TL;DR - we're changing from docker-engine by default to archive's docker.io
package.

This in most cases will be a minor change and won't require any additional
action on your part. But I wanted to signal to the community at large for
any consumers or potential consumers of layer-docker that the default
installation path is changing.

https://github.com/juju-solutions/layer-docker/pull/78

I'm altering the default behavior of the installation which historically
pulled from the docker inc ppa and installed the latest "stable" release of
the docker-engine package.  The proposed change defaults to the 'docker.io'
package coming from the Ubuntu Archive.

The upstream delivery has been somewhat problematic in our
Kubernetes efforts, as kubernetes currently targets docker 1.11.x - the
baked in orchestration bits in 1.12 can in some rare cases cause issues
during deployment.

This change however, has some really positive upswing results - namely that
the docker.io package when applied against a LXD container with the
'docker' profile, will get you a mostly functional docker deployment inside
of LXD. It's not perfect, but with additional bugs, and effort from all us
as consumers, we can make this a winning story for users wanting to dev
locally on their laptop without eating cloud expenses.

If you're interested in this, I'm happy to send over instructions on how to
do this. Additionally, I'm happy to lead any coordination efforts of the
end user testing here, and will be happy to patch pilot any efforts to make
this a better story.

All the best,

Charles

-- 
Juju Charmer
Canonical Group Ltd.
Ubuntu - Linux for human beings | www.ubuntu.com
Juju - The fastest way to model your application | www.jujucharms.com
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