aws ec2 安装caddy2

```bash
sudo yum install go -y

go install github.com/caddyserver/xcaddy/cmd/xcaddy@latest

go/bin/xcaddy build
./caddy version
sudo cp caddy /usr/bin
# /usr/bin is the path used in example systemd unit files from
# caddy server.org, so if you don't use this path, you'd edit those
caddy version

#  following: see https://caddyserver.com/docs/running

sudo groupadd --system caddy
sudo useradd --system \
    --gid caddy \
    --create-home \
    --home-dir /var/lib/caddy \
    --shell /usr/sbin/nologin \
    --comment "Caddy web server" \
    caddy
#  not shown but required: you create a file named  /etc/systemd/system/caddy.service
# 这里我加的systemd配置文件，作为参考。
vim  /etc/systemd/system/caddy.service
[Unit]
Description=Caddy
Documentation=https://caddyserver.com/docs/
After=network.target network-online.target
Requires=network-online.target

[Service]
Type=notify
User=caddy
Group=caddy
ExecStart=/usr/bin/caddy run --environ --config /etc/caddy/Caddyfile
ExecReload=/usr/bin/caddy reload --config /etc/caddy/Caddyfile --force
TimeoutStopSec=5s
LimitNOFILE=1048576
LimitNPROC=512
PrivateTmp=true
ProtectSystem=full
AmbientCapabilities=CAP_NET_BIND_SERVICE

[Install]
WantedBy=multi-user.target

#  as per docs/running link above, use one of the two unit files
#  as a templat.  After which, if you are using a Caddyfile:

sudo mkdir /etc/caddy

#  And then create a Caddyfile in there at /etc/caddy/Caddyfile

sudo systemctl daemon-reload
sudo systemctl enable --now caddy
systemctl status -l caddy
```

# Reference Link

https://stackoverflow.com/questions/73347341/cannot-download-caddy-package-on-yum