Port rescue API to v3 Part 1

This changeset only copies the v2 files (implementation and test)
into the appropriate v3 directories unchanged. The copy as-is
will not be loaded by either the v2 or v3 extension loaders. The
second changeset will then make the changes required for it to
work as a v3 extension.

This is being tried in order to make reviewing of extension
porting easier as gerrit will display only what is actually
changed for v3 rather than entirely new files

Partially implements blueprint nova-v3-api

Change-Id: I8dc2b42b4ffb4618978856d5520485cd34e726d9

1 files changed, 96 insertions, 0 deletions

diff --git a/nova/api/openstack/compute/plugins/v3/rescue.py b/nova/api/openstack/compute/plugins/v3/rescue.py
new file mode 100644
index 000000000..c89d11117
--- /dev/null
+++ b/nova/api/openstack/compute/plugins/v3/rescue.py
@@ -0,0 +1,96 @@
+#   Copyright 2011 OpenStack Foundation
+#
+#   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.
+
+"""The rescue mode extension."""
+
+from oslo.config import cfg
+import webob
+from webob import exc
+
+from nova.api.openstack import common
+from nova.api.openstack import extensions as exts
+from nova.api.openstack import wsgi
+from nova import compute
+from nova import exception
+from nova import utils
+
+
+CONF = cfg.CONF
+authorize = exts.extension_authorizer('compute', 'rescue')
+
+
+class RescueController(wsgi.Controller):
+    def __init__(self, *args, **kwargs):
+        super(RescueController, self).__init__(*args, **kwargs)
+        self.compute_api = compute.API()
+
+    def _get_instance(self, context, instance_id):
+        try:
+            return self.compute_api.get(context, instance_id)
+        except exception.InstanceNotFound:
+            msg = _("Server not found")
+            raise exc.HTTPNotFound(msg)
+
+    @wsgi.action('rescue')
+    def _rescue(self, req, id, body):
+        """Rescue an instance."""
+        context = req.environ["nova.context"]
+        authorize(context)
+
+        if body['rescue'] and 'adminPass' in body['rescue']:
+            password = body['rescue']['adminPass']
+        else:
+            password = utils.generate_password()
+
+        instance = self._get_instance(context, id)
+        try:
+            self.compute_api.rescue(context, instance,
+                                    rescue_password=password)
+        except exception.InstanceInvalidState as state_error:
+            common.raise_http_conflict_for_instance_invalid_state(state_error,
+                                                                  'rescue')
+        except exception.InvalidVolume as volume_error:
+            raise exc.HTTPConflict(explanation=volume_error.format_message())
+        except exception.InstanceNotRescuable as non_rescuable:
+            raise exc.HTTPBadRequest(
+                explanation=non_rescuable.format_message())
+
+        return {'adminPass': password}
+
+    @wsgi.action('unrescue')
+    def _unrescue(self, req, id, body):
+        """Unrescue an instance."""
+        context = req.environ["nova.context"]
+        authorize(context)
+        instance = self._get_instance(context, id)
+        try:
+            self.compute_api.unrescue(context, instance)
+        except exception.InstanceInvalidState as state_error:
+            common.raise_http_conflict_for_instance_invalid_state(state_error,
+                                                                  'unrescue')
+        return webob.Response(status_int=202)
+
+
+class Rescue(exts.ExtensionDescriptor):
+    """Instance rescue mode."""
+
+    name = "Rescue"
+    alias = "os-rescue"
+    namespace = "http://docs.openstack.org/compute/ext/rescue/api/v1.1"
+    updated = "2011-08-18T00:00:00+00:00"
+
+    def get_controller_extensions(self):
+        controller = RescueController()
+        extension = exts.ControllerExtension(self, 'servers', controller)
+        return [extension]