Kubernetes is a system for managing containerized applications across a cluster of machines. Kubernetes runs all applications in containers. In the default setup, this is performed using the Docker engine, but Kubernetes also features support for using rkt as its container runtime backend. This allows a Kubernetes cluster to leverage some of rkt's security features and native pod support.
The container runtime is configured at the kubelet level. The kubelet is the agent that runs on each machine to manage containers. The kubelet provides several flags to use rkt as the container runtime:
--container-runtime=rktSets the node's container runtime to rkt.
--rkt-api-endpoint=HOST:PORTSets the endpoint of the rkt API service. Default to
--rkt-path=PATH_TO_RKT_BINARYSets the path of the rkt binary. If empty, it will search for rkt in
--rkt-stage1-image=STAGE1_NAMESets the name of the stage1 image, e.g.
coreos.com/rkt/stage1-coreos. If not set, the default stage1 image (
coreos.com/rkt/stage1-coreos) is used.
Check the rktnetes getting started guide for information about setting up and using a rktnetes cluster.
For baremetal, check out the Kubernetes guides here.
Minikube is a tool that makes it easy to run Kubernetes locally. It launches a single-node cluster inside a VM aimed at users looking to try out Kubernetes. Follow the instructions in the Minikube Quickstart section on how to get started with rktnetes.