docker-library / docker-library/python

find_library broken in alpine image

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Description

According to http://bugs.alpinelinux.org/issues/5264 its known, that find_library is broken with python3 on Alpine.

However, with python2 it works on pure alpine:3.3,

$ docker run --rm -ti alpine:3.3 sh -c "apk add --no-cache file python && python -c 'from ctypes.util import find_library;print find_library(\"c\")'"
...
libc.musl-x86_64.so.1

but not on python:2-alpine,

$ docker run --rm -ti --entrypoint sh python:2-alpine -c "python -c 'from ctypes.util import find_library;print(find_library(\"c\"))'"
None

so python:2-alpine seems to break something in addition to the general alpine issue, which renders even version 2 broken. Maybe the find_library issue could also be worked around by python image in general.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the two commands from the issue in alpine:3.3 and python:2-alpine, then compare the image environments and Python ctypes.util.find_library behavior. Done means identifying the additional breakage in python:2-alpine and documenting or implementing a validated fix or workaround for the image.

Written by the indexing model from the issue text.

Assessment

Tech stack
docker, python
Domain
devops, infrastructure
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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