Problem running ssh script in nagios

[Charlie R]

Please disregard, turned out I needed to add a full path to my ssh  
config file :/

Charlie

On Nov 9, 2010, at 4:07 PM, Charlie R wrote:

> Hi List,
>
> Before we start, check_ssh and check_by_ssh is not a workable  
> solution for me. I have a special setup in place that needs to run  
> checks over native ssh since I have a bunch of ssh config options  
> per host and need to use a proxy from where my nagios server is. So  
> far what I have found doesn't let me use my ssh config file. My goal  
> is to use ssh to check for host uptime since that's available on  
> every host.
>
> I wrote a script that is very very basic. It's job is to ssh to a  
> host to determine if it's up or down. Here's the meat and potatoes  
> of that.
>
> --- checkhost.sh ---
> #!/bin/bash
>
> # Purpose: Replacement host alive check for nagios
> # on hosts that cannot be directly pinged
>
> # Usage function
> usage()
> {
> cat << EOF
>
> usage: checkhost.sh -H <host>
>
> OPTIONS:
> 	-h	Show this message
> 	-H	SSH host address
> EOF
> }
>
> # Variables
> SSHPath='/usr/bin/ssh'
>
> # Options menu
> while getopts "hH:" OPTION
> do
> 	case $OPTION in
> 		h)
> 			usage
> 			exit 1
> 			;;
> 		H)
> 			SSHHost=$OPTARG
> 			;;
> 		?)
> 			usage
> 			exit 1
> 			;;
> 		esac
> 	done
>
> # Make sure the required stuff is here
> if [[ -z $SSHHost ]]
> 	then
> 		usage
> 		exit 1
> 	fi
>
> # Connect function
> SSHConnect()
> {
> $SSHPath -q $SSHHost exit
> if [[ "$?" -eq 0 ]]
> 	then
> 		echo "Host is reachable"
> 		exit 0
> 	else
> 		echo "Unable to reach host"
> 		exit 2
> 	fi
> }
> SSHConnect
> --- end script ---
>
> When I run this script on my bash shell, it works perfect. When I  
> run this as a host check in nagios, it fails with (Return code of  
> 255 is out of bounds).
>
> I've checked to make sure it's not getting prompted to accept the  
> local host key.
> I've checked nagios.debug to make sure the command is parsing  
> correctly
> I've checked ssh key permissions
> I've changed my ssh code around to return something no matter what  
> and it works.
>
> At this point, I'd like to blame ssh but I'm not 100% sure on that.
>
> Is there any caveats to run SSH on the native system with ssh keys  
> and a more than customized ssh config file? Maybe I'm missing a ssh  
> option? I've tried with and with out -T and -t. I've specifcally  
> specified my config file along with my ssh keys.
>
> Thanks,
>
> Charlie


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