Error when trying to retrieve api versions

[joeblackwaslike]

I seem to be getting a ValueError exception trying to list apis versions using client version: 4.0.0b1 on a kubernetes: 1.7.8 cluster.

I'm simply following the example in example3.py

>>> client.CoreApi().get_api_versions()
{'api_version': None,
 'kind': 'APIVersions',
 'server_address_by_client_cid_rs': [{'client_cidr': '0.0.0.0/0',
                                      'server_address': 'xxx.xxx.xxx.xxx:xxxx'}],
 'versions': ['v1']}

works fine, but the next one fails

>>> client.ApisApi().get_api_versions()
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-27-6c0283bdc603> in <module>()
----> 1 client.ApisApi().get_api_versions()

~/github/telephoneorg/client-python/kubernetes/client/apis/apis_api.py in get_api_versions(self, **kwargs)
     53             return self.get_api_versions_with_http_info(**kwargs)
     54         else:
---> 55             (data) = self.get_api_versions_with_http_info(**kwargs)
     56             return data
     57

~/github/telephoneorg/client-python/kubernetes/client/apis/apis_api.py in get_api_versions_with_http_info(self, **kwargs)
    122                                         _preload_content=params.get('_preload_content', True),
    123                                         _request_timeout=params.get('_request_timeout'),
--> 124                                         collection_formats=collection_formats)

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in call_api(self, resource_path, method, path_params, query_params, header_params, body, post_params, files, response_type, auth_settings, async, _return_http_data_only, collection_formats, _preload_content, _request_timeout)
    319                                    body, post_params, files,
    320                                    response_type, auth_settings,
--> 321                                    _return_http_data_only, collection_formats, _preload_content, _request_timeout)
    322         else:
    323             thread = self.pool.apply_async(self.__call_api, (resource_path, method,

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in __call_api(self, resource_path, method, path_params, query_params, header_params, body, post_params, files, response_type, auth_settings, _return_http_data_only, collection_formats, _preload_content, _request_timeout)
    161             # deserialize response data
    162             if response_type:
--> 163                 return_data = self.deserialize(response_data, response_type)
    164             else:
    165                 return_data = None

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in deserialize(self, response, response_type)
    234             data = response.data
    235
--> 236         return self.__deserialize(data, response_type)
    237
    238     def __deserialize(self, data, klass):

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in __deserialize(self, data, klass)
    274             return self.__deserialize_datatime(data)
    275         else:
--> 276             return self.__deserialize_model(data, klass)
    277
    278     def call_api(self, resource_path, method,

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in __deserialize_model(self, data, klass)
    618                    and isinstance(data, (list, dict)):
    619                     value = data[klass.attribute_map[attr]]
--> 620                     kwargs[attr] = self.__deserialize(value, attr_type)
    621
    622         instance = klass(**kwargs)

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in __deserialize(self, data, klass)
    252                 sub_kls = re.match('list\[(.*)\]', klass).group(1)
    253                 return [self.__deserialize(sub_data, sub_kls)
--> 254                         for sub_data in data]
    255
    256             if klass.startswith('dict('):

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in <listcomp>(.0)
    252                 sub_kls = re.match('list\[(.*)\]', klass).group(1)
    253                 return [self.__deserialize(sub_data, sub_kls)
--> 254                         for sub_data in data]
    255
    256             if klass.startswith('dict('):

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in __deserialize(self, data, klass)
    274             return self.__deserialize_datatime(data)
    275         else:
--> 276             return self.__deserialize_model(data, klass)
    277
    278     def call_api(self, resource_path, method,

~/github/telephoneorg/client-python/kubernetes/client/api_client.py in __deserialize_model(self, data, klass)
    620                     kwargs[attr] = self.__deserialize(value, attr_type)
    621
--> 622         instance = klass(**kwargs)
    623
    624         if hasattr(instance, 'get_real_child_model'):

