metadata proxy will use syslog as default log

Bug #1183614

Change-Id: I39f07fc7d232148c50cf85fbc4ca6ca7cde8fdfa

quantum/agent/common/config.py

@@ -55,6 +55,8 @@ def get_log_args(conf, log_file_name):
             log_dir = os.path.dirname(conf.log_file)
         if log_dir:
             cmd_args.append('--log-dir=%s' % log_dir)
+    else:
+        cmd_args.append('--use-syslog')
     return cmd_args
 
 

quantum/tests/unit/test_dhcp_agent.py

@@ -362,7 +362,7 @@ class TestLogArgs(base.BaseTestCase):
                      'log_dir': None,
                      'log_file': None}
         conf = dhcp_agent.DictModel(conf_dict)
-        expected_args = ['--debug']
+        expected_args = ['--debug', '--use-syslog']
         args = config.get_log_args(conf, 'log_file_name')
         self.assertEqual(expected_args, args)