HAProxy Enterprise Documentation 2.4r1

Fcgi-app

A fcgi-app section defines how HAProxy Enterprise should connect to a FastCGI application.

Fcgi-app configuration examples

In the next configuration sample, we have added an fcg-app section that configures how HAProxy Enterprise should connect to PHP-FPM server, which is a FastCGI implementation for PHP. Each fcgi-app keyword is followed by a label, such as php_fpm, to differentiate it from others.

fcgi-app php_fpm
   # Your configuration settings
   # the directory that contains your PHP files on the remote server
   docroot /var/www/myapp

   # the name of the PHP script to call if no other file name is given in the request URL
   index index.php

   # the regular expression that extracts the PHP file name from the request of the request URL
   path-info ^(/.+\.php)(/.*)?$

   # sends FastCGI error messages to the log destination specified in the global section
   log-stderr global

backend php_servers
   use-fcgi-app php_fpm
   server s1 192.168.1.10:9000 proto fcgi

The use-fcgi-app directive in backend php_servers instructs HAProxy Enterprise to use the fcgi-app settings for that pool of servers. The proto fcgi field also needs to be added for each server line.

Connecting to a FastCGI application via a UNIX socket

HAProxy Enterprise can connect to a FastCGI application listening at an IP address, or to a UNIX domain socket, as shown in the configuration sample below.

Specifying a socket means that the FastCGI application runs locally and HAProxy Enterprise needs to be able to access this socket. The group directive in the global section adds HAProxy Enterprise to the group that owns the socket, which in our example is www-data.

global
   log /dev/log local0
   user haproxy

   # PHP-FPM application's UNIX socket is owned by the www-data group
   group www-data

backend php_servers
   use-fcgi-app php_fpm
   server s1 /run/php/myapp.sock proto fcgi

See also

FastCGI

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