On Thu, Jun 16, 2016 at 2:57 AM, Donald Stufft <donald@stufft.io> wrote:
Of course It still applies to Docker. You still have an operating system inside that container and unless you install zero Python using packages from the system then all of that can still conflict with your own application’s dependencies.

​You're correct, theoretically. But in reality is best to not stick a dozen services or apps in a single docker image. What's the point of using docker if you're having a single container with everything in it? Eg: something smells if you need to run a supervisor inside the container.

If we're talking about python packages managed by the os package manager ... there are very few situations where it makes sense to use them (eg: pysvn is especially hard to build), but other than that? Plus it's easier to cache some wheels than to cache some apt packages when building images, way easier.

-- Ionel
Cristian Mărieș, http://blog.ionelmc.ro