[Unit]
Description=BIND9 Container
After=docker.service
Requires=docker.service

[Service]
TimeoutStartSec=0
Restart=always
ExecStartPre=-/usr/bin/docker stop bind9
ExecStartPre=-/usr/bin/docker rm bind9
# note: this container is actually provding DNS service, so when that is missing, the pull fails.
# ExecStartPre=/usr/bin/docker pull docker.io/internetsystemsconsortium/bind9:9.18
ExecStart=/etc/bind/run_bind_container.sh

[Install]
WantedBy=multi-user.target