Add status subresource to Ingress

pkg/api/validation/validation.go

@@ -1994,3 +1994,24 @@ func ValidatePodLogOptions(opts *api.PodLogOptions) errs.ValidationErrorList {
 	}
 	return allErrs
 }
+
+// ValidateLoadBalancerStatus validates required fields on a LoadBalancerStatus
+func ValidateLoadBalancerStatus(status *api.LoadBalancerStatus) errs.ValidationErrorList {
+	allErrs := errs.ValidationErrorList{}
+	for _, ingress := range status.Ingress {
+		if len(ingress.IP) > 0 {
+			if isIP := (net.ParseIP(ingress.IP) != nil); !isIP {
+				allErrs = append(allErrs, errs.NewFieldInvalid("ingress.ip", ingress.IP, "must be an IP address"))
+			}
+		}
+		if len(ingress.Hostname) > 0 {
+			if valid, errMsg := NameIsDNSSubdomain(ingress.Hostname, false); !valid {
+				allErrs = append(allErrs, errs.NewFieldInvalid("ingress.hostname", ingress.Hostname, errMsg))
+			}
+			if isIP := (net.ParseIP(ingress.Hostname) != nil); isIP {
+				allErrs = append(allErrs, errs.NewFieldInvalid("ingress.hostname", ingress.Hostname, "must be a DNS name, not ip address"))
+			}
+		}
+	}
+	return allErrs
+}

pkg/apis/extensions/validation/validation.go

@@ -447,6 +447,14 @@ func ValidateIngressUpdate(oldIngress, ingress *extensions.Ingress) errs.Validat
 	return allErrs
 }
 
+// ValidateIngressStatusUpdate tests if required fields in the Ingress are set when updating status.
+func ValidateIngressStatusUpdate(ingress, oldIngress *extensions.Ingress) errs.ValidationErrorList {
+	allErrs := errs.ValidationErrorList{}
+	allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&ingress.ObjectMeta, &oldIngress.ObjectMeta).Prefix("metadata")...)
+	allErrs = append(allErrs, apivalidation.ValidateLoadBalancerStatus(&ingress.Status.LoadBalancer).Prefix("status.loadBalancer")...)
+	return allErrs
+}
+
 func validateIngressRules(IngressRules []extensions.IngressRule) errs.ValidationErrorList {
 	allErrs := errs.ValidationErrorList{}
 	if len(IngressRules) == 0 {

pkg/apis/extensions/validation/validation_test.go

@@ -951,6 +951,98 @@ func TestValidateIngress(t *testing.T) {
 	}
 }
 
+func TestValidateIngressStatusUpdate(t *testing.T) {
+	defaultBackend := extensions.IngressBackend{
+		ServiceName: "default-backend",
+		ServicePort: util.IntOrString{Kind: util.IntstrInt, IntVal: 80},
+	}
+
+	newValid := func() extensions.Ingress {
+		return extensions.Ingress{
+			ObjectMeta: api.ObjectMeta{
+				Name:            "foo",
+				Namespace:       api.NamespaceDefault,
+				ResourceVersion: "9",
+			},
+			Spec: extensions.IngressSpec{
+				Backend: &extensions.IngressBackend{
+					ServiceName: "default-backend",
+					ServicePort: util.IntOrString{Kind: util.IntstrInt, IntVal: 80},
+				},
+				Rules: []extensions.IngressRule{
+					{
+						Host: "foo.bar.com",
+						IngressRuleValue: extensions.IngressRuleValue{
+							HTTP: &extensions.HTTPIngressRuleValue{
+								Paths: []extensions.HTTPIngressPath{
+									{
+										Path:    "/foo",
+										Backend: defaultBackend,
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			Status: extensions.IngressStatus{
+				LoadBalancer: api.LoadBalancerStatus{
+					Ingress: []api.LoadBalancerIngress{
+						{IP: "127.0.0.1", Hostname: "foo.bar.com"},
+					},
+				},
+			},
+		}
+	}
+	oldValue := newValid()
+	newValue := newValid()
+	newValue.Status = extensions.IngressStatus{
+		LoadBalancer: api.LoadBalancerStatus{
+			Ingress: []api.LoadBalancerIngress{
+				{IP: "127.0.0.2", Hostname: "foo.com"},
+			},
+		},
+	}
+	invalidIP := newValid()
+	invalidIP.Status = extensions.IngressStatus{
+		LoadBalancer: api.LoadBalancerStatus{
+			Ingress: []api.LoadBalancerIngress{
+				{IP: "abcd", Hostname: "foo.com"},
+			},
+		},
+	}
+	invalidHostname := newValid()
+	invalidHostname.Status = extensions.IngressStatus{
+		LoadBalancer: api.LoadBalancerStatus{
+			Ingress: []api.LoadBalancerIngress{
+				{IP: "127.0.0.1", Hostname: "127.0.0.1"},
+			},
+		},
+	}
+
+	errs := ValidateIngressStatusUpdate(&newValue, &oldValue)
+	if len(errs) != 0 {
+		t.Errorf("Unexpected error %v", errs)
+	}
+
+	errorCases := map[string]extensions.Ingress{
+		"status.loadBalancer.ingress.ip: invalid value":       invalidIP,
+		"status.loadBalancer.ingress.hostname: invalid value": invalidHostname,
+	}
+	for k, v := range errorCases {
+		errs := ValidateIngressStatusUpdate(&v, &oldValue)
+		if len(errs) == 0 {
+			t.Errorf("expected failure for %s", k)
+		} else {
+			s := strings.Split(k, ":")
+			err := errs[0].(*errors.ValidationError)
+			if err.Field != s[0] || !strings.Contains(err.Error(), s[1]) {
+				t.Errorf("unexpected error: %v, expected: %s", errs[0], k)
+			}
+		}
+	}
+}
+
 func TestValidateClusterAutoscaler(t *testing.T) {
 	successCases := []extensions.ClusterAutoscaler{
 		{

