Fix bug on service intention CRDs causing missed updates

.changelog/2194.txt

@@ -0,0 +1,3 @@
+```release-note:
+crd: fix bug on service intentions CRD causing some updates to be ignored.
+```

control-plane/api/v1alpha1/serviceintentions_types.go

@@ -234,18 +234,34 @@ func (in *ServiceIntentions) ConsulGlobalResource() bool {
 	return false
 }
 
+func normalizeEmptyToDefault(value string) string {
+	if value == "" {
+		return "default"
+	}
+	return value
+}
+
 func (in *ServiceIntentions) MatchesConsul(candidate api.ConfigEntry) bool {
 	configEntry, ok := candidate.(*capi.ServiceIntentionsConfigEntry)
 	if !ok {
 		return false
 	}
 
+	specialEquality := cmp.Options{
+		cmp.FilterPath(func(path cmp.Path) bool {
+			return path.String() == "Sources.Namespace"
+		}, cmp.Transformer("NormalizeNamespace", normalizeEmptyToDefault)),
+		cmp.FilterPath(func(path cmp.Path) bool {
+			return path.String() == "Sources.Partition"
+		}, cmp.Transformer("NormalizePartition", normalizeEmptyToDefault)),
+	}
+
 	// No datacenter is passed to ToConsul as we ignore the Meta field when checking for equality.
 	return cmp.Equal(
 		in.ToConsul(""),
 		configEntry,
 		cmpopts.IgnoreFields(capi.ServiceIntentionsConfigEntry{}, "Partition", "Namespace", "Meta", "ModifyIndex", "CreateIndex"),
-		cmpopts.IgnoreFields(capi.SourceIntention{}, "Partition", "Namespace", "LegacyID", "LegacyMeta", "LegacyCreateTime", "LegacyUpdateTime", "Precedence", "Type"),
+		cmpopts.IgnoreFields(capi.SourceIntention{}, "LegacyID", "LegacyMeta", "LegacyCreateTime", "LegacyUpdateTime", "Precedence", "Type"),
 		cmpopts.IgnoreUnexported(),
 		cmpopts.EquateEmpty(),
 		// Consul will sort the sources by precedence when returning the resource
@@ -255,6 +271,7 @@ func (in *ServiceIntentions) MatchesConsul(candidate api.ConfigEntry) bool {
 			// piggyback on strings.Compare that returns -1 if a < b.
 			return strings.Compare(sourceIntentionSortKey(a), sourceIntentionSortKey(b)) == -1
 		}),
+		specialEquality,
 	)
 }
 

control-plane/api/v1alpha1/serviceintentions_types_test.go

@@ -41,6 +41,78 @@ func TestServiceIntentions_MatchesConsul(t *testing.T) {
 			},
 			Matches: true,
 		},
+		"namespaces and partitions equate `default` and empty strings": {
+			Ours: ServiceIntentions{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "name",
+				},
+				Spec: ServiceIntentionsSpec{
+					Destination: IntentionDestination{
+						Name:      "svc-name",
+						Namespace: "ns1",
+					},
+					Sources: []*SourceIntention{
+						{
+							Name:      "svc1",
+							Namespace: "",
+							Partition: "default",
+							Action:    "allow",
+						},
+					},
+				},
+			},
+			Theirs: &capi.ServiceIntentionsConfigEntry{
+				Kind:      capi.ServiceIntentions,
+				Name:      "svc-name",
+				Namespace: "ns1",
+				Sources: []*capi.SourceIntention{
+					{
+						Name:       "svc1",
+						Namespace:  "default",
+						Partition:  "",
+						Action:     "allow",
+						Precedence: 0,
+					},
+				},
+			},
+			Matches: true,
+		},
+		"source namespaces and partitions are compared": {
+			Ours: ServiceIntentions{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "name",
+				},
+				Spec: ServiceIntentionsSpec{
+					Destination: IntentionDestination{
+						Name:      "svc-name",
+						Namespace: "test",
+					},
+					Sources: []*SourceIntention{
+						{
+							Name:      "svc1",
+							Namespace: "test",
+							Partition: "test",
+							Action:    "allow",
+						},
+					},
+				},
+			},
+			Theirs: &capi.ServiceIntentionsConfigEntry{
+				Kind:      capi.ServiceIntentions,
+				Name:      "svc-name",
+				Namespace: "test",
+				Sources: []*capi.SourceIntention{
+					{
+						Name:       "svc1",
+						Namespace:  "not-test",
+						Partition:  "not-test",
+						Action:     "allow",
+						Precedence: 0,
+					},
+				},
+			},
+			Matches: false,
+		},
 		"all fields set matches": {
 			Ours: ServiceIntentions{
 				ObjectMeta: metav1.ObjectMeta{