Problems with restarting service

Jason Martin jhmartin at toger.us
Tue Feb 3 00:54:09 CET 2004


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A nagios event handler can do anything you want; with nrpe you'd have to 
write a nrpe 'check' that actually bounces the service. 

- -Jason Martin

On Mon, 2 Feb 
2004, Neil wrote:

> This is very interesting. I thought, Nagios only do monitoring. Is it true 
> that nagios can restart a service using event handlers? What about services 
> on remote like Windows using NRPE? 
> 
> Thanks. 
> 
> 
> Chris Mason writes: 
> 
> > I have a server on which I am running nagios and a service similar to httpd. 
> > 
> > I want to restart the service should it stop responding. 
> > 
> > As a test, I have used httpd. 
> > 
> > Nagios is configured as follows:
> > /etc/nagios/services.cfg 
> > 
> > ...
> >         check_command                   check_http
> >         event_handler                   restart-httpd
> > ... 
> > 
> > /etc/nagios/checkcommands.cfg
> > ...
> > # 'check_http' command definition
> > define command{
> >         command_name    check_http
> >         command_line    $USER1$/check_http -H $HOSTADDRESS$
> >         }
> > ... 
> > 
> > /usr/lib/nagios/plugins/eventhandlers/restart_httpd
> > ...
> >                         # Call the init script to restart the HTTPD server
> >                         sudo /etc/init.d/httpd restart
> > ... 
> > 
> > I have sudo'ed the nagios user "nagios" as follows
> > # Cmnd alias specification
> > Cmnd_Alias      HTTP = /etc/rc.d/init.d/httpd restart 
> > 
> > NAGUSERS        localhost=NOPASSWD: HTTP 
> > 
> > If I su to nagios, I can execute the restart. 
> > 
> > Nagios tries to execute it, but the message is:
> > Feb  2 13:22:38 slimp3server sudo(pam_unix)[15754]: authentication failure;
> > logname= uid=0 euid=0 tty= ruser= rhost=  user=nagios 
> > 
> > And the command is not executed. 
> > 
> > Any ideas? 
> > 
> >  
> > 
> >  
> > 
> >  
> > 
> > Chris Mason
> > masonc at masonc.com
> > Box 340, The Valley, Anguilla, British West Indies
> > Yahoo IM: netconcepts_anguilla at yahoo.com
> > 264 497-5670 Fax: 264 497-8463
> > www.netconcepts.ai 
> > 
> >  
> > 
> > -------------------------------------------------------
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> > ::: Messages without supporting info will risk being sent to /dev/null
>  
> 
> 
> -------------------------------------------------------
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