emqx4.3/deploy/packages/emqx.service

[Unit]
Description=emqx daemon
After=network.target

[Service]
User=emqx
Group=emqx
Type=forking
Environment=HOME=/var/lib/emqx
ExecStart=/usr/bin/emqx start
LimitNOFILE=1048576
ExecStop=/usr/bin/emqx stop
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target