The default port for installing web services (apache or nginx) on the haproxy server is 80, which conflicts with the port set in the haproxy configuration file, so just close the web service or change the port.

Haproxy provides high availability, load balancing and proxy based on TCP and HTTP applications, and supports virtual hosts. This is a free, fast and reliable solution. Haproxy is especially suitable for those websites with heavy load, which usually requires session maintenance or seven-layer processing. Haproxy runs on the current hardware and can support tens of thousands of concurrent connections. And its running mode can be easily and safely integrated into your current architecture, while protecting your web server from being exposed to the network.