Codespaces Demo (RHEL)

Demo of configuring GitHub Codespaces for Red Hat Enterprise Linux (RHEL) UBI and companion base images.

Overview

This repo ships a Codespaces-ready devcontainer plus CI workflows that build and publish container images for RHEL UBI, Rocky Linux, and Fedora variants. Use it as a template for RHEL-flavored development environments or as a reference for shipping pre-built devcontainer images to GHCR.

Quickstart (Codespaces)

1. Create a Codespace on the main branch.
2. The devcontainer defined in .devcontainer/devcontainer.json will boot automatically using a rockylinux:9 base image.
3. Post-create tasks in .devcontainer/post-create.sh make Zsh the default shell, install Powerlevel10k, and add git aliases from .devcontainer/aliases.sh.
4. Start coding—common VS Code extensions (C/C++, Docker, Makefile tools, Copilot Chat, Remote Containers) are preinstalled.

Devcontainer details

• Base image: rockylinux:9 (override by building your own image with the Dockerfiles below).
• Features: common-utils with Zsh, vscode user, package upgrades.
• Extensions: listed in .devcontainer/devcontainer.json.
• Shell setup: Powerlevel10k theme and git aliases via .devcontainer/post-create.sh and .devcontainer/aliases.sh.

Building images locally

• RHEL UBI image: built from .devcontainer/Dockerfile; pick a major version via RHEL_VERSION (8/9/10).

docker build -f .devcontainer/Dockerfile --build-arg RHEL_VERSION=9 -t ghcr.io/<owner>/devcontainer-rhelyeah:rhel-9 .devcontainer

• Rocky Linux variants live under .devcontainer/RockyLinux and Fedora under .devcontainer/Fedora.

CI workflows (GHCR publishing)

• RHEL UBI: .github/workflows/build-ubi.yml builds tags rhel-8, rhel-9, rhel-10, scans with Trivy, and uploads SARIF results daily at 00:00 UTC.
• Rocky Linux: .github/workflows/build-rocky.yml builds Rocky 8/9/10 images with appropriate repositories enabled (powertools for 8, crb for 9/10) and runs Trivy.
• Fedora: .github/workflows/build-fedora.yml builds the latest Fedora image and scans with Trivy.

Artifacts are pushed to ghcr.io/<owner>/devcontainer-rhelyeah:*.

Pre-commit

Run pre-commit locally or inside the container to keep formatting and lint checks aligned:

pre-commit run -a

Notes

• [2024-08-03]: Removed support for RHEL7 images as VS Code is unsupported on it.

License

This project is licensed under the terms of the LICENSE file.