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How can I collect values from Hiera in a hash.

asked 2015-07-28 07:42:25 -0500

Krist van Besien gravatar image

I have wrapper class that I want to use to set up a nginx server, as well as set up firewall ports and selinux ruls.

So I have for example this in my hiera data:

my_nginx::vhosts:
  localhost_8081:
    listen_port:    8081
    www_root:       /usr/share/nginx/html
  localhost_8082:
    listen_port:    8082
    www_root:       /usr/share/nginx/html

I use this in createsources, with the defined type that comes with the nginx module I use, and this works as expected.

However I also need to create firewall rules. So I add something like this:

 iptables::rule { $ports: }

This is done using a custom defined type. In order to tell it which ports need to be opened I have this in hiera:

my_nginx::ports:
  - 8081
  - 8082

As you can see this means that whenever I add a virtual host to hiera I need to specify the port twice. Is there a way around this? Is there a way to just collect all the "listen_port" values in an array, that I can use to create the iptables::port resources?

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answered 2015-07-28 08:50:29 -0500

updated 2016-07-29 04:47:36 -0500

Hi,

I'm looking to do something similar soon.

I think in Puppet 4 it is possible to use iteration...

something like !untested!:

$vhosts = hiera_hash('my_nginx::vhosts')

$vhosts.each |$key| { 
  # you should then be able to access listen_port within each key ---
  listen_port = $key[listen_port]
  # create your iptables::rule resource here
  iptables::rule { $listen_port: }
}

the following link may give you some more info: https://docs.puppetlabs.com/reference...

As for Puppet <4 I think the only way would be to create your own defined type, which creates an iptables::rule resource and an nginx::vhost resource, then use a similar create_resources call but to your defined type.

HTH, Josh

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answered 2016-07-29 08:08:15 -0500

DarylW gravatar image

Two possible answers for puppet 3, if that's where you're doing it.

1) Pass your mynginx::vhost structure into a custom function, and do the manipulations you need in ruby to turn it into the array/hash of values you need, and then pass that to a createresources call.

2) If you only need that single array, there may be some way to collect out just the values of that key, sort and unique them.

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Asked: 2015-07-28 07:42:25 -0500

Seen: 377 times

Last updated: Jul 29 '16