using NPRE to monitor pbs_mom. Error: "NRPE: Unableto read output"

[Seth Simmons]

The filename you specified is check_pbsmom.sh though your command shows
check_pbsmom

 

 

From: Rahul Nabar [mailto:rpnabar at gmail.com] 
Sent: Thursday, January 22, 2009 4:05 PM
To: Nagios-Users Mailinglist
Subject: [Nagios-users] using NPRE to monitor pbs_mom. Error: "NRPE:
Unableto read output"

 

I'm a bit confused about how exactly to add stuff with NRPE to monitor
local services on my remote hosts. I got the basics out of the way and I
can already monitor the easy stuff like users, procs, swap etc. 

More ambitiously, I wanted to monitor the status of my "pbs_mom" (Torque
Scheduler daemon) on each node in my cluster. I found the script
check_pbsmom.sh on the NagiosExchange (snippet below) and copied it to
my /usr/local/nagios/libexec. 

Then I added this line to my nrpe.cfg

command[check_pbsmom]=/usr/local/nagios/libexec/check_pbsmom

But then I don't seem to have much success.
remotehost>/usr/local/nagios/libexec/check_nrpe -H localhost -c
check_pbsmom
NRPE: Unable to read output

If I just run the shell script though it seems to be working
/usr/local/nagios/libexec/check_pbsmom.sh 
PBS_MOM OK:  Daemon is running.  Host is listening.


What am I doing wrong here! I'm still a bit confused about the
interaction between command.cfg on the monitoring machine and the
nrpe.cfg on the remote host.

Any advice?

-- 
Rahul

#!/bin/bash
# SYNOPSIS
#       check_pbsmom [<TCP port>] [<TCP port>] ...
#
# DESCRIPTION
#       This NAGIOS plugin checks whether: 1) pbs_mom is running and
#       2) the host is listening on the given port(s).  If no port
#       number is specified TCP ports 15002 and 15003 are checked.
#
# AUTHOR
#       Wayne.Mallett at jcu.edu.au

OK=0
WARN=1
CRITICAL=2
PATH="/bin:/sbin:/usr/bin:/usr/sbin"

# Default listening ports are TCP 15004 and 42559.
if [ $# -lt 1 ] ; then
  list="15002 15003"
else
  list="$*"
fi

if [ `ps -C pbs_mom | wc -l` -lt 2 ]; then
  echo "PBS_MOM CRITICAL:  Daemon is NOT running!"
  exit $CRITICAL
else
  for port in $list ; do
    if [ `netstat -ln | grep -E "tcp.*:$port" | wc -l` -lt 1 ]; then
      echo "PBS_MOM CRITICAL:  Host is NOT listening on TCP port $port!"
      exit $CRITICAL
    fi
  done
  echo "PBS_MOM OK:  Daemon is running.  Host is listening."
  exit $OK
fi
 

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