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GitOps simplifies Kubernetes deployments by using a Git repository as the single source of truth. This approach ensures consistency, traceability, and control over infrastructure changes. Below, we explore a practical implementation using ArgoCD, Helm, and GitHub Actions to deploy a Flask application.
Key Components
- ArgoCD: A GitOps operator that syncs Kubernetes manifests from Git to your cluster.
- Helm: A package manager for Kubernetes, enabling templatized deployments.
- GitHub Actions: Automates CI/CD workflows triggered by Git events.
You Should Know: Practical Steps & Code
1. Set Up ArgoCD in Your Cluster
Install ArgoCD using the following commands:
kubectl create namespace argocd kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
Access the ArgoCD UI:
kubectl port-forward svc/argocd-server -n argocd 8080:443
Login with the default admin password:
kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d
2. Define Helm Charts for Flask App
Create a Helm chart structure:
helm create flask-app cd flask-app
Modify `values.yaml` to configure your Flask deployment:
replicaCount: 2 image: repository: your-docker-repo/flask-app tag: latest service: type: ClusterIP port: 5000
3. Configure GitHub Actions for CI/CD
Create `.github/workflows/deploy.yaml`:
name: Deploy to Kubernetes on: push: branches: [ main ] jobs: deploy: runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 - name: Install Helm run: | curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 chmod 700 get_helm.sh ./get_helm.sh - name: Deploy via ArgoCD run: | helm package flask-app git config --global user.name "GitHub Actions" git config --global user.email "[email protected]" git add . git commit -m "Update Helm chart" git push
4. Sync ArgoCD with Your Git Repo
In the ArgoCD UI, add your repository and create an Application:
– Repository URL: Your Git repo
– Path: `flask-app` (Helm chart dir)
– Destination Cluster: Your Kubernetes cluster
What Undercode Say
GitOps streamlines Kubernetes management by enforcing Git-based workflows. Key takeaways:
– Auditability: Every change is tracked via Git commits.
– Automation: GitHub Actions + ArgoCD reduce manual intervention.
– Security: Prevent configuration drift with Git as the source of truth.
Essential Commands for GitOps Workflow:
Check ArgoCD sync status argocd app get flask-app Rollback a Helm release helm rollback flask-app 1 Debug Kubernetes deployments kubectl logs -l app=flask-app kubectl describe pod flask-app-xyz
Expected Output:
A fully automated GitOps pipeline deploying Flask apps with Helm, ArgoCD, and GitHub Actions.
Reference:
GitOps in Action: Deploying Flask with GitHub Actions, Helm, and ArgoCD
References:
Reported By: Darryl Ruggles – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
