Number of pools in adapter is configurable

Default increased from 10 to 25
Signed-off-by: Joffrey F <joffrey@docker.com>

docker/client.py

@@ -40,7 +40,8 @@ class Client(
         api.VolumeApiMixin):
     def __init__(self, base_url=None, version=None,
                  timeout=constants.DEFAULT_TIMEOUT_SECONDS, tls=False,
-                 user_agent=constants.DEFAULT_USER_AGENT):
+                 user_agent=constants.DEFAULT_USER_AGENT,
+                 num_pools=constants.DEFAULT_NUM_POOLS):
         super(Client, self).__init__()
 
         if tls and not base_url:
@@ -58,7 +59,9 @@ class Client(
             base_url, constants.IS_WINDOWS_PLATFORM, tls=bool(tls)
         )
         if base_url.startswith('http+unix://'):
-            self._custom_adapter = UnixAdapter(base_url, timeout)
+            self._custom_adapter = UnixAdapter(
+                base_url, timeout, num_pools=num_pools
+            )
             self.mount('http+docker://', self._custom_adapter)
             self._unmount('http://', 'https://')
             self.base_url = 'http+docker://localunixsocket'
@@ -68,7 +71,9 @@ class Client(
                     'The npipe:// protocol is only supported on Windows'
                 )
             try:
-                self._custom_adapter = NpipeAdapter(base_url, timeout)
+                self._custom_adapter = NpipeAdapter(
+                    base_url, timeout, num_pools=num_pools
+                )
             except NameError:
                 raise errors.DockerException(
                     'Install pypiwin32 package to enable npipe:// support'
@@ -80,7 +85,9 @@ class Client(
             if isinstance(tls, TLSConfig):
                 tls.configure_client(self)
             elif tls:
-                self._custom_adapter = ssladapter.SSLAdapter()
+                self._custom_adapter = ssladapter.SSLAdapter(
+                    num_pools=num_pools
+                )
                 self.mount('https://', self._custom_adapter)
             self.base_url = base_url
 

docker/constants.py

@@ -15,3 +15,4 @@ INSECURE_REGISTRY_DEPRECATION_WARNING = \
 IS_WINDOWS_PLATFORM = (sys.platform == 'win32')
 
 DEFAULT_USER_AGENT = "docker-py/{0}".format(version)
+DEFAULT_NUM_POOLS = 25

docker/transport/npipeconn.py

 import six
 import requests.adapters
 
+from .. import constants
 from .npipesocket import NpipeSocket
 
 if six.PY3:
@@ -33,9 +34,9 @@ class NpipeHTTPConnection(httplib.HTTPConnection, object):
 
 
 class NpipeHTTPConnectionPool(urllib3.connectionpool.HTTPConnectionPool):
-    def __init__(self, npipe_path, timeout=60):
+    def __init__(self, npipe_path, timeout=60, maxsize=10):
         super(NpipeHTTPConnectionPool, self).__init__(
-            'localhost', timeout=timeout
+            'localhost', timeout=timeout, maxsize=maxsize
         )
         self.npipe_path = npipe_path
         self.timeout = timeout
@@ -47,11 +48,12 @@ class NpipeHTTPConnectionPool(urllib3.connectionpool.HTTPConnectionPool):
 
 
 class NpipeAdapter(requests.adapters.HTTPAdapter):
-    def __init__(self, base_url, timeout=60):
+    def __init__(self, base_url, timeout=60,
+                 num_pools=constants.DEFAULT_NUM_POOLS):
         self.npipe_path = base_url.replace('npipe://', '')
         self.timeout = timeout
         self.pools = RecentlyUsedContainer(
-            10, dispose_func=lambda p: p.close()
+            num_pools, dispose_func=lambda p: p.close()
         )
         super(NpipeAdapter, self).__init__()
 

docker/transport/unixconn.py

@@ -2,6 +2,8 @@ import six
 import requests.adapters
 import socket
 
+from .. import constants
+
 if six.PY3:
     import http.client as httplib
 else:
@@ -12,6 +14,7 @@ try:
 except ImportError:
     import urllib3
 
+
 RecentlyUsedContainer = urllib3._collections.RecentlyUsedContainer
 
 
@@ -32,28 +35,31 @@ class UnixHTTPConnection(httplib.HTTPConnection, object):
 
 
 class UnixHTTPConnectionPool(urllib3.connectionpool.HTTPConnectionPool):
-    def __init__(self, base_url, socket_path, timeout=60):
+    def __init__(self, base_url, socket_path, timeout=60, maxsize=10):
         super(UnixHTTPConnectionPool, self).__init__(
-            'localhost', timeout=timeout
+            'localhost', timeout=timeout, maxsize=maxsize
         )
         self.base_url = base_url
         self.socket_path = socket_path
         self.timeout = timeout
 
     def _new_conn(self):
-        return UnixHTTPConnection(self.base_url, self.socket_path,
-                                  self.timeout)
+        return UnixHTTPConnection(
+            self.base_url, self.socket_path, self.timeout
+        )
 
 
 class UnixAdapter(requests.adapters.HTTPAdapter):
-    def __init__(self, socket_url, timeout=60):
+    def __init__(self, socket_url, timeout=60,
+                 num_pools=constants.DEFAULT_NUM_POOLS):
         socket_path = socket_url.replace('http+unix://', '')
         if not socket_path.startswith('/'):
             socket_path = '/' + socket_path
         self.socket_path = socket_path
         self.timeout = timeout
-        self.pools = RecentlyUsedContainer(10,
-                                           dispose_func=lambda p: p.close())
+        self.pools = RecentlyUsedContainer(
+            num_pools, dispose_func=lambda p: p.close()
+        )
         super(UnixAdapter, self).__init__()
 
     def get_connection(self, url, proxies=None):