I have some simple software which I need to distribute on about 20 physical servers. I'm planning on using Ansible+Docker for provisioning the servers. These tools does not quite cover my needs though; I need the software to be running at all times. If a box is out for any reason, another node needs to spawn a new instance. This is pretty much what any of the orchestration tools offers, but I also have some network constraints:

• I need some control over where the instances run. A node cannot run all the instances.
• It would be nice to prefer another node that is as close as possible to the failing node in the network

Is Kubernetes the right fit for this system?

Also, does the system work without the Kubernetes master? Can the master be redundant as well?