Warning Unhealthy 2m50s (x2 over 3m40s) kubelet, k8s-slave-master1 Readiness probe failed: Get http://192.168.32.158:10254/healthz: dial tcp 192.168.32.158:10254: connect: connection refused
Warning Unhealthy 2m17s (x6 over 3m27s) kubelet, k8s-slave-master1 Liveness probe failed: HTTP probe failed with statuscode: 500
Normal Killing 2m17s (x2 over 3m7s) kubelet, k8s-slave-master1 Container nginx-ingress-controller failed liveness probe, will be restarted

pod日志里报如下错误：
2019/12/26 12:42:08 [emerg] 42#42: bind() to 127.0.0.1:10256 failed (98: Address already in use)
W1226 12:42:10.284639 8 queue.go:130] requeuing &ObjectMeta{Name:sync status,GenerateName:,Namespace:,SelfLink:,UID:,ResourceVersion:,Generation:0,CreationTimestamp:0001-01-01 00:00:00 +0000 UTC,DeletionTimestamp:,DeletionGracePeriodSeconds:nil,Labels:map[string]string{},Annotations:map[string]string{},OwnerReferences:[]OwnerReference{},Finalizers:[],ClusterName:,ManagedFields:[]ManagedFieldsEntry{},}, err services “ingress-nginx” not found
W1226 12:42:10.484957 8 queue.go:130] requeuing &ObjectMeta{Name:sync status,GenerateName:,Namespace:,SelfLink:,UID:,ResourceVersion:,Generation:0,CreationTimestamp:0001-01-01 00:00:00 +0000 UTC,DeletionTimestamp:,DeletionGracePeriodSeconds:nil,Labels:map[string]string{},Annotations:map[string]string{},OwnerReferences:[]OwnerReference{},Finalizers:[],ClusterName:,ManagedFields:[]ManagedFieldsEntry{},}, err services “ingress-nginx” not found
2019/12/26 12:42:08 [emerg] 42#42: still could not bind()

在pod所在node节点上看，10256端口的确是被占了，如下：
[Unauthorized System] root@k8s:/# netstat -lntp|grep 10256
tcp6 0 0 :::10256 :::* LISTEN 9679/kube-proxy