kubernetes - 如何在Kubernetes中获取Pod的资源使用情况？

Question

我们如何通过命令行获取 Kubernetes 上每个 Pod 的真实资源使用情况(而不是资源请求)？
Heapster 已被弃用。
同时，Metrics-server 仍然不支持 kubectl top pod .

Heapster -

我使用以下命令部署了 Heapster

$ heapster/deploy/kube.sh start
kubectl get pods --all-namespaces
NAMESPACE     NAME                                                           READY     STATUS    RESTARTS   AGE
kube-system   calico-node-hlcbl                                              2/2       Running   0          39m
kube-system   calico-node-m8jl2                                              2/2       Running   0          35m
kube-system   coredns-78fcdf6894-bl94w                                       1/1       Running   0          39m
kube-system   coredns-78fcdf6894-fwx95                                       1/1       Running   0          39m
kube-system   etcd-ctl.kube.yarnrm-pg0.utah.cloudlab.us                      1/1       Running   0          39m
kube-system   heapster-84c9bc48c4-qzt8x                                      1/1       Running   0          15s
kube-system   kube-apiserver-ctl.kube.yarnrm-pg0.utah.cloudlab.us            1/1       Running   0          39m
kube-system   kube-controller-manager-ctl.kube.yarnrm-pg0.utah.cloudlab.us   1/1       Running   0          38m
kube-system   kube-proxy-nj9f8                                               1/1       Running   0          35m
kube-system   kube-proxy-zvr2b                                               1/1       Running   0          39m
kube-system   kube-scheduler-ctl.kube.yarnrm-pg0.utah.cloudlab.us            1/1       Running   0          39m
kube-system   monitoring-grafana-555545f477-jldmz                            1/1       Running   0          15s
kube-system   monitoring-influxdb-848b9b66f6-k2k4f                           1/1       Running   0          15s

当我使用 kubectl top ，我遇到了以下错误。

$ kubectl top pods
Error from server (ServiceUnavailable): the server is currently unable to handle the request (get services http:heapster:)
$ kubectl top nodes
Error from server (ServiceUnavailable): the server is currently unable to handle the request (get services http:heapster:)

指标服务器:

指标服务器不支持 kubectl top Resource Metrics API

如果有人已经解决了同样的问题，请帮助我。
谢谢。

Answer 1

Error from server (ServiceUnavailable): the server is currently unable to handle the request (get services http:heapster:)

听起来好像 heapster 部署忘记安装 Service为 heapster ;我希望这会让你克服那个错误，但不知道它是否真的会导致 kubectl top pods开始工作:

kubectl create -f /dev/stdin <<SVC
apiVersion: v1
kind: Service
metadata:
  name: heapster
  namespace: kube-system
spec:
  selector:
    whatever-label: is-on-heapster-pods
  ports:
  - name: http
    port: 80
    targetPort: whatever-is-heapster-is-listening-on
SVC