Non-Stoppable Python 3 HTTP Server Example

A minimal Python 3 HTTP server that keeps running even when it receives graceful shutdown signals (SIGTERM / SIGINT). Useful for demonstrating long-running containerized processes.

Requirements

• Python 3
• make (optional, for convenience)
• Docker (optional, for containerized run)

Quick Start

Run locally:

make run

Or without make:

python3 server.py

The server listens on 0.0.0.0:8080 by default. Change the port with the PORT environment variable:

PORT=9000 python3 server.py

Endpoints

Method	Path	Response
GET	/	Hello, World! (text/plain)
GET	/health	{"status":"ok"} (application/json)
*	*	404 Not Found

Testing

make test

This starts the server in the background, verifies both endpoints with curl, and then forcefully terminates the process.

Docker

Build and run:

make docker-build
make docker-run

Stop the container:

make stop

"Non-Stoppable" Behavior

The server registers handlers for SIGTERM and SIGINT. When either signal arrives, the handler logs the signal and returns, allowing the server to continue serving. The process exits only on SIGKILL or an unhandled fatal error.