Re: [atomic-devel] Reducing the footprint of the Fedora docker base image

[Colin Walters <walters verbum org>]

On Thu, Feb 11, 2016, at 05:08 AM, Daniel Riek wrote:

 

* Enable mounting containers as volumes (unless I am mistaken, right now we can only mount host directories as volumes? Might be wrong)

 

This is:

https://github.com/docker/docker/issues/7115

 

The thing that gets really messy is, sure you can mount another container

with dnf or whatever at /build/dnf, but everything that is used as part of a build

needs to be effectively statically linked.  Or alternatively, compute a union of files in /usr/bin.  But

then you have to look for *new files* that the build may have dropped in /usr/bin,

while still deleting files from the union from the build.

 

The rpm-ostree container approach to this is that builds always output rpms,

except it runs as non-root, (and we can make that *much* faster than a simple aggregation of yum install + docker)

but it also supports aggregating them into final images.