Connect haproxy tcp socket

This shows how to connect your application listening on TCP port <port number> (started with "-p" option in mgrg) to HAProxy load balancer.

HAProxy can balance the load between different web servers, which in turn are connected to your applications. Since in this case HAProxy does not directly communicate with a Gliimly application (which is behind a web server), you may lookup examples of this online.

When you want HAProxy to directly communicate with a Gliimly application server, you may use configuration similar to this (shown is just a bare-bone setup needed to accomplish the goal):

global
    user haproxy
    group haproxy
    daemon

defaults
    mode    http
    timeout connect 5000
    timeout client  50000
    timeout server  50000
    errorfile 400 /etc/haproxy/errors/400.http
    errorfile 403 /etc/haproxy/errors/403.http
    errorfile 408 /etc/haproxy/errors/408.http
    errorfile 500 /etc/haproxy/errors/500.http
    errorfile 502 /etc/haproxy/errors/502.http
    errorfile 503 /etc/haproxy/errors/503.http
    errorfile 504 /etc/haproxy/errors/504.http

frontend front_server
    mode http
    bind *:90
    use_backend backend_servers if { path_reg -i ^.*\/func_test\/.*$ } 
    option forwardfor

fcgi-app gliim-fcgi
    log-stderr global
    docroot /var/lib/gg/func_test/app
    path-info ^.+(/func_test)(/.+)$ 

backend backend_servers                                                                                                                     
    mode http
    filter fcgi-app gliim-fcgi
    use-fcgi-app gliim-fcgi
    server s1 127.0.0.1:2301 proto fcgi

Restart HAProxy:

sudo systemctl restart haproxy

Note that Gliimly application path is "/func_test" (and the application name may or may not be the same, see request). The TCP port of the application is "2301" (could be any port number you choose that's greater than 1000 and lower than 65535).

HAProxy itself is bound to port 90, and "path_reg" specifies which URLs will be passed to your Gliimly application (i.e. they must have "/func_test/" in the URL). "path-info" specifies SCRIPT_NAME and PATH_INFO (as "()" regular sub-expressions), which are as such passed to your Gliimly application. "docroot" is set to the application home directory (see directories).

A Gliimly aplication (named "func_test") would have been started with (using the same application name "func_test" and TCP port "2301"):

mgrg -p 2301 func_test

Now you should be able to connect and load-balance your Gliimly application servers directly from HAProxy.