ifcfg: Add support for dns_servers

Adds in the ability to optionally configure DNS
server settings via the ifcfg file formats.
The dns_servers JSON is an array which currently
supports either 1 or 2 DNS servers (per limitations
of the ifcfg format).

Change-Id: I9edecfdd4e1d0f39883b72be554cd92c5685881d

1 files changed, 11 insertions, 0 deletions

diff --git a/os_net_config/tests/test_objects.py b/os_net_config/tests/test_objects.py
index c824ba8..8488370 100644
--- a/os_net_config/tests/test_objects.py
+++ b/os_net_config/tests/test_objects.py
@@ -119,6 +119,17 @@ class TestInterface(base.TestCase):
         interface1 = objects.object_from_json(json.loads(data))
         self.assertEqual("--foobar", interface1.dhclient_args)
 
+    def test_from_json_dns_servers(self):
+        data = """{
+"type": "interface",
+"name": "em1",
+"use_dhcp": true,
+"dns_servers": ["1.2.3.4"]
+}
+"""
+        interface1 = objects.object_from_json(json.loads(data))
+        self.assertEqual(["1.2.3.4"], interface1.dns_servers)
+
     def test_from_json_dhcp_nic1(self):
         def dummy_numbered_nics(nic_mapping=None):
             return {"nic1": "em3"}