check_by_ssh anomaly

[Daniel Tandowski]

I appreciate your quick response, ssh known_hosts / authorized_keys was my 
first culprit also... unfortunately, this doesn't explain why it would work 
correctly when I run the same command nagios is running from the CLI (using 
the same key)!? 

#/usr/lib/nagios/plugins/check_by_ssh -t 60 -H <IP-Address> -l root -i
<RSA Key> -C /usr/lib/nagios/plugins/check_backup_log


Daniel

On Friday 01 June 2007 00:53, you wrote:
> It looks like your host key for this host is probably invalid. When this
> happens, ssh will display an error like this:
>
> @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
> @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
> @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
> IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
>
> If you're sure that nobody is "doing something nasty", fix your host key
> and all should be well. Just remove the key from ~/.ssh/known_hosts and
> either ssh to the host and answer "yes" to accept the key, or do
> "ssh-keyscan -t rsa hostname" (or dsa if you're using dsa keys).
>
> Hope this helps!
>
> Rob
>
> *--
> Robert King*
> UNIX Systems Administrator
> /Publishing Technology plc/
> T: +1 401 331 2014 x120
> F: +1 401 331 2015
> robert.king at publishingtechnology.com
> <mailto:robert.king at publishingtechnology.com>
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> GPG Public key: http://tinyurl.com/9zmws
>
> Daniel Tandowski wrote:
> > Hi all, long time Nagios user, first time poster.
> >
> > I'm having an issue with one of my check_by_ssh scripts - which basically
> > just checks the size and modified time of a backup file on each of
> > roughly 70 Linux hosts.
> >
> > All of the hosts are working correctly, except one, which as far as I can
> > tell, is configured the same as the rest.  This is where it gets wierd,
> > when I run the full command straight from the CLI, it returns correctly:
> >
> > Command:
> > #/usr/lib/nagios/plugins/check_by_ssh -t 60 -H <IP-Address> -l root -i
> > <RSA Key> -C /usr/lib/nagios/plugins/check_backup_log
> >
> > Result:
> > OK: /home/user/file.backup.gz Size: 72.99Mb Updated: 13.92 hours ago
> >
> > However, when it runs from within the nagios process, the web interface
> > returns this:
> >
> > Remote command execution failed:
> > @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
> >
> > Has anyone come across this problem? As Google won't let me search @'s -
> > it is extremely difficult to search this issue!
> >
> > Sorry about the long email, please let me know if you have any ideas!
> >
> > Thanks,
> >
> > Daniel
> >
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