[LiliDeng]

Summary

Update the Linux runtime container to mcr.microsoft.com/azurelinux-beta/base/core:4.0.

• Install Python from the Azure Linux 4.0 distribution repositories.
• Replace unavailable build-essential with explicit gcc-c++, make, and glibc-devel packages, retaining gcc.
• Remove unavailable python3-virtualenv; Python's built-in venv module supplies virtual environment creation.
• Install gzip explicitly because the core image does not include it and AzCopy extraction requires it.
• Document the base image and Python/venv behavior.

The requested base is a beta image. The existing latest-LISA-release checkout and [ado,azure,libvirt,baremetal] installation behavior are unchanged.

Validation

Performed a complete Docker build on Linux amd64 using the changed Dockerfile, then checked the resulting container:

Check	Result
Complete image build, including optional dependency installation	Passed; installed mslisa 20261019.1
Python runtime	Python 3.14.3
python3 -m pip check	No broken requirements found
lisa --help	Passed
az version	Azure CLI 2.92.0
azcopy --version	AzCopy 10.34.1
python3 -m venv and venv pip	Passed
git diff --check	Passed

LISA CLI emitted notices for the intentionally uninstalled AWS/AI extras. No Azure VM deployments or end-to-end LISA test suites were executed; these checks validate image buildability and CLI startup, not full Python 3.14 or cloud-platform certification.

[Copilot]

🔵 Needs a closer look

The beta OS/Python 3.14 image is published as latest, but build and CLI checks leave end-to-end Azure provisioning, SSH/reboot, and libvirt compatibility unverified.

No open issues 🎉

What changed in this PR

Updates LISA’s Linux runtime container to the Azure Linux 4.0 beta core image while preserving the existing release checkout and optional dependency installation.

Changes:

• Installs distribution-provided Python and explicit compiler/build packages.
• Removes python3-virtualenv in favor of built-in venv and adds gzip for AzCopy extraction.
• Documents the new base image and Python behavior.

The PR reports successful image-build and CLI checks; end-to-end validation remains outstanding. Suggested validation:

Key Test Cases:
smoke_test

Impacted LISA Features:
None directly; changes affect container packaging.

Tested Azure Marketplace Images:

• canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest

File	Description
installers/​Dockerfile.linux	Switches to Azure Linux 4.0 beta and adjusts runtime/build packages.
docs/​docker_linux.rst	Documents the base image, distribution Python, and built-in venv.

_{Review effort: Balanced}

[LiliDeng]

AI Test Case Selection

Selected 1 test case(s): smoke_test

Marketplace image: canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest

Result: Succeeded

View full logs in Azure DevOps