Book Image

Nginx Troubleshooting

By : Alexey Kapranov
Book Image

Nginx Troubleshooting

By: Alexey Kapranov

Overview of this book

Nginx is clearly winning the race to be the dominant software to power modern websites. It is fast and open source, maintained with passion by a brilliant team. This book will help you maintain your Nginx instances in a healthy and predictable state. It will lead you through all the types of problems you might encounter as a web administrator, with a special focus on performance and migration from older software. You will learn how to write good configuration files and will get good insights into Nginx logs. It will provide you solutions to problems such as missing or broken functionality and also show you how to tackle performance issues with the Nginx server. A special chapter is devoted to the art of prevention, that is, monitoring and alerting services you may use to detect problems before they manifest themselves on a big scale. The books ends with a reference to error and warning messages Nginx could emit to help you during incident investigations.
Table of Contents (15 chapters)
Nginx Troubleshooting
About the Author
About the Reviewers
Rare Nginx Error Messages

Why Nginx is so fast?

The question is intentionally formulated in an oversimplified way. This is what you might hear from your boss or client—let us migrate from old technologies to Nginx because it will make our website faster and users happier. The migration process is described in thousands of online articles and even some books, and we will not write about it here. Many of our readers have probably gone down that path several times and know the facts: first, it is usually true that websites get faster and second, no, it is not usually a full migration. You will rarely dispose of Apache completely and plug Nginx in its place. Although this "total conversion" also happens, most of the time you start with inserting Nginx between Apache and the Internet. To understand why this is okay, why this helps at all, and how to move forward from there, read on.

To describe the main conceptual change that is implemented by using Nginx as a reverse proxy we will use, for simplicity, the processing model...