Config options: Centralize ipv6 options

The config options of the section
"nova/ipv6" got moved to the new central
location "nova/conf/ipv6.py".

Change-Id: Ia53dd8f72755a645eb535e1866b8b662d159debd
Implements: blueprint centralize-config-options-newton

nova/conf/__init__.py

@@ -48,6 +48,7 @@ from nova.conf import hyperv
 # from nova.conf import image
 # from nova.conf import imagecache
 from nova.conf import image_file_url
+from nova.conf import ipv6
 from nova.conf import ironic
 from nova.conf import keymgr
 # from nova.conf import keystone_authtoken
@@ -114,6 +115,7 @@ mks.register_opts(CONF)
 # image.register_opts(CONF)
 # imagecache.register_opts(CONF)
 image_file_url.register_opts(CONF)
+ipv6.register_opts(CONF)
 ironic.register_opts(CONF)
 keymgr.register_opts(CONF)
 # keystone_authtoken.register_opts(CONF)

nova/conf/ipv6.py

@@ -0,0 +1,32 @@
+# Copyright (c) 2016 Intel, Inc.
+# Copyright (c) 2013 OpenStack Foundation
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo_config import cfg
+
+
+ipv6_backend = cfg.StrOpt('ipv6_backend',
+    default='rfc2462',
+    help='Backend to use for IPv6 generation')
+
+IPV6_OPTS = [ipv6_backend]
+
+
+def register_opts(conf):
+    conf.register_opts(IPV6_OPTS)
+
+
+def list_opts():
+    return {'DEFAULT': IPV6_OPTS}

nova/ipv6/api.py

@@ -12,16 +12,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from oslo_config import cfg
 from stevedore import driver
 
+import nova.conf
 
-ipv6_backend_opt = cfg.StrOpt('ipv6_backend',
+CONF = nova.conf.CONF
-                              default='rfc2462',
-                              help='Backend to use for IPv6 generation')
-
-CONF = cfg.CONF
-CONF.register_opt(ipv6_backend_opt)
 IMPL = None
 
 

nova/opts.py

@@ -30,7 +30,6 @@ import nova.db.base
 import nova.db.sqlalchemy.api
 import nova.exception
 import nova.image.download.file
-import nova.ipv6.api
 import nova.netconf
 import nova.notifications
 import nova.paths
@@ -47,7 +46,6 @@ def list_opts():
          itertools.chain(
              [nova.conductor.tasks.live_migrate.migrate_opt],
              [nova.db.base.db_driver_opt],
-             [nova.ipv6.api.ipv6_backend_opt],
              [nova.servicegroup.api.servicegroup_driver_opt],
              nova.cmd.novnc.opts,
              nova.console.manager.console_manager_opts,