Kubernetes: How Your Apps Find Each Other 🌐

Introduction: From Addresses to Orchestration In my previous posts, we covered the high-level architecture of Kubernetes and the networking fundamentals that help explain how devices find each other: IP addresses (street names + house numbers) Ports (doors) Private vs. Public IPs Localhost DNS Now it's time to connect the dots. Inside a Kubernetes cluster: Pods get their own IP addresses Services act as stable phone book entries so nothing gets lost when Pods come and go Ingress controllers manage traffic from the outside world Sound familiar? It's every concept from Networking 101, applied to containers. Kubernetes Networking: The Building's Internal Address System 🏢 Let's bring our networking knowledge into the Kubernetes building. Remember, we have: A cluster (the building) Nodes (the floors) Pods (the rooms) In Kubernetes, every Pod gets its own IP address. That's like every room in our building getting its own unique address. The Three Networking Challenges Kubernetes Solves Chal