Docker registry mirror systemd service unit file

docker-registry-mirror.service

[Unit]
Description=Docker registry mirror
After=docker.service
Requires=docker.service

[Service]
Environment=UNIT=docker-registry-mirror
TimeoutStartSec=0
ExecStartPre=/usr/bin/docker pull registry
ExecStartPre=-/usr/bin/docker run --name ${UNIT}-dvc -v /tmp/registry busybox true
ExecStartPre=-/usr/bin/docker rm ${UNIT}
ExecStart=/usr/bin/docker run --name ${UNIT} \
	-e MIRROR_SOURCE=https://registry-1.docker.io \
	-e MIRROR_SOURCE_INDEX=https://index.docker.io \
	-e MIRROR_TAGS_CACHE_TTL=2592000 \
	-p 5000:5000 \
	--volumes-from ${UNIT}-dvc \
	registry
ExecStop=/usr/bin/docker stop ${UNIT}