Merge from trunk, conflict resolution and merge prop fixes

28 files changed, 854 insertions, 125 deletions

diff --git a/nova/api/ec2/admin.py b/nova/api/ec2/admin.py
index e2a05fce1..d9a4ef999 100644
--- a/nova/api/ec2/admin.py
+++ b/nova/api/ec2/admin.py
@@ -29,7 +29,6 @@ from nova import flags
 from nova import log as logging
 from nova import utils
 from nova.auth import manager
-from nova.compute import instance_types
 
 
 FLAGS = flags.FLAGS
@@ -80,8 +79,8 @@ def host_dict(host, compute_service, instances, volume_service, volumes, now):
     return rv
 
 
-def instance_dict(name, inst):
-    return {'name': name,
+def instance_dict(inst):
+    return {'name': inst['name'],
             'memory_mb': inst['memory_mb'],
             'vcpus': inst['vcpus'],
             'disk_gb': inst['local_gb'],
@@ -115,9 +114,9 @@ class AdminController(object):
     def __str__(self):
         return 'AdminController'
 
-    def describe_instance_types(self, _context, **_kwargs):
-        return {'instanceTypeSet': [instance_dict(n, v) for n, v in
-                                    instance_types.INSTANCE_TYPES.iteritems()]}
+    def describe_instance_types(self, context, **_kwargs):
+        """Returns all active instance types data (vcpus, memory, etc.)"""
+        return {'instanceTypeSet': [db.instance_type_get_all(context)]}
 
     def describe_user(self, _context, name, **_kwargs):
         """Returns user data, including access and secret keys."""
diff --git a/nova/api/ec2/cloud.py b/nova/api/ec2/cloud.py
index 844ccbe5e..c6309f03c 100644
--- a/nova/api/ec2/cloud.py
+++ b/nova/api/ec2/cloud.py
@@ -298,7 +298,7 @@ class CloudController(object):
                     'keyFingerprint': key_pair['fingerprint'],
                 })
 
-        return {'keypairsSet': result}
+        return {'keySet': result}
 
     def create_key_pair(self, context, key_name, **kwargs):
         LOG.audit(_("Create key pair %s"), key_name, context=context)
diff --git a/nova/api/openstack/__init__.py b/nova/api/openstack/__init__.py
index b1b38ed2d..274330e3b 100644
--- a/nova/api/openstack/__init__.py
+++ b/nova/api/openstack/__init__.py
@@ -74,12 +74,15 @@ class APIRouter(wsgi.Router):
         server_members = {'action': 'POST'}
         if FLAGS.allow_admin_api:
             LOG.debug(_("Including admin operations in API."))
+
             server_members['pause'] = 'POST'
             server_members['unpause'] = 'POST'
             server_members["diagnostics"] = "GET"
             server_members["actions"] = "GET"
             server_members['suspend'] = 'POST'
             server_members['resume'] = 'POST'
+            server_members['rescue'] = 'POST'
+            server_members['unrescue'] = 'POST'
             server_members['reset_network'] = 'POST'
             server_members['inject_network_info'] = 'POST'
 
diff --git a/nova/api/openstack/common.py b/nova/api/openstack/common.py
index 1dc3767e2..9f85c5c8a 100644
--- a/nova/api/openstack/common.py
+++ b/nova/api/openstack/common.py
@@ -15,6 +15,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import webob.exc
+
 from nova import exception
 
 
@@ -27,7 +29,8 @@ def limited(items, request, max_limit=1000):
                     GET variables. 'offset' is where to start in the list,
                     and 'limit' is the maximum number of items to return. If
                     'limit' is not specified, 0, or > max_limit, we default
-                    to max_limit.
+                    to max_limit. Negative values for either offset or limit
+                    will cause exc.HTTPBadRequest() exceptions to be raised.
     @kwarg max_limit: The maximum number of items to return from 'items'
     """
     try:
@@ -40,6 +43,9 @@ def limited(items, request, max_limit=1000):
     except ValueError:
         limit = max_limit
 
