我确实尝试过kubectl 描述节点masterNodeName，它给出的输出为：
Name: ip-172-28-3-142
Roles: master
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/os=linux
kubernetes.io/arch=amd64
kubernetes.io/hostname=ip-172-28-3-142
kubernetes.io/os=linux
node-role.kubernetes.io/master=
Annotations: kubeadm.alpha.kubernetes.io/cri-socket: /var/run/dockershim.sock
node.alpha.kubernetes.io/ttl: 0
projectcalico.org/IPv4Address: 172.28.3.142/20
projectcalico.org/IPv4IPIPTunnelAddr: 192.163.119.24
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Thu, 06 Jun 2019 04:10:28 +0000
Taints: <none>
Unschedulable: false
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
NetworkUnavailable False Sat, 24 Aug 2019 12:10:03 +0000 Sat, 24 Aug 2019 12:10:03 +0000 CalicoIsUp Calico is running on this node
MemoryPressure False Tue, 27 Aug 2019 14:08:19 +0000 Tue, 11 …