Trusty cloud image has invalid Python installations

[tianon]

Trusty cloud image has invalid Python installations

[tianon]

@OddBloke any ideas how we're getting this oddity with the latest builds?

docker-library/official-images#1110 is more on the same problem 😕

[mikedoug]

Yes, I've done a bit more research.

So here's the problem. The Dockerfile is using the root file system provided by https://partner-images.canonical.com/core/trusty/. The 20150925 and 20151001 builds of the Ubuntu 14.04 (Trusty) cloud image have a fubared Python installation with a mix of Python 3.4.3 and Python 3.4.0. (You can see that in the manifest, look for the python lines: https://partner-images.canonical.com/core/trusty/20150925/ubuntu-trusty-core-cloudimg-arm64.manifest)

On 2015-10-07 (two days ago), the maintainers of the Ubuntu Docker image updated their root file system with the 20151001 build from Canonical. This broke the Python 3 installation such that you could no longer install the python dev packages because of mismatched versions.

Canonical has provided a new build today (20151009) where they have reverted to a pure Python 3.4.0 installation (no more mismatch!). Once they update the Docker image to use this cloud image root file system, then all will be well with the ubuntu:14.04 Docker image. Until then, hard code your docker base image to ubuntu:trusty-20150814 if you want a working Python 3 installation.

[mikedoug]

It'd also be nice if someone with some weight could contact Canonical and find out what the heck is going on. This isn't the first time Python 3.4.3 has leaked into the cloud images and has caused us no end of problems when it flopped back.

[tianon]

The upstream bug is https://bugs.launchpad.net/bugs/1505164 -- images are rebuilt, and PR is open at docker-library/official-images#1114.