[gnur]

Because Kubernetes, even though it is still young, is a lot more mature then Docker Swarm.

Kubernetes is also based on years of running containers with Google itself, it solves real problems. Allowing containers to run in the same pod allows for much nicer composability than running multiprocess containers.

Have you tried setting up a k8s cluster recently, I believe they added kubeadm for much easier setup in 1.5, which was released a few weeks ago.