check_by_ssh

[James]

Robert Cole wrote:
> I tried the multiple v's:
>
> nagios at ms1 ~ $ /usr/nagios/libexec/check_by_ssh -H remotecomputer -i 
> -vvvv ~/.ssh/id_dsa -C "/usr/nagios/plugins/check_swap -w 50% -c 10%"
> Enter passphrase for key '/home/nagios/.ssh/id_dsa':
> nagios at ocmp0's password:
>
> Didn't give me anymore output but as I mentioned doing it via just ssh 
> works:
>
> nagios at ms1 ~ $ ssh -i .ssh/id_dsa remotecomputer 
> "/usr/nagios/plugins/check_swap -w 50% -c 10%"
> SWAP OK - 100% free (1996 MB out of 1996 MB) |swap=1996MB;998;199;0;1996
> nagios at ms1 ~ $
>
> -rw-r--r-- 1 nagios nagios  615 Jun  8 07:03 authorized_keys
> -rw------- 1 nagios nagios  736 Jun  8 05:12 id_dsa
> -rw-r--r-- 1 nagios nagios  614 Jun  8 05:12 id_dsa.pub
> -rw-r--r-- 1 nagios nagios 1270 Jun 15 10:21 known_hosts
>
> and I did try doing /home/nagios/.ssh/id_dsa and it didn't make a 
> difference. It looks like a problem with check_by_ssh itself doesn't it?
>
here's the exact procedure i use for check_by_ssh

1.  As root user on nagios server:
     shell> sudo -u nagios ssh-keygen
     create the rsa keys in /home/nagios/.ssh/id_rsa
     make sure when prompted to put a password to user you leave it blank

2.  As root user on nagios server:
     shell> sudo -u nagios ssh user at remotehost
     This will give the remotehost the signature of the local nagios 
user in the machine.

3.  As user on remote host:
     shell> ssh-keygen
     create the ssh keys in /home/user/.ssh/id_rsa
     shell> touch /home/user/.ssh/authorized_keys2

4.  Copy identity key from nagios server to remote host:
     From nagios server:
     shell> scp /home/nagios/id_rsa.pub user at remotehost:/home/user/ 
<mailto:remotecmd at remotehost:/home/remotecmd/>
     From remote server:
     shell> cat /home/user/id_rsa.pub >> /home/user/.ssh/authorized_keys2

As root on remote server:
     shell> visudo
     Now enter the sudo line for user to the command you wish nagios to run:
     Example:
     user       ALL = NOPASSWD: /usr/local/nagios/libexec/check_ping

5.  Make a new Nagios command:
     /usr/local/nagios/libexec/check_by_ssh -H $HOSTADDRESS$ -l user -i 
'/home/nagios/.ssh/id_rsa' -C 'path of nagios plugin on remote host'
     Example:
     /usr/local/nagios/libexec/check_by_ssh -H $HOSTADDRESS$ -l user -i 
'/home/nagios/.ssh/id_rsa' -C \
    '/usr/local/nagios/libexec/check_graph_uptime.pl -H $HOSTADDRESS$ -C 
$ARG1$ -g -f -w -S $ARG2$ -c $ARG3$'


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