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[Unit]
Description=Caddy webserver
Documentation=https://caddyserver.com/docs/
After=network-online.target
Wants=network-online.target systemd-networkd-wait-online.service
StartLimitIntervalSec=14400
StartLimitBurst=10
[Service]
User=caddy
Group=caddy
# environment: store secrets here such as API tokens
EnvironmentFile=-/var/lib/caddy/envfile
# data directory: uses $XDG_DATA_HOME/caddy
# TLS certificates and other assets are stored here
Environment=XDG_DATA_HOME=/var/lib
# config directory: uses $XDG_CONFIG_HOME/caddy
Environment=XDG_CONFIG_HOME=/etc
# do not print --environ here, as it may contain API tokens!!
ExecStart=/usr/bin/caddy run --config /etc/caddy/Caddyfile
ExecReload=/usr/bin/caddy reload --config /etc/caddy/Caddyfile
# Do not allow the process to be restarted in a tight loop.
Restart=on-abnormal
# Use graceful shutdown with a reasonable timeout
KillMode=mixed
KillSignal=SIGQUIT
TimeoutStopSec=5s
# Sufficient resource limits
LimitNOFILE=1048576
LimitNPROC=512
# Grants binding to port 443...
AmbientCapabilities=CAP_NET_BIND_SERVICE
# ...and limits potentially inherited capabilities to this
CapabilityBoundingSet=CAP_NET_BIND_SERVICE
# Hardening options
LockPersonality=true
NoNewPrivileges=true
PrivateTmp=true
PrivateDevices=true
ProtectControlGroups=true
ProtectHome=true
ProtectKernelTunables=true
ProtectKernelModules=true
ProtectSystem=strict
ReadWritePaths=/var/lib/caddy
ReadOnlyPaths=/etc/caddy
ReadOnlyPaths=-/var/lib/caddy/envfile
[Install]
WantedBy=multi-user.target
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