[Nagios-users]

[Tedman Eng]

Some things to check:
NOTE: All commands must be run in context of the nagios server's user, the
first command may be omitted if this is the case already. This is especially
important not because of execute permissions, but because of ssh keys that
get passed and checked


Verify paswordless (ie publickey) login from Nagios server
----------------------------------------------------------
root at nagios-server# su to <nagios user>
nagios at nagios-server# ssh -l <remote-user> <remote-host> 

Public key MUST be set up for automated checks to work - if you have to
enter a password, it WILL NOT work under any circumstances.  Once logged in,
try running the check command and make sure it executes properly as the
remote-user

nagios at remote-host# /usr/local/nagios/libexec/check_disk -w 10 -c 8 -p
/;echo $?
DISK OK [1819196 kB (95%) free on /dev/sda2]
0


Verify check_by_ssh from Nagios server
----------------------------------------------------------
root at nagios-server# su to <nagios user>
nagios at nagios-server# /usr/local/nagios/libexec/check_by_ssh -l nagios -H
localhost -C 'echo OK;exit 0'; echo $?
OK
0

nagios at nagios-server# /usr/local/nagios/libexec/check_by_ssh -l nagios -H
localhost -C 'echo CRITICAL;exit 2'; echo $?
CRITICAL
2

Once this works, then you can substitute the actual plugin and try again.

If the above does not work, check that your remote-host ssh configuration
does not use login banners, or use a newer version of the check_by_ssh
plugin that support suppression of login banners.


-----Original Message-----
From: Sam Stave [mailto:sam_stave at yahoo.com]
Sent: Monday, August 16, 2004 1:57 PM
To: nagios-users at lists.sourceforge.net
Subject: [Nagios-users] Re: [Nagios-users]


Jeff,

I can run the command by hand and get the same result:

I posted on this earlier but still havent found the
issue. I run the check_by_ssh command by hand and it
drops back to command prompt with two blank lines.
When Nagios actually runs the command it states
"plugin returned no data"

I have actually been able to run it and get data on
CLI - but get no data when run by Nagios....

Here is my previous post;

I am attempting to do the following with check_by_ssh
- and it doesnt seem to work:

from the nagios server:

./check_by_ssh -l nagios -H 10.x.x.x -C
'/usr/local/nagios/libexec/check_disk -w 10 -c 8 -p /'

If I run this manually - it prompts me for the
password, then just drops back to a prompt.... so I
get no return of data....

if i actually run the entire command manually -
meaning  log into the remote host via ssh as the user,
and then run the check_disk cmd - it works fine.... so
i know there isnt some sort of permissions issue
etc...


----

Someone had mentioned that I needed to get ssh keys
set to do this. I did that but still got the same
result - dropping back without any data returned.

Thanks

Sam




> Sam,
> 
> I don't have any issues with docs, it all worked
> fine for myself, with  
> very little effort....
> 
> Anyway, wanted to let you know there is no issue
> with checking from  
> Solaris via SSH, thats all I do.  I have a Solaris8
> based Nagios Server,  
> and about 75 monitored hosts, and 500-600 service
> checks, almost all  
> checked via ssh.  (I'm actually having more issues
> with my Redhat 9  
> server, than any of my solaris systems.)  I'm
> working on a set of service  
> checks that run via SSH only, but don't require any
> processes or scripts  
> on the remote end, except for standard unix
> commands.  That way the  
> service checks don't have to be compiled on every
> host.  And my vendors  
> can't complain about "3rd party" software running on
> production systems.
> 
> Can you run the checks manually by hand?
> 
> Good Luck,
> Jeff
> 



	
		
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_______________________________________________
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::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null