pkg/master/master.go

@@ -1032,7 +1032,7 @@ func (m *Master) experimental(c *Config) *apiserver.APIGroupVersion {
 	daemonSetStorage, daemonSetStatusStorage := daemonetcd.NewREST(dbClient("daemonsets"))
 	deploymentStorage := deploymentetcd.NewStorage(dbClient("deployments"))
 	jobStorage, jobStatusStorage := jobetcd.NewREST(dbClient("jobs"))
-	ingressStorage := ingressetcd.NewREST(dbClient("ingress"))
+	ingressStorage, ingressStatusStorage := ingressetcd.NewREST(dbClient("ingress"))
 
 	thirdPartyControl := ThirdPartyController{
 		master: m,
@@ -1058,6 +1058,7 @@ func (m *Master) experimental(c *Config) *apiserver.APIGroupVersion {
 		strings.ToLower("jobs"):                            jobStorage,
 		strings.ToLower("jobs/status"):                     jobStatusStorage,
 		strings.ToLower("ingress"):                         ingressStorage,
+		strings.ToLower("ingress/status"):                  ingressStatusStorage,
 	}
 
 	expMeta := latest.GroupOrDie("extensions")

pkg/registry/ingress/etcd/etcd.go

@@ -38,7 +38,7 @@ type REST struct {
 }
 
 // NewREST returns a RESTStorage object that will work against replication controllers.
-func NewREST(s storage.Interface) *REST {
+func NewREST(s storage.Interface) (*REST, *StatusREST) {
 	store := &etcdgeneric.Etcd{
 		NewFunc: func() runtime.Object { return &extensions.Ingress{} },
 
@@ -72,6 +72,21 @@ func NewREST(s storage.Interface) *REST {
 
 		Storage: s,
 	}
+	statusStore := *store
+	statusStore.UpdateStrategy = ingress.StatusStrategy
+	return &REST{store}, &StatusREST{store: &statusStore}
+}
+
+// StatusREST implements the REST endpoint for changing the status of an ingress
+type StatusREST struct {
+	store *etcdgeneric.Etcd
+}
+
+func (r *StatusREST) New() runtime.Object {
+	return &extensions.Ingress{}
+}
 
-	return &REST{store}
+// Update alters the status subset of an object.
+func (r *StatusREST) Update(ctx api.Context, obj runtime.Object) (runtime.Object, bool, error) {
+	return r.store.Update(ctx, obj)
 }

pkg/registry/ingress/etcd/etcd_test.go

@@ -29,10 +29,10 @@ import (
 	"k8s.io/kubernetes/pkg/util"
 )
 
