Pick up proxy buildargs from environment

We currently support any buildarg via --build-args. This patch picks up
the default supported proxy buildargs if set in the user's environment,
to allow for more transparent proxy support.

The --build-args will take precendence.

DocImpact
Implements blueprint: better-proxy-support

Change-Id: I084e5d1cc8f9993d65167878f9983ad58a68e86e

1 files changed, 38 insertions, 0 deletions

diff --git a/kolla/tests/test_build.py b/kolla/tests/test_build.py
index afc2e7546..d1ace9ec8 100644
--- a/kolla/tests/test_build.py
+++ b/kolla/tests/test_build.py
@@ -12,6 +12,7 @@
 
 import fixtures
 import mock
+import os
 
 from kolla.cmd import build
 from kolla.tests import base
@@ -34,6 +35,7 @@ class WorkerThreadTest(base.TestCase):
         # NOTE(jeffrey4l): use a real, temporary dir
         FAKE_IMAGE['path'] = self.useFixture(fixtures.TempDir()).path
 
+    @mock.patch.dict(os.environ, clear=True)
     @mock.patch('docker.Client')
     def test_build_image(self, mock_client):
         queue = mock.Mock()
@@ -48,6 +50,7 @@ class WorkerThreadTest(base.TestCase):
             nocache=False, rm=True, pull=True, forcerm=True,
             buildargs=None)
 
+    @mock.patch.dict(os.environ, clear=True)
     @mock.patch('docker.Client')
     def test_build_image_with_build_arg(self, mock_client):
         build_args = {
@@ -64,3 +67,38 @@ class WorkerThreadTest(base.TestCase):
             path=FAKE_IMAGE['path'], tag=FAKE_IMAGE['fullname'],
             nocache=False, rm=True, pull=True, forcerm=True,
             buildargs=build_args)
+
+    @mock.patch.dict(os.environ, {'http_proxy': 'http://FROM_ENV:8080'},
+                     clear=True)
+    @mock.patch('docker.Client')
+    def test_build_arg_from_env(self, mock_client):
+        build_args = {
+            'http_proxy': 'http://FROM_ENV:8080',
+        }
+        worker = build.WorkerThread(mock.Mock(),
+                                    mock.Mock(),
+                                    self.conf)
+        worker.builder(FAKE_IMAGE)
+
+        mock_client().build.assert_called_once_with(
+            path=FAKE_IMAGE['path'], tag=FAKE_IMAGE['fullname'],
+            nocache=False, rm=True, pull=True, forcerm=True,
+            buildargs=build_args)
+
+    @mock.patch.dict(os.environ, {'http_proxy': 'http://FROM_ENV:8080'},
+                     clear=True)
+    @mock.patch('docker.Client')
+    def test_build_arg_precedence(self, mock_client):
+        build_args = {
+            'http_proxy': 'http://localhost:8080',
+        }
+        self.conf.set_override('build_args', build_args)
+        worker = build.WorkerThread(mock.Mock(),
+                                    mock.Mock(),
+                                    self.conf)
+        worker.builder(FAKE_IMAGE)
+
+        mock_client().build.assert_called_once_with(
+            path=FAKE_IMAGE['path'], tag=FAKE_IMAGE['fullname'],
+            nocache=False, rm=True, pull=True, forcerm=True,
+            buildargs=build_args)