DRA: new API for 1.31

This is a complete revamp of the original API. Some of the key
differences:
- refocused on structured parameters and allocating devices
- support for constraints across devices
- support for allocating "all" or a fixed amount
  of similar devices in a single request
- no class for ResourceClaims, instead individual
  device requests are associated with a mandatory
  DeviceClass

For the sake of simplicity, optional basic types (ints, strings) where the null
value is the default are represented as values in the API types. This makes Go
code simpler because it doesn't have to check for nil (consumers) and values
can be set directly (producers). The effect is that in protobuf, these fields
always get encoded because `opt` only has an effect for pointers.

The roundtrip test data for v1.29.0 and v1.30.0 changes because of the new
"request" field. This is considered acceptable because the entire `claims`
field in the pod spec is still alpha.

The implementation is complete enough to bring up the apiserver.
Adapting other components follows.

pkg/scheduler/framework/plugins/dynamicresources/structuredparameters.go

@@ -54,20 +54,36 @@ type assumeCacheLister interface {
 // with an unknown structured parameter model silently ignored. An error gets
 // logged later when parameters required for a pod depend on such an unknown
 // model.
-func newResourceModel(logger klog.Logger, resourceSliceLister resourceSliceLister, claimAssumeCache assumeCacheLister, inFlightAllocations *sync.Map) (resources, error) {
-	model := make(resources)
+func newResourceModel(logger klog.Logger, resourceSliceLister resourceSliceLister, claimAssumeCache assumeCacheLister, inFlightAllocations *sync.Map) (resourceMap, error) {
+	model := make(resourceMap)
 
 	slices, err := resourceSliceLister.List(labels.Everything())
 	if err != nil {
 		return nil, fmt.Errorf("list node resource slices: %w", err)
 	}
 	for _, slice := range slices {
-		if model[slice.NodeName] == nil {
-			model[slice.NodeName] = make(map[string]ResourceModels)
+		if slice.NamedResources == nil {
+			// Ignore unknown resource. We don't know what it is,
+			// so we cannot allocated anything depending on
+			// it. This is only an error if we actually see a claim
+			// which needs this unknown model.
+			continue
 		}
-		resource := model[slice.NodeName][slice.DriverName]
-		namedresourcesmodel.AddResources(&resource.NamedResources, slice.NamedResources)
-		model[slice.NodeName][slice.DriverName] = resource
+		instances := slice.NamedResources.Instances
+		if model[slice.NodeName] == nil {
+			model[slice.NodeName] = make(map[string]Resources)
+		}
+		resources := model[slice.NodeName][slice.DriverName]
+		resources.Instances = make([]Instance, 0, len(instances))
+		for i := range instances {
+			instance := Instance{
+				NodeName:               slice.NodeName,
+				DriverName:             slice.DriverName,
+				NamedResourcesInstance: &instances[i],
+			}
+			resources.Instances = append(resources.Instances, instance)
+		}
+		model[slice.NodeName][slice.DriverName] = resources
 	}
 
 	objs := claimAssumeCache.List(nil)
@@ -90,12 +106,23 @@ func newResourceModel(logger klog.Logger, resourceSliceLister resourceSliceListe
 				continue
 			}
 			if model[structured.NodeName] == nil {
-				model[structured.NodeName] = make(map[string]ResourceModels)
+				model[structured.NodeName] = make(map[string]Resources)
 			}
-			resource := model[structured.NodeName][handle.DriverName]
+			resources := model[structured.NodeName][handle.DriverName]
 			for _, result := range structured.Results {
-				// Call AddAllocation for each known model. Each call itself needs to check for nil.
-				namedresourcesmodel.AddAllocation(&resource.NamedResources, result.NamedResources)
+				// Same as above: if we don't know the allocation result model, ignore it.
+				if result.NamedResources == nil {
+					continue
+				}
+				instanceName := result.NamedResources.Name
+				for i := range resources.Instances {
+					if resources.Instances[i].NamedResourcesInstance.Name == instanceName {
+						resources.Instances[i].Allocated = true
+						break
+					}
+				}
+				// It could be that we don't know the instance. That's okay,
+				// we simply ignore the allocation result.
 			}
 		}
 	}