Update kubeletplugin API for DynamicResourceAllocation to v1alpha2

This PR makes the NodePrepareResources() and NodeUnprepareResource()
calls of the kubeletplugin API for DynamicResourceAllocation
symmetrical. It wasn't clear how one would use the set of CDIDevices
passed back in the NodeUnprepareResource() of the v1alpha1 API, and the
new API now passes back the full ResourceHandle that was originally
passed to the Prepare() call. Passing the ResourceHandle is strictly
more informative and a plugin could always (re)derive the set of
CDIDevice from it.

This is a breaking change, but this release is scheduled to break
multiple APIs for DynamicResourceAllocation, so it makes sense to do
this now instead of later.

Signed-off-by: Kevin Klues <[email protected]>

Kubernetes-commit: 579295e727a12deadad9e084ff8efd2708707091

pkg/apis/dra/v1alpha1/api.proto → pkg/apis/dra/v1alpha2/api.proto

@@ -1,5 +1,5 @@
 /*
-Copyright 2022 The Kubernetes Authors.
+Copyright 2023 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.
@@ -18,8 +18,8 @@ limitations under the License.
 
 syntax = "proto3";
 
-package v1alpha1;
-option go_package = "k8s.io/kubelet/pkg/apis/dra/v1alpha1";
+package v1alpha2;
+option go_package = "k8s.io/kubelet/pkg/apis/dra/v1alpha2";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
@@ -49,7 +49,7 @@ message NodePrepareResourceRequest {
     // The name of the Resource claim (ResourceClaim.meta.Name)
     // This field is REQUIRED.
     string claim_name = 3;
-    // Resource handle (AllocationResult.ResourceHandle)
+    // Resource handle (AllocationResult.ResourceHandles[*].Data)
     // This field is REQUIRED.
     string resource_handle = 4;
 }
@@ -71,9 +71,9 @@ message NodeUnprepareResourceRequest {
     // 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;
+    // Resource handle (AllocationResult.ResourceHandles[*].Data)
+    // This field is REQUIRED.
+    string resource_handle = 4;
 }
 
 message NodeUnprepareResourceResponse {