Caddy 服务器安装与卸载 🚀
🌐 现代化的 Web 服务器，自动 HTTPS，配置简单
📋 目录
🎯 简介
🌟 Caddy 特点
- ✅ 自动 HTTPS：自动申请和续期 SSL 证书
- ✅ 简单配置：简洁的 Caddyfile 语法
- ✅ 高性能：基于 Go 语言开发
- ✅ 零依赖：单个二进制文件运行
🔗 重要链接
📦 安装方法
🐧 APT 安装（推荐）
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sudo apt update
sudo apt install caddy -y
caddy version
caddy list-modules
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📊 验证安装
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caddy version
systemctl status caddy
sudo netstat -tulnp | grep caddy
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🔧 自定义安装
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wget https://github.com/caddyserver/caddy/releases/download/v2.7.6/caddy_2.7.6_linux_amd64.tar.gz
tar -xzf caddy_2.7.6_linux_amd64.tar.gz
sudo mv caddy /usr/local/bin/
sudo chmod +x /usr/local/bin/caddy
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🗑️ 卸载方法
🔄 完整卸载步骤
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sudo systemctl stop caddy
sudo systemctl disable caddy
sudo apt remove caddy -y
sudo apt purge caddy
sudo apt autoremove -y
dpkg -l | grep caddy
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🧹 清理残留文件
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sudo rm -rf /etc/caddy/
sudo rm -rf /etc/ssl/caddy/
sudo rm -rf /var/log/caddy/
sudo rm -rf /var/lib/caddy/
sudo rm -f /usr/local/bin/caddy
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✅ 验证彻底卸载
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ps aux | grep caddy
which caddy
ls -la /usr/bin/caddy /usr/local/bin/caddy 2>/dev/null
systemctl list-unit-files | grep caddy
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🔧 维护命令
🛠️ 服务管理
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sudo systemctl start caddy
sudo systemctl stop caddy
sudo systemctl restart caddy
sudo systemctl reload caddy
sudo systemctl status caddy
sudo systemctl enable caddy
sudo systemctl disable caddy
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📝 配置管理
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sudo caddy validate --config /etc/caddy/Caddyfile
sudo caddy fmt --overwrite /etc/caddy/Caddyfile
sudo caddy adapt --config /etc/caddy/Caddyfile
sudo caddy environ
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📊 日志管理
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sudo journalctl -u caddy -f
sudo journalctl -u caddy --since "1 hour ago"
sudo journalctl -u caddy -p err
tail -f /var/log/caddy/access.log
tail -f /var/log/caddy/error.log
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⚙️ 配置文件
📁 配置文件结构
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| /etc/caddy/
├── Caddyfile
├── ssl/
│ ├── private.key
│ └── fullchain.pem
└── conf.d/
└── *.conf
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📝 基础配置示例
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{
http_port 80
https_port 443
auto_https disable_redirects
}
example.com {
root * /var/www/html
file_server
encode gzip
php_fastcgi unix//var/run/php/php-fpm.sock
log {
output file /var/log/caddy/access.log
format json
}
}
api.example.com {
reverse_proxy localhost:3000 {
header_up Host {host}
header_up X-Real-IP {remote}
header_up X-Forwarded-For {remote}
header_up X-Forwarded-Proto {scheme}
}
}
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🔒 SSL 配置
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https://mysite.com {
tls {
dns cloudflare {env.CF_API_TOKEN}
}
root * /var/www/mysite
file_server
}
https://mysite.com:8443 {
tls /etc/ssl/certs/mysite.crt /etc/ssl/private/mysite.key
root * /var/www/mysite
file_server
}
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🚀 快速开始
🎯 最小化配置
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sudo mkdir -p /var/www/html
echo "Hello Caddy!" | sudo tee /var/www/html/index.html
sudo tee /etc/caddy/Caddyfile > /dev/null <<'EOF'
:80 {
root * /var/www/html
file_server
}
EOF
sudo systemctl start caddy
curl http://localhost
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🔄 生产环境部署
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| #!/bin/bash
sudo mkdir -p /etc/caddy/ssl /var/log/caddy /var/lib/caddy
sudo chown -R www-data:www-data /var/log/caddy /var/lib/caddy
sudo tee /etc/caddy/Caddyfile > /dev/null <<'EOF'
{
email admin@example.com
on_demand_tls {
ask http://localhost:8080/check-domain
}
}
*.example.com {
tls {
on_demand
}
reverse_proxy localhost:3000
}
EOF
sudo systemctl enable caddy
sudo systemctl start caddy
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💡 最佳实践
🛡️ 安全建议
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sudo chown -R www-data:www-data /var/lib/caddy
sudo chmod 755 /var/lib/caddy
sudo chmod 600 /etc/caddy/ssl/*.key
sudo ufw allow 80/tcp comment 'Caddy HTTP'
sudo ufw allow 443/tcp comment 'Caddy HTTPS'
sudo apt update && sudo apt upgrade caddy
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📈 性能优化
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{
servers {
max_connections 1000
}
buffers {
read 4096
write 4096
}
timeouts {
read 30s
write 30s
idle 60s
}
log {
output file /var/log/caddy/access.log {
roll_size 100mb
roll_keep 10
}
}
}
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🔄 备份与恢复
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| #!/bin/bash
BACKUP_DIR="/backup/caddy/$(date +%Y%m%d)"
mkdir -p $BACKUP_DIR
cp -r /etc/caddy $BACKUP_DIR/
cp -r /var/lib/caddy $BACKUP_DIR/data/
cp -r /etc/ssl/caddy $BACKUP_DIR/ssl/
tar -czf $BACKUP_DIR/caddy-backup.tar.gz $BACKUP_DIR
echo "备份完成: $BACKUP_DIR/caddy-backup.tar.gz"
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🚨 故障排除
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sudo caddy run --config /etc/caddy/Caddyfile --watch
sudo lsof -i :80
sudo lsof -i :443
curl -v http://localhost
curl -vk https://localhost
sudo systemctl reset-failed caddy
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🎯 提示: Caddy 的配置非常灵活，建议从简单配置开始，逐步添加复杂功能。生产环境部署前请充分测试。
📚 学习资源:
🔧 需要帮助?:
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caddy help
caddy help modules
caddy environ
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