Nginx + PHPfpm timeout test

README.md

Nginx + PHPfpm timeout test

Test the connection timeout by tweaking those parameters: fastcgi_read_timeout, request_terminate_timeout, set_time_limit.

• If hitting the fastcgi_read_timeout setting, Nginx will terminate the HTTP connection with a HTTP 504
• If hitting the request_terminate_timeout setting, PHPfpm will terminate the HTTP connection with a HTTP 502
• If hitting the set_time_limit setting, PHP itself will terminate the HTTP connection with a HTTP 200

docker-compose.yml

version: '2'
services:
  phpfpm:
    image: php:7.1-fpm
    volumes:
      - "./:/var/www/html"
      - ./phpfpm.conf:/usr/local/etc/php-fpm.d/zzz-www.conf
  nginx:
    image: nginx:stable
    volumes:
      - "./:/var/www/html"
      - ./nginx.conf:/etc/nginx/conf.d/zzz-nginx.conf
    ports:
      - 8888:8080
    links:
      - phpfpm

index.php

<?php
/**
 * @see https://easyengine.io/tutorials/php/increase-script-execution-time/
 * @see https://stackoverflow.com/questions/16002268/prevent-nginx-504-gateway-timeout-using-php-set-time-limit
 */
register_shutdown_function(function() {
  echo "shutdown function called\n";
});
// If hit, returns HTTP 200 + PHP "Fatal error: Maximum execution time"
set_time_limit(15); // Set time limit
for (;;) ;         // Busy wait

nginx.conf

server {
    listen       8080 default_server;
    server_name  _;
    root /var/www/html;
    index index.php;
    charset utf-8;
    location / {
        try_files $uri $uri/ /index.php$is_args$args;
        location ~ \.php$ {
            fastcgi_split_path_info ^(.+\.php)(/.+)$;
            fastcgi_pass   phpfpm:9000;
            fastcgi_index  index.php;
            include fastcgi_params;
            fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
            fastcgi_param  SERVER_NAME     $http_host;
            fastcgi_intercept_errors on;

            # If hit, returns 504 Gateway Time-out
            # http://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_read_timeout
            fastcgi_read_timeout 5;
            # (number of seconds)

        }
    }
}

phpfpm.conf

pm = static
pm.max_children = 20
pm.max_requests = 10000

; number of seconds
; returns 502 Bad Gateway
request_terminate_timeout = 10