Force IPv4 settings for APT

* Create /etc/apt/apt.conf.d/05disable-ipv6 and set Acquire::ForceIPv4 "true";
  to disable IPv6 as Ubuntu DNS returns IPv6 sometimes.
* Delete the same part from fuel_agent_ci cloud-init template as it should be
  configured by Orchestrator

Change-Id: I90fe58157c3eac04842102b1cb956bbeb324413a
Closes-Bug: 1450004
Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

fuel_agent_ci/fuel_agent_ci/tests/templates/cloud_config_ubuntu.jinja2

@@ -44,13 +44,6 @@ write_files:
      path: /etc/nailgun-agent/config.yaml
  -   content: target
      path: /etc/nailgun_systemtype
- -   content: APT::Get::AllowUnauthenticated 1;
-     path: /etc/apt/apt.conf.d/02mirantis-allow-unsigned
-
-
-apt_sources:
- - source: deb http://{{ MASTER_IP }}:8080/ubuntu/fuelweb/x86_64 trusty main
-
 
 mcollective:
   conf:

nailgun/nailgun/orchestrator/tasks_serializer.py

@@ -178,6 +178,7 @@ class UploadMOSRepo(GenericRolesHook):
                     'cmd': '> /etc/apt/sources.list',
                     'timeout': 10
                 }})
+            yield templates.make_ubuntu_apt_disable_ipv6(uids)
             # NOTE(kozhukalov):
             # This task is to allow installing packages from
             # unauthenticated repositories.

nailgun/nailgun/orchestrator/tasks_templates.py

@@ -87,6 +87,12 @@ def make_ubuntu_preferences_task(uids, repo):
     return make_upload_task(uids, preferences_content, preferences_path)
 
 
+def make_ubuntu_apt_disable_ipv6(uids):
+    config_content = 'Acquire::ForceIPv4 "true";\n'
+    config_path = '/etc/apt/apt.conf.d/05disable-ipv6'
+    return make_upload_task(uids, config_content, config_path)
+
+
 def make_ubuntu_unauth_repos_task(uids):
     # NOTE(kozhukalov): This task is to allow installing packages
     # from unauthenticated repositories. Apt has special

nailgun/nailgun/test/unit/test_stages_task_serialization.py

@@ -90,7 +90,7 @@ class TestHooksSerializersUbuntu(BaseTaskSerializationTestUbuntu):
         task = tasks_serializer.UploadMOSRepo(
             task_config, self.cluster, self.nodes)
         serialized = list(task.serialize())
-        self.assertEqual(len(serialized), 16)
+        self.assertEqual(len(serialized), 17)
         self.assertEqual(serialized[0]['type'], 'shell')
         self.assertEqual(
             serialized[0]['parameters']['cmd'], '> /etc/apt/sources.list')
@@ -108,8 +108,9 @@ class TestHooksSerializersUbuntu(BaseTaskSerializationTestUbuntu):
         self.assertEqual(serialized[12]['type'], 'upload_file')
         self.assertEqual(serialized[13]['type'], 'upload_file')
         self.assertEqual(serialized[14]['type'], 'upload_file')
-        self.assertEqual(serialized[15]['type'], 'shell')
-        self.assertEqual(serialized[15]['parameters']['cmd'], 'apt-get update')
+        self.assertEqual(serialized[15]['type'], 'upload_file')
+        self.assertEqual(serialized[16]['type'], 'shell')
+        self.assertEqual(serialized[16]['parameters']['cmd'], 'apt-get update')
         self.assertItemsEqual(serialized[3]['uids'], self.all_uids)
 
 
@@ -308,7 +309,7 @@ class TestPreTaskSerialization(BaseTaskSerializationTestUbuntu):
         self.graph = deployment_graph.AstuteGraph(self.cluster)
         self.cluster.release.operating_system = consts.RELEASE_OS.ubuntu
         tasks = self.graph.pre_tasks_serialize(self.nodes)
-        self.assertEqual(len(tasks), 19)
+        self.assertEqual(len(tasks), 20)
         tasks_tests = [('shell', ['master']),
                        ('shell', sorted(self.all_uids)),
                        ('upload_file', sorted(self.all_uids)),
@@ -325,6 +326,7 @@ class TestPreTaskSerialization(BaseTaskSerializationTestUbuntu):
                        ('upload_file', sorted(self.all_uids)),
                        ('upload_file', sorted(self.all_uids)),
                        ('upload_file', sorted(self.all_uids)),
+                       ('upload_file', sorted(self.all_uids)),
                        ('copy_files', sorted(self.all_uids)),
                        ('sync', sorted(self.all_uids)),
                        ('shell', sorted(self.all_uids))]

nailgun/nailgun/test/unit/test_tasks_templates.py

@@ -50,6 +50,16 @@ class TestMakeTask(base.BaseTestCase):
              'type': 'upload_file',
              'uids': [1, 2, 3]})
 
+    def test_make_ubuntu_apt_disable_ipv6(self):
+        result = tasks_templates.make_ubuntu_apt_disable_ipv6([1, 2, 3])
+        self.assertEqual(
+            result,
+            {'parameters': {
+                'data': 'Acquire::ForceIPv4 "true";\n',
+                'path': '/etc/apt/apt.conf.d/05disable-ipv6'},
+             'type': 'upload_file',
+             'uids': [1, 2, 3]})
+
     def test_make_ubuntu_unauth_repos_task(self):
         result = tasks_templates.make_ubuntu_unauth_repos_task([1, 2, 3])
         self.assertEqual(