<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 12 (filtered medium)"> <style>  </style>  </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> <o:p> </o:p> <o:p> </o:p> <div> <div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'> From: Tim AtLee [mailto:T.AtLee@cfertech.com] Sent: Tuesday, November 08, 2011 9:46 AM To: nagios-users@lists.sourceforge.net Subject: [Nagios-users] Hostgroup tricks?<o:p></o:p> </div> </div> <o:p> </o:p> Hello<o:p></o:p> <o:p> </o:p> I have a hostgroup defined as:<o:p></o:p> define hostgroup {<o:p></o:p> hostgroup_name ping-servers<o:p></o:p> alias Pingable hosts<o:p></o:p> members *<o:p></o:p> }<o:p></o:p> <o:p> </o:p> I have recently added a host outside our firewall that has ping disabled. I have changed the host’s check_command to be ‘check_tcp!80’ so that the host won’t be offline permanently, but I am wondering if there is a way to exclude this host from the ‘ping-servers’ hostgroup in the host definition?<o:p></o:p> <o:p> </o:p> Ideally, something like:<o:p></o:p> define host {<o:p></o:p> host_name outsidefirewallhost<o:p></o:p> alias Host outside firewall<o:p></o:p> address some.ip.address<o:p></o:p> use generic-host<o:p></o:p> <o:p> </o:p> hostgroup !ping-servers<o:p></o:p> }<o:p></o:p> <o:p> </o:p> This generates an error when I test the configuration. The only way I have been able to achieve this is to change the ping-servers hostgroup definition to exclude this individual host (*,!outsidefirewallhost), but I’d rather keep the exclusion define in the host, not in the “blanket rule”.<o:p></o:p> <o:p> </o:p> Maybe it’s just me being OCD… but is this possible?<o:p></o:p> <o:p> </o:p> Thanks,<o:p></o:p> <o:p> </o:p> Tim<o:p></o:p> <o:p> </o:p> Tim,<o:p></o:p> <o:p> </o:p> I'm a little unclear about your question. Are you trying to alter the "Host Check Command" for a single host definition? That is, the method used by Nagios to determine if a host is up or not? If that's the case, you can just override the definition for that one host:<o:p></o:p> <o:p> </o:p> define host {<o:p></o:p> host_name outsidefirewallhost<o:p></o:p> alias Host outside firewall<o:p></o:p> address some.ip.address<o:p></o:p> check_command check-tcp-port-80<o:p></o:p> use generic-host<o:p></o:p> <o:p> </o:p> }<o:p></o:p> <o:p> </o:p> Check the docs for information on precedence, but your "generic-host" inclusion will specify a check_command (usually ping or better yet fping), but defining a different value in the definition itself can override that for the specific definition.<o:p></o:p> <o:p> </o:p> If that's not what you mean, and you want to change a specific service to check everything in that hostgroup except that one host, that would look something like<o:p></o:p> <o:p> </o:p> define service {<o:p></o:p> hostgroup_name ping-servers<o:p></o:p> host_name !outsidefirewallhost<o:p></o:p> service_description My Service<o:p></o:p> check_command run-a-ping<o:p></o:p> use generic-service<o:p></o:p> <o:p> </o:p> }<o:p></o:p> <o:p> </o:p> Hopefully I've understood your question…<o:p></o:p> <o:p> </o:p> Mark<o:p></o:p> </div> </body> </html>