CPU Manager

The CPU Manager is a new software component in Kubelet responsible for assigning pod containers to sets of CPUs on the local node. In later phases, the scope will expand to include caches, a critical shared processor resource. The kuberuntime notifies the CPU manager when containers come and go. The first such notification occurs in between the container runtime interface calls to create and start the container. The second notification occurs after the container is stopped by the container runtime. The CPU Manager writes CPU settings for containers using a new CRI method named UpdateContainerResources. This new method is invoked from two places in the CPU manager: during each call to AddContainer and also periodically from a separate reconciliation loop. This KEP supersedes and replaces kubernetes/enhancements/keps/sig-node/375-cpumanager/README.md.