type ContainerManager interface {
	// Runs the container manager's housekeeping.
	// - Ensures that the Docker daemon is in a container.
	// - Creates the system container where all non-containerized processes run.
	Start() error

	// Returns resources allocated to system cgroups in the machine.
	// These cgroups include the system and Kubernetes services.
	SystemCgroupsLimit() api.ResourceList

	// Returns a NodeConfig that is being used by the container manager.
	GetNodeConfig() NodeConfig

	// Returns internal Status.
	Status() Status
}

type NodeConfig struct {
	RuntimeCgroupsName string
	SystemCgroupsName  string
	KubeletCgroupsName string
	ContainerRuntime   string
}

type Status struct {
	// Any soft requirements that were unsatisfied.
	SoftRequirements error
}