add no_proxy support to configuration and REST client.

Author: itaru2622

kubernetes/client/configuration.py

@@ -156,6 +156,9 @@ def __init__(self, host="http://localhost",
         self.proxy = None
         """Proxy URL
         """
+        self.no_proxy = None
+        """bypass proxy for host in the no_proxy list.
+        """
         self.proxy_headers = None
         """Proxy headers
         """

kubernetes/client/rest.py

@@ -25,6 +25,7 @@
 import urllib3
 
 from kubernetes.client.exceptions import ApiException, ApiValueError
+from requests.utils import should_bypass_proxies
 
 
 logger = logging.getLogger(__name__)
@@ -83,7 +84,7 @@ def __init__(self, configuration, pools_size=4, maxsize=None):
                 maxsize = 4
 
         # https pool manager
-        if configuration.proxy:
+        if configuration.proxy and not should_bypass_proxies(configuration.host, no_proxy=configuration.no_proxy or ''):
             self.pool_manager = urllib3.ProxyManager(
                 num_pools=pools_size,
                 maxsize=maxsize,

kubernetes/test/test_api_client.py

@@ -6,7 +6,8 @@
 import unittest
 
 import kubernetes
-
+from kubernetes.client.configuration import Configuration
+import urllib3
 
 class TestApiClient(unittest.TestCase):
 
@@ -23,3 +24,28 @@ def test_atexit_closes_threadpool(self):
         self.assertIsNotNone(client._pool)
         atexit._run_exitfuncs()
         self.assertIsNone(client._pool)
+
+    def test_rest_proxycare(self):
+
+        pool = { 'proxy': urllib3.ProxyManager, 'direct': urllib3.PoolManager }
+
+        for dst, proxy, no_proxy, expected_pool in [
+             ( 'http://kube.local/',           None,                       None,                           pool['direct']),
+             ( 'http://kube.local/',          'http://proxy.local:8080/',  None,                           pool['proxy']),
+             ( 'http://127.0.0.1:8080/',      'http://proxy.local:8080/',  'localhost,127.0.0.0/8,.local', pool['direct']),
+             ( 'http://kube.local/',          'http://proxy.local:8080/',  'localhost,127.0.0.0/8,.local', pool['direct']),
+             ( 'http://kube.others.com:1234/','http://proxy.local:8080/',  'localhost,127.0.0.0/8,.local', pool['proxy']),
+             ( 'http://kube.others.com:1234/','http://proxy.local:8080/',  '*',                            pool['direct']),
+        ]:
+            # setup input
+            config = Configuration()
+            setattr(config, 'host', dst)
+            if proxy is not None:
+                setattr(config, 'proxy', proxy)
+            if no_proxy is not None:
+                setattr(config, 'no_proxy', no_proxy)
+            # setup done
+
+            # test
+            client = kubernetes.client.ApiClient(configuration=config)
+            self.assertEqual( expected_pool, type(client.rest_client.pool_manager) )