/usr/bin/vmstat

and the check:

# if [ ! -x $IOSTAT ]; then
if [ ! -x $VMSTAT ]; then
# echo "UNKNOWN: iostat not found or is not executable by the nagios user."
echo "UNKNOWN: vmstat not found or is not executable by the nagios user."
exit $STATE_UNKNOWN
fi

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works remotely through nrpe. can be graphed with pnp4nagios, does execute from command line ./check_cpu.sh but doesn't work locally when defined in nagios services and commands says (timeout) that's at least on gentoo.

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