k8s dashboard: Metric client health check failed

Question

我执行如下命令安装 k8s dashboard:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.4/aio/deploy/recommended.yaml 

之后发现 dashboard 的 pod 有报错：

$ kubectl -n kubernetes-dashboard logs -f kubernetes-dashboard-665f4c5ff-wcrj9
2020/09/12 04:19:10 Metric client health check failed: an error on the server ("unknown") has prevented the request from succeeding (get services dashboard-metrics-scraper). Retrying in 30 seconds.
2020/09/12 04:19:43 Metric client health check failed: an error on the server ("unknown") has prevented the request from succeeding (get services dashboard-metrics-scraper). Retrying in 30 seconds.
2020/09/12 04:20:17 Metric client health check failed: an error on the server ("unknown") has prevented the request from succeeding (get services dashboard-metrics-scraper). Retrying in 30 seconds.
2020/09/12 04:20:50 Metric client health check failed: an error on the server ("unknown") has prevented the request from succeeding (get services dashboard-metrics-scraper). Retrying in 30 seconds.
2020/09/12 04:21:23 Metric client health check failed: an error on the server ("unknown") has prevented the request from succeeding (get services dashboard-metrics-scraper). Retrying in 30 seconds.
2020/09/12 04:21:56 Metric client health check failed: an error on the server ("unknown") has prevented the request from succeeding (get services dashboard-metrics-scraper). Retrying in 30 seconds.
2020/09/12 04:22:29 Metric client health check failed: an error on the server ("unknown") has prevented the request from succeeding (get services dashboard-metrics-scraper). Retrying in 30 seconds.

kubeadm 版本: 1.19
kubectl 版本: 1.19

有人知道这是什么问题吗？

Answer 1

报错很清楚告诉你kubernetes-dashboard 去访问dashboard-metrics-scraper的service时访问失败了，这种清楚先检查你的dashboard-metrics-scraper这个组件安装是否正常，看下的你的pod和service是否正常通信