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Implementing Blue-Green Deployment in Kubernetes with TLS Encryption Using Cert-Manager and Nginx Ingress
- In this guide, we’ll implement a Blue-Green Deployment in Kubernetes, utilizing Cert-Manager for automated TLS certificate management and Nginx Ingress for traffic routing.
- The tech stack includes Kubernetes, Cert-Manager, Nginx Ingress Controller, Helm, Let's Encrypt, MetalLB, and kubectl.
- Prerequisites include a Kubernetes cluster, kubectl, Helm, Cert-Manager, Nginx Ingress Controller, domain name, Let's Encrypt account, and basic networking knowledge.
- The architecture includes two environments – blue and green – with separate namespaces and labels, a Cloudflare API token secret for Cert-Manager, and a ClusterIssuer and Certificate referencing the issuer for free TLS certificates from Let's Encrypt.
- The deployments include terranetes-nodegreen and terranetes-nodeblue for green (default/live) and blue (new) environments, respectively, and services as a router/switch for different environments.
- The Ingress resource deploys to expose both services with TLS configuration and initial traffic routing between blue and green environments, with the ability to switch traffic effortlessly or rollback as needed.
- Optional weighted traffic splitting allows for gradual routing or monitoring user behavior before full migration.
- Implementing Blue-Green Deployment with TLS Encryption in Kubernetes enhances security, provides ease of switching, scalability, and rollback readiness, and is suitable for reliable production environments.
- Key takeaways include enhanced security, scalability, ease of switching, and rollback readiness.
- This setup is suitable for deploying applications confidently and ensuring user satisfaction.
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