CI/CD with Kubernetes

CI/CD (Continuous Integration and Continuous Deployment) automates application building, testing, and deployment pipelines. Integrating CI/CD with Kubernetes enables faster iteration and reliable rollouts.

Typical CI/CD Flow with Kubernetes:

Code Push: Developer pushes code to Git.
CI Pipeline: Tools like GitHub Actions, GitLab CI, or Jenkins build and test the app.
Docker Build: Build the Docker image and push it to a container registry (e.g., Docker Hub, ECR).
CD Pipeline: Kubernetes YAMLs or Helm charts are applied to update the cluster.

Popular CI/CD Tools:

Jenkins: Highly customizable and widely adopted.
GitHub Actions: Easy to integrate if code is on GitHub.
Argo CD & Flux: For GitOps-based deployment (more below).

Example GitHub Action for Kubernetes:

name: Deploy to K8s
on:
  push:
    branches:
      - main
jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v2
    - name: Set up Kubectl
      uses: azure/setup-kubectl@v1
    - name: Deploy YAMLs
      run: kubectl apply -f k8s/

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