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Managing a single template from multiple modules

asked 2013-10-10 21:54:28 -0500

STOIE gravatar image

Hi there,

I have some situations where I need to manage a single file and possibly even single value in that file. ie. limits.conf.

You have the one config: /etc/security/limits.conf And even one value, specific user, specific config item, specific value.

That needs to be modified (err controlled) by more than a single module.

Okay, lets say a user (foo), is running a tomcat server, which runs java apps. Now, in puppet, I am controlling both the tomcat server itself AND all the apps under it.

Now, initially that tomcat server only runs one application, so ... (more)

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answered 2013-10-10 23:31:22 -0500

Ancillas gravatar image

updated 2013-10-10 23:32:12 -0500

You could define the limits value of each app in a separate Hiera file, and then sum them with an inline template.

hiera file for app 1

---
limits:
 - 6

hiera file for app 2

---
limits:
 - 4

Puppet code

$limits_array = hiera_array('limits')
$limits_sum   = inline_template('<%= @limits_array.inject{|sum,x| sum + x} %>')

Otherwise, I suppose you could do something crafty with PuppetDB and a custom fact for storing a limits value, but that would be more complicated.

Honestly, you could just create a simple module for setting limits.conf, and then pass in a value that you config as you add apps to the server.

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Asked: 2013-10-10 21:54:28 -0500

Seen: 99 times

Last updated: Oct 10 '13