This project demonstrates a simple reverse proxy and backend cluster setup using Node.js and Express. It includes a multi-backend server cluster, a reverse proxy with health checks and load balancing, and a load testing script.

• Multi-backend server cluster: Spawns multiple backend Express servers on different ports using Node.js clustering.
• Reverse proxy: Forwards incoming requests to healthy backend servers using round-robin load balancing.
• Health checks: Automatically checks backend health and removes unhealthy servers from the rotation.
• Load testing: Uses autocannon to benchmark the proxy and backend cluster.

• multi-backend-server.js: Launches a cluster of backend Express servers on ports 5001, 5002, ...
• multi-servers.js: Implements the reverse proxy server on port 3000, with round-robin load balancing and health checks for the backends.
• load-test.js: Runs a load test against the reverse proxy using autocannon.
• package.json: Project dependencies and scripts.

npm install

node multi-backend-server.js

node multi-servers.js

node load-test.js

• The backend cluster (multi-backend-server.js) launches several Express servers on sequential ports (default: 5001+).
• The reverse proxy (multi-servers.js) listens on port 3000 and forwards requests to healthy backend servers in a round-robin fashion. It checks /health endpoints on each backend every 5 seconds.
• The load test script (load-test.js) uses autocannon to benchmark the proxy.

• express
• http-proxy-middleware
• axios
• autocannon

Note: This project is for educational/demo purposes and is not production-hardened. For advanced use cases, consider using established reverse proxy solutions like NGINX or HAProxy.