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DevOps-OS Use Case Examples

This document provides practical examples and advanced use cases for each major functionality in the DevOps-OS repository.

1. Multi-Language Development Container

Use Cases

  • Polyglot Microservices: Develop and test services in Python, Java, Go, and JavaScript/TypeScript within a single, consistent environment.
  • Onboarding: New team members can start coding immediately with all tools pre-installed.
  • Version Pinning: Ensure all developers use the same versions of compilers, linters, and CI/CD tools.

Example: Adding a New Language

Edit .devcontainer/devcontainer.env.json to enable Ruby support:

{
  "languages": {
    "python": true,
    "java": true,
    "javascript": true,
    "go": true,
    "ruby": true
  }
}

2. CI/CD Generator Tools

Use Cases

  • Rapid Pipeline Creation: Instantly generate GitHub Actions or Jenkins pipelines for new projects.
  • Multi-Stack CI/CD: Create pipelines for projects using multiple languages or frameworks.
  • Kubernetes Deployment: Generate manifests and deployment scripts for cloud-native applications.

Example: Generate a GitHub Actions Workflow

python3 .devcontainer/github-actions-generator-improved.py --language python --test pytest --docker true

3. Kubernetes Tools

Use Cases

  • Local Cluster Management: Use KinD or Minikube to spin up test clusters.
  • GitOps: Deploy with ArgoCD CLI or Flux for continuous delivery.
  • Secret Management: Use Kubeseal to manage encrypted secrets in Git.

Example: Sealing a Secret

kubectl create secret generic mysecret --from-literal=password=supersecret --dry-run=client -o yaml | kubeseal --cert mycert.pem -o yaml > sealedsecret.yaml

4. Customization and Extensibility

Use Cases

  • Add New Tools: Edit the Dockerfile to install additional CLI tools or SDKs.
  • Change Tool Versions: Update the versions section in devcontainer.env.json to pin or upgrade tool versions.

Example: Add AWS CLI

Edit the Dockerfile:

RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" \
    && unzip awscliv2.zip \
    && sudo ./aws/install

5. Advanced CI/CD Scenarios

Use Cases

  • Matrix Builds: Test across multiple language versions using GitHub Actions matrix strategy.
  • Multi-Environment Deployments: Generate separate pipelines for dev, staging, and prod.

Example: Matrix Build in GitHub Actions

jobs:
  test:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: [3.8, 3.9, 3.10]
    steps:
      - uses: actions/checkout@v2
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python-version }}
      - run: pip install -r requirements.txt
      - run: pytest

For more detailed examples, see the individual guides listed in the main README.md.