Checking for VNC(or arbitrary TCP service)

[Balestra, Roberto]

Hi David,
check_tcp command is defined as
 $USER1$/check_tcp -H $HOSTADDRESS$ -p $ARG1$
in chkcommand.cfg file.

In your service definition for your server 1.1.1.1, you have set "check_command" parameter to 
   check_tcp!5900

Nagios gets $HOSTADDRESS$ from your configuration files (hosts.cfg), and matches $ARG1$ with 5900.
Every ! is a separator for argument to pass to command.

So you have:
hosts.cfg
define host{
  use ...
  host_name   yourhost
  address     1.1.1.1
  alias       ....
  ....
}

chkcommand.cfg
define command{
  command_name	check_tcp
  command_line    $USER1$/check_tcp -H $HOSTADDRESS$ -p $ARG1$
}

services.cfg
define service{
  use ...
  host_name            yourhost
  servicedescription   Check VNC (if you like it)
  check_command        check_tcp!5900
  ....
}
bye
	Roberto

> -----Original Message-----
> From: nagios-users-admin at lists.sourceforge.net
> [mailto:nagios-users-admin at lists.sourceforge.net]On Behalf Of D.S.
> Sent: mercoledì 18 maggio 2005 17.58
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] Checking for VNC(or arbitrary TCP service)
> 
> 
> Hello I'm new to nagios, but thanks to some help from the list, and a
> lot of reading I've got it up and running and monitoring the first few
> services!!  I'm interested in montoring a VNC process which 
> will require
> a TCP connection to port 5900...
> 
> ./check_tcp -h
> 
> Doesn't seem to give me the format that I expect to use in 
> services.cfg
> (check_tcp!whatever!stuff).. How would I go about monitoring port 5900
> on host 1.1.1.1 ? 
> 
> I tried looking for services.cfg examples of something akin 
> to this but
> I just don't see how the !! syntax translates into the " check_tcp -H
> host -p port " type of syntax -h gives.  What are the !'s anyway?
> 
> Any help would be appreciated.
> 
> --David
> 
> 
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