Book Image

Mastering NGINX - Second Edition

By : Dimitri Aivaliotis
Book Image

Mastering NGINX - Second Edition

By: Dimitri Aivaliotis

Overview of this book

NGINX is a high-performance HTTP server and mail proxy designed to use very few system resources. But despite its power it is often a challenge to properly configure NGINX to meet your expectations. Mastering Nginx is the solution – an insider’s guide that will clarify the murky waters of NGINX’s configuration. Tune NGINX for various situations, improve your NGINX experience with some of the more obscure configuration directives, and discover how to design and personalize a configuration to match your needs. To begin with, quickly brush up on installing and setting up the NGINX server on the OS and its integration with third-party modules. From here, move on to explain NGINX's mail proxy module and its authentication, and reverse proxy to solve scaling issues. Then see how to integrate NGINX with your applications to perform tasks. The latter part of the book focuses on working through techniques to solve common web issues and the know-hows using NGINX modules. Finally, we will also explore different configurations that will help you troubleshoot NGINX server and assist with performance tuning.
Table of Contents (20 chapters)
Mastering NGINX - Second Edition
About the Author
About the Reviewer
Directive Reference
Persisting Solaris Network Tunings

Tracking website visitors

A fairly unobtrusive way to track unique website visitors is to use the userid module. This module sets cookies that are used to identify unique clients. The value of these cookies is referenced by the $uid_set variable. When that same user returns to the site and the cookie is still valid, the value is available in the $uid_got variable. An example of how to use these cookies is as follows:

http {

  log_format useridcomb '$remote_addr - $uid_got [$time_local] '
  '"$request" $status $body_bytes_sent '
  '"$http_referer" "$http_user_agent"';

  server {


    access_log logs/ useridcomb;

    userid on;
    userid_name uid;


    userid_path /;

    userid_expires 365d;

    userid_p3p 'policyref="/w3c/p3p.xml", CP="CUR ADM OUR NORSTA NID"';



These directives are summarized in the following table:

Userid module directives



This directive activates the...