使用 Caddy 替代 Nginx，全站升级 https，配置更加简单

## Caddy 是什么？ Caddy 是一个多功能的 HTTP web服务器，并且使用Let’s Encrypt提供的免费证书，自动让网站升级到HTTPS

Every Site on HTTPS Caddy is a general-purpose HTTP/2 web server that serves HTTPS by default. Fork Caddy On Github

为什么要使用 Caddy

安全 Caddy 是一个默认使用https协议的web服务器
无依赖 Caddy 使用 Go 语言编写，编译好的二进制文件能够运行在任何支持Go语言的平台，不需要自己安装任何库。
使用简单 Caddy 的配置简单，不管你是新的web开发者，还是专业人士，都能够快速上手

安装以及运行

下载 Caddy download 在官网上选择指定的平台，下载指定平台的运行包。这里以 CentOS 7.0 x64 为例。选择 Linux 64-bit，然后点 DOWNLOAD。通过ftp将下载好的包上传到服务器，或者复制出下载地址直接在服务端 wget https://caddyserver.com/download/linux/amd64。使用 wget 的模式下载下来的文件名是 amd64。 tar -xzvf amd64 解压，解压后文件如下。我们可以直接运行 ./caddy，这样就启动了一个静态的web服务器，根目录为当前目录，端口为 2015，可以通过你服务器的ip地址加上:2015 进行访问了。如果你访问的时候，报404异常，在你当前目录下添加一个 index.html 文件即可。

Caddyfile 配置

这里我们看一下官网的例子说明 Caddy Documentation

:2015                    # Host: (any), Port: 2015
localhost                # Host: localhost; Port: 2015
localhost:8080           # Host: localhost; Port: 8080
example.com              # Host: example.com; Ports: 80->443
http://example.com       # Host: example.com; Port: 80
https://example.com      # Host: example.com; Ports: 80->443
http://example.com:1234  # Host: example.com; Port: 1234
https://example.com:80   # Error! HTTPS on port 80
*.example.com            # Hosts: *.example.com; Port: 2015
example.com/foo/         # Host: example.com; Ports: 80, 443; Path: /foo/
/foo/                    # Host: (any), Port: 2015, Path: /foo/

通过上面这些例子，就可以大概了解到Caddy的域名适配规则。

这个是我的所有站点的配置，可以看出来相比Nginx简单了很多: log 用于记录访问日志 gzip 用于启用gzip压缩 proxy 用于支持反向代理 websocket 用于支持websocket协议所有的插件文档，可以 Caddy Documentation 从官方文档上看到，都有详细的配置说明，简单易上手。使用 caddy -conf Caddyfile 就可以使用配置文件来启动，确保80和443端口没有被服务占用。 Caddyfile 文件:

diamondfsd.com {  # 启动 http 和 https，访问 http 会自动转跳到 https
        log access_log.log  # 日志
        gzip  # 使用gzip压缩
        proxy / http://127.0.0.1:3999 { # 路径转发
                header_upstream Host {host}
                header_upstream X-Real-IP {remote}
                header_upstream X-Forwarded-For {remote}
                header_upstream X-Forwarded-Proto {scheme}
        }
}

http://api.diamondfsd.com https://api.diamondfsd.com {  # 同时启用 http 和 https 不会自动转跳
        gzip
        proxy / http://127.0.0.1:4999 {
                header_upstream Host {host}
                header_upstream X-Real-IP {remote}
                header_upstream X-Forwarded-For {remote}
                header_upstream X-Forwarded-Proto {scheme}
        }
}

hook.diamondfsd.com {
        proxy / http://127.0.0.1:9000 {
                header_upstream Host {host}
                header_upstream X-Real-IP {remote}
                header_upstream X-Forwarded-For {remote}
                header_upstream X-Forwarded-Proto {scheme}
        }
}

http://file.diamondfsd.com {
        proxy / http://127.0.0.1:22222
}

https://file.diamondfsd.com {
        root /data/file-upload  # 指定静态文件根目录
}

yd.diamondfsd.com {
        gzip
        root /data/ydig
        proxy /ws http://127.0.0.1:9001 {  # 转发所有 /ws 为 websocket
                websocket
        }
}

8.diamondfsd.com {
        gzip
        root /data/quaver
}

在对比同等情况下 nginx 的配置:

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

events {
    worker_connections 1024;
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    gzip on;
    gzip_min_length 1k;
    gzip_buffers 16 64k;
    gzip_http_version 1.1;
    gzip_comp_level 6;
    gzip_types application/json application/xml text/plain application/javascript text/css image/jpeg image/gif image/png text/javascript;
    gzip_vary on;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.

