I'm trying to generate (and manage) nagios configuration based on what classes
have been included by nodes. I've seen the example at
http://docs.puppetlabs.com/guides/exported_resources.html, and I'm doing that
now. However, it has some problems:
- puppet runs are very slow on the nagios node
- when I want to change the service configuration in nagios, I have to wait for
all my puppet agents to check in so they can export a new nagios_service, then
wait for the nagios node to check in to pick up the exported service
- the nagios configuration is hard to read with human eyes because the same
service definition is repeated many times, once per node
I'd much rather configure nagios like most people would do it if they weren't
generating their configs. Rather than having 100 service definitions for 100
webservers, they have 1 service definition that applies to 100 hosts, or to 1
hostgroup that has 100 nodes in it.
Here's the problem: I can't think of anything to put in the apache class that
will result in a host being in the "apache" nagios hostgroup (which ultimately
is set by a comma delimited string). That's because:
- an element in a comma delimited string is a fragment of a resource (a file),
so I can't export it
or alternately:
- there's no way to introspect the classes that are included in a manifest and
generate the corresponding comma delimited string, then export it
Essentially, I want this:
include apache
include exim
To result in this:
file { "/config_file":
content => "apache,exim\n"
}
Any ideas on how I might accomplish that?
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