kubelet: add support for dynamic resource allocation

Dependencies need to be updated to use
github.com/container-orchestrated-devices/container-device-interface.

It's not decided yet whether we will implement Topology support
for DRA or not. Not having any toppology-related code
will help to avoid wrong impression that DRA is used as a hint
provider for the Topology Manager.

Kubernetes-commit: ae0f38437cbb5c2b515384cb9f7dea5d808b87c4

pkg/apis/dra/OWNERS

@@ -0,0 +1,11 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+approvers:
+  - klueska
+  - pohly
+reviewers:
+  - klueska
+  - pohly
+  - bart0sh
+labels:
+  - sig/node

pkg/apis/dra/v1alpha1/api.proto

@@ -0,0 +1,81 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// To regenerate api.pb.go run hack/update-generated-kubelet-plugin-registration.sh
+
+syntax = "proto3";
+
+package v1alpha1;
+
+import "github.com/gogo/protobuf/gogoproto/gogo.proto";
+
+option go_package = "dra";
+option (gogoproto.goproto_stringer_all) = false;
+option (gogoproto.stringer_all) =  true;
+option (gogoproto.goproto_getters_all) = true;
+option (gogoproto.marshaler_all) = true;
+option (gogoproto.sizer_all) = true;
+option (gogoproto.unmarshaler_all) = true;
+option (gogoproto.goproto_unrecognized_all) = false;
+
+service Node {
+  rpc NodePrepareResource (NodePrepareResourceRequest)
+    returns (NodePrepareResourceResponse) {}
+
+  rpc NodeUnprepareResource (NodeUnprepareResourceRequest)
+    returns (NodeUnprepareResourceResponse) {}
+}
+
+message NodePrepareResourceRequest {
+    // The ResourceClaim namespace (ResourceClaim.meta.Namespace).
+    // This field is REQUIRED.
+    string namespace = 1;
+    // The UID of the Resource claim (ResourceClaim.meta.UUID).
+    // This field is REQUIRED.
+    string claim_uid = 2;
+    // The name of the Resource claim (ResourceClaim.meta.Name)
+    // This field is REQUIRED.
+    string claim_name = 3;
+    // Resource handle (AllocationResult.ResourceHandle)
+    // This field is REQUIRED.
+    string resource_handle = 4;
+}
+
+message NodePrepareResourceResponse {
+    // These are the additional devices that kubelet must
+    // make available via the container runtime. A resource
+    // may have zero or more devices.
+    repeated string cdi_devices = 1;
+}
+
+message NodeUnprepareResourceRequest {
+    // The ResourceClaim namespace (ResourceClaim.meta.Namespace).
+    // This field is REQUIRED.
+    string namespace = 1;
+    // The UID of the Resource claim (ResourceClaim.meta.UUID).
+    // This field is REQUIRED.
+    string claim_uid = 2;
+    // The name of the Resource claim (ResourceClaim.meta.Name)
+    // This field is REQUIRED.
+    string claim_name = 3;
+    // List of fully qualified CDI device names
+    // Kubelet plugin returns them in the NodePrepareResourceResponse
+    repeated string cdi_devices = 4;
+}
+
+message NodeUnprepareResourceResponse {
+    // Intentionally empty.
+}

pkg/apis/pluginregistration/v1/constants.go

@@ -21,4 +21,6 @@ const (
 	CSIPlugin = "CSIPlugin"
 	// DevicePlugin identifier for registered device plugins
 	DevicePlugin = "DevicePlugin"
+	// DRAPlugin identifier for registered Dynamic Resourc Allocation plugins
+	DRAPlugin = "DRAPlugin"
 )