如何在Kubernetes中获取Pod的资源使用情况? [英] How to get the resource usage of a pod in Kubernetes?

问题描述

如何通过命令行获取Kubernetes上每个Pod的实际资源使用情况(而非资源请求)? Heapster已过时. 同时，Metrics-server仍然不支持kubectl top pod.

How can we get the real resource usage (not resource requests) of each pod on Kubernetes by command line? Heapster is deprecated. Meanwhile, Metrics-server still does not support kubectl top pod.

1. 堆-

1. Heapster -

我使用以下命令部署了Heapster

I deployed Heapster using the following command

$ 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

使用kubectl top时，遇到以下错误.

When I used kubectl top, I encountered the following errors.

$ 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:

metrics-server:

metrics-server不支持kubectl top 资源指标API

metrics-server has not supported kubectl top Resource Metrics API

如果有人已经解决了相同的问题，请帮助我. 谢谢.

If anyone already solved the same problem, please help me. Thanks.

推荐答案

服务器错误(ServiceUnavailable):服务器当前无法处理请求(获取服务http:heapster:)

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

这听起来像是只是部署了stackster部署而忘记为heapster安装Service了；我希望这能使您克服那个错误，但不知道它是否真的会导致kubectl top pods开始工作:

It sounds like the heapster deployment just forgot to install the Service for heapster; I would expect this would get you past that error, but unknown whether it would actually cause kubectl top pods to start to work:

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

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