三台主节点分别执行

kubectl cluster-info

又俩台

kubectl cluster-info
Kubernetes master is running at http://localhost:8080
CoreDNS is running at http://localhost:8080/api/v1/namespaces/kube-system/services/coredns:dns/proxy
Heapster is running at http://localhost:8080/api/v1/namespaces/kube-system/services/heapster/proxy
Grafana is running at http://localhost:8080/api/v1/namespaces/kube-system/services/monitoring-grafana/proxy
InfluxDB is running at http://localhost:8080/api/v1/namespaces/kube-system/services/monitoring-influxdb:http/proxy

一台

kubectl cluster-info
Kubernetes master is running at https://192.168.76.250:6443
CoreDNS is running at https://192.168.76.250:6443/api/v1/namespaces/kube-system/services/coredns:dns/proxy
Heapster is running at https://192.168.76.250:6443/api/v1/namespaces/kube-system/services/heapster/proxy
Grafana is running at https://192.168.76.250:6443/api/v1/namespaces/kube-system/services/monitoring-grafana/proxy
InfluxDB is running at https://192.168.76.250:6443/api/v1/namespaces/kube-system/services/monitoring-influxdb:http/proxy

解决办法

在有问题的俩台机器上修改

vim /root/.kube/config
current-context: ""
改为
current-context: kubernetes