[Nagiosplug-help] check_by_ssh

Gavin Snelgrove gavin.snelgrove at gmail.com
Thu Apr 24 22:40:56 CEST 2008


I am trying to get the check_by_ssh plug-in to work but seem to be having
some issues

Nagios is working fine and I followed this guide to get it working in Ubuntu

I have been following this link as my guide for check_by_ssh.

The Remote server is running CentOS 5. I used the RPM package on the
following link to install the plug-ins on the remote server.  (Do I need the
check_by_ssh plug-in to be installed on the remote server as well?)

I have gotten the SSH public key working so that I can connect via SSH as
the Nagios user without a password.

In the Nagios Web interface I see the following error:
(Return code of 127 is out of bounds - plugin may be missing)

In the Nagios logs I see the following error:
[1209068727] Warning: Return code of 127 for check of service 'SSH Check
Disk' on host 'host.domainname.com' was out of bounds. Make sure the plugin
you're trying to run actually exists.

I don't want to provide too much information right off the start.  Let me
know what else you need or if you have any suggestions as to what I should

Thank You,

>From the check_by_ssh guide in the link above this is my altered version of
the script they give:

# Usage:\n   cbs.sh <testname>\nPossible valid testnames: load, proc, disk,
swap, user.
LDOPTS="-w 15,10,5 -c 30,25,20"
DSKOPT="-w 20 -c 10 -p /dev/sda2"
PROPTS="-w 150 -c 200"
SWOPTS="-w 15 -c 5"
USOPTS="-w 20 -c 50"
SSHOPT=`echo $SSH_ORIGINAL_COMMAND | { read first last; echo $last; }`
if [ -z $SSHOPT ]; then
case $SSHOPT in
        load | LOAD ) RET=`${PATH}load $LDOPTS` ; x=$? ;;
        disk | DISK ) RET=`${PATH}disk $DSKOPT` ; x=$? ;;
        proc | PROC ) RET=`${PATH}procs $PROPTS` ; x=$? ;;
        swap | SWAP ) RET=`${PATH}swap $SWOPTS` ; x=$?  ;;
        user | USER ) RET=`${PATH}users $USOPTS` ; x=$? ;;
        * ) RET="Invalid check command: $SSHOPT" ; x=2 ;;
echo $RET
exit $x
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