[nginx] Detailed explanation of nginx configuration file

1 Overview

Let's first look at the configuration diagram of Nginx:

main        # 全局配置
├── events  # 配置网络连接
├── http    # 配置代理、缓存、日志等
│   ├── upstream # 配置负载均衡
│   ├── server   # 配置虚拟主机，可以有多个 server
│   ├── server
│   │   ├── location  # 用于匹配 URI（URL 是 URI 的一种），可以有多个 location
│   │   ├── location
│   │   └── ...
│   └── ...
└── ...

Let's pull out the default configuration of Nginx and take a look. I added a comment, so that everyone can easily understand what this line of configuration is used for.

worker_processes