+    if offset < 0 or limit < 0:
+        raise webob.exc.HTTPBadRequest()
+
     limit = min(max_limit, limit or max_limit)
     range_end = offset + limit
     return items[offset:range_end]
diff --git a/nova/api/openstack/flavors.py b/nova/api/openstack/flavors.py
index f620d4107..f3d040ba3 100644
--- a/nova/api/openstack/flavors.py
+++ b/nova/api/openstack/flavors.py
@@ -17,6 +17,8 @@
 
 from webob import exc
 
+from nova import db
+from nova import context
 from nova.api.openstack import faults
 from nova.api.openstack import common
 from nova.compute import instance_types
@@ -39,19 +41,19 @@ class Controller(wsgi.Controller):
 
     def detail(self, req):
         """Return all flavors in detail."""
-        items = [self.show(req, id)['flavor'] for id in self._all_ids()]
-        items = common.limited(items, req)
+        items = [self.show(req, id)['flavor'] for id in self._all_ids(req)]
         return dict(flavors=items)
 
     def show(self, req, id):
         """Return data about the given flavor id."""
-        for name, val in instance_types.INSTANCE_TYPES.iteritems():
-            if val['flavorid'] == int(id):
-                item = dict(ram=val['memory_mb'], disk=val['local_gb'],
-                            id=val['flavorid'], name=name)
-                return dict(flavor=item)
+        ctxt = req.environ['nova.context']
+        values = db.instance_type_get_by_flavor_id(ctxt, id)
+        return dict(flavor=values)
         raise faults.Fault(exc.HTTPNotFound())
 
-    def _all_ids(self):
+    def _all_ids(self, req):
         """Return the list of all flavorids."""
-        return [i['flavorid'] for i in instance_types.INSTANCE_TYPES.values()]
+        ctxt = req.environ['nova.context']
+        inst_types = db.instance_type_get_all(ctxt)
+        flavor_ids = [inst_types[i]['flavorid'] for i in inst_types.keys()]
+        return sorted(flavor_ids)
diff --git a/nova/api/openstack/servers.py b/nova/api/openstack/servers.py
index 0c3176a11..ceb17c9e4 100644
--- a/nova/api/openstack/servers.py
+++ b/nova/api/openstack/servers.py
@@ -383,6 +383,28 @@ class Controller(wsgi.Controller):
             return faults.Fault(exc.HTTPUnprocessableEntity())
         return exc.HTTPAccepted()
 
+    def rescue(self, req, id):
+        """Permit users to rescue the server."""
+        context = req.environ["nova.context"]
+        try:
+            self.compute_api.rescue(context, id)
+        except:
+            readable = traceback.format_exc()
+            LOG.exception(_("compute.api::rescue %s"), readable)
+            return faults.Fault(exc.HTTPUnprocessableEntity())
+        return exc.HTTPAccepted()
+
+    def unrescue(self, req, id):
+        """Permit users to unrescue the server."""
+        context = req.environ["nova.context"]
+        try:
+            self.compute_api.unrescue(context, id)
+        except:
+            readable = traceback.format_exc()
+            LOG.exception(_("compute.api::unrescue %s"), readable)
+            return faults.Fault(exc.HTTPUnprocessableEntity())
+        return exc.HTTPAccepted()
+
     def get_ajax_console(self, req, id):
         """ Returns a url to an instance's ajaxterm console. """
         try:
diff --git a/nova/compute/api.py b/nova/compute/api.py
index fb7ef1aed..bfa5c7dba 100644
--- a/nova/compute/api.py
+++ b/nova/compute/api.py
@@ -88,9 +88,9 @@ class API(base.Base):
                availability_zone=None, user_data=None, metadata=[],
                onset_files=None):
         """Create the number of instances requested if quota and
-        other arguments check out ok.
-        """
-        type_data = instance_types.INSTANCE_TYPES[instance_type]
+        other arguments check out ok."""
+
+        type_data = instance_types.get_instance_type(instance_type)
         num_instances = quota.allowed_instances(context, max_count, type_data)
         if num_instances < min_count:
             pid = context.project_id
diff --git a/nova/compute/instance_types.py b/nova/compute/instance_types.py
index 7a2a5baa3..fa02a5dfa 100644
--- a/nova/compute/instance_types.py
+++ b/nova/compute/instance_types.py
@@ -4,6 +4,7 @@
 # Administrator of the National Aeronautics and Space Administration.
 # All Rights Reserved.
 # Copyright (c) 2010 Citrix Systems, Inc.
+# Copyright 2011 Ken Pepple
 #
 #    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
@@ -21,30 +22,120 @@
 The built-in instance properties.
 """
 
-from nova import flags
+from nova import context
+from nova import db
 from nova import exception
+from nova import flags
+from nova import log as logging
 
