Out of the box, Docker contains an orchestration framework and a management platform very architecturally similar to the one covered just a second ago, called Docker Swarm. Swarm allows a pretty quick and simple way to get scaling integrated with your platform with minimal ramp-up time and given that it is already a part of Docker itself, you really don't need much else to deploy a simple set of services in a clustered environment. As an added benefit, it contains a pretty solid service discovery framework, has multi-host networking capability, and uses TLS for communication between nodes.

The cluster configuration for Docker Swarm can be a simple YAML file, but the downside is that GUI tools are, at the time of writing this, somewhat lacking, though Portainer (https://portainer.io) and Shipyard (https://shipyard-project.com) are getting to be pretty decent, so this might not be a problem for too long. Additionally, some large-scale ops tooling is missing and it seems that generally, features of Swarm are heavily evolving and thus in a state of flux, so my personal recommendation would be to use this type of orchestration if you need to get something up and running quickly on small-to-largish scales. As this product gets more and more mature (and since Docker Inc. is placing a lot of development resources behind this), it will probably improve significantly, and I expect it to match Kubernetes features in many respect so keep an eye out for its feature news.