references

https://velog.io/@wanny328/Linux-HAproxy-사용법[https://velog.io/@wanny328/Linux-HAproxy-사용법](https://velog.io/@wanny328/Linux-HAproxy-사용법)

Hardware Load Balancing

Reverse Proxy & Forward Proxy

Load Balancing 방식들

HaProxy 동작 원리