...3 weeks later:
On Tue, Jun 21, 2016, at 04:59 PM, Colin Walters wrote:
>
> It does seem viable to create a `centosmin` image that in some cases
> uses different package builds (e.g. ensuring rpm doesn't
> pullrelatively close in being min-coreutils + bash + yum. Some
> postprocessing on the depchain such as deleting `.py{,c}` files etc.
> would help.
I realized recently that the work we'd been doing in libhif[1] which is
a C library for package management
would allow us to have a minimal "yum -y install" reimplementation[2]
using libhif, which would be
good for such a minimal image as then we could drop Python for example.
I spent some of last Friday's plane flight back from the Summit
working on it:
https://github.com/cgwalters/centos-dockerbase-minimal
You can try it with:
docker pull docker.io/cgwalters/centosmin
I've only done some basic smoketesting on it. Compressed it's 28MB,
uncompressed 77MB right now.
I estimate it wouldn't be too hard to get within 60MB, but past that
things get a bit trickier as we
need to investigate single-binary coreutils, a minimal libcurl build,
and in general trimming
out a lot of the duplication in our C libraries like only having openssl
and not nss, trimming down
glib2 etc.
I'm curious what people think. The tradeoff is we now have two base
images (per distribution).
[1] https://github.com/rpm-software-management/libhif
[2] https://gitlab.com/cgwalters/micro-yuminst
