Install Caddy on Ubuntu LTS 22.04

Caddy一套用Go撰寫的Web Server，算比較新的的Web Server

它本身是二進制檔案，沒有依賴，部署上是輕鬆的

Caddy支援Windows / Linux / macOS

Caddy優點 

• HTTP/2
• 支持HTTP/3
• Automatic HTTPS
• Multi-core
• Websockets
• Markdown
• Reverse proxy
• Load balancing
• Static WEB
• IPv6
• Custom Log
• Micro Service

Caddy缺點

• 性能相較於Nginx / Apache還是略差
• 功能較少
• 社群不夠龐大

安裝命令如下

sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | sudo tee /etc/apt/sources.list.d/caddy-stable.list
sudo apt update
sudo apt install -y caddy

下方就是預設的配置，非常清楚

80 port 的跟目錄是哪個資料夾

:80 {
        # Set this path to your site's directory.
        root * /usr/share/caddy

        # Enable the static file server.
        file_server

        # Another common task is to set up a reverse proxy:
        # reverse_proxy localhost:8080

        # Or serve a PHP site through php-fpm:
        # php_fastcgi localhost:9000
}

不過Caddy對我來說，比較好用應該是Reverse proxy
向下方這個配置來說，有人連到7777 port，會自動反向代理到9001port上，配置上相比Nginx來說是較為簡單

:9001 {
        respond "I am CY"
}

:7777 {
        reverse_proxy :9001
}

不過以商業的角度來說，Nginx還是比較強的，畢竟是用C撰寫出來相比Go性能還是絕對強悍

Caddy比較適合用在個人網站，或是開發時可以拿來稍微用下