 FLAGS = flags.FLAGS
-INSTANCE_TYPES = {
-    'm1.tiny': dict(memory_mb=512, vcpus=1, local_gb=0, flavorid=1),
-    'm1.small': dict(memory_mb=2048, vcpus=1, local_gb=20, flavorid=2),
-    'm1.medium': dict(memory_mb=4096, vcpus=2, local_gb=40, flavorid=3),
-    'm1.large': dict(memory_mb=8192, vcpus=4, local_gb=80, flavorid=4),
-    'm1.xlarge': dict(memory_mb=16384, vcpus=8, local_gb=160, flavorid=5)}
+LOG = logging.getLogger('nova.instance_types')
+
+
+def create(name, memory, vcpus, local_gb, flavorid, swap=0,
+           rxtx_quota=0, rxtx_cap=0):
+    """Creates instance types / flavors
+       arguments: name memory vcpus local_gb flavorid swap rxtx_quota rxtx_cap
+    """
+    for option in [memory, vcpus, local_gb, flavorid]:
+        try:
+            int(option)
+        except ValueError:
+            raise exception.InvalidInputException(
+                    _("create arguments must be positive integers"))
+    if (int(memory) <= 0) or (int(vcpus) <= 0) or (int(local_gb) < 0):
+        raise exception.InvalidInputException(
+                _("create arguments must be positive integers"))
+
+    try:
+        db.instance_type_create(
+                context.get_admin_context(),
+                dict(name=name,
+                    memory_mb=memory,
+                    vcpus=vcpus,
+                    local_gb=local_gb,
+                    flavorid=flavorid,
+                    swap=swap,
+                    rxtx_quota=rxtx_quota,
+                    rxtx_cap=rxtx_cap))
+    except exception.DBError, e:
+        LOG.exception(_('DB error: %s' % e))
+        raise exception.ApiError(_("Cannot create instance type: %s" % name))
+
+
+def destroy(name):
+    """Marks instance types / flavors as deleted
+    arguments: name"""
+    if name == None:
+        raise exception.InvalidInputException(_("No instance type specified"))
+    else:
+        try:
+            db.instance_type_destroy(context.get_admin_context(), name)
+        except exception.NotFound:
+            LOG.exception(_('Instance type %s not found for deletion' % name))
+            raise exception.ApiError(_("Unknown instance type: %s" % name))
+
+
+def purge(name):
+    """Removes instance types / flavors from database
+    arguments: name"""
+    if name == None:
+        raise exception.InvalidInputException(_("No instance type specified"))
+    else:
+        try:
+            db.instance_type_purge(context.get_admin_context(), name)
+        except exception.NotFound:
+            LOG.exception(_('Instance type %s not found for purge' % name))
+            raise exception.ApiError(_("Unknown instance type: %s" % name))
+
+
+def get_all_types(inactive=0):
+    """Retrieves non-deleted instance_types.
+    Pass true as argument if you want deleted instance types returned also."""
+    return db.instance_type_get_all(context.get_admin_context(), inactive)
+
+
+def get_all_flavors():
+    """retrieves non-deleted flavors. alias for instance_types.get_all_types().
+    Pass true as argument if you want deleted instance types returned also."""
+    return get_all_types(context.get_admin_context())
+
+
+def get_instance_type(name):
+    """Retrieves single instance type by name"""
+    if name is None:
+        return FLAGS.default_instance_type
+    try:
+        ctxt = context.get_admin_context()
+        inst_type = db.instance_type_get_by_name(ctxt, name)
+        return inst_type
+    except exception.DBError:
+        raise exception.ApiError(_("Unknown instance type: %s" % name))
 
 
 def get_by_type(instance_type):
-    """Build instance data structure and save it to the data store."""
+    """retrieve instance type name"""
     if instance_type is None:
         return FLAGS.default_instance_type
-    if instance_type not in INSTANCE_TYPES:
-        raise exception.ApiError(_("Unknown instance type: %s") % \
-                                 instance_type, "Invalid")
-    return instance_type
+
+    try:
+        ctxt = context.get_admin_context()
+        inst_type = db.instance_type_get_by_name(ctxt, instance_type)
+        return inst_type['name']
+    except exception.DBError, e:
+        LOG.exception(_('DB error: %s' % e))
+        raise exception.ApiError(_("Unknown instance type: %s" %\
+                                    instance_type))
 
