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<div>Hi alex, </div>
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<div>I think u are referring to the following: <a href="https://blueprints.launchpad.net/nova/+spec/glance-snapshot-tasks">https://blueprints.launchpad.net/nova/+spec/glance-snapshot-tasks</a></div>
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<div>Can u describe the #2 part in more detail. Do some of the drivers already implement these new steps?</div>
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<div>The goal I think u are having is to make the snapshot functionality resume better and cleanup better right? In the end this will even allow for resuming if nova-compute (the process that does the snapshot) crashes/is restarted… Just wanted to make sure
people understand the larger goal here (without having to read the whole blueprint, which might be wordy, haha).</div>
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<div>-Josh</div>
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<span style="font-weight:bold">From: </span>Alexander Gorodnev <<a href="mailto:gorodnev@gmail.com">gorodnev@gmail.com</a>><br>
<span style="font-weight:bold">Reply-To: </span>"OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br>
<span style="font-weight:bold">Date: </span>Thursday, February 6, 2014 at 1:57 AM<br>
<span style="font-weight:bold">To: </span>"<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br>
<span style="font-weight:bold">Subject: </span>[openstack-dev] [nova] bp: glance-snapshot-tasks<br>
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<div dir="ltr">Hi,
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<div>A blue print was created and Joshua even wrote quite huge text. Right now this BP in Drafting stage, so I want to bring this BP to life and continue working on the topic. I even tried to make some changes without approvement (only just as experiment) and
got negative feedbacks. </div>
<div>These steps I did when tried to implement this BP:</div>
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<div>1) Moved snapshot functionality from Compute to Conductor (as I understood it's the best place for such things, need clarification);</div>
<div>Even this step should be done in two steps:</div>
<div>a) Add snapshot_instance() method to Conductor that just calls the same method from Compute;</div>
<div>b) After that move all error-handling / state transition / etc logic from Compute to Conductor. Compute exposes API for drivers (see step 2);</div>
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<div>2) The hardest part is a common, convenient, complete API for drivers. Most drivers do almost the same things in the snapshot method: </div>
<div>a) Goes to Glance and registers new image there;</div>
<div>b) Makes snapshot; </div>
<div>c) Downloads the image to the Glance;</div>
<div>d) Clean temporary files;</div>
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<div>I would really appreciate any thoughts and questions.</div>
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<div>Thanks,</div>
<div>Alexander</div>
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