backward compatibility for k8s version < 1.14
backward compatibility for k8s version < 1.14

canhnt/ingress,kubernetes/ingress-nginx,aledbf/ingress-nginx,caicloud/ingress,kubernetes/ingress-nginx,kubernetes/ingress-nginx,kubernetes/ingress-nginx,aledbf/ingress-nginx,canhnt/ingress,aledbf/ingress-nginx,caicloud/ingress,caicloud/ingress,kubernetes/ingress-nginx,canhnt/ingress,canhnt/ingress,aledbf/ingress-nginx,caicloud/ingress