Alpine Python build performance issues #509

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1. wglambert

   added

   questionUsability question, not directly related to an error with the imageUsability question, not directly related to an error with the image

   on Aug 19, 2020
2. wglambert commented on Aug 19, 2020

   

   wglambert

   on Aug 19, 2020

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   Standard PyPI wheels don’t work on Alpine
   Alpine Linux can cause unexpected runtime bugs

   Alpine uses a different libc: musl, compared to glibc. And the .whl format is not entirely compatible with musl. And some packages for pip are only offered in .whl format
   docker-library/docs#904
   pypa/manylinux#37
   pypa/pip#3969

   https://github.com/pypa/manylinux

   The manylinux1 tags allow projects to distribute wheels that are automatically installed (and work!) on the vast majority of desktop and server Linux distributions.

   In the docs it's mentioned that Alpine may behave differently from other Linux variants https://github.com/docker-library/docs/tree/master/python#pythonversion-alpine

   👍React with 👍1Reacted by Ülgen Sarıkavak
3. tianon commented on Aug 19, 2020

   

   tianon

   on Aug 19, 2020

   Member

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   The size difference is also improved by #508:

   $ docker pull python:3.8
   3.8: Pulling from library/python
   Digest: sha256:2c1045587e4452d49544c6dce92efe21c3b4b33864cfb56fdee66a2c8585c769
   Status: Image is up to date for python:3.8
   docker.io/library/python:3.8
   
   $ docker pull python:3.8-slim
   3.8-slim: Pulling from library/python
   Digest: sha256:a9e6f501d8330b2b00d87f3ff17cc0ef8c1c5031f8dfe428983d1c6fe7080338
   Status: Image is up to date for python:3.8-slim
   docker.io/library/python:3.8-slim
   
   $ docker pull python:3.8-alpine
   3.8-alpine: Pulling from library/python
   Digest: sha256:bd7f0719874c7de4ca47418de143ab4de79731dc0b01fdcf2425b8a32f4823ce
   Status: Image is up to date for python:3.8-alpine
   docker.io/library/python:3.8-alpine
   
   $ docker images python:3.8
   REPOSITORY  TAG  IMAGE ID      CREATED     SIZE
   python      3.8  79cc46abd78d  7 days ago  882MB
   
   $ docker images python:3.8-slim
   REPOSITORY  TAG       IMAGE ID      CREATED     SIZE
   python      3.8-slim  38cd21c9e1a8  7 days ago  113MB
   
   $ docker images python:3.8-alpine
   REPOSITORY  TAG         IMAGE ID      CREATED     SIZE
   python      3.8-alpine  44fceb565b2a  7 days ago  42.7MB

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4. tianon

   closed this as completedon Aug 19, 2020