title: How to comment Ansible variables
body: <p>I want to setup 2 Kafka cluster on the same host. I have defined variables under <code>host_vars/HOSTNAME</code> file which looks like as following:</p>
  <pre class="lang-yaml prettyprint-override"><code>Kafka_cluster_path: /home/cluster1
  # Kafka_cluster_path: /home/cluster2
  </code></pre>
  <p>I have a template which uses <code>cluster_id</code> as following:</p>
  <pre class="lang-yaml prettyprint-override"><code>{{ Kafka_cluster_path }}/kafka/start.sh
  </code></pre>
  <p>When I run my Ansible role, it fills template with <strong><code>Kafka_cluster_path =/home/cluster2</code></strong>.</p>
  <p><strong>Is there a way to really comment a variable in Ansible?</strong></p>
  <p>BTW, when I remove commented line:</p>
  <pre class="lang-yaml prettyprint-override"><code>Kafka_cluster_path: /home/cluster1
  </code></pre>
  <p>and run the Ansible role then <code>kafka_cluster_path</code> gets the correct value (<code>/home/cluster1</code>).</p>