metallb: selfLink is missing

I am getting the following error:

E1214 23:18:43.475271       1 event.go:296] Could not construct reference to: '&v1.Service{TypeMeta:v1.TypeMeta{Kind:"", APIVersion:""}, ObjectMeta:v1.ObjectMeta{Name:"ingress-nginx-controller-ipv6", GenerateName:"", Namespace:"default", SelfLink:"", UID:"7ccdee5d-3caf-4e36-8d54-75482263c85d", ResourceVersion:"119477090", Generation:0, CreationTimestamp:v1.Time{Time:time.Time{wall:0x0, ext:63743503894, loc:(*time.Location)(0x1a6e740)}}, DeletionTimestamp:(*v1.Time)(nil), DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string(nil), Annotations:map[string]string{"kubectl.kubernetes.io/last-applied-configuration":"{\"apiVersion\":\"v1\",\"kind\":\"Service\",\"metadata\":{\"annotations\":{},\"name\":\"ingress-nginx-controller-ipv6\",\"namespace\":\"default\"},\"spec\":{\"externalIPs\":[\"2001:44b8:4112:8a03::13\"],\"ipFamilies\":[\"IPv6\"],\"ipFamilyPolicy\":\"SingleStack\",\"ports\":[{\"name\":\"http\",\"port\":80,\"protocol\":\"TCP\",\"targetPort\":\"http\"},{\"name\":\"https\",\"port\":443,\"protocol\":\"TCP\",\"targetPort\":\"https\"}],\"selector\":{\"app.kubernetes.io/component\":\"controller\",\"app.kubernetes.io/instance\":\"ingress-nginx\",\"app.kubernetes.io/name\":\"ingress-nginx\"},\"type\":\"ClusterIP\"}}\n"}, OwnerReferences:[]v1.OwnerReference(nil), Initializers:(*v1.Initializers)(nil), Finalizers:[]string(nil), ClusterName:"", ManagedFields:[]v1.ManagedFieldsEntry{v1.ManagedFieldsEntry{Manager:"kubectl-client-side-apply", Operation:"Update", APIVersion:"v1", Time:(*v1.Time)(0xc0003756c0), Fields:(*v1.Fields)(nil)}, v1.ManagedFieldsEntry{Manager:"kubectl-edit", Operation:"Update", APIVersion:"v1", Time:(*v1.Time)(0xc0003756e0), Fields:(*v1.Fields)(nil)}}}, Spec:v1.ServiceSpec{Ports:[]v1.ServicePort{v1.ServicePort{Name:"http", Protocol:"TCP", Port:80, TargetPort:intstr.IntOrString{Type:1, IntVal:0, StrVal:"http"}, NodePort:31069}, v1.ServicePort{Name:"https", Protocol:"TCP", Port:443, TargetPort:intstr.IntOrString{Type:1, IntVal:0, StrVal:"https"}, NodePort:32066}}, Selector:map[string]string{"app.kubernetes.io/component":"controller", "app.kubernetes.io/instance":"ingress-nginx", "app.kubernetes.io/name":"ingress-nginx"}, ClusterIP:"fc01::5e88", Type:"LoadBalancer", ExternalIPs:[]string{"2001:44b8:4112:8a03::13"}, SessionAffinity:"None", LoadBalancerIP:"", LoadBalancerSourceRanges:[]string(nil), ExternalName:"", ExternalTrafficPolicy:"Cluster", HealthCheckNodePort:0, PublishNotReadyAddresses:false, SessionAffinityConfig:(*v1.SessionAffinityConfig)(nil)}, Status:v1.ServiceStatus{LoadBalancer:v1.LoadBalancerStatus{Ingress:[]v1.LoadBalancerIngress(nil)}}}' due to: 'selfLink was empty, can't make reference'. Will not report event: 'Normal' 'IPAllocated' 'Assigned IP "2001:44b8:4112:8a03::"'

I believe the key error here is “selfLink was empty, can’t make reference”.

But selfLink is deprecated in Kubernetes 0.20.0.

Relevant references:

• https://github.com/kubernetes/enhancements/issues/1164
• https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner/issues/25 (appears to have a workaround)