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/apis/resource/validation/validation_resourceslice_test.go

@@ -32,10 +32,13 @@ func testResourceSlice(name, nodeName, driverName string) *resource.ResourceSlic
 		ObjectMeta: metav1.ObjectMeta{
 			Name: name,
 		},
-		NodeName:   nodeName,
-		DriverName: driverName,
-		ResourceModel: resource.ResourceModel{
-			NamedResources: &resource.NamedResourcesResources{},
+		Spec: resource.ResourceSliceSpec{
+			NodeName: nodeName,
+			Driver:   driverName,
+			Pool: resource.ResourcePool{
+				Name:               nodeName,
+				ResourceSliceCount: 1,
+			},
 		},
 	}
 }
@@ -180,22 +183,24 @@ func TestValidateResourceSlice(t *testing.T) {
 			}(),
 		},
 		"bad-nodename": {
-			wantFailures: field.ErrorList{field.Invalid(field.NewPath("nodeName"), badName, "a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')")},
-			slice:        testResourceSlice(goodName, badName, driverName),
+			wantFailures: field.ErrorList{
+				field.Invalid(field.NewPath("spec", "pool", "name"), badName, "a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')"),
+				field.Invalid(field.NewPath("spec", "nodeName"), badName, "a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')"),
+			},
+			slice: testResourceSlice(goodName, badName, driverName),
+		},
+		"bad-multi-pool-name": {
+			wantFailures: field.ErrorList{
+				field.Invalid(field.NewPath("spec", "pool", "name"), badName, "a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')"),
+				field.Invalid(field.NewPath("spec", "pool", "name"), badName, "a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')"),
+				field.Invalid(field.NewPath("spec", "nodeName"), badName+"/"+badName, "a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')"),
+			},
+			slice: testResourceSlice(goodName, badName+"/"+badName, driverName),
 		},
 		"bad-drivername": {
-			wantFailures: field.ErrorList{field.Invalid(field.NewPath("driverName"), badName, "a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')")},
+			wantFailures: field.ErrorList{field.Invalid(field.NewPath("spec", "driver"), badName, "a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')")},
 			slice:        testResourceSlice(goodName, goodName, badName),
 		},
-
-		"empty-model": {
-			wantFailures: field.ErrorList{field.Required(nil, "exactly one structured model field must be set")},
-			slice: func() *resource.ResourceSlice {
-				slice := testResourceSlice(goodName, goodName, driverName)
-				slice.ResourceModel = resource.ResourceModel{}
-				return slice
-			}(),
-		},
 	}
 
 	for name, scenario := range scenarios {
@@ -228,18 +233,26 @@ func TestValidateResourceSliceUpdate(t *testing.T) {
 			wantFailures: field.ErrorList{field.Invalid(field.NewPath("metadata", "name"), name+"-update", "field is immutable")},
 		},
 		"invalid-update-nodename": {
-			wantFailures:     field.ErrorList{field.Invalid(field.NewPath("nodeName"), name+"-updated", "field is immutable")},
+			wantFailures:     field.ErrorList{field.Invalid(field.NewPath("spec", "nodeName"), name+"-updated", "field is immutable")},
 			oldResourceSlice: validResourceSlice,
 			update: func(slice *resource.ResourceSlice) *resource.ResourceSlice {
-				slice.NodeName += "-updated"
+				slice.Spec.NodeName += "-updated"
 				return slice
 			},
 		},
 		"invalid-update-drivername": {
-			wantFailures:     field.ErrorList{field.Invalid(field.NewPath("driverName"), name+"-updated", "field is immutable")},
+			wantFailures:     field.ErrorList{field.Invalid(field.NewPath("spec", "driver"), name+"-updated", "field is immutable")},
 			oldResourceSlice: validResourceSlice,
 			update: func(slice *resource.ResourceSlice) *resource.ResourceSlice {
-				slice.DriverName += "-updated"
+				slice.Spec.Driver += "-updated"
+				return slice
+			},
+		},
+		"invalid-update-pool": {
+			wantFailures:     field.ErrorList{field.Invalid(field.NewPath("spec", "pool", "name"), validResourceSlice.Spec.Pool.Name+"-updated", "field is immutable")},
+			oldResourceSlice: validResourceSlice,
+			update: func(slice *resource.ResourceSlice) *resource.ResourceSlice {
+				slice.Spec.Pool.Name += "-updated"
 				return slice
 			},
 		},