A new set of Docker tools

Openstack isn't a virtualization or container technology. It's not even like 'libvirt' or some other container/vm management solution like Ovirt/Vmware/etc.

The best way to think about Openstack is that it's a datacenter operating system. You use it for managing networks, machines, virtual networks, virtual machines, load balancers, administration tools, user permissions for managing/interacting different portions of your datacenter, etc etc. You have identity management services, authentication services, quota sytsems, etc.

Now, of course, it focuses on virtual machines and that sort of thing. ie 'The Cloud'.

Docker and Openstack really are not directly comparible.