New image organization and snap format

[Gustavo Niemeyer]

Thanks Michael!

As a minor and bikeshed-prone comment, feels like we could improve the
gadget/kernel names a bit. I know the convention put in place there is what
we agreed at the sprint, but looking at them with fresh eyes makes it feel
like we should tweak them.

Specifically, the names "canonical-pc" and "canonical-linux-pc" makes it
feel like we have a PC, and a Linux PC, which isn't the intended meaning we
want to convey.

I suggest inverting these names as "canonical-pc" and "canonical-pc-linux",
so we have a PC, and its Linux.

Similarly, we'd have "canonical-pi2" and "canonical-pi2-linux" (note the
single term rather than "raspi2" vs. "pi2").

How does that sound?






On Thu, Dec 17, 2015 at 7:41 PM, Michael Vogt <michael.vogt at canonical.com>
wrote:

> On Tue, Nov 24, 2015 at 02:30:04PM +0100, Michael Vogt wrote:
> > On Wed, Nov 11, 2015 at 04:26:13PM -0200, Gustavo Niemeyer wrote:
> > > This is (perhaps) the last major change which I'd like to raise
> attention
> > > to, and it's perhaps one of the most disruptive and exciting ones too.
> > >
> > > In the coming weeks we'll be landing relevant changes related to how
> the
> > > ubuntu core image itself is organized, and also to the packaged format
> of
> > > snaps. The new format is not backwards compatible, but there are
> relevant
> > > benefits that will become apparent as that work lands and unrolls.
> Michael
> > > Vogt is leading these changes for quite some time now, and we're
> expecting
> > > them to become visible in the following weeks.
> >
> > We made some good progress here in the last few weeks and there is an
> > experimental "all-snap" image available at:
> [..]
>
> The all-snap image [1] has reached a new milestone, I pushed a new amd64
> image to:
>
>   https://people.canonical.com/~mvo/all-snaps/
>
> that boot directly from the squashfs kernel-snap using the grub loop
> mount support (no need to extract the kernel anymore). It also uses a
> squashfs based gadget snap and follows the snap package names
> discussed during the most recent snappy sprint.
>
> Here is what it looks like on amd64:
>
> """
> ubuntu at localhost:~$ snappy list
> Name               Date       Version   Developer
> canonical-linux-pc 2015-12-14 4.3.0-2-1 canonical
> ubuntu-core        2015-12-17 16.04.0-2 canonical
> canonical-pc       2015-12-17 2.1       canonical
> """
>
> Note that when looking at /boot/grub there is no unpacked
> kernel/initramfs anymore:
>
> """
> ubuntu at localhost:~$ ls /boot/grub/
> fonts  grub.cfg  grubenv  i386-pc  install.yaml  locale  x86_64-efi
> """
>
> I also pushed a new rpi2 all-snap image which looks like this:
> """
> ubuntu at localhost:~$ snappy list
> Name                   Date       Version      Developer
> canonical-linux-raspi2 2015-12-17 4.2.0-1014-2 canonical
> ubuntu-core-armhf      2015-12-17 16.04.0-2    canonical
> canonical-pi2          2015-12-17 2.2          canonical
> """
> There we do have to unpack the kernel/initrd as uboot does not support
> squashfs4.
>
> Updates from the store should work on both images (as long as we keep
> the snap package names :) But be warned that this is all pretty new
> stuff.
>
> Enjoy the new images!
>
> Cheers,
>  Michael
>
>
> [1] Created with lp:~snappy-dev/goget-ubuntu-touch/all-snaps
>
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-- 
gustavo @ http://niemeyer.net
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