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
.
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
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:)
metrics-server:
metrics-server has not supported kubectl top
Resource Metrics API
If anyone already solved the same problem, please help me. Thanks.
Error from server (ServiceUnavailable): the server is currently unable to handle the request (get services http:heapster:)
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