Docker offers two different channels in which you can preview unreleased code. This gives users a chance to review features that are both slated for release as well as features that are entirely experimental and may never make it into an actual release version. Reviewing these features and providing feedback on them is an important piece of open source software development. Docker takes the feedback it receives seriously and lots of great ideas that have been tested in these channels make it into the production code release. In this recipe, we'll review how to install both the test and the experimental Docker releases.
In this recipe, we'll be using a freshly installed Ubuntu 16.04 host. Although not a requirement, it is recommended that you install prerelease versions of Docker on a host that does not currently have Docker installed. If the installer script detects Docker is already installed, it will warn you not to install the experimental...