In the previous example, we saw that you can use Ruby to interpolate different values in templates depending on the result of an expression. But you're not limited to getting one value at a time. You can put lots of them in a Puppet array and then have the template generate some content for each element of the array using a loop.
Follow these steps to build an example of iterating over arrays:
- Modify your
site.pp
file as follows:
node 'cookbook' { $ipaddresses = ['192.168.0.1','158.43.128.1', '10.0.75.207' ] file { '/tmp/addresslist.txt': content => template('base/addresslist.erb') } }
- Create a
modules/base/templates/addresslist.erb
file with the following contents:
<% @ipaddresses.each do |ip| -%> IP address <%= ip %> is present <% end -%>
- Update the code on your Puppet master and run
puppet agent
on the cookbook:
[root@cookbook ~]# puppet agent -t ... Info: Caching catalog for cookbook.example.com Info: Applying...