Guide to scaling Flask with multiple Gunicorn instances behind HAProxy: explains why load balancing matters (even traffic distribution, responsiveness, scalability, fault tolerance), shows creating a simple app, configuring dev/prod Gunicorn workers and binds, and setting up HAProxy (frontend/backend, roundrobin, health checks) to balance requests.
Load balancing is the process of distributing incoming network traffic across multiple servers to improve responsiveness, reliability, and scalability. Benefits include improved performance, increased uptime, and better scalability. Tools like HAProxy, NGINX, and Apache HTTP Server can be used for load balancing in a Node.js environment.
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