TL;DR: It's possible to use VDSM images outside of Synology's VMM but it requires license checks to be defeated. As I don't condone piracy this route wasn't pursued further. When a VMM is used with ...

docker run -it --rm -p 5000:5000 --device=/dev/kvm --device=/dev/net/tun --cap-add NET_ADMIN --stop-timeout 120 vdsm/virtual-dsm Start the container ... However, by installing Synology's Virtual DSM, ...