launchpad-dev team mailing list archive

[Timothy Chavez <timothy.chavez@xxxxxxxxxxxxx>]

On 02/28/2012 09:12 AM, Julian Edwards wrote:
> On Monday 27 Feb 2012 18:53:25 Timothy Chavez wrote:
> > Hello,
> >
> > The CE Infrastructure team would like to use derived distributions to
> > create snapshots of each Ubuntu development milestone starting with
> > Precise Beta1 (if possible).  These snapshots would be used by our
> > engineering teams to build "stable" project images while the release,
> > itself, is still being developed.
> >
> > As I understand it, our team would be one of the users of derived
> > distributions (the feature is currently being used to derive Ubuntu from
> > Debian, no?)>  and that carries a bit of risk with it, but I think I'm
> > okay with that.  Even if we can't use it for Beta1, this seems to be a
> > good long term solution.
>
> It is derived indeed and there's not a great deal of risk.  We always intended
> derivations to be snapshot-capable.
>
> > If you think this is a legitimate and even plausible use of this
> > feature, let us know, we'd be happy to beta test :)  Thanks!
> >
> > -tim
>
> It sounds like a great usage to me.  Some questions:
>
>   * Are you snapshotting all of Ubuntu or just main?  This will affect
> librarian space which is tight at the moment until the new storage comes in.

We need all of Ubuntu.  There may be commercial projects that pull in 
packages from Universe, but even if there is not, there appears to be a 
Universe dependency on elilo for the debian installer, so without 
Universe, we have to exclude debian installer from these images.  That's 
less than ideal :)

Also, I don't think it helps, but this could be a "rolling snapshot". 
Once Beta2 comes out, the Beta1 snapshot could be refreshed.  No need to 
carry a separate Beta1 and a Beta2 snapshot.

We have a space constraint as well which is why I'm looking for an 
alternative solution to reprepro'ing all of Ubuntu onto 
cesg.canonical.com :)

>   * Are you wanting to rebuild?  It'd be a cool rebuild test as I've wanted to
> use DDs for that for a while, but you'd need to coordinate with Distro to
> avoid swamping the build farm with two at the same time.

I don't think a re-build would be necessary.  Just a copy of the archive 
at R-1 or R-2 of the Development Milestone.

>   * Do you need a published archive? (we currently publish derivations on a
> separate machine but nobody used this in anger yet)

Yep.  Project engineers need to point at this location in their 
live-buid configuration in place of archive.ubuntu.com/ubuntu/.

> J
>
>
>
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