 
 def get_by_flavor_id(flavor_id):
-    for instance_type, details in INSTANCE_TYPES.iteritems():
-        if details['flavorid'] == int(flavor_id):
-            return instance_type
-    return FLAGS.default_instance_type
+    """retrieve instance type's name by flavor_id"""
+    if flavor_id is None:
+        return FLAGS.default_instance_type
+    try:
+        ctxt = context.get_admin_context()
+        flavor = db.instance_type_get_by_flavor_id(ctxt, flavor_id)
+        return flavor['name']
+    except exception.DBError, e:
+        LOG.exception(_('DB error: %s' % e))
+        raise exception.ApiError(_("Unknown flavor: %s" % flavor_id))
diff --git a/nova/compute/manager.py b/nova/compute/manager.py
index 0f61e6cdd..1c42b383c 100644
--- a/nova/compute/manager.py
+++ b/nova/compute/manager.py
@@ -370,12 +370,19 @@ class ComputeManager(manager.Manager):
         context = context.elevated()
         instance_ref = self.db.instance_get(context, instance_id)
         LOG.audit(_('instance %s: rescuing'), instance_id, context=context)
-        self.db.instance_set_state(context,
-                                   instance_id,
-                                   power_state.NOSTATE,
-                                   'rescuing')
+        self.db.instance_set_state(
+            context,
+            instance_id,
+            power_state.NOSTATE,
+            'rescuing')
         self.network_manager.setup_compute_network(context, instance_id)
-        self.driver.rescue(instance_ref)
+        self.driver.rescue(
+            instance_ref,
+            lambda result: self._update_state_callback(
+                self,
+                context,
+                instance_id,
+                result))
         self._update_state(context, instance_id)
 
     @exception.wrap_exception
@@ -385,11 +392,18 @@ class ComputeManager(manager.Manager):
         context = context.elevated()
         instance_ref = self.db.instance_get(context, instance_id)
         LOG.audit(_('instance %s: unrescuing'), instance_id, context=context)
-        self.db.instance_set_state(context,
-                                   instance_id,
-                                   power_state.NOSTATE,
-                                   'unrescuing')
-        self.driver.unrescue(instance_ref)
+        self.db.instance_set_state(
+            context,
+            instance_id,
+            power_state.NOSTATE,
+            'unrescuing')
+        self.driver.unrescue(
+            instance_ref,
+            lambda result: self._update_state_callback(
+                self,
+                context,
+                instance_id,
+                result))
         self._update_state(context, instance_id)
 
     @staticmethod
@@ -417,7 +431,7 @@ class ComputeManager(manager.Manager):
 
         #TODO(mdietz): we may want to split these into separate methods.
         if migration_ref['source_compute'] == FLAGS.host:
-            self.driver.power_on(instance_ref)
+            self.driver._start(instance_ref)
             self.db.migration_update(context, migration_id,
                     {'status': 'reverted'})
         else:
diff --git a/nova/db/api.py b/nova/db/api.py
index 6076118f7..2ecfc0211 100644
--- a/nova/db/api.py
+++ b/nova/db/api.py
@@ -1034,6 +1034,41 @@ def console_get(context, console_id, instance_id=None):
     return IMPL.console_get(context, console_id, instance_id)
 
 
+    ##################
+
+
+def instance_type_create(context, values):
+    """Create a new instance type"""
+    return IMPL.instance_type_create(context, values)
+
+
+def instance_type_get_all(context, inactive=0):
+    """Get all instance types"""
+    return IMPL.instance_type_get_all(context, inactive)
+
+
+def instance_type_get_by_name(context, name):
+    """Get instance type by name"""
+    return IMPL.instance_type_get_by_name(context, name)
+
+
+def instance_type_get_by_flavor_id(context, id):
+    """Get instance type by name"""
+    return IMPL.instance_type_get_by_flavor_id(context, id)
+
+
+def instance_type_destroy(context, name):
+    """Delete a instance type"""
+    return IMPL.instance_type_destroy(context, name)
+
+
+def instance_type_purge(context, name):
+    """Purges (removes) an instance type from DB
+       Use instance_type_destroy for most cases
+    """
+    return IMPL.instance_type_purge(context, name)
+
+
 ####################
 
 
diff --git a/nova/db/sqlalchemy/api.py b/nova/db/sqlalchemy/api.py
index 421067e03..5e498fc6f 100644
--- a/nova/db/sqlalchemy/api.py
+++ b/nova/db/sqlalchemy/api.py
@@ -2129,6 +2129,98 @@ def console_get(context, console_id, instance_id=None):
     return result
 
