Cannot run tests with Python 3.10

[Robert O'Brien]

When running Krkn with python 3.10, the following error occurs:

2022-05-27 11:18:16,924 [INFO] Starting kraken
2022-05-27 11:18:16,933 [INFO] Initializing client to talk to the Kubernetes cluster
Traceback (most recent call last):
  File "/home/robrien/repos/krkn/run_kraken.py", line 310, in <module>
    main(options.cfg)
  File "/home/robrien/repos/krkn/run_kraken.py", line 81, in main
    kubecli.find_kraken_node()
  File "/home/robrien/repos/krkn/kraken/kubernetes/client.py", line 406, in find_kraken_node
    pods = get_all_pods()
  File "/home/robrien/repos/krkn/kraken/kubernetes/client.py", line 175, in get_all_pods
    ret = cli.list_pod_for_all_namespaces(pretty=True)
  File "/home/robrien/.local/lib/python3.10/site-packages/kubernetes/client/api/core_v1_api.py", line 16864, in list_pod_for_all_namespaces
    return self.list_pod_for_all_namespaces_with_http_info(**kwargs)  # noqa: E501
  File "/home/robrien/.local/lib/python3.10/site-packages/kubernetes/client/api/core_v1_api.py", line 16967, in list_pod_for_all_namespaces_with_http_info
    return self.api_client.call_api(
  File "/home/robrien/.local/lib/python3.10/site-packages/kubernetes/client/api_client.py", line 348, in call_api
...
AttributeError: module 'collections' has no attribute 'Callable'

The error doesn't occur when using Python 3.8. It looks to be caused by the Kubernetes Python Client version: 18.20.0. If we try to use the latest Kubernetes version (v23.6.0), we get the following error:

ERROR: Cannot install -r requirements.txt (line 4) and kubernetes==23.6.0 because these package versions have conflicting dependencies.
The conflict is caused by:
The user requested kubernetes==23.6.0
powerfulseal 3.3.0 depends on kubernetes==18.20.0

This can be tested with the following minimal working example code snippet (once logged into a cluster):

import kubernetes


def test():
    kubernetes.config.load_kube_config()
    v1 = kubernetes.client.CoreV1Api()
    v1.list_pod_for_all_namespaces(pretty=True)


if __name__ == "__main__":
    test()

[Naga Ravi Chaitanya Elluri]

Hi @obrienrobert, thanks for reporting the issue!

About using the latest Kubernetes version (v23.6.0), we are in the process to trying to get the kubernetes client version in powerfulseal bumped up: powerfulseal/powerfulseal#358 before doing the same in Kraken.

We will take a look at fixing the code to work with python 3.10 while being backward compatible. Will keep you updated. Thanks.

[Naga Ravi Chaitanya Elluri]

Issues should be fixed and Kraken is supported with python 3.10. Please feel free to re-open if there are any issues. Thanks.