Specifying a group variable on the ansible command line
<p>Ansible allows the creation of variables that pertain only to a group in the inventory file as follows:</p>

<pre><code>[DC1:vars]
node_availability=available

[DC2:vars]
node_availability=unavailable
</code></pre>

<p>I would like to do this on the command line instead, using the <code>--extra-vars</code> parameter.  Any idea how this may be accomplished?  I've tried various permutations of <code>group.DC1.node_availability=available</code> and the like to no avail.</p>