I understand the Container Engine is currently on alpha and not yet complete.
From the docs I assume there is no auto-scaling of pods (e.g. depending on CPU load) ye
Kubernetes autoscaling: http://kubernetes.io/docs/user-guide/horizontal-pod-autoscaling/
kubectl command: http://kubernetes.io/docs/user-guide/kubectl/kubectl_autoscale/
Example: kubectl autoscale deployment foo --min=2 --max=5 --cpu-percent=80
kubectl autoscale deployment foo --min=2 --max=5 --cpu-percent=80