TLS integration for latest pythonk8sclient

swagger_client uses PoolManager from urllib3. PoolManager keeps the
connection_pool_kw passed during the init time and uses the same later
while initiating HTTPSConnection. Existing implementation instantiates
RESTClientObject() at import time, without giving an option to pass
the security parameters, viz. key_file, ca_certs etc. So we needed to
change the way instantiation/initialization was happening.

(copied from I3b490bbb47eb5f961951708dabe6c1abfbcece4e)

Change-Id: I6df227bcd030cb8c374bc83bb44dfea980c893b3

k8sclient/client/api_client.py

@@ -65,7 +65,8 @@ class ApiClient(object):
     :param header_value: a header value to pass when making calls to the API.
     """
     def __init__(self, host=Configuration().host,
-                 header_name=None, header_value=None, cookie=None):
+                 header_name=None, header_value=None, cookie=None,
+                 key_file=None, cert_file=None, ca_certs=None):
 
         """
         Constructor of the class.
@@ -77,6 +78,9 @@ class ApiClient(object):
         self.cookie = cookie
         # Set default User-Agent.
         self.user_agent = 'Python-Swagger'
+        self.RESTClient = RESTClient(key_file=key_file,
+                                     cert_file=cert_file,
+                                     ca_certs=ca_certs)
 
     @property
     def user_agent(self):
@@ -325,38 +329,38 @@ class ApiClient(object):
     def request(self, method, url, query_params=None, headers=None,
                 post_params=None, body=None):
         """
-        Makes the HTTP request using RESTClient.
+        Makes the HTTP request using instance of rest client.
         """
         if method == "GET":
-            return RESTClient.GET(url,
-                                  query_params=query_params,
-                                  headers=headers)
+            return self.RESTClient.GET(url,
+                                       query_params=query_params,
+                                       headers=headers)
         elif method == "HEAD":
-            return RESTClient.HEAD(url,
-                                   query_params=query_params,
-                                   headers=headers)
+            return self.RESTClient.HEAD(url,
+                                        query_params=query_params,
+                                        headers=headers)
         elif method == "POST":
-            return RESTClient.POST(url,
-                                   query_params=query_params,
-                                   headers=headers,
-                                   post_params=post_params,
-                                   body=body)
+            return self.RESTClient.POST(url,
+                                        query_params=query_params,
+                                        headers=headers,
+                                        post_params=post_params,
+                                        body=body)
         elif method == "PUT":
-            return RESTClient.PUT(url,
-                                  query_params=query_params,
-                                  headers=headers,
-                                  post_params=post_params,
-                                  body=body)
+            return self.RESTClient.PUT(url,
+                                       query_params=query_params,
+                                       headers=headers,
+                                       post_params=post_params,
+                                       body=body)
         elif method == "PATCH":
-            return RESTClient.PATCH(url,
-                                    query_params=query_params,
-                                    headers=headers,
-                                    post_params=post_params,
-                                    body=body)
+            return self.RESTClient.PATCH(url,
+                                         query_params=query_params,
+                                         headers=headers,
+                                         post_params=post_params,
+                                         body=body)
         elif method == "DELETE":
-            return RESTClient.DELETE(url,
-                                     query_params=query_params,
-                                     headers=headers)
+            return self.RESTClient.DELETE(url,
+                                          query_params=query_params,
+                                          headers=headers)
         else:
             raise ValueError(
                 "http method must be `GET`, `HEAD`,"

k8sclient/client/rest.py

@@ -232,56 +232,52 @@ class ApiException(Exception):
 
 class RESTClient(object):
     """
-    A class with all class methods to perform JSON requests.
+    A class with methods to perform JSON requests.
     """
 
-    IMPL = RESTClientObject()
+    def __init__(self, key_file=None, cert_file=None, ca_certs=None):
+        self.IMPL = RESTClientObject(key_file=key_file,
+                                     cert_file=cert_file,
+                                     ca_certs=ca_certs)
 
-    @classmethod
-    def request(cls, *n, **kw):
+    def request(self, *n, **kw):
         """
         Perform a REST request and parse the response.
         """
-        return cls.IMPL.request(*n, **kw)
+        return self.IMPL.request(*n, **kw)
 
-    @classmethod
-    def GET(cls, *n, **kw):
+    def GET(self, *n, **kw):
         """
         Perform a GET request using `RESTClient.request()`.
         """
-        return cls.IMPL.GET(*n, **kw)
+        return self.IMPL.GET(*n, **kw)
 
-    @classmethod
-    def HEAD(cls, *n, **kw):
+    def HEAD(self, *n, **kw):
         """
         Perform a HEAD request using `RESTClient.request()`.
         """
-        return cls.IMPL.GET(*n, **kw)
+        return self.IMPL.GET(*n, **kw)
 
-    @classmethod
-    def POST(cls, *n, **kw):
+    def POST(self, *n, **kw):
         """
         Perform a POST request using `RESTClient.request()`
         """
-        return cls.IMPL.POST(*n, **kw)
+        return self.IMPL.POST(*n, **kw)
 
-    @classmethod
-    def PUT(cls, *n, **kw):
+    def PUT(self, *n, **kw):
         """
         Perform a PUT request using `RESTClient.request()`
         """
-        return cls.IMPL.PUT(*n, **kw)
+        return self.IMPL.PUT(*n, **kw)
 
-    @classmethod
-    def PATCH(cls, *n, **kw):
+    def PATCH(self, *n, **kw):
         """
         Perform a PATCH request using `RESTClient.request()`
         """
-        return cls.IMPL.PATCH(*n, **kw)
+        return self.IMPL.PATCH(*n, **kw)
 
-    @classmethod
-    def DELETE(cls, *n, **kw):
+    def DELETE(self, *n, **kw):
         """
         Perform a DELETE request using `RESTClient.request()`
         """
-        return cls.IMPL.DELETE(*n, **kw)
+        return self.IMPL.DELETE(*n, **kw)