Extend ubuntu-ci to download the golden image from glance

[Evan]

8:18 PM <ev> okay, so let's extend ubuntu-ci to download an image
8:18 PM <ev> sound sensible?
8:18 PM <ev> it has the creds to hand
8:18 PM <doanac> ev: nice idea.

[Evan (ev)]

Please use python-glanceclient for this (with a dep added under debian/control).

[Andy Doan (doanac)]

I just poked around on this some and glance seems to be fighting me a bit. I get 403 errors when i try to download anything. Any ideas?

[Andy Doan (doanac)]

i'm starting to think that even if we get config stuff figured out for glance, its still going to be a pain or error prone making this "just work". I'm wondering if we should just push the image into swift during the image-builder step with a name like:

 ticket-<id>/img.qcow2

then we have a nice convention for finding images (not looking up glance image ids). And the CLI can do a simple swift download (its uses the same auth information)

[Vincent Ladeuil (vila)]

According to the discussion on IRC yesterday, this is an issue on hpcloud but not on canonistack so I'd rather invest time fixing the missing bits (some config in glance) and use glance properly than working around and adding more cruft to swift.

But whatever works in the short term...

[Evan (ev)]

> I'm wondering if we should just push the image into swift during the
> image-builder step with a name like:
>
> ticket-<id>/img.qcow2

Yes please. I'm coming around to the idea that this is an artifact of the process that should be separately managed from the images available to boot from. We don't know the risks associated with keeping a growing set of images available in glance forever just so people can download them. Also as mentioned in email, HP Cloud doesn't allow downloading of images from glance.

This should presumably make things a bit easier for the CLI, as it already needs to know how to talk to Swift. It makes fixing bug 1288710 (kill ~/.ubuntu-ci by talking to an intermediary that has the Swift creds) straightforward because we don't need to create proxies for both swift and glance.

I think the CLI should still have a method for "give me the image that's the current release candidate", where this is defined as the image for the most recent successfully completed ticket.