-func newStorage(t *testing.T) (*REST, *tools.FakeEtcdClient) {
+func newStorage(t *testing.T) (*REST, *StatusREST, *tools.FakeEtcdClient) {
 	etcdStorage, fakeClient := registrytest.NewEtcdStorage(t, "extensions")
-	ingressStorage := NewREST(etcdStorage)
-	return ingressStorage, fakeClient
+	ingressStorage, statusStorage := NewREST(etcdStorage)
+	return ingressStorage, statusStorage, fakeClient
 }
 
 var (
@@ -107,7 +107,7 @@ func validIngress() *extensions.Ingress {
 }
 
 func TestCreate(t *testing.T) {
-	storage, fakeClient := newStorage(t)
+	storage, _, fakeClient := newStorage(t)
 	test := registrytest.New(t, fakeClient, storage.Etcd)
 	ingress := validIngress()
 	noDefaultBackendAndRules := validIngress()
@@ -125,7 +125,7 @@ func TestCreate(t *testing.T) {
 }
 
 func TestUpdate(t *testing.T) {
-	storage, fakeClient := newStorage(t)
+	storage, _, fakeClient := newStorage(t)
 	test := registrytest.New(t, fakeClient, storage.Etcd)
 	test.TestUpdate(
 		// valid
@@ -161,25 +161,25 @@ func TestUpdate(t *testing.T) {
 }
 
 func TestDelete(t *testing.T) {
-	storage, fakeClient := newStorage(t)
+	storage, _, fakeClient := newStorage(t)
 	test := registrytest.New(t, fakeClient, storage.Etcd)
 	test.TestDelete(validIngress())
 }
 
 func TestGet(t *testing.T) {
-	storage, fakeClient := newStorage(t)
+	storage, _, fakeClient := newStorage(t)
 	test := registrytest.New(t, fakeClient, storage.Etcd)
 	test.TestGet(validIngress())
 }
 
 func TestList(t *testing.T) {
-	storage, fakeClient := newStorage(t)
+	storage, _, fakeClient := newStorage(t)
 	test := registrytest.New(t, fakeClient, storage.Etcd)
 	test.TestList(validIngress())
 }
 
 func TestWatch(t *testing.T) {
-	storage, fakeClient := newStorage(t)
+	storage, _, fakeClient := newStorage(t)
 	test := registrytest.New(t, fakeClient, storage.Etcd)
 	test.TestWatch(
 		validIngress(),
@@ -201,3 +201,5 @@ func TestWatch(t *testing.T) {
 		},
 	)
 }
+
+// TODO TestUpdateStatus

pkg/registry/ingress/strategy.go

@@ -47,6 +47,7 @@ func (ingressStrategy) NamespaceScoped() bool {
 // PrepareForCreate clears the status of an Ingress before creation.
 func (ingressStrategy) PrepareForCreate(obj runtime.Object) {
 	ingress := obj.(*extensions.Ingress)
+	// create cannot set status
 	ingress.Status = extensions.IngressStatus{}
 
 	ingress.Generation = 1
@@ -56,7 +57,8 @@ func (ingressStrategy) PrepareForCreate(obj runtime.Object) {
 func (ingressStrategy) PrepareForUpdate(obj, old runtime.Object) {
 	newIngress := obj.(*extensions.Ingress)
 	oldIngress := old.(*extensions.Ingress)
-	//TODO: Clear Ingress status once we have a sub-resource.
+	// Update is not allowed to set status
+	newIngress.Status = oldIngress.Status
 
 	// Any changes to the spec increment the generation number, any changes to the
 	// status should reflect the generation number of the corresponding object.
@@ -114,3 +116,22 @@ func MatchIngress(label labels.Selector, field fields.Selector) generic.Matcher
 		},
 	}
 }
+
+type ingressStatusStrategy struct {
+	ingressStrategy
+}
+
+var StatusStrategy = ingressStatusStrategy{Strategy}
+
+// PrepareForUpdate clears fields that are not allowed to be set by end users on update of status
+func (ingressStatusStrategy) PrepareForUpdate(obj, old runtime.Object) {
+	newIngress := obj.(*extensions.Ingress)
+	oldIngress := old.(*extensions.Ingress)
+	// status changes are not allowed to update spec
+	newIngress.Spec = oldIngress.Spec
+}
+
+// ValidateUpdate is the default update validation for an end user updating status
+func (ingressStatusStrategy) ValidateUpdate(ctx api.Context, obj, old runtime.Object) fielderrors.ValidationErrorList {
+	return validation.ValidateIngressStatusUpdate(obj.(*extensions.Ingress), old.(*extensions.Ingress))
+}