    server {
        listen 80;
        server_name diamondfsd.com www.diamondfsd.com;
        rewrite ^(.*) https://$server_name$1 permanent;
    }

    server {
		server_name diamondfsd.com www.diamondfsd.com;
		listen 443;
		ssl on;
		ssl_certificate /etc/letsencrypt/live/diamondfsd.com/fullchain.pem;
		ssl_certificate_key /etc/letsencrypt/live/diamondfsd.com/privkey.pem;

		location / {
		   proxy_pass http://127.0.0.1:3999;
		   proxy_http_version 1.1;
		   proxy_set_header X_FORWARDED_PROTO https;
		   proxy_set_header X-Real-IP $remote_addr;
			   proxy_set_header X-Forwarded-For $remote_addr;
		   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
			   proxy_set_header Host $host;
		}
    }



    server {
		server_name api.diamondfsd.com;
		listen 443;
		ssl on;
		ssl_certificate /etc/letsencrypt/live/api.diamondfsd.com/fullchain.pem;
		ssl_certificate_key /etc/letsencrypt/live/api.diamondfsd.com/privkey.pem;

		location / {
		   proxy_pass http://127.0.0.1:4999;
		   proxy_http_version 1.1;
		   proxy_set_header X_FORWARDED_PROTO https;
			   proxy_set_header X-Real-IP $remote_addr;
			   proxy_set_header X-Forwarded-For $remote_addr;
			   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
			   proxy_set_header Host $host;

		}
    }

    server {
     	server_name api.diamondfsd.com;
		listen 80;
        location / {
           proxy_pass http://127.0.0.1:4999;
           proxy_http_version 1.1;
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header X-Forwarded-For $remote_addr;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
           proxy_set_header Host $host;
        }
    }

    server {
        server_name hook.diamondfsd.com;
        listen 80;
        location / {
           proxy_pass http://127.0.0.1:9000;
           proxy_http_version 1.1;
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header X-Forwarded-For $remote_addr;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
           proxy_set_header Host $host;
        }

    }

    server {
       server_name file.diamondfsd.com;
       listen 80;
       location / {
           proxy_pass http://127.0.0.1:22222;
           proxy_http_version 1.1;
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header X-Forwarded-For $remote_addr;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
           proxy_set_header Host $host;
       }
    }

    server {
		server_name file.diamondfsd.com;
		listen 443;
		ssl on;
		ssl_certificate /etc/letsencrypt/live/file.diamondfsd.com/fullchain.pem;
		ssl_certificate_key /etc/letsencrypt/live/file.diamondfsd.com/privkey.pem;

		root /data/file-upload;
		expires max;
        access_log /data/file-domain.log;
    }

    server {
        listen 80;
        server_name yd.diamondfsd.com;
        rewrite ^(.*) https://$server_name$1 permanent;
    }

    server {
		server_name yd.diamondfsd.com;
		listen 443;
		ssl on;
		ssl_certificate /etc/letsencrypt/live/yd.diamondfsd.com/fullchain.pem;
		ssl_certificate_key /etc/letsencrypt/live/yd.diamondfsd.com/privkey.pem;

		location /ws/ {
		   proxy_pass http://127.0.0.1:9001;
		   proxy_http_version 1.1;
		   proxy_set_header Host $host;
		   proxy_set_header Upgrade $http_upgrade;
		   proxy_set_header Connection "upgrade";
		}

		root /data/ydig;
		expires max;
		access_log /data/ydig-domain.log;
    }

    server {
        listen 80;
        server_name about.diamondfsd.com;
        rewrite ^(.*) https://$server_name$1 permanent;
    }

    server {
		server_name about.diamondfsd.com;
		listen 443;
		ssl on;
		ssl_certificate /etc/letsencrypt/live/about.diamondfsd.com/fullchain.pem;
		ssl_certificate_key /etc/letsencrypt/live/about.diamondfsd.com/privkey.pem;

		root /data/about-me;
		expires max;
		access_log /data/about-me-domain.log;
    }
    server {
        server_name 8.diamondfsd.com;
		listen 80;
        rewrite ^(.*) https://$server_name$1 permanent;
    }
    server {
		server_name 8.diamondfsd.com;
		listen 443;
		ssl on;
		ssl_certificate /etc/letsencrypt/live/8.diamondfsd.com/fullchain.pem;
		ssl_certificate_key /etc/letsencrypt/live/8.diamondfsd.com/privkey.pem;

		root /data/quaver;
		expires max;
		access_log /data/quaver-domain.log;
    }
}

可以看出，相较于Nginx来说，Caddy 的配置简单了很多，而且默认启用了 https，更加的安全。这篇文章也比较简单，更高级的应用大家可以去阅读官方文档。有什么问题和简介，欢迎大家相互讨论。