docker-node-drain.service

#Systemd service to run node drain script on shutdown or reboot
[Unit]
Description=Drain Docker Swarm Node on Shutdown
After=network.target docker.service network-online.target
Requires=network-online.target docker.service

[Service]
Type=oneshot
ExecStop=/usr/local/bin/swarm-node-drain.sh
TimeoutStartSec=0
RemainAfterExit=true

[Install]
WantedBy=multi-user.target