I need to get resource usage of Pods in a Kubernetes Cluster with kubernetes python client

Question

i have linux command to get the resource usage of the pods in particular namespace what is the equivalent python command for it

$ kubectl top pod
NAME                                CPU(cores)   MEMORY(bytes)   
nginx-deployment-7fd6966748-57mt5   0m           2Mi             
nginx-deployment-7fd6966748-jpbjl   0m           2Mi             
nginx-deployment-7fd6966748-snrx4   0m           2Mi

https://github.com/kubernetes-client/python/issues/435 , see if it works. — Tarun Khosla, Aug 07 '20 at 05:30

Pradeep Padmanaban C · Accepted Answer · 2021-09-24T09:29:15.190

5

Thanks for the input the following command worked fine

>>> from kubernetes import client, config
>>> 
>>> config.load_kube_config()
>>> api = client.CustomObjectsApi()
>>> resource = api.list_namespaced_custom_object(group="metrics.k8s.io",version="v1beta1", namespace="default", plural="pods")
>>> for pod in resource["items"]:
...    print(pod['containers'], "\n")
...

edited Sep 24 '21 at 09:29

answered Sep 18 '20 at 06:25

Pradeep Padmanaban C

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1

what is "api" object? how to import or create? – Nabin Sep 09 '21 at 04:18
1

`api` object here is [CustomObjectsApi](https://github.com/kubernetes-client/python/blob/master/kubernetes/docs/CustomObjectsApi.md), also see examples in this [issue](https://github.com/kubernetes-client/python/issues/435#issuecomment-563383704) – Marius Balčytis Sep 21 '21 at 12:44
Thanks @Nabin and Marius Balčytis i will update my answer – Pradeep Padmanaban C Sep 24 '21 at 09:28
@PradeepPadmanabanC, is there any way to use these kubernetes snippet inside a running pod? – Swapnil Masurekar May 17 '22 at 14:02
1

@SwapnilMasurekar yes refer this https://github.com/kubernetes-client/python/blob/master/examples/in_cluster_config.py – Pradeep Padmanaban C Jun 02 '22 at 06:02

score 3 · Answer 2 · answered Aug 07 '20 at 18:39

There is no single command.

Kubernetes metrics are exposed on metrics.k8s.io. You will have to write program to query the API and get results.

For example for nodes.

This API is made available under the /apis/metrics.k8s.io/ endpoint

kubectl get --raw "/apis/metrics.k8s.io/v1beta1/nodes" | jq for node metrics

score -1 · Answer 3 · answered Feb 18 '21 at 22:08

-1

You can run kubectl commands with python as well.

from subprocess import call
call('kubectl describe pod pod_name_here -n default', shell=True)

So you can filter anything with the Python Kubernetes library and also use kubectl commands to ease your work.

answered Feb 18 '21 at 22:08

Lucas Pires

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this is not using kubernetes-python-client – Pradeep Padmanaban C Mar 02 '21 at 08:32
This is just a workaround since Kubernetes does not support it, I do not see the reason for the -1. The Python ideia might help somebody in need. – Lucas Pires Jan 18 '22 at 20:26

I need to get resource usage of Pods in a Kubernetes Cluster with kubernetes python client

3 Answers3