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<p class="MsoNormal">Hello experts<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Currently using openstack Xena and Ceph backend (Pacific 16.2.7)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It seems there is a bug (since Wallaby?) where the efficient use of a CEPH Pacific RBD backend (i.e with copy-on-write-cloning) is not working .<o:p></o:p></p>
<p class="MsoNormal">Show_image_direct_url needs to be False to create volumes (or ephemeral volumes for nova)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This can of course be tremendously slow (Nova , ephemeral root disk) without copy-on-write cloning feature of Ceph.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">As Ceph RBD is THE most favourite backend for block storage in openstack I am wondering how others are coping (or workarounds found ?)<o:p></o:p></p>
<p class="MsoNormal">Which combinations of Openstack and Ceph are known to work well with copy-on-write-cloning?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">How is the noted <i>GRAVE Security RISK of enabling </i>Show_image_direct_url mitigated ? (i.e I think , for CEPH RBD, it needs to be True to get cloning to work efficiently)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">See another report of this issue here:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://www.spinics.net/lists/ceph-users/msg66016.html">Re: Ceph Pacifif and Openstack Wallaby - ERROR cinder.scheduler.flows.create_volume — CEPH Filesystem Users (spinics.net)</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for any help or pointers,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Andrew West<o:p></o:p></p>
<p class="MsoNormal">Openstack consulting<o:p></o:p></p>
<p class="MsoNormal">CGG France<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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