KVM, QEMU, qcow2 emulate

Place image.qcow2 in home directory and launch:

docker run \
    --name server2012r2 \
    --privileged \
    -v /dev:/dev \
    -v ${PWD}:/data \
    -e RAM=512 \
    -e SMP=1 \
    -e IMAGE=/data/image.qcow2 \
    -e VNC=tcp \
    -p 636:636 \
    -p 3389:3389 \
    -p 5900:5900 \
    -d ennweb/kvm

docker run --name server2012r2 \
    --privileged \
    -v /dev:/dev \
    -v /var/lib/libvirt/images:/data \
    -e RAM=2048 \
    -e IMAGE=/data/image.qcow2 \
    -p 3389:3389 \
corfr/docker-kvm

docker run --name server2012r2 \
    --privileged \
    -v /dev:/dev \
    -v ${PWD}:/data \
    -e RAM=512 \
    -e IMAGE=/data/image.qcow2 \
    -e TCP_PORTS=3389 \
    -e NETWORK=macvtap --net=host -e NETWORK_IF=eth0 -e NETWORK_BRIDGE=vtap0 \
    -p 3389:3389 \
-d ennweb/kvm

docker stop server2012r2 && docker rm server2012r2

Related:
https://hub.docker.com/r/ennweb/kvm
https://vorkbaard.nl/windows-server-2019-windows-10-vm-on-qemu-kvm-on-ubuntu-18-04/