Hacker News new | ask | show | jobs
by newman314 1732 days ago
I think I ran into this problem while trying to Dockerize ansible to be able to run on ppc64le.

For other reasons, I have a need to be able to run an up to ansible on Linux on POWER. I think due to a lack of an available wheel for cryptography on ppc64le, I ended up having to include cargo in the dependency chain and subsequently a pretty large docker image (over 200MB). Ugh.
2 comments
reaperhulk 1732 days ago
You can avoid this by building cryptography as a docker stage and then just extract the wheel as part of your docker build process. Alternately if you install rust, build cryptography, and uninstall rust all in one layer then you can also avoid this issue.
link
newman314 1732 days ago
That's what I currently do already but I did notice that I failed to uninstall gcc when looking at the Dockerfile again today so I'm now down to 150MB (after rebuilding). Still not great but better.

Currently my build uses Ubuntu, I'm going to try switching over to Alpine when I get a chance to see how much savings I can claw back.

link
gpm 1732 days ago
I believe you should be able to avoid docker image size bloat by combining `install rust; do things that need rust; uninstall rust` into one run directive (same with anything that needs any compiler). It's not a runtime dependency.
link