Load balancing with nginx for FastCGI processes

Question

I have one FCGI process and its three instances are running on three different ports.

I am using nginx as reverse proxy server and now I want to use it for load balancing also. But I don't know how to configure it for fcgi processes.

I have configuration like this:

location /abc {  
    fastcgi_pass backend;
}

upstream backend {

}

I can use the configuration mentioned in 2nd answer and it also works fine. https://serverfault.com/questions/598202/make-nginx-to-pass-hostname-of-the-upstream-when-reverseproxying

But I want to know how can I write fcgi process in upstream and how to pass some params to that fcgi process. Main problem is that I have to pass some variables coming through front-end request.

Richard Smith Richard Smith · Accepted Answer · 2017-02-28T07:52:32

Parameters are passed using the fastcgi_param directive. Use the PHP example as a template.

The upstream block should be populated with server statements. For example:

upstream backend {
    server 127.0.0.1:8000;
    server 127.0.0.1:8001;
    server 127.0.0.1:8002;
}

See this document for more.

Load balancing with nginx for FastCGI processes

2 Answers