I'm using stdlib to help with this $listeners = hiera('haproxy_listeners',
undef)$listener_keys = keys($listeners) then pass $listener_keys to a define to
create all the instances
The entre hash is in memory ($listeners) and the define will have the key it is
working on ($name)So you can access anything in the data structure to build
your resources.
Steven
Date: Fri, 4 Jan 2013 09:05:15 -0800
From: andytaylo...@gmail.com
To: puppet-users@googlegroups.com
Subject: [Puppet Users] Re: Hiera hashes and arrays in ERB templates
Thanks for your suggestions guys. I did consider using create_resource, but
don't see how I can when I'm trying to apply this Hiera data to a single file.
To expand on my initial post, what I need to do is create multiple config
blocks within one file resource. So this Hiera data:
haproxy_listeners : "cluster1" : ip : '192.168.0.2' port : '80' servers :
"server1" : ip : '192.168.0.3' port : '8080' "server2" : ip :
'192.168.0.4' port : '8080' "cluster2" : ip : '192.168.0.5' port : '80'
servers : "server3" ip : '192.168.0.6' port : '8080' "server4"
ip : '192.168.0.7' port : '8080'
will result in this being generated in the haproxy config file:
listen cluster1 192.168.0.2:80 server server1 192.168.0.3:8080
server server2 192.168.0.4:8080
listen cluster2 192.168.0.5:80 server server3 192.168.0.6:8080
server server4 192.168.0.7:8080
So I don't see how create_resources can handle this, as that's for creating
multiple Puppet resources, as opposed to multiple blocks within a single file.
The only alternative I can think of at the moment is using create_resources
with a define which utilizes Augeas, but I don't know how well that will work.
Thanks,
Andy
On Friday, 4 January 2013 16:47:13 UTC, Gavin Williams wrote:I'm with Andy on
this one... I'm doing something very similar with my NetApp volume provider
(https://github.com/fatmcgav/fatmcgav-netapp/).
I've created a define with the following contents:
define util::netapp::volume (
$ensure = present,
$size,
$aggr = 'aggr1',
$snapresv = 0,
$autoincrement = true,
$snapschedule = {"minutes" => 0, "hours" => 0, "days" => 0, "weeks" =>
0}
) {
netapp_notify {"volume_define_${name}":
message => "Processing Volume ${name}",
}
->
netapp_volume { "v_${name}":
ensure => $ensure,
initsize => $size,
aggregate => $aggr,
spaceres => "none",
snapreserve => $snapresv,
autoincrement => $autoincrement,
options => {'convert_ucode' => 'on', 'no_atime_update' => 'on',
'try_first' => 'volume_grow'},
snapschedule => $snapschedule
}
->
netapp_qtree { "q_${name}":
ensure => $ensure,
volume => "v_${name}"
}
->
netapp_export { "/vol/v_${name}/q_${name}":
ensure => $ensure,
persistent => true
}
}
I've added a default hash to 'snapschedule' in the options list, but that can
be over-ridden from the Hiera data.
Then use the following to pull the data from hiera and call the define:
create_resources( util::netapp::volume, hiera('volumes') )
'Volumes' in hiera yaml looks like:
volumes:
vol1:
ensure: present
size: '500m'
vol2:
ensure: present
size: '20g'
snapschedule:
minutes: 0
hours: 36
days: 0
weeks: 0
You can also use the 'hiera' command to test your yaml structure:
$ hiera -c hiera.yaml volumes clientcert=act-star-nactl01
{"vol1"=>{"ensure"=>"present", "size"=>"500m"}, "vol2"=>{"ensure"=>"present",
"size"=>"20g", "snapschedule"=>{"days"=>0, "weeks"=>0, "hours"=>36,
"minutes"=>0}}}
As you can see from the above output, snapschedule for vol2 is a nested hash.
This assumes that your resource provider can support hashes on the relevant
param/property ;)
HTH
Gav
On Friday, 4 January 2013 15:37:25 UTC, llowder wrote:
On Friday, January 4, 2013 9:11:28 AM UTC-6, Andy Taylor wrote:Hi,
I'm trying to build a module for haproxy which fetches all the configuration
data from Hiera to populate the haproxy config file. I've run into a number of
issues though when I try to use hashes. Ideally, I want to use something like
this:
haproxy_listeners : "cluster1" : ip : '192.168.0.2' port : '80' servers :
"server1" : ip : '192.168.0.3' port : '8080'
So a hash of clusters with each cluster containing a nested hash of servers. Is
this possible with Hiera/ERB? It's easy enough to iterate over the first hash,
but I can't work out how to extract the contents of the nested hash. Or I might
just be approaching this in entirely the wrong way... Any help would be much
appreciated.
I haven't used the function myself, but this looks like it would be a good case
for a define + create_resources(), which I think is part of stdlib. You might
need to restructure the hashes slightly, but I think that will be the best
approach.
Thanks,
Andy
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