[Unit]
Description=Pluggable authoritative DNS server
After=network.target

[Service]
Type=simple
User=constellation
Group=constellation
ExecStartPre=/sbin/setcap 'cap_net_bind_service=+ep' /usr/bin/constellation
ExecStart=/usr/bin/constellation -c /etc/constellation.cfg
Restart=on-failure
PermissionsStartOnly=true
LimitNOFILE=infinity

[Install]
WantedBy=multi-user.target