diff --git a/reddwarf/common/api.py b/reddwarf/common/api.py
index cfbf5becd1..5293abef84 100644
--- a/reddwarf/common/api.py
+++ b/reddwarf/common/api.py
@@ -19,6 +19,7 @@ from reddwarf.common import wsgi
 from reddwarf.versions import VersionsController
 from reddwarf.flavor.service import FlavorController
 from reddwarf.instance.service import InstanceController
+from reddwarf.extensions.mgmt.host.instance.service import HostInstanceController
 
 
 class API(wsgi.Router):
@@ -45,6 +46,13 @@ class API(wsgi.Router):
         path = "/{tenant_id}/flavors"
         mapper.resource("flavor", path, controller=flavor_resource)
 
+    def _host_instance_router(self, mapper):
+        host_instance_resource = HostInstanceController().create_resource()
+        path = "/{tenant_id}/mgmt/hosts/{host_id}/instances"
+        mapper.resource("hostinstance", path,
+                        controller=host_instance_resource,
+                        member={'action': 'POST'})
+
 
 def app_factory(global_conf, **local_conf):
     return API()
diff --git a/reddwarf/extensions/mgmt.py b/reddwarf/extensions/mgmt.py
index c9104e8be0..de9d31fec3 100644
--- a/reddwarf/extensions/mgmt.py
+++ b/reddwarf/extensions/mgmt.py
@@ -21,6 +21,7 @@ from reddwarf.common import extensions
 from reddwarf.common import wsgi
 from reddwarf.extensions.mgmt.instances.service import MgmtInstanceController
 from reddwarf.extensions.mgmt.host.service import HostController
+from reddwarf.extensions.mgmt.host.instance.service import HostInstanceController
 from reddwarf.extensions.mgmt.volume.service import StorageController
 
 
@@ -74,4 +75,14 @@ class Mgmt(extensions.ExtensionsDescriptor):
              )
         resources.append(storage)
 
+        host_instances = extensions.ResourceExtension('instances',
+            HostInstanceController(),
+            parent={'member_name': 'host',
+                    'collection_name': '{tenant_id}/mgmt/hosts'},
+            deserializer=wsgi.RequestDeserializer(),
+            serializer=serializer,
+            collection_actions={'action': 'POST'},
+            )
+        resources.append(host_instances)
+
         return resources
diff --git a/reddwarf/extensions/mgmt/host/instance/__init__.py b/reddwarf/extensions/mgmt/host/instance/__init__.py
new file mode 100644
index 0000000000..cbf4a45060
--- /dev/null
+++ b/reddwarf/extensions/mgmt/host/instance/__init__.py
@@ -0,0 +1,16 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2012 OpenStack LLC.
+# 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.
diff --git a/reddwarf/extensions/mgmt/host/instance/service.py b/reddwarf/extensions/mgmt/host/instance/service.py
new file mode 100644
index 0000000000..a68a84e313
--- /dev/null
+++ b/reddwarf/extensions/mgmt/host/instance/service.py
@@ -0,0 +1,60 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2012 OpenStack LLC.
+# 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.
+
+import logging
+
+from reddwarf.common import exception
+from reddwarf.common import wsgi
+from reddwarf.extensions.mgmt.host import models
+
+LOG = logging.getLogger(__name__)
+
+
+class HostInstanceController(wsgi.Controller):
+    """Controller for all instances on specific hosts."""
+
+    def action(self, req, body, tenant_id, host_id):
+        LOG.info("req : '%s'\n\n" % req)
+        LOG.info("Committing an ACTION against host %s for tenant '%s'"
+                 % (host_id, tenant_id))
+        if not body:
+            raise exception.BadRequest(_("Invalid request body."))
+        context = req.environ[wsgi.CONTEXT_KEY]
+        host = models.DetailedHost.load(context, host_id)
+        _actions = {
+            'update': self._action_update
+            }
+        selected_action = None
+        for key in body:
+            if key in _actions:
+                if selected_action is not None:
+                    msg = _("Only one action can be specified per request.")
+                    raise exception.BadRequest(msg)
+                selected_action = _actions[key]
+            else:
+                msg = _("Invalid host action: %s") % key
+                raise exception.BadRequest(msg)
+
+        if selected_action:
+            return selected_action(context, host, body)
+        else:
+            raise exception.BadRequest(_("Invalid request body."))
+
+    def _action_update(self, context, host, body):
+        LOG.debug("Updating all instances for host: %s" % host.name)
+        host.update_all(context)
+        return wsgi.Result(None, 202)
diff --git a/reddwarf/extensions/mgmt/host/models.py b/reddwarf/extensions/mgmt/host/models.py
index 4087ea8340..2bbbfea5a4 100644
--- a/reddwarf/extensions/mgmt/host/models.py
+++ b/reddwarf/extensions/mgmt/host/models.py
@@ -77,6 +77,12 @@ class DetailedHost(object):
                     "instance: %s" % instance['server_id'])
                 instance['id'] = None
 
+    def update_all(self, context):
+        num_i = len(self.instances)
+        LOG.debug("Host %s has %s instances to update" % (self.name, num_i))
+        for instance in self.instances:
+            client = create_guest_client(context, instance['id'])
+            client.update_guest()
 
     @staticmethod
     def load(context, name):
diff --git a/reddwarf/guestagent/api.py b/reddwarf/guestagent/api.py
index 18dd19d203..c29d8d01b7 100644
--- a/reddwarf/guestagent/api.py
+++ b/reddwarf/guestagent/api.py
@@ -177,3 +177,7 @@ class API(object):
         LOG.debug(_("Check Volume Info on Instance %s"), self.id)
         return self._call("get_filesystem_stats", AGENT_LOW_TIMEOUT,
                           fs_path="/var/lib/mysql")
+
+    def update_guest(self):
+        """Make a synchronous call to update the guest agent."""
+        self._call("update_guest", AGENT_HIGH_TIMEOUT)
diff --git a/reddwarf/tests/fakes/guestagent.py b/reddwarf/tests/fakes/guestagent.py
index 387053a4b2..22b139cd51 100644
--- a/reddwarf/tests/fakes/guestagent.py
+++ b/reddwarf/tests/fakes/guestagent.py
@@ -44,6 +44,10 @@ class FakeGuest(object):
             'threads': 2
         }
 
+    def update_guest(self):
+        LOG.debug("Updating guest %s" % self.id)
+        self.version += 1
+
     def create_database(self, databases):
         for db in databases:
             self.dbs[db['_name']] = db