Why Choose This Project?

Minimizing downtime during application updates is a critical requirement for modern cloud-native applications. Blue-Green Deployment ensures seamless release of new versions without affecting users. This project demonstrates how to automate blue-green deployments on Kubernetes, integrating CI/CD pipelines and monitoring for zero-downtime updates.

What You Get

Automated blue-green deployment pipeline for applications
Kubernetes cluster setup with two environments (Blue & Green)
CI/CD integration to automatically deploy new versions
Traffic switching between environments using Ingress or Service mesh
Rollback capability in case of failed deployment
Monitoring and alerts for deployment health
Dashboard for deployment status and version tracking

Key Features

Technology Stack

CI/CD & Automation:

• Jenkins / GitLab CI / GitHub Actions

Containerization & Orchestration:

• Docker for application packaging

• Kubernetes cluster (AWS EKS / Azure AKS / GCP GKE)

• Helm for deployment templating

Traffic Management:

• Kubernetes Ingress / Istio Service Mesh

Monitoring & Visualization:

• Prometheus & Grafana

• Optional: Slack/Email notifications for deployment events

Cloud Services Used

• AWS / Azure / GCP Kubernetes – Host blue-green application environments

• Container Registry – AWS ECR / Azure ACR / GCP Container Registry

• Prometheus / Grafana – Monitor application and deployment health

• Cloud Notification Services – SNS / Azure Alerts / Cloud Functions for notifications

Working Flow

1. Code Commit – Developers push code to Git repository.

2. Pipeline Trigger – CI/CD pipeline automatically builds, tests, and packages the application.

3. Deploy to Idle Environment – New version is deployed to the inactive environment (Blue or Green).

4. Health Checks – Automated health checks ensure the deployment is stable.

5. Switch Traffic – Kubernetes Ingress or Istio routes traffic from old environment to new.

6. Monitor & Alert – Prometheus/Grafana monitors system health and sends alerts for failures.

7. Rollback (Optional) – If health checks fail, traffic reverts to previous environment automatically.

Main Modules

• CI Module – Builds and tests application artifacts

• CD Module – Deploys artifacts to idle environment using Helm or kubectl

• Traffic Management Module – Switches user traffic between Blue & Green environments

• Monitoring Module – Tracks deployment health and metrics

• Rollback Module – Automated rollback if deployment fails

• Notification Module – Sends alerts for success/failure events

Security Features

• Role-based access for CI/CD pipelines

• Secure container images stored in private registries

• TLS/HTTPS for all Kubernetes Ingress traffic

• Audit logs for all deployment and traffic switch actions