>Requires:
Docker 1.5 or later
QEMU 2.0 or later
Xen 4.5 and VT enabled host (for Xen support)
So... not hypervisor agnostic.
edit: I realize it may not be the most popular among the hackernews crowd, but VMware is by far, not even remotely close, the most widely deployed hypervisor in the mid to large enterprise market segment. The graph looks similar to Windows on the desktop numbers. To claim hypervisor agnostic without VMware support is like claiming your desktop app is OS agnostic but doesn't support Windows.
As for my anecdote: out of the 20 fortune 500 companies I work with, the Xen/KVM market share is literally under 1%. Not a single deployed instance beyond a couple corner cases of Citrix for small VDI workloads.
There are a few looking at openstack, but they're still science experiments at this point, and not their production enterprise deployments.
I couldn't find it in the documentation, but am I right that this only works with full images docker-style, rather than mapped host filesystem? (like novm could)
I'm not sure about Hyper, but I know with qemu-KVM, there is a way to mount host directories inside the VM. It uses the 9p virtio filesystem. Clever use of this with docker volumes could do the trick. I'm not sure what the performance would be though. If you have an NFS mount on the host, it might be better to just directly mount the NFS share on the VM as well.
>Requires: Docker 1.5 or later QEMU 2.0 or later Xen 4.5 and VT enabled host (for Xen support)
So... not hypervisor agnostic.
edit: I realize it may not be the most popular among the hackernews crowd, but VMware is by far, not even remotely close, the most widely deployed hypervisor in the mid to large enterprise market segment. The graph looks similar to Windows on the desktop numbers. To claim hypervisor agnostic without VMware support is like claiming your desktop app is OS agnostic but doesn't support Windows.