Graceful shutdown is one of those things every backend service needs but few teams implement correctly — until something breaks in production. I learned this the hard way when a deployment left in-flight database writes half-committed, causing data inconsistencies that took a full day to resolve. Here is the complete pattern I have settled on for Go services, including the edge cases most tutorials skip. What Happens Without Graceful Shutdown When a container orchestrator (ECS, Kubernetes) wants to stop a task, it sends SIGTERM to the process. By default, most Go servers ignore it — the process keeps accepting new connections, existing requests finish eventually, and the orchestrator gives up and sends SIGKILL , killing everything immediately. Any in-flight HTTP requests, open database transactions, or messages being processed from a queue are abandoned mid-operation. On a busy service this is guaranteed to cause problems. The real damage depends on what your service does: HTT...