~/github/telephoneorg/client-python/kubernetes/client/models/v1_api_group.py in __init__(self, api_version, kind, name, preferred_version, server_address_by_client_cid_rs, versions)
     69         if preferred_version is not None:
     70           self.preferred_version = preferred_version
---> 71         self.server_address_by_client_cid_rs = server_address_by_client_cid_rs
     72         self.versions = versions
     73

~/github/telephoneorg/client-python/kubernetes/client/models/v1_api_group.py in server_address_by_client_cid_rs(self, server_address_by_client_cid_rs)
    187         """
    188         if server_address_by_client_cid_rs is None:
--> 189             raise ValueError("Invalid value for `server_address_by_client_cid_rs`, must not be `None`")
    190
    191         self._server_address_by_client_cid_rs = server_address_by_client_cid_rs

ValueError: Invalid value for `server_address_by_client_cid_rs`, must not be `None`

The value itself seems pretty foreign so I attempt the same kind of call using kubectl with --v=8 and check the output

I1213 20:33:31.845871   49956 loader.go:357] Config loaded from file /Users/joeblack/.kube/config
I1213 20:33:31.849207   49956 round_trippers.go:383] GET https://[snip]:6443/api
I1213 20:33:31.849241   49956 round_trippers.go:390] Request Headers:
I1213 20:33:31.849248   49956 round_trippers.go:393]     Accept: application/json, */*
I1213 20:33:31.849253   49956 round_trippers.go:393]     User-Agent: kubectl/v1.7.8 (darwin/amd64) kubernetes/bc6162c
I1213 20:33:31.982519   49956 round_trippers.go:408] Response Status: 200 OK in 133 milliseconds
I1213 20:33:31.982553   49956 round_trippers.go:411] Response Headers:
I1213 20:33:31.982560   49956 round_trippers.go:414]     Date: Thu, 14 Dec 2017 01:33:32 GMT
I1213 20:33:31.982566   49956 round_trippers.go:414]     Content-Type: application/json
I1213 20:33:31.982571   49956 round_trippers.go:414]     Content-Length: 138
I1213 20:33:31.982604   49956 request.go:991] Response Body: {"kind":"APIVersions","versions":["v1"],"serverAddressByClientCIDRs":[{"clientCIDR":"0.0.0.0/0","serverAddress":"[snip]:16443"}]}
I1213 20:33:31.983248   49956 round_trippers.go:383] GET https://[snip]:6443/apis
I1213 20:33:31.983266   49956 round_trippers.go:390] Request Headers:
I1213 20:33:31.983274   49956 round_trippers.go:393]     Accept: application/json, */*
I1213 20:33:31.983281   49956 round_trippers.go:393]     User-Agent: kubectl/v1.7.8 (darwin/amd64) kubernetes/bc6162c
I1213 20:33:31.995793   49956 round_trippers.go:408] Response Status: 200 OK in 12 milliseconds
I1213 20:33:31.995813   49956 round_trippers.go:411] Response Headers:
I1213 20:33:31.995819   49956 round_trippers.go:414]     Content-Type: application/json
I1213 20:33:31.995823   49956 round_trippers.go:414]     Content-Length: 3473
I1213 20:33:31.995828   49956 round_trippers.go:414]     Date: Thu, 14 Dec 2017 01:33:32 GMT
I1213 20:33:31.998354   49956 request.go:991] Response Body: {"kind":"APIGroupList","apiVersion":"v1","groups":[{"name":"apiregistration.k8s.io","versions":[{"groupVersion":"apiregistration.k8s.io/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"apiregistration.k8s.io/v1beta1","version":"v1beta1"},"serverAddressByClientCIDRs":null},{"name":"extensions","versions":[{"groupVersion":"extensions/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"extensions/v1beta1","version":"v1beta1"},"serverAddressByClientCIDRs":null},{"name":"apps","versions":[{"groupVersion":"apps/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"apps/v1beta1","version":"v1beta1"},"serverAddressByClientCIDRs":null},{"name":"authentication.k8s.io","versions":[{"groupVersion":"authentication.k8s.io/v1","version":"v1"},{"groupVersion":"authentication.k8s.io/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"authentication.k8s.io/v1","version":"v1"},"serverAddressByClientCIDRs":null},{"name":"authorization.k8s.io","versions":[{"groupVersion":"authorization.k8s.io/v1","version":"v1"},{"groupVersion":"authorization.k8s.io/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"authorization.k8s.io/v1","version":"v1"},"serverAddressByClientCIDRs":null},{"name":"autoscaling","versions":[{"groupVersion":"autoscaling/v1","version":"v1"}],"preferredVersion":{"groupVersion":"autoscaling/v1","version":"v1"},"serverAddressByClientCIDRs":null},{"name":"batch","versions":[{"groupVersion":"batch/v1","version":"v1"}],"preferredVersion":{"groupVersion":"batch/v1","version":"v1"},"serverAddressByClientCIDRs":null},{"name":"certificates.k8s.io","versions":[{"groupVersion":"certificates.k8s.io/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"certificates.k8s.io/v1beta1","version":"v1beta1"},"serverAddressByClientCIDRs":null},{"name":"networking.k8s.io","versions":[{"groupVersion":"networking.k8s.io/v1","version":"v1"}],"preferredVersion":{"groupVersion":"networking.k8s.io/v1","version":"v1"},"serverAddressByClientCIDRs":null},{"name":"policy","versions":[{"groupVersion":"policy/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"policy/v1beta1","version":"v1beta1"},"serverAddressByClientCIDRs":null},{"name":"rbac.authorization.k8s.io","versions":[{"groupVersion":"rbac.authorization.k8s.io/v1beta1","version":"v1beta1"},{"groupVersion":"rbac.authorization.k8s.io/v1alpha1","version":"v1alpha1"}],"preferredVersion":{"groupVersion":"rbac.authorization.k8s.io/v1beta1","version":"v1beta1"},"serverAddressByClientCIDRs":null},{"name":"settings.k8s.io","versions":[{"groupVersion":"settings.k8s.io/v1alpha1","version":"v1alpha1"}],"preferredVersion":{"groupVersion":"settings.k8s.io/v1alpha1","version":"v1alpha1"},"serverAddressByClientCIDRs":null},{"name":"storage.k8s.io","versions":[{"groupVersion":"storage.k8s.io/v1","version":"v1"},{"groupVersion":"storage.k8s.io/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"storage.k8s.io/v1","version":"v1"},"serverAddressByClientCIDRs":null},{"name":"apiextensions.k8s.io","versions":[{"groupVersion":"apiextensions.k8s.io/v1beta1","version":"v1beta1"}],"preferredVersion":{"groupVersion":"apiextensions.k8s.io/v1beta1","version":"v1beta1"},"serverAddressByClientCIDRs":null},{"name":"rook.io","versions":[{"groupVersion":"rook.io/v1alpha1","version":"v1alpha1"}],"preferredVersion":{"groupVersion":"rook.io/v1alpha1","version":"v1alpha1"},"serverAddressByClientCIDRs":null}]}

I'm unsure if I'm doing something drastically wrong here or whether this is a genuine bug. I assume the latter since I'm following an example provided with the client, but I'm open to being wrong as well :)

Thanks in advance!

[ceridwen]

This is the same underlying issue as #394. The HTTP response the server is sending contains "serverAddressByClientCIDRs":null, the new version of the client has an added check in V1APIGroup to make sure that that key is not None, and so the client crashes.

[joeblackwaslike]

For anyone else experiencing this error, I was able to get expected behavior with the following monkeypatch

from kubernetes.client.models.v1_api_group import V1APIGroup


def fix_api_group_null_value():
    _server_address_by_client_cid_rs = V1APIGroup.server_address_by_client_cid_rs

    @_server_address_by_client_cid_rs.setter
    def _server_address_by_client_cid_rs(self, server_address_by_client_cid_rs):
        self._server_address_by_client_cid_rs = server_address_by_client_cid_rs

    V1APIGroup.server_address_by_client_cid_rs = _server_address_by_client_cid_rs

[roycaihw]

dup of #394