Remote commnad execution failed

[lgitten]

I'm using SSH Proxy wizard to connect to remote Linux RHEL 5.5 host to get statistics.
However, the service status for my host shows me the following:

Check breeze
Unknown 27m 46s 4/4 2012-02-28 08:21:19 Remote command execution failed: bash: /usr/local/nagios/libexec/check_breeze: No such file or directory

Check Load
Unknown 28m 53s 4/4 2012-02-28 08:25:12 Remote command execution failed: bash: /usr/local/nagios/libexec/check_load/: No such file or directory

Check Log
Unknown 28m 20s 4/4 2012-02-28 08:25:45 Remote command execution failed: bash: /usr/local/nagios/libexec/check_log/: No such file or directory

Check nwstat
Unknown 27m 13s 4/4 2012-02-28 08:21:52 Remote command execution failed: bash: /usr/local/nagios/libexec/check_nwstat/: No such file or directory

Current Users
Unknown 26m 40s 5/5 2012-02-28 08:23:25 Remote command execution failed: bash: /usr/local/nagios/libexec/check_users: No such file or directory

Mrtg
Unknown 26m 6s 4/4 2012-02-28 08:22:59 Remote command execution failed: bash: /usr/local/nagios/libexec/check_mrtg/: No such file or directory

Mrtgtraf
Unknown 25m 33s 4/4 2012-02-28 08:23:32 Remote command execution failed: bash: /usr/local/nagios/libexec/check_mrtgtraf/: No such file or directory

Ping
Ok 25m 0s 1/5 2012-02-28 08:21:05 OK - 10.70.10.16: rta 1.157ms, lost 0%

Root Disk Space
Unknown 24m 26s 5/5 2012-02-28 08:25:39 Remote command execution failed: bash: /usr/local/nagios/libexec/check_disk: No such file or directory

Total Processes
Unknown 28m 36s 5/5 2012-02-28 08:21:06 Remote command execution failed: bash: /usr/local/nagios/libexec/check_procs: No such file or directory

It appears that /usr/local/nagios/* directory does not even exist on the remote host.
Am I missing smth. that needed to be installed on the remote host besides just creating "nagios" user account and setting up passwordless ssh access to that account?

Thanks.

[scottwilkerson]

You will need to install any plugins you would like to use on the machine you are connecting to.

You can get the most common pre-installed plugins from http://nagiosplugins.org/ and others from the Exchange
http://exchange.nagios.com

[lgitten]

Where do I install these plugin on the remote host? Which directory it should be installed in?
I presume I just need to copy these plugins on remote host without installing, correct?
Can I copy these plugins from the server monitoring host to remote host?

Thanks.

[scottwilkerson]

These would need to be compiled on the remote host

Something like

Code: Select all

tar -xzf "nagios-plugins-1.4.15.tar.gz"
cd "nagios-plugins-1.4.15"
./configure
make clean
make
make install

[lgitten]

I successfully installed nagios plugins on remote host, however it's still complaining that "remote command execution failed: bash:/usr/local/nagios/libexec/*"
Do I need to restart anything on monitoring host to see it now?

Thanks.

[lmiltchev]

OK, let's try something simple. Run the following commands and post the output:

On your remote machine run in terminal:

Code: Select all

/usr/local/nagios/libexec/check_users -w 2 -c 5

On your nagios server run in terminal:

Code: Select all

su nagios
ssh nagios@<your_remote_machine_IP>

[scottwilkerson]

Also, you need to make sure each of the items you are checking exist

The plugins info I gave you is for the basic plugins... On the remote host can you run:

Code: Select all

ls -l /usr/local/nagios/libexec/

[lgitten]

Both of these commands work fine!
Interestingly enough, root disk space check on remote host works and ping works, but check_load, check_log, nwstat give this error:
"Remote command execution failed: bash: /usr/local/nagios/libexec/check_load/: Not a directory"
I made sure that check_load plugin does exist on remote host in /libexec/
Also Check breeze complains that "Host name/address not specified"


Thanks.

[lgitten]

Yes, all these plugins do exist on remote host in /libexec/

Also, you need to make sure each of the items you are checking exist

The plugins info I gave you is for the basic plugins... On the remote host can you run:

Code: Select all

ls -l /usr/local/nagios/libexec/

[scottwilkerson]

Looking back at your errors I can see the problem for most of them. One was an error we had in the defaults for the wizard, which was recently fixed and you can download the new wizard at
http://exchange.nagios.org/directory/Ad ... rd/details
and upload through Admin -> Manage Config Wizards

This fixes an erroneously placed / in the default check users command.

The others look to be a configuration problem when you set them up. For each command you need to provide all of the required args, for example you cannnot just enter

Code: Select all

/usr/local/nagios/libexec/check_breeze 

you would need to enter

Code: Select all

/usr/local/nagios/libexec/check_breeze -H 192.168.5.1 -w 80 -c 90

the easiest way to make sure you have everything is to run them from the command line on the remote host to make sure you are getting the expected result. If you don't know what is required most can be run with the -h to get a help list.

Several of your commands have a trailing / which is not correct, ie. These are incorrect

Code: Select all

/usr/local/nagios/libexec/check_load/
/usr/local/nagios/libexec/check_log/
/usr/local/nagios/libexec/check_nwstat/
/usr/local/nagios/libexec/check_mrtg/
/usr/local/nagios/libexec/check_mrtgtraf/

And will need to be each edited in the Core Config Manager to remove the extra /

for the /usr/local/nagios/libexec/check_users you should edit it in the Core Config Manager
you likely have

Code: Select all

/usr/local/nagios/libexec/check_users /

but it should be

Code: Select all

/usr/local/nagios/libexec/check_users

This one was the wizards fault..