 
+    ##################
+
+
+@require_admin_context
+def instance_type_create(_context, values):
+    try:
+        instance_type_ref = models.InstanceTypes()
+        instance_type_ref.update(values)
+        instance_type_ref.save()
+    except:
+        raise exception.DBError
+    return instance_type_ref
+
+
+@require_context
+def instance_type_get_all(context, inactive=0):
+    """
+    Returns a dict describing all instance_types with name as key.
+    """
+    session = get_session()
+    if inactive:
+        inst_types = session.query(models.InstanceTypes).\
+                        order_by("name").\
+                        all()
+    else:
+        inst_types = session.query(models.InstanceTypes).\
+                        filter_by(deleted=inactive).\
+                        order_by("name").\
+                        all()
+    if inst_types:
+        inst_dict = {}
+        for i in inst_types:
+            inst_dict[i['name']] = dict(i)
+        return inst_dict
+    else:
+        raise exception.NotFound
+
+
+@require_context
+def instance_type_get_by_name(context, name):
+    """Returns a dict describing specific instance_type"""
+    session = get_session()
+    inst_type = session.query(models.InstanceTypes).\
+                    filter_by(name=name).\
+                    first()
+    if not inst_type:
+        raise exception.NotFound(_("No instance type with name %s") % name)
+    else:
+        return dict(inst_type)
+
+
+@require_context
+def instance_type_get_by_flavor_id(context, id):
+    """Returns a dict describing specific flavor_id"""
+    session = get_session()
+    inst_type = session.query(models.InstanceTypes).\
+                                    filter_by(flavorid=int(id)).\
+                                    first()
+    if not inst_type:
+        raise exception.NotFound(_("No flavor with name %s") % id)
+    else:
+        return dict(inst_type)
+
+
+@require_admin_context
+def instance_type_destroy(context, name):
+    """ Marks specific instance_type as deleted"""
+    session = get_session()
+    instance_type_ref = session.query(models.InstanceTypes).\
+                                      filter_by(name=name)
+    records = instance_type_ref.update(dict(deleted=1))
+    if records == 0:
+        raise exception.NotFound
+    else:
+        return instance_type_ref
+
+
+@require_admin_context
+def instance_type_purge(context, name):
+    """ Removes specific instance_type from DB
+        Usually instance_type_destroy should be used
+    """
+    session = get_session()
+    instance_type_ref = session.query(models.InstanceTypes).\
+                                      filter_by(name=name)
+    records = instance_type_ref.delete()
+    if records == 0:
+        raise exception.NotFound
+    else:
+        return instance_type_ref
+
+
 ####################
 
