Add get_backdoor_port to cert.

This adds a get_backdoor_port function to the cert service
which enables returning the eventlet_backdoor port from rpc
for the service.

Change-Id: Iea2b1f9587ea2749c2def921d6a0d1e86f1645ee

nova/cert/manager.py

@@ -34,7 +34,7 @@ LOG = logging.getLogger(__name__)
 
 
 class CertManager(manager.Manager):
-    RPC_API_VERSION = '1.0'
+    RPC_API_VERSION = '1.1'
 
     def init_host(self):
         crypto.ensure_ca_filesystem()
@@ -66,3 +66,6 @@ class CertManager(manager.Manager):
     def decrypt_text(self, context, project_id, text):
         """Decrypt base64 encoded text using the projects private key."""
         return crypto.decrypt_text(project_id, base64.b64decode(text))
+
+    def get_backdoor_port(self, context):
+        return self.backdoor_port

nova/cert/rpcapi.py

@@ -31,6 +31,7 @@ class CertAPI(nova.openstack.common.rpc.proxy.RpcProxy):
     API version history:
 
         1.0 - Initial version.
+        1.1 - Added get_backdoor_port()
     '''
 
     #
@@ -78,3 +79,7 @@ class CertAPI(nova.openstack.common.rpc.proxy.RpcProxy):
         return self.call(ctxt, self.make_msg('decrypt_text',
                                              project_id=project_id,
                                              text=text))
+
+    def get_backdoor_port(self, context, host):
+        return self.call(context, self.make_msg('get_backdoor_port'),
+                         version='1.1')

nova/tests/cert/test_rpcapi.py

@@ -33,8 +33,12 @@ class CertRpcAPITestCase(test.TestCase):
         ctxt = context.RequestContext('fake_user', 'fake_project')
         rpcapi = cert_rpcapi.CertAPI()
         expected_retval = 'foo'
+        expected_version = kwargs.pop('version', rpcapi.BASE_RPC_API_VERSION)
         expected_msg = rpcapi.make_msg(method, **kwargs)
-        expected_msg['version'] = rpcapi.BASE_RPC_API_VERSION
+        expected_msg['version'] = expected_version
+
+        if method == 'get_backdoor_port':
+            del expected_msg['args']['host']
 
         self.call_ctxt = None
         self.call_topic = None
@@ -84,3 +88,7 @@ class CertRpcAPITestCase(test.TestCase):
     def test_decrypt_text(self):
         self._test_cert_api('decrypt_text',
                             project_id='fake_project_id', text='blah')
+
+    def test_get_backdoor_port(self):
+        self._test_cert_api('get_backdoor_port', host='fake_host',
+                            version='1.1')