Nginx06-Upstream-Directive

Upstream Directive and Load Balancing

• We have did this exercise for proxying and load balancing Apache-Tomcat with Nginx.
• Proxy with NGINX
• Load Balancing with NGINX
• Here while using the default function of loadbalancing with Nginx Upstream directive it uses round-robin method.
• Means if we have configured LoadBalancing between 2 nodes then the Nginx will forward traffic to 1 hit to 1 server and the 2nd hit to another and goes on.
• If we are clear that one of the 2 machines can handle more load then we can prioritize that host to have the number of consicutive connections through the weight function used along with the server in the upstream directive.
• Let us try this for the above Load Balancing concept of Tomcat
• OLD

upstream myTomcat {
    server dev01.linux-library.ll:8080;
    server dev02.linux-library.ll:8081;
}

• NEW

upstream myTomcat {
    server dev01.linux-library.ll:8080 weight=1;
    server dev02.linux-library.ll:8081 weight=2;
}

• Means 1 connection will be forwarded to dev01 and 2 connections will be forwarded to dev02.
• We are going to have 2 times the load of dev01 coming in dev02