# K8S cluster, metrics deployment error **URL:** https://discuss.kubernetes.io/t/k8s-cluster-metrics-deployment-error/30787 **Category:** General Discussions **Tags:** development, network **Created:** [December 12, 2024, 5:50am UTC](https://discuss.kubernetes.io/t/k8s-cluster-metrics-deployment-error/30787 "2024-12-12T05:50:53Z") **Posts on this page:** 1 **Page:** 1
### Author: ![zp\_job](https://avatars.discourse-cdn.com/v4/letter/z/8e7dd6/32.png) [@zp\_job](https://discuss.kubernetes.io/u/zp_job) #### Post date: [December 12, 2024, 5:50am UTC](https://discuss.kubernetes.io/t/k8s-cluster-metrics-deployment-error/30787/1 "2024-12-12T05:50:53Z")
Asking for help? Comment out what you need so we can get more information to help you! ### Cluster information: Kubernetes version:1.21 Cloud being used: (put bare-metal if not on a public cloud) Installation method:binary Host OS: centos7 CNI and version:calico CRI and version: docker You can format your yaml by highlighting it and pressing Ctrl-Shift-C, it will make your output easier to read. However, when executing kubectl top pods an error occurs: W1212 13:09:35.004801 8720 top\_pod.go:140] Using json format to get metrics. Next release will switch to protocol-buffers, switch early by passing --use-protocol-buffers flag Error from server (ServiceUnavailable): the server is currently unable to handle the request (get [pods.metrics.k8s.io](http://pods.metrics.k8s.io)) check apiserver，Failed to check availability upon discovery kubectl get apiservices NAME SERVICE AVAILABLE AGE [v1beta1.metrics.k8s.io](http://v1beta1.metrics.k8s.io) kube-system/metrics-server False (FailedDiscoveryCheck) 12d check describe pod，metrics-server，apiservice [v1.certificates.k8s.io](http://v1.certificates.k8s.io),no errors ping 10.96.165.35 can be connect,but telnet 10.96.165.35 443,can not connect; Only in work pod of which metrics pod in it executing telnet 10.96.165.35 443 able connect，how to fix this error，so in master node can use kubectl top pods command