You can use this images as base containers to run systemd services inside.
- Run the container as a daemon
docker run -d --name systemd --tmpfs /tmp --tmpfs /run --tmpfs /run/lock -v /sys/fs/cgroup:/sys/fs/cgroup:ro jrei/$IMAGE
or if it doesn't work
docker run -d --name systemd --privileged -v /sys/fs/cgroup:/sys/fs/cgroup:ro jrei/$IMAGE
- Enter to the container
docker exec -it systemd sh
- Remove the container
docker rm -f systemd