 
diff --git a/nova/db/sqlalchemy/migrate_repo/versions/007_add_ipv6_to_fixed_ips.py b/nova/db/sqlalchemy/migrate_repo/versions/007_add_ipv6_to_fixed_ips.py
new file mode 100644
index 000000000..427934d53
--- /dev/null
+++ b/nova/db/sqlalchemy/migrate_repo/versions/007_add_ipv6_to_fixed_ips.py
@@ -0,0 +1,90 @@
+# Copyright 2011 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.
+
+from sqlalchemy import *
+from migrate import *
+
+from nova import log as logging
+
+
+meta = MetaData()
+
+
+# Table stub-definitions
+# Just for the ForeignKey and column creation to succeed, these are not the
+# actual definitions of instances or services.
+#
+fixed_ips = Table(
+    "fixed_ips",
+    meta,
+    Column(
+        "id",
+        Integer(),
+        primary_key=True,
+        nullable=False))
+
+#
+# New Tables
+#
+# None
+
+#
+# Tables to alter
+#
+# None
+
+#
+# Columns to add to existing tables
+#
+
+fixed_ips_addressV6 = Column(
+    "addressV6",
+    String(
+        length=255,
+        convert_unicode=False,
+        assert_unicode=None,
+        unicode_error=None,
+        _warn_on_bytestring=False))
+
+
+fixed_ips_netmaskV6 = Column(
+    "netmaskV6",
+    String(
+        length=3,
+        convert_unicode=False,
+        assert_unicode=None,
+        unicode_error=None,
+        _warn_on_bytestring=False))
+
+
+fixed_ips_gatewayV6 = Column(
+    "gatewayV6",
+    String(
+        length=255,
+        convert_unicode=False,
+        assert_unicode=None,
+        unicode_error=None,
+        _warn_on_bytestring=False))
+
+
+def upgrade(migrate_engine):
+    # Upgrade operations go here. Don't create your own engine;
+    # bind migrate_engine to your metadata
+    meta.bind = migrate_engine
+
+    # Add columns to existing tables
+    fixed_ips.create_column(fixed_ips_addressV6)
+    fixed_ips.create_column(fixed_ips_netmaskV6)
+    fixed_ips.create_column(fixed_ips_gatewayV6)
diff --git a/nova/db/sqlalchemy/migrate_repo/versions/008_add_instance_types.py b/nova/db/sqlalchemy/migrate_repo/versions/008_add_instance_types.py
new file mode 100644
index 000000000..66609054e
--- /dev/null
+++ b/nova/db/sqlalchemy/migrate_repo/versions/008_add_instance_types.py
@@ -0,0 +1,87 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2011 Ken Pepple
+#    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 sqlalchemy import *
+from migrate import *
+
+from nova import api
+from nova import db
+from nova import log as logging
+
+import datetime
+
+meta = MetaData()
+
+
+#
+# New Tables
+#
+instance_types = Table('instance_types', meta,
+        Column('created_at', DateTime(timezone=False)),
+        Column('updated_at', DateTime(timezone=False)),
+        Column('deleted_at', DateTime(timezone=False)),
+        Column('deleted', Boolean(create_constraint=True, name=None)),
+        Column('name',
+               String(length=255, convert_unicode=False, assert_unicode=None,
+                      unicode_error=None, _warn_on_bytestring=False),
+                      unique=True),
+        Column('id', Integer(),  primary_key=True, nullable=False),
+        Column('memory_mb', Integer(),  nullable=False),
+        Column('vcpus', Integer(),  nullable=False),
+        Column('local_gb', Integer(),  nullable=False),
+        Column('flavorid', Integer(),  nullable=False, unique=True),
+        Column('swap', Integer(),  nullable=False, default=0),
+        Column('rxtx_quota', Integer(),  nullable=False, default=0),
+        Column('rxtx_cap', Integer(),  nullable=False, default=0))
+
+
+def upgrade(migrate_engine):
+    # Upgrade operations go here
+    # Don't create your own engine; bind migrate_engine
+    # to your metadata
+    meta.bind = migrate_engine
+    try:
+        instance_types.create()
+    except Exception:
+        logging.info(repr(table))
+        logging.exception('Exception while creating instance_types table')
+        raise
+
+    # Here are the old static instance types
+    INSTANCE_TYPES = {
+    'm1.tiny': dict(memory_mb=512, vcpus=1, local_gb=0, flavorid=1),
+    'm1.small': dict(memory_mb=2048, vcpus=1, local_gb=20, flavorid=2),
+    'm1.medium': dict(memory_mb=4096, vcpus=2, local_gb=40, flavorid=3),
+    'm1.large': dict(memory_mb=8192, vcpus=4, local_gb=80, flavorid=4),
+    'm1.xlarge': dict(memory_mb=16384, vcpus=8, local_gb=160, flavorid=5)}
+    try:
+        i = instance_types.insert()
+        for name, values in INSTANCE_TYPES.iteritems():
+            # FIXME(kpepple) should we be seeding created_at / updated_at ?
+            # now = datetime.datatime.utcnow()
+            i.execute({'name': name, 'memory_mb': values["memory_mb"],
+                        'vcpus': values["vcpus"], 'deleted': 0,
+                        'local_gb': values["local_gb"],
+                        'flavorid': values["flavorid"]})
+    except Exception:
+        logging.info(repr(table))
+        logging.exception('Exception while seeding instance_types table')
+        raise
+
+
+def downgrade(migrate_engine):
+    # Operations to reverse the above upgrade go here.
+    for table in (instance_types):
+        table.drop()
diff --git a/nova/db/sqlalchemy/models.py b/nova/db/sqlalchemy/models.py
index 680d13584..6ef284e65 100644
--- a/nova/db/sqlalchemy/models.py
+++ b/nova/db/sqlalchemy/models.py
@@ -126,11 +126,16 @@ class Certificate(BASE, NovaBase):
 class Instance(BASE, NovaBase):
     """Represents a guest vm."""
     __tablename__ = 'instances'
+    onset_files = []
+
     id = Column(Integer, primary_key=True, autoincrement=True)
 
     @property
     def name(self):
-        return FLAGS.instance_name_template % self.id
+        base_name = FLAGS.instance_name_template % self.id
+        if getattr(self, '_rescue', False):
+            base_name += "-rescue"
+        return base_name
 
     admin_pass = Column(String(255))
     user_id = Column(String(255))
@@ -210,6 +215,20 @@ class InstanceActions(BASE, NovaBase):
     error = Column(Text)
 
