Two weeks ago, I gave a presentation at the 42nd Docker Paris Meetup about Rancher. Rancher is a Docker orchestrator and, as such, a competitor of Docker Swarm and Kubernetes. However, it has some other features that make it very interesting and not incompatible with Swarm or Kubernetes.
Here is the first part of the presentation:
a general presentation of Rancher, a first demonstration: creating and scaling an Elasticsearch cluster in Rancher.