This is a WIP, currently using ROOT and has some errors when starting regarding permissions, but my site worked as expected.
I use a seperate script for each site hosted
https://github.com/caddyserver/caddy/tree/master/dist/init/linux-systemd
Run Once:
sudo setcap 'cap_net_bind_service=+ep' /usr/local/bin/caddy sudo mkdir /etc/caddy sudo chown -R root:root /etc/caddy sudo mkdir /etc/ssl/caddy sudo chown -R root:www-data /etc/ssl/caddy sudo chmod 0770 /etc/ssl/caddy
WebSite Setup:
mkdir /etc/caddy/domain/ cat << 'EOF' >/etc/caddy/domain/Caddyfile ---- EOF chmod 644 /etc/caddy/domain/Caddyfile chown root:root /etc/caddy/domain/Caddyfile
SystemD Service File:
cat << 'EOF' >/etc/systemd/system/domain.caddy.service [Unit] Description=Caddy HTTP/2 web server Documentation=https://caddyserver.com/docs After=network-online.target Wants=network-online.target systemd-networkd-wait-online.service ; Do not allow the process to be restarted in a tight loop. If the ; process fails to start, something critical needs to be fixed. StartLimitIntervalSec=14400 StartLimitBurst=10 [Service] Restart=on-abnormal ; User and group the process will run as. User=root Group=root ; Letsencrypt-issued certificates will be written to this directory. Environment=CADDYPATH=/etc/ssl/caddy ; Always set "-root" to something safe in case it gets forgotten in the Caddyfile. ExecStart=/usr/local/bin/caddy run -config=/etc/caddy/domain/Caddyfile --adapter caddyfile ExecReload=/bin/kill -USR1 $MAINPID ; Use graceful shutdown with a reasonable timeout KillMode=mixed KillSignal=SIGQUIT TimeoutStopSec=5s ; Limit the number of file descriptors; see `man systemd.exec` for more limit settings. LimitNOFILE=1048576 ; Unmodified caddy is not expected to use more than that. LimitNPROC=512 ; Use private /tmp and /var/tmp, which are discarded after caddy stops. PrivateTmp=true ; Use a minimal /dev (May bring additional security if switched to 'true', but it may not work on Raspberry Pi's or other devices, so it has been disabled in this dist.) PrivateDevices=false ; Hide /home, /root, and /run/user. Nobody will steal your SSH-keys. ProtectHome=true ; Make /usr, /boot, /etc and possibly some more folders read-only. ProtectSystem=full ; … except /etc/ssl/caddy, because we want Letsencrypt-certificates there. ; This merely retains r/w access rights, it does not add any new. Must still be writable on the host! ReadWritePaths=/etc/ssl/caddy ReadWriteDirectories=/etc/ssl/caddy ; The following additional security directives only work with systemd v229 or later. ; They further restrict privileges that can be gained by caddy. Uncomment if you like. ; Note that you may have to add capabilities required by any plugins in use. ;CapabilityBoundingSet=CAP_NET_BIND_SERVICE ;AmbientCapabilities=CAP_NET_BIND_SERVICE ;NoNewPrivileges=true [Install] WantedBy=multi-user.target EOF EOF chmod +x /etc/systemd/system/domain.caddy.service systemctl enable /etc/systemd/system/domain.caddy.service systemctl start /etc/systemd/system/domain.caddy.service systemctl status /etc/systemd/system/domain.caddy.service