 
+class InstanceTypes(BASE, NovaBase):
+    """Represent possible instance_types or flavor of VM offered"""
+    __tablename__ = "instance_types"
+    id = Column(Integer, primary_key=True)
+    name = Column(String(255), unique=True)
+    memory_mb = Column(Integer)
+    vcpus = Column(Integer)
+    local_gb = Column(Integer)
+    flavorid = Column(Integer, unique=True)
+    swap = Column(Integer, nullable=False, default=0)
+    rxtx_quota = Column(Integer, nullable=False, default=0)
+    rxtx_cap = Column(Integer, nullable=False, default=0)
+
+
 class Volume(BASE, NovaBase):
     """Represents a block storage device that can be attached to a vm."""
     __tablename__ = 'volumes'
@@ -449,6 +468,9 @@ class FixedIp(BASE, NovaBase):
     allocated = Column(Boolean, default=False)
     leased = Column(Boolean, default=False)
     reserved = Column(Boolean, default=False)
+    addressV6 = Column(String(255))
+    netmaskV6 = Column(String(3))
+    gatewayV6 = Column(String(255))
 
 
 class User(BASE, NovaBase):
@@ -583,7 +605,7 @@ def register_models():
     connection is lost and needs to be reestablished.
     """
     from sqlalchemy import create_engine
-    models = (Service, Instance, InstanceActions,
+    models = (Service, Instance, InstanceActions, InstanceTypes,
               Volume, ExportDevice, IscsiTarget, FixedIp, FloatingIp,
               Network, SecurityGroup, SecurityGroupIngressRule,
               SecurityGroupInstanceAssociation, AuthToken, User,
diff --git a/nova/network/manager.py b/nova/network/manager.py
index 500f2a1e8..b36dd59cf 100644
--- a/nova/network/manager.py
+++ b/nova/network/manager.py
@@ -531,6 +531,11 @@ class VlanManager(NetworkManager):
                                ' than 4094'))
 
         fixed_net = IPy.IP(cidr)
+        if fixed_net.len() < num_networks * network_size:
+            raise ValueError(_('The network range is not big enough to fit '
+                  '%(num_networks)s. Network size is %(network_size)s' %
+                  locals()))
+
         fixed_net_v6 = IPy.IP(cidr_v6)
         network_size_v6 = 1 << 64
         significant_bits_v6 = 64
diff --git a/nova/tests/api/openstack/test_common.py b/nova/tests/api/openstack/test_common.py
index 59d850157..92023362c 100644
--- a/nova/tests/api/openstack/test_common.py
+++ b/nova/tests/api/openstack/test_common.py
@@ -19,6 +19,7 @@
 Test suites for 'common' code used throughout the OpenStack HTTP API.
 """
 
+import webob.exc
 
 from webob import Request
 
@@ -160,3 +161,23 @@ class LimiterTest(test.TestCase):
         self.assertEqual(limited(items, req, max_limit=2000), items[3:])
         req = Request.blank('/?offset=3000&limit=10')
         self.assertEqual(limited(items, req, max_limit=2000), [])
+
+    def test_limiter_negative_limit(self):
+        """
+        Test a negative limit.
+        """
+        def _limit_large():
+            limited(self.large, req, max_limit=2000)
+
+        req = Request.blank('/?limit=-3000')
+        self.assertRaises(webob.exc.HTTPBadRequest, _limit_large)
+
+    def test_limiter_negative_offset(self):
+        """
+        Test a negative offset.
+        """
+        def _limit_large():
+            limited(self.large, req, max_limit=2000)
+
+        req = Request.blank('/?offset=-30')
+        self.assertRaises(webob.exc.HTTPBadRequest, _limit_large)
diff --git a/nova/tests/api/openstack/test_flavors.py b/nova/tests/api/openstack/test_flavors.py
index 761265965..319767bb5 100644
--- a/nova/tests/api/openstack/test_flavors.py
+++ b/nova/tests/api/openstack/test_flavors.py
@@ -20,6 +20,8 @@ import webob
 
 from nova import test
 import nova.api
+from nova import context
+from nova import db
 from nova.api.openstack import flavors
 from nova.tests.api.openstack import fakes
 
