Service Mesh and Service Discovery — How Microservices Find Each Other

Imagine a company with 50 employees, all sitting in one office. Communication is simple — you walk over to someone's desk and talk. Now imagine that company grows to 5,000 employees across 50 offices worldwide. Suddenly, communication needs infrastructure: phone systems, email servers, video conferencing, org charts to know who to contact for what.

Microservices architectures face the same scaling problem. When your application is one service talking to a database, networking is trivial. When your application is 50 services that need to communicate with each other, you need infrastructure dedicated to managing that communication. That infrastructure is called a service mesh.

You may never build a service mesh yourself. But you will encounter them in enterprise environments, and unde