Zero-Downtime Deployments: Navigating SSL, Istio, and Kubernetes in Production

Containerizing an application is easy; orchestrating a multi-tenant cloud environment with automated traffic routing and seamless SSL renewals is where the real engineering happens.

This article breaks down a modern, production-ready DevOps pipeline using a cloud-agnostic approach. We discuss:

• Traffic Management with Istio: How to utilize service meshes for canary deployments and strict routing rules across different staging environments.

• Automated SSL at Scale: Setting up Certbot and Let's Encrypt alongside ingress controllers to automatically provision and renew wildcard certificates for subdomains without dropping active user connections.

• GitOps Workflows: Moving away from manual scripts and embracing declarative infrastructure-as-code to ensure that what exists in your GitHub repository perfectly mirrors your live production cluster.