title: OpenStack: launch instance with raw disk format
body: <p>I have some headache with my OpenStack. What i'm trying to do is to create instance which disk is in RAW format instead of default qcow.</p>
  
  <p>My disk image from which I'm trying to create the instance is in raw format too. I've created the image via:</p>
  
  <pre><code>openstack image create --public --disk-format raw --container-format bare --file CentOS-7-x86_64-GenericCloud-1710.raw CentOS_7_raw
  </code></pre>
  
  <p>But when I launch instance from it I see that the disk is converted to Qcow2(v3) format.</p>
  
  <p>Is there any possibility to run an instance with raw format disk?</p>