Make Diagnostics and Sync API's optional

Change-Id: I55ddaa72b95a4b79bee644d0cc6ba8216307a3e8

etc/moniker/moniker.conf.sample

@@ -52,6 +52,9 @@ default_log_levels = amqplib=WARN, sqlalchemy=WARN, boto=WARN, suds=INFO, keysto
 # Authentication strategy to use - can be either "noauth" or "keystone"
 #auth_strategy = noauth
 
+# Enabled API Version 1 extensions
+#enabled_extensions_v1 = diagnostics, sync, import, export
+
 #-----------------------
 # Agent Service
 #-----------------------

moniker/api/v1/__init__.py

@@ -15,21 +15,36 @@
 # under the License.
 import flask
 from stevedore import extension
+from stevedore import named
+from moniker.openstack.common import cfg
 from moniker.openstack.common import log as logging
 
 LOG = logging.getLogger(__name__)
 
+cfg.CONF.register_opts([
+    cfg.ListOpt('enabled-extensions-v1', default=[],
+                help='Enabled API Extensions'),
+], group='service:api')
+
 
 def factory(global_config, **local_conf):
     app = flask.Flask('moniker.api.v1')
 
     # TODO(kiall): Ideally, we want to make use of the Plugin class here.
     #              This works for the moment though.
-    mgr = extension.ExtensionManager('moniker.api.v1')
+    def _register_blueprint(ext):
-
-    def _load_extension(ext):
         app.register_blueprint(ext.plugin)
 
-    mgr.map(_load_extension)
+    # Add all in-built APIs
+    mgr = extension.ExtensionManager('moniker.api.v1')
+    mgr.map(_register_blueprint)
+
+    # Add any (enabled) optional extensions
+    extensions = cfg.CONF['service:api'].enabled_extensions_v1
+
+    if len(extensions) > 0:
+        extmgr = named.NamedExtensionManager('moniker.api.v1.extensions',
+                                             names=extensions)
+        extmgr.map(_register_blueprint)
 
     return app

setup.py

@@ -62,8 +62,10 @@ setup(
         records = moniker.api.v1.records:blueprint
         servers = moniker.api.v1.servers:blueprint
         tsigkeys = moniker.api.v1.tsigkeys:blueprint
-        diagnostics = moniker.api.v1.diagnostics:blueprint
+
-        sync = moniker.api.v1.sync:blueprint
+        [moniker.api.v1.extensions]
+        diagnostics = moniker.api.v1.extensions.diagnostics:blueprint
+        sync = moniker.api.v1.extensions.sync:blueprint
 
         [moniker.storage]
         sqlalchemy = moniker.storage.impl_sqlalchemy:SQLAlchemyStorage