JEG 3.2.3 on K3s v1.28.5 unable to start kernels. Same actions with helm chart 3.2.2 pyspark kubernetes work.

[paf91]

Description

Whenever I start kernel based on kubernetes I'm getting this error on version 3.2.3:

Error Starting Kernel
HTTP 500: Internal Server Error (Error from Gateway: [Error occurred creating role binding for namespace 'guest-fab3e59b-edbb-4e1d-912e-087b1798425b': module 'kubernetes.client' has no attribute 'V1Subject'] Error occurred creating role binding for namespace 'guest-fab3e59b-edbb-4e1d-912e-087b1798425b': module 'kubernetes.client' has no attribute 'V1Subject'. Ensure gateway url is valid and the Gateway instance is running.)

Reproduce

values.yaml:

service:
  type: "LoadBalancer"
  # Master public IP on which to expose EG.
  k8sMasterPublicIP: '<redacted, private ip like 10.x.x.x>'
  ports:
    - name: "http"
      port: 8888
      targetPort: 8888
    - name: "http-response"
      port: 8877
      targetPort: 8877
ingress:
  enabled: false
kernel:
  shareGatewayNamespace: false
  allowedKernels:
    - r_kubernetes
    - python_kubernetes
    - python_tf_kubernetes
    - python_tf_gpu_kubernetes
    - scala_kubernetes
    - spark_r_kubernetes
    - spark_python_kubernetes
    - spark_scala_kubernetes
    - spark_python_operator
    - python3
  defaultKernelName: python_kubernetes
kip:
  enabled: true
  serviceAccountName: 'kernel-image-puller-sa'
  criSocket: /run/containerd/containerd.sock

helm upgrade --install enterprise-gateway https://github.com/jupyter-server/enterprise_gateway/releases/download/v3.2.3/jupyter_enterprise_gateway_helm-3.2.3.tar.gz --namespace enterprise-gateway -f ~/jupyter/gateway/values-balancer.yaml

kubectl get pods -n enterprise-gateway:

Try to run:

`curl -X POST -i 'http://<redacted_private_ip>:8888/api/kernels' --data '{ "name": "spark_python_kubernetes", "env": { "KERNEL_USERNAME": "jovyan" }}'`

Response:

{"reason": "Error occurred creating role binding for namespace 'jovyan-99878812-28c5-49ad-8cbc-cb81713e7ba3': module 'kubernetes.client' has no attribute 'V1Subject'", "message": ""}

Enterprise gateway logs:

kubectl logs -n enterprise-gateway enterprise-gateway-cfbb54797-7dph8

[D 2024-04-02 23:17:01.296 EnterpriseGatewayApp] RemoteMappingKernelManager.start_kernel: spark_python_kubernetes, kernel_username: jovyan
[D 2024-04-02 23:17:01.298 EnterpriseGatewayApp] Instantiating kernel 'Spark - Python (Kubernetes Mode)' with process proxy: enterprise_gateway.services.processproxies.k8s.KubernetesProcessProxy
[D 2024-04-02 23:17:01.299 EnterpriseGatewayApp] Starting kernel (async): ['/usr/local/share/jupyter/kernels/spark_python_kubernetes/bin/run.sh', '--RemoteProcessProxy.kernel-id', '<redacted>', '--RemoteProcessProxy.port-range', '0..0', '--RemoteProcessProxy.response-address', '<redacted>:8877', '--RemoteProcessProxy.public-key', '<redacted>', '--RemoteProcessProxy.spark-context-initialization-mode', 'lazy']
[D 2024-04-02 23:17:01.299 EnterpriseGatewayApp] Launching kernel: 'Spark - Python (Kubernetes Mode)' with command: ['/usr/local/share/jupyter/kernels/spark_python_kubernetes/bin/run.sh', '--RemoteProcessProxy.kernel-id', '<redacted>', '--RemoteProcessProxy.port-range', '0..0', '--RemoteProcessProxy.response-address', '<redacted>:8877', '--RemoteProcessProxy.public-key', '<redacted>', '--RemoteProcessProxy.spark-context-initialization-mode', 'lazy']
[I 2024-04-02 23:17:01.336 EnterpriseGatewayApp] Created kernel namespace: jovyan-99878812-28c5-49ad-8cbc-cb81713e7ba3
[W 2024-04-02 23:17:01.367 EnterpriseGatewayApp] Deleted kernel namespace: jovyan-99878812-28c5-49ad-8cbc-cb81713e7ba3
[E 2024-04-02 23:17:01.367 EnterpriseGatewayApp] Error occurred creating role binding for namespace 'jovyan-99878812-28c5-49ad-8cbc-cb81713e7ba3': module 'kubernetes.client' has no attribute 'V1Subject'
[E 240402 23:17:01 web:2271] 500 POST /api/kernels (<redacted>) 83.95ms

Expected behavior

Kernel starts

Context

JEG 3.2.3 on K3s v1.28.5

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[paf91]

Okay so the culprit is the updated kubernetes pip version. EG 3.2.2 has 26.1.0 kubernetes python ver, EG 3.2.3 has 29.0.0

>>> import kubernetes; print(kubernetes.__version__)
29.0.0

I hope will find time to try to fix this

>>> name='spark'
>>> namespace='default'
>>> from kubernetes import client
>>> client.V1Subject(
...             api_group="", kind="ServiceAccount", name=service_account_name, namespace=namespace
...         )
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'kubernetes.client' has no attribute 'V1Subject'. Did you mean: 'RbacV1Subject'?
>>>

So this code cant execute:

https://github.com/jupyter-server/enterprise_gateway/blame/d01e84a2457d44d14bd6bd3335307b9d0e3b483d/enterprise_gateway/services/processproxies/k8s.py#L352

[lresende]

Could this probably be related to new Kubernetes Client version where these have changed?

[paf91]

@lresende see my reply above

[lresende]

So, we should cap the kubernetes client for now I would say

[merqri]

@paf91
Greetings, I think the easiest and fastest way is to build a new image as I mentioned in #1382 (comment).