Supported Docker versions

Docker technologies have a fast iteration pace. This is a good thing, but it comes with some challenges. As requested by some of our users, the following table shows which versions of Docker and Docker Distribution are supported by each Portus version:

Portus	Docker Engine	Docker Distribution
master	1.6+	2.0+
2.0.0 & 2.0.1	1.6 to 1.9	2.0 to 2.2
2.0.2	1.6 to 1.9	2.0+
2.0.3 (soon to be released)	1.6+	2.0+

Let's detail some of the version being specified:

• Docker Engine 1.6 is the first version supported by Docker Distribution 2. Therefore, this requirement is also the same for Portus.
• As of Docker 1.10, the Manifest Version 2, Schema 2 is the one being used. This is only supported by Portus in the master branch and in 2.0.3.
• Docker Distribution 2.3 supports both Manifest versions, but some changes had to be made in order to offer backwards compatibility. This is not supported neither for Portus 2.0.0 nor 2.0.1.