Oauth (google auth) crashes kube-ops-view

[iMartyn]

As the title suggests, if you auth with a cluster by oauth token from GApps, the users.user.auth-provider.config.id-token is a JWT auth token, but kube-ops-view attempts to use b64decode on it. This fails with an error like

Traceback (most recent call last):
  File "/kube_ops_view/update.py", line 42, in update_clusters
    for cluster in clusters:
  File "/kube_ops_view/cluster_discovery.py", line 146, in get_clusters
    kubernetes.config.load_kube_config(config_file, context=context['name'], client_configuration=config)
  File "/usr/lib/python3.6/site-packages/kubernetes/config/kube_config.py", line 476, in load_kube_config
    loader.load_and_set(client_configuration)
  File "/usr/lib/python3.6/site-packages/kubernetes/config/kube_config.py", line 354, in load_and_set
    self._load_authentication()
  File "/usr/lib/python3.6/site-packages/kubernetes/config/kube_config.py", line 185, in _load_authentication
    if self._load_oid_token():
  File "/usr/lib/python3.6/site-packages/kubernetes/config/kube_config.py", line 236, in _load_oid_token
    base64.b64decode(parts[1]).decode('utf-8')
  File "/usr/lib/python3.6/base64.py", line 87, in b64decode
    return binascii.a2b_base64(s)
binascii.Error: Incorrect padding

Which is understandable because JWT is multiple b64 strings concatenated with ., - and _ characters.

Obviously my cluster is accessible with kubectl but this completely breaks kube-ops-view's loading for all the clusters listed in my config.

If k-o-v must decode the values manually, can it at least not crash on this kind of expectation so that the other clusters in my config can be monitored.

[hjacobs]

Interesting case, the exception comes from the official Python Kubernetes client. Can you paste instructions on how to reproduce and some sanitized (with sensitive credentials replaced) ~/.kube/config file?

[iMartyn]

Sure, I'll grab them shortly. I was going to add them to the original report but didn't have time to sanitize.

[iMartyn]

fyi, looks like there's an upstream fix kubernetes-client/python-base#70 - Unfortunately when I generate a JWT token with sanitised data it works (because padding). Would be really nice if kube-ops-view would handle the exception better though. I managed to make a config with my real auth that loads (doesn't crash) with kube-ops-view but it doesn't actually auth, and it will not work with kubectl (which does JWT properly)