Merge pull request #1042 from aledbf/custom-status

Add function to allow custom values in Ingress status

controllers/nginx/pkg/cmd/controller/nginx.go

@@ -35,6 +35,7 @@ import (
 
 	proxyproto "github.com/armon/go-proxyproto"
 	api_v1 "k8s.io/api/core/v1"
+	extensions "k8s.io/api/extensions/v1beta1"
 
 	"k8s.io/ingress/controllers/nginx/pkg/config"
 	ngx_template "k8s.io/ingress/controllers/nginx/pkg/template"
@@ -373,6 +374,11 @@ func (n *NGINXController) SetListers(lister ingress.StoreLister) {
 	n.storeLister = lister
 }
 
+// UpdateIngressStatus custom Ingress status update
+func (n *NGINXController) UpdateIngressStatus(*extensions.Ingress) []api_v1.LoadBalancerIngress {
+	return nil
+}
+
 // OnUpdate is called by syncQueue in https://github.com/aledbf/ingress-controller/blob/master/pkg/ingress/controller/controller.go#L82
 // periodically to keep the configuration in sync.
 //

core/pkg/ingress/controller/controller.go

@@ -299,6 +299,7 @@ func newIngressController(config *Configuration) *GenericController {
 			IngressClass:           config.IngressClass,
 			DefaultIngressClass:    config.DefaultIngressClass,
 			UpdateStatusOnShutdown: config.UpdateStatusOnShutdown,
+			CustomIngressStatus:    ic.cfg.Backend.UpdateIngressStatus,
 		})
 	} else {
 		glog.Warning("Update of ingress status is disabled (flag --update-status=false was specified)")

core/pkg/ingress/status/status.go

@@ -66,6 +66,9 @@ type Config struct {
 
 	DefaultIngressClass string
 	IngressClass        string
+
+	// CustomIngressStatus allows to set custom values in Ingress status
+	CustomIngressStatus func(*extensions.Ingress) []v1.LoadBalancerIngress
 }
 
 // statusSync keeps the status IP in each Ingress rule updated executing a periodic check
@@ -315,7 +318,10 @@ func sliceToStatus(endpoints []string) []v1.LoadBalancerIngress {
 	return lbi
 }
 
-func (s *statusSync) updateStatus(newIPs []v1.LoadBalancerIngress) {
+// updateStatus changes the status information of Ingress rules
+// If the backend function CustomIngressStatus returns a value different
+// of nil then it uses the returned value or the newIngressPoint values
+func (s *statusSync) updateStatus(newIngressPoint []v1.LoadBalancerIngress) {
 	ings := s.IngressLister.List()
 	var wg sync.WaitGroup
 	wg.Add(len(ings))
@@ -336,15 +342,21 @@ func (s *statusSync) updateStatus(newIPs []v1.LoadBalancerIngress) {
 				return
 			}
 
+			addrs := newIngressPoint
+			ca := s.CustomIngressStatus(currIng)
+			if ca != nil {
+				addrs = ca
+			}
+
 			curIPs := currIng.Status.LoadBalancer.Ingress
 			sort.Sort(loadBalancerIngressByIP(curIPs))
-			if ingressSliceEqual(newIPs, curIPs) {
+			if ingressSliceEqual(addrs, curIPs) {
 				glog.V(3).Infof("skipping update of Ingress %v/%v (no change)", currIng.Namespace, currIng.Name)
 				return
 			}
 
-			glog.Infof("updating Ingress %v/%v status to %v", currIng.Namespace, currIng.Name, newIPs)
-			currIng.Status.LoadBalancer.Ingress = newIPs
+			glog.Infof("updating Ingress %v/%v status to %v", currIng.Namespace, currIng.Name, addrs)
+			currIng.Status.LoadBalancer.Ingress = addrs
 			_, err = ingClient.UpdateStatus(currIng)
 			if err != nil {
 				glog.Warningf("error updating ingress rule: %v", err)

core/pkg/ingress/status/status_test.go

@@ -251,6 +251,9 @@ func buildStatusSync() statusSync {
 			Client:         buildSimpleClientSet(),
 			PublishService: api_v1.NamespaceDefault + "/" + "foo",
 			IngressLister:  buildIngressListener(),
+			CustomIngressStatus: func(*extensions.Ingress) []api_v1.LoadBalancerIngress {
+				return nil
+			},
 		},
 	}
 }
@@ -266,6 +269,9 @@ func TestStatusActions(t *testing.T) {
 		DefaultIngressClass:    "nginx",
 		IngressClass:           "",
 		UpdateStatusOnShutdown: true,
+		CustomIngressStatus: func(*extensions.Ingress) []api_v1.LoadBalancerIngress {
+			return nil
+		},
 	}
 	// create object
 	fkSync := NewStatusSyncer(c)

core/pkg/ingress/types.go

@@ -22,6 +22,7 @@ import (
 	"github.com/spf13/pflag"
 
 	api "k8s.io/api/core/v1"
+	extensions "k8s.io/api/extensions/v1beta1"
 	"k8s.io/apimachinery/pkg/util/intstr"
 	"k8s.io/apiserver/pkg/server/healthz"
 
@@ -92,6 +93,10 @@ type Controller interface {
 	OverrideFlags(*pflag.FlagSet)
 	// DefaultIngressClass just return the default ingress class
 	DefaultIngressClass() string
+	// UpdateIngressStatus custom callback used to update the status in an Ingress rule
+	// This allows custom implementations
+	// If the function returns nil the standard functions will be executed.
+	UpdateIngressStatus(*extensions.Ingress) []api.LoadBalancerIngress
 }
 
 // StoreLister returns the configured stores for ingresses, services,

examples/custom-controller/server.go

@@ -25,6 +25,7 @@ import (
 	"github.com/spf13/pflag"
 
 	api "k8s.io/api/core/v1"
+	extensions "k8s.io/api/extensions/v1beta1"
 
 	nginxconfig "k8s.io/ingress/controllers/nginx/pkg/config"
 	"k8s.io/ingress/core/pkg/ingress"
@@ -105,3 +106,7 @@ func (n DummyController) SetListers(lister ingress.StoreLister) {
 func (n DummyController) DefaultIngressClass() string {
 	return "dummy"
 }
+
+func (n DummyController) UpdateIngressStatus(*extensions.Ingress) []api.LoadBalancerIngress {
+	return nil
+}