juju/juju — pull request #55 by axw (2014-06-10 11:20:31+00:00)
Title: Implement automatic availability zone spread

There are two components to this PR:
- new functionality in `provider/common` to enable automatic spread of instances across AZs;
- updates to `provider/ec2` to make use of this common code.

The openstack provider will be updated in a followup.