* Kubernetes 1.12 also enables [Kubelet device plugin registration](https://github.com/kubernetes/enhancements/issues/595) feature by default. Before upgrading to 1.12, ensure the `driver-registrar` CSI sidecar container for your CSI driver is configured to handle plugin registration (set the `--kubelet-registration-path` parameter on `driver-registrar` to expose a new unix domain socket to handle Kubelet Plugin Registration).

### Other notable changes

- Added a health check for the device plugin gRPC registration server. When the registration server is down, kubelet is marked as unhealthy. If systemd watchdog is configured, this will result in a kubelet restart. ([#128432](https://github.com/kubernetes/kubernetes/pull/128432), [@zhifei92](https://github.com/zhifei92))...

                                        const char* device);

// The calls to TF_AddInput and TF_AddInputList must match (in number,
// order, and type) the op declaration.  For example, the "Concat" op
// has registration:
//   REGISTER_OP("Concat")
//       .Input("concat_dim: int32")
//       .Input("values: N * T")
//       .Output("output: T")
//       .Attr("N: int >= 2")
//       .Attr("T: type");

        interface.
        *   Add custom ops and kernels through
            [kernel and op registration C API](https://github.com/tensorflow/community/blob/master/rfcs/20190814-kernel-and-op-registration.md).
        *   Register custom graph optimization passes with

([#64780](https://github.com/kubernetes/kubernetes/pull/64780), [@luxas](https://github.com/luxas))

- Added RuntimeClass restrictions and defaulting to PodSecurityPolicy. ([#73795](https://github.com/kubernetes/kubernetes/pull/73795), [@tallclair](https://github.com/tallclair))
- Kubelet plugin registration now has retry and exponential backoff logic for when registration of plugins (such as CSI or device plugin) fail. ([#73891](https://github.com/kubernetes/kubernetes/pull/73891), [@taragu](https://github.com/taragu))

- The kubelet plugin manager now properly handles plugin registration failures by removing failed plugins from the actual state and retrying with exponential backoff (initial delay 500ms, doubling each failure up to ~2 minutes maximum) to protect against broken plugins causing denial of service while still allowing...

- Kubelet: added retry of checking Unix domain sockets on Windows nodes for the plugin registration mechanism. ([#110075](https://github.com/kubernetes/kubernetes/pull/110075), [@luckerby](https://github.com/luckerby))

- Fix a bug that a node Lease object may have been created without OwnerReference. ([#84998](https://github.com/kubernetes/kubernetes/pull/84998), [@wojtek-t](https://github.com/wojtek-t))
- External facing APIs in plugin registration and device plugin packages are now available under k8s.io/kubelet/pkg/apis/ ([#83551](https://github.com/kubernetes/kubernetes/pull/83551), [@dims](https://github.com/dims))
### Release

* Fix registration for scheduling framework plugins with the default plugin set ([#72396](https://github.com/kubernetes/kubernetes/pull/72396), [@y-taka-23](https://github.com/y-taka-23))