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    <p>It doesn't seem that you can access a defined type's attributes. <a href="http://docs.puppetlabs.com/guides/scope_and_puppet.html" rel="nofollow">Possible explanation here</a>. What you can do however, is externalize it via hiera.</p> <p>Hiera is a great way to separate your manifest logic from the data populating it, but it is not difficult to set up.</p> <p><a href="http://docs.puppetlabs.com/hiera/1/installing.html" rel="nofollow">Installing</a></p> <p>In my first try I was trying to access hiera variables by class reference; <code>foo::a</code> for example, but that doesn't work for defined types.</p> <p>Using <a href="http://drewblessing.com/blog/-/blogs/puppet-hiera-implement-defined-resource-types-in-hiera" rel="nofollow">http://drewblessing.com/blog/-/blogs/puppet-hiera-implement-defined-resource-types-in-hiera</a> as a guide, you can put declare all those attributes in hiera with a simple config:</p> <p><a href="http://docs.puppetlabs.com/hiera/1/configuring.html" rel="nofollow">Configuring</a>: </p> <p>hiera.yaml</p> <pre><code>:backends: - yaml :yaml: :datadir: $hiera_dir :hierarchy: - common </code></pre> <p>$hiera_dir/common.yaml</p> <pre><code>foo: a: x: 'oh bar may you reference me' y: 'please' </code></pre> <p>And then in your puppet manifest:</p> <pre><code>define foo ($x, $y) { } define bar($foo) { require create_my_foos $all_foos = hiera('foo') # This is just for proof of concept, to show that the variable can be passed. file { '/tmp/output.txt': content =&gt; $all_foos[$foo]['x'] } } class create_my_foos { $foo_instances = hiera('foo', []) create_resources('foo', $foo_instances) } bar { 'b': foo =&gt; 'a' } </code></pre> <p>Now you can access foo's variables by calling the <code>hiera('foo')</code> function to get an array of <code>foo</code>'s attributes, and do array lookups to get the exact parameter you need.</p> <p>Note that hiera <a href="http://docs.puppetlabs.com/hiera/1/puppet.html#interacting-with-structured-data-from-hiera" rel="nofollow">only looks up <strong>top-level keys</strong></a>, so you can't do <code>hiera('foo'['a']['x])</code>.</p>
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    1. POIn Puppet, how can I access a variable/attribute inside a defined type?
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    1. COCertainly not the answer I was hoping for, but thanks! I've tried your workaround and it does work. I will accept your answer with bounty unless somebody else can come up with a way of accessing foo.x without the requirement that foo.x is accessible through hiera within the next couple of days.
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      1. USLodewijk Bogaards
    2. COI am also curious as to why this is not possible using the Puppet language alone.
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      1. USLodewijk Bogaards
    3. COI am also quite interested in why, so I did a bit more digging around and found something of interest - http://docs.puppetlabs.com/guides/scope_and_puppet.html I have updated my answer to include it.
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