feat(events) list Kong name for multi-Services

Include the Kong service name when emitting Events related to
multi-Service backend annotation inconsistency. This name indicates the
parent route resource. Reviewing the route resource will show the other
Services used by the problem rule.

CHANGELOG.md

@@ -92,6 +92,9 @@ Adding a new version? You'll need three changes:
 - Change existing `resolvedRefs` condition in status `HTTPRoute` if there is
   already one to avoid multiple appearance of conditions with same type
   [#3386](https://github.com/Kong/kubernetes-ingress-controller/pull/3386)
+- Event messages for invalid multi-Service backends now indicate their derived
+  Kong resource name.
+  [#3318](https://github.com/Kong/kubernetes-ingress-controller/pull/3318)
 
 ### Deprecated
 

internal/dataplane/parser/ingressrules.go

@@ -59,7 +59,7 @@ func (ir *ingressRules) populateServices(log logrus.FieldLogger, s store.Storer,
 
 		// if the Kubernetes services have been deemed invalid, log an error message
 		// and skip the current service.
-		if !servicesAllUseTheSameKongAnnotations(k8sServices, seenAnnotations, failuresCollector) {
+		if !servicesAllUseTheSameKongAnnotations(k8sServices, seenAnnotations, failuresCollector, key) {
 			// The Kong services not having all the k8s services correctly annotated must be marked
 			// as to be skipped.
 			serviceNamesToSkip[key] = nil
@@ -255,6 +255,7 @@ func servicesAllUseTheSameKongAnnotations(
 	services []*corev1.Service,
 	annotations map[string]string,
 	failuresCollector *failures.ResourceFailuresCollector,
+	kongServiceName string,
 ) bool {
 	match := true
 	for _, service := range services {
@@ -270,9 +271,10 @@ func servicesAllUseTheSameKongAnnotations(
 			valueForThisObject, ok := service.Annotations[k]
 			if !ok {
 				failuresCollector.PushResourceFailure(
-					fmt.Sprintf("in the backend group of %d kubernetes services some have the %s annotation while others don't. "+
-						"this is not supported: when multiple services comprise a backend all kong annotations "+
-						"between them must be set to the same value", len(services), k),
+					fmt.Sprintf("Service has inconsistent %s annotation and is used in multi-Service backend %s. "+
+						"All Services in a multi-Service backend must have matching Kong annotations. Review the "+
+						"associated route resource and align annotations in its multi-Service backends.",
+						k, kongServiceName),
 					service.DeepCopy(),
 				)
 				match = false
@@ -282,9 +284,10 @@ func servicesAllUseTheSameKongAnnotations(
 
 			if valueForThisObject != v {
 				failuresCollector.PushResourceFailure(
-					fmt.Sprintf("the value of annotation %s is different between the %d services which comprise this backend. "+
-						"this is not supported: when multiple services comprise a backend all kong annotations "+
-						"between them must be set to the same value", k, len(services)),
+					fmt.Sprintf("Service has inconsistent %s annotation and is used in multi-Service backend %s. "+
+						"All Services in a multi-Service backend must have matching Kong annotations. Review the "+
+						"associated route resource and align annotations in its multi-Service backends.",
+						k, kongServiceName),
 					service.DeepCopy(),
 				)
 				match = false

internal/dataplane/parser/ingressrules_test.go

@@ -477,7 +477,7 @@ func TestDoK8sServicesMatchAnnotations(t *testing.T) {
 			},
 			expected: false,
 			expectedLogEntries: []string{
-				"in the backend group of 3 kubernetes services some have the konghq.com/foo annotation while others don't",
+				"Service has inconsistent konghq.com/foo annotation and is used in multi-Service backend",
 			},
 		},
 		{
@@ -519,16 +519,16 @@ func TestDoK8sServicesMatchAnnotations(t *testing.T) {
 			},
 			expected: false,
 			expectedLogEntries: []string{
-				"the value of annotation konghq.com/foo is different between the 3 services which comprise this backend.",
-				"the value of annotation konghq.com/foo is different between the 3 services which comprise this backend.",
+				"Service has inconsistent konghq.com/foo annotation and is used in multi-Service backend",
+				"Service has inconsistent konghq.com/foo annotation and is used in multi-Service backend",
 			},
 		},
 	} {
 		t.Run(tt.name, func(t *testing.T) {
 			logger, loggerHook := test.NewNullLogger()
 			failuresCollector, err := failures.NewResourceFailuresCollector(logger)
 			require.NoError(t, err)
-			assert.Equal(t, tt.expected, servicesAllUseTheSameKongAnnotations(tt.services, tt.annotations, failuresCollector))
+			assert.Equal(t, tt.expected, servicesAllUseTheSameKongAnnotations(tt.services, tt.annotations, failuresCollector, ""))
 			assert.Len(t, failuresCollector.PopResourceFailures(), len(tt.expectedLogEntries), "expecting as many translation failures as log entries")
 			for i := range tt.expectedLogEntries {
 				assert.Contains(t, loggerHook.AllEntries()[i].Message, tt.expectedLogEntries[i])

test/integration/translation_failures_test.go

@@ -127,7 +127,8 @@ func TestTranslationFailures(t *testing.T) {
 				return expectedTranslationFailure{
 					// expect event for service2 as it doesn't have annotations that service1 has
 					causingObjects: []client.Object{service2},
-					reasonContains: "when multiple services comprise a backend all kong annotations between them must be set to the same value",
+					reasonContains: "All Services in a multi-Service backend must have matching Kong annotations. " +
+						"Review the associated route resource and align annotations in its multi-Service backends.",
 				}
 			},
 		},