bugfix: ingress state build failure when ingress class non-existent (#33)

* Avoid ingress state build failure when ingresses reference non-existent ingress classes

Signed-off-by: Michael Tweten <[email protected]>

* Test case file update

- Update test-ingress-state_withnamedclasses.yaml

---------

Signed-off-by: Michael Tweten <[email protected]>
Co-authored-by: Inbaraj S <[email protected]>

Author: mtweten

pkg/state/ingressstate.go

@@ -90,11 +90,9 @@ func (s *StateStore) BuildState(ingressClass *networkingv1.IngressClass) error {
 
 	var ingressGroup []*networkingv1.Ingress
 	for _, ing := range ingressList {
-		ingIc, err := util.GetIngressClass(ing, s.IngressClassLister)
-		if err != nil {
-			return errors.Wrap(err, "error getting ingress class")
-		}
-		if ingIc != nil && ingressClass.Name == ingIc.Name && !util.IsIngressDeleting(ing) {
+		if ((ing.Spec.IngressClassName == nil && ingressClass.Annotations[util.IngressClassIsDefault] == "true") ||
+			(ing.Spec.IngressClassName != nil && ingressClass.Name == *ing.Spec.IngressClassName)) &&
+			!util.IsIngressDeleting(ing) {
 			ingressGroup = append(ingressGroup, ing)
 		}
 	}

pkg/state/ingressstate_test.go

@@ -34,6 +34,7 @@ const (
 	ListenerProtocolConfigValidationsFilePath = "validate-listener-protocol-config.yaml"
 	TestIngressStateFilePath                  = "test-ingress-state.yaml"
 	TestIngressStateWithPortNameFilePath      = "test-ingress-state_withportname.yaml"
+	TestIngressStateWithNamedClassesFilePath  = "test-ingress-state_withnamedclasses.yaml"
 )
 
 func setUp(ctx context.Context, ingressClassList *networkingv1.IngressClassList, ingressList *networkingv1.IngressList, testService *v1.ServiceList) (networkinglisters.IngressClassLister, networkinglisters.IngressLister, corelisters.ServiceLister) {
@@ -226,6 +227,25 @@ func TestIngressStateWithPortName(t *testing.T) {
 	assertCases(stateStore)
 }
 
+func TestIngressStateWithNamedClasses(t *testing.T) {
+	RegisterTestingT(t)
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ingressClassList := testutil.GetIngressClassList()
+
+	ingressList := testutil.ReadResourceAsIngressList(TestIngressStateWithNamedClassesFilePath)
+
+	testService := testutil.GetServiceListResourceWithPortName("default", "tls-test", 80, "tls-port")
+	ingressClassLister, ingressLister, serviceLister := setUp(ctx, ingressClassList, ingressList, testService)
+
+	stateStore := NewStateStore(ingressClassLister, ingressLister, serviceLister, nil)
+	err := stateStore.BuildState(&ingressClassList.Items[0])
+	Expect(err).NotTo(HaveOccurred())
+
+	assertCases(stateStore)
+}
+
 func assertCases(stateStore *StateStore) {
 	ingressName := "ingress-state"
 	allBs := stateStore.GetAllBackendSetForIngressClass()

pkg/state/test-ingress-state_withnamedclasses.yaml

@@ -0,0 +1,123 @@
+#
+# OCI Native Ingress Controller
+#
+# Copyright (c) 2023 Oracle America, Inc. and its affiliates.
+# Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl/
+#
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: ingress-state
+  namespace: default
+spec:
+  ingressClassName: default-ingress-class
+  tls:
+  - hosts:
+      - foo.bar.com
+    secretName: secret_name
+  rules:
+  - host: "foo.bar.com"
+    http:
+      paths:
+      - pathType: Prefix
+        path: "/PrefixEcho1"
+        backend:
+          service:
+            name: tls-test
+            port:
+              number: 80
+  - host: "foo.bar.com"
+    http:
+      paths:
+      - pathType: Prefix
+        path: "/ExactEcho1"
+        backend:
+          service:
+            name: tls-test
+            port:
+              number: 70
+---
+
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: ingress-state-excluded
+  namespace: default
+spec:
+  ingressClassName: missing-ingress-class
+  tls:
+    - hosts:
+        - foo.bar.com
+      secretName: secret_name
+  rules:
+    - host: "foo.bar.com"
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/PrefixEcho1/aa"
+            backend:
+              service:
+                name: tls-test
+                port:
+                  number: 80
+    - host: "foo.bar.com"
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/ExactEcho1"
+            backend:
+              service:
+                name: tls-test
+                port:
+                  number: 90
+    - http:
+        paths:
+          - pathType: Prefix
+            path: "/PrefixEcho1"
+            backend:
+              service:
+                name: tls-test
+                port:
+                  number: 100
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: ingress-state-new
+  namespace: default
+spec:
+  ingressClassName: default-ingress-class
+  tls:
+  - hosts:
+      - foo.bar.com
+    secretName: secret_name
+  rules:
+  - host: "foo.bar.com"
+    http:
+      paths:
+      - pathType: Prefix
+        path: "/PrefixEcho1/aa"
+        backend:
+          service:
+            name: tls-test
+            port:
+              number: 80
+  - host: "foo.bar.com"
+    http:
+      paths:
+      - pathType: Prefix
+        path: "/ExactEcho1"
+        backend:
+          service:
+            name: tls-test
+            port:
+              number: 90
+  - http:
+      paths:
+      - pathType: Prefix
+        path: "/PrefixEcho1"
+        backend:
+          service:
+            name: tls-test
+            port:
+              number: 100