Python Installation Failure on ARM Architecture

[leiicamundi]

Problem

Encountered a Python installation failure when using AWS ARM runners for self-hosted workflows.

Description

While configuring self-hosted runners, I opted to use AWS ARM runners scheduled on arm64 nodes.

However, during the setup process, I encountered a Python installation failure with the following error:

The version '3.12' with architecture 'arm64' was not found for Ubuntu 20.04.

Solution

The recommended solution is to use deadsnakes for ARM, as demonstrated in the following workflow snippet:

- name: Install Python3 (ubuntu-arm install)
  uses: deadsnakes/[email protected]
  # actions/setup-python doesn't yet support ARM, see https://github.com/actions/setup-python/issues/108#issuecomment-1756948951
  if: ${{ matrix.os == 'ubuntu-arm' }}

Note: This solution is currently the only available option until official ARM support for Linux is provided by actions/setup-python. Refer to Issue #108 for ongoing discussions on ARM support.

Impact

This Python installation issue is particularly noticeable when using AWS ARM runners for self-hosted workflows, we also need to test it on arm runners.