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Load balancer as a proxy server or redirector

Current situation: I wrote a C # application server that interacts with some applications (Computer / Smartphone / Web). Now I have a problem that the application server has to deal with a lot of requests, and it will be very slow.

My idea was to change the application server to work in a software cluster. To choose the right application server, I want to write a load balancer that selects the application server with the least workload.

My problem is that I do not know how to write load-balancer. If the load balancer works as a proxy server, so that all traffic passes through the load balancer or redirects the load to the application server and the application communicates directly with the application server.

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, Apache + mod_cluster. ... Apache + mod_cluster → Tomcat1, Tomcat2, Tomcat3, Tomcat4. Apache + mod_cluster, , Tomcat1, Tomcat2, Tomcat3, Tomcat4. , Apache. Stick.

The main advantage of mod_cluster is server-side load balancing. Apache + mod_cluster can also handle HTTPS requests.

http://mod-cluster.jboss.org/

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