@@ -33,6 +35,7 @@ class FlavorsTest(test.TestCase):
         fakes.stub_out_networking(self.stubs)
         fakes.stub_out_rate_limiting(self.stubs)
         fakes.stub_out_auth(self.stubs)
+        self.context = context.get_admin_context()
 
     def tearDown(self):
         self.stubs.UnsetAll()
@@ -41,6 +44,9 @@ class FlavorsTest(test.TestCase):
     def test_get_flavor_list(self):
         req = webob.Request.blank('/v1.0/flavors')
         res = req.get_response(fakes.wsgi_app())
+        self.assertEqual(res.status_int, 200)
 
     def test_get_flavor_by_id(self):
-        pass
+        req = webob.Request.blank('/v1.0/flavors/1')
+        res = req.get_response(fakes.wsgi_app())
+        self.assertEqual(res.status_int, 200)
diff --git a/nova/tests/db/fakes.py b/nova/tests/db/fakes.py
index 05bdd172e..d760dc456 100644
--- a/nova/tests/db/fakes.py
+++ b/nova/tests/db/fakes.py
@@ -20,13 +20,22 @@
 import time
 
 from nova import db
+from nova import test
 from nova import utils
-from nova.compute import instance_types
 
 
 def stub_out_db_instance_api(stubs):
     """ Stubs out the db API for creating Instances """
 
+    INSTANCE_TYPES = {
+        'm1.tiny': dict(memory_mb=512, vcpus=1, local_gb=0, flavorid=1),
+        'm1.small': dict(memory_mb=2048, vcpus=1, local_gb=20, flavorid=2),
+        'm1.medium':
+            dict(memory_mb=4096, vcpus=2, local_gb=40, flavorid=3),
+        'm1.large': dict(memory_mb=8192, vcpus=4, local_gb=80, flavorid=4),
+        'm1.xlarge':
+            dict(memory_mb=16384, vcpus=8, local_gb=160, flavorid=5)}
+
     class FakeModel(object):
         """ Stubs out for model """
         def __init__(self, values):
@@ -41,10 +50,16 @@ def stub_out_db_instance_api(stubs):
             else:
                 raise NotImplementedError()
 
+    def fake_instance_type_get_all(context, inactive=0):
+        return INSTANCE_TYPES
+
+    def fake_instance_type_get_by_name(context, name):
+        return INSTANCE_TYPES[name]
+
     def fake_instance_create(values):
         """ Stubs out the db.instance_create method """
 
-        type_data = instance_types.INSTANCE_TYPES[values['instance_type']]
+        type_data = INSTANCE_TYPES[values['instance_type']]
 
         base_options = {
             'name': values['name'],
@@ -73,3 +88,5 @@ def stub_out_db_instance_api(stubs):
 
     stubs.Set(db, 'instance_create', fake_instance_create)
     stubs.Set(db, 'network_get_by_instance', fake_network_get_by_instance)
+    stubs.Set(db, 'instance_type_get_all', fake_instance_type_get_all)
+    stubs.Set(db, 'instance_type_get_by_name', fake_instance_type_get_by_name)
diff --git a/nova/tests/test_cloud.py b/nova/tests/test_cloud.py
index 061910013..b195fa520 100644
--- a/nova/tests/test_cloud.py
+++ b/nova/tests/test_cloud.py
@@ -267,7 +267,7 @@ class CloudTestCase(test.TestCase):
         self._create_key('test1')
         self._create_key('test2')
         result = self.cloud.describe_key_pairs(self.context)
-        keys = result["keypairsSet"]
+        keys = result["keySet"]
         self.assertTrue(filter(lambda k: k['keyName'] == 'test1', keys))
         self.assertTrue(filter(lambda k: k['keyName'] == 'test2', keys))
 
diff --git a/nova/tests/test_instance_types.py b/nova/tests/test_instance_types.py
new file mode 100644
index 000000000..edc538879
--- /dev/null
+++ b/nova/tests/test_instance_types.py
@@ -0,0 +1,86 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2011 Ken Pepple
+#    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.
+"""
+Unit Tests for instance types code
+"""
+import time
+
+from nova import context
+from nova import db
+from nova import exception
+from nova import flags
+from nova import log as logging
+from nova import test
+from nova import utils
+from nova.compute import instance_types
+from nova.db.sqlalchemy.session import get_session
+from nova.db.sqlalchemy import models
+
+FLAGS = flags.FLAGS
+LOG = logging.getLogger('nova.tests.compute')
+
+
+class InstanceTypeTestCase(test.TestCase):
+    """Test cases for instance type code"""
+    def setUp(self):
+        super(InstanceTypeTestCase, self).setUp()
+        session = get_session()
+        max_flavorid = session.query(models.InstanceTypes).\
+                                     order_by