Open Stack

Hi alex,

I think u are referring to the following: https://blueprints.launchpad.net/nova/+spec/glance-snapshot-tasks

Can u describe the #2 part in more detail. Do some of the drivers already implement these new steps?

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).

-Josh

From: Alexander Gorodnev <gorodnev at gmail.com<mailto:gorodnev at gmail.com>>
Reply-To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Date: Thursday, February 6, 2014 at 1:57 AM
To: "openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Subject: [openstack-dev] [nova] bp: glance-snapshot-tasks

Hi,

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.
These steps I did when tried to implement this BP:

1) Moved snapshot functionality from Compute to Conductor (as I understood it's the best place for such things, need clarification);
Even this step should be done in two steps:
a) Add snapshot_instance() method to Conductor that just calls the same method from Compute;
b) After that move all error-handling / state transition / etc  logic from Compute to Conductor. Compute exposes API for drivers (see step 2);

2) The hardest part is a common, convenient, complete API for drivers. Most drivers do  almost the same things in the snapshot method:
a) Goes to Glance and registers new image there;
b) Makes snapshot;
c) Downloads the image to the Glance;
d) Clean temporary files;

I would really appreciate any thoughts and questions.

Thanks,
Alexander
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20140206/c9f47cff/attachment.html>