auto-upgrading models

[Eric Snow]

On Mon, Apr 25, 2016 at 6:38 PM, Andrew Wilkins
<andrew.wilkins at canonical.com> wrote:
> Whatever we do, #2 should never be optional.

Agreed.

>
> I would like us to have all of #2, #3, #4, #7.

This is my opinion too.  Menno suggested another option (call it #8):
a model config setting equivalent to the flag suggested by #7.  I
support that one too.

> For #3, we could say "upgrade
> each model ... or run `juju upgrade-juju --all-models
> <version-upgraded-to>`".

+1

>
> I don't think this should be restricted to "--upload-tools", but rather just
> upgrading the admin model in general.

Agreed.  I was focused on --upload-tools because that's where I had
actually seen a problem with the upgrade story.  This is partly
because you can only upload tools to the admin model now.  However, I
agree that this should not be limited to --upload-tools.

-eric