<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: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 14 (filtered medium)"><style></style></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1>Hi Mark<o:p></o:p><o:p> </o:p>Sorry for the lack of clarity. Learned a valuable lesson in “don’t email before coffee”… :)<o:p></o:p><o:p> </o:p>I was successful in altering the Host Check Command for the individual host – that was clear from the documentation.<o:p></o:p><o:p> </o:p>I am trying to remove this host from the “ping-servers” without altering the definition for the service or the hostgroup. So right now, the service and hostgroup’s are defined as:<o:p></o:p><o:p> </o:p>define service {<o:p></o:p> hostgroup_name ping-servers<o:p></o:p> service_description PING<o:p></o:p> check_command check_ping!50.0,20%!100.0,60%<o:p></o:p> use generic-service,graphed-service<o:p></o:p>}<o:p></o:p><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>And the new host, outsidefirewallhost, I would like to exclude from the ‘ping-servers’ service – but without modifying the definitions for the service or the hostrgroup.<o:p></o:p><o:p> </o:p>I have tried Brandon Phelps’ suggestion, but as he found out, Nagios doesn’t like the negation in the host configuration.<o:p></o:p><o:p> </o:p>I have been successful with this:<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 *,!outsidefirewallhost<o:p></o:p>}<o:p></o:p><o:p> </o:p>Should I just get over my personal hang-ups and implement it this way?<o:p></o:p><o:p> </o:p>Thanks again,<o:p></o:p><o:p> </o:p>Tim<o:p></o:p><o:p> </o:p><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: Frost, Mark {PBC} [mailto:mark.frost1@pepsico.com] Sent: Tuesday, November 08, 2011 8:37 AM To: Nagios Users List Subject: Re: [Nagios-users] Hostgroup tricks?<o:p></o:p></div></div><o:p> </o:p><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>