Nomad dev here. We should definitely tick the simplicity box for you. If not, let me know. :)

Nomad is a single executable for the servers, clients, and CLI. Just download[0] & unzip the binary and run:

    nomad agent -dev > out &
    nomad init
    nomad run example.nomad
    nomad status example

And you have an example redis container running locally!

Nomad supports non-Docker drivers too: rkt, lxc templates, exec, raw exec, qemu, java.[1] To use the "exec" driver that doesn't use Docker for containerization you'll need to run nomad as root.

[0] https://www.nomadproject.io/downloads.html

[1] https://www.nomadproject.io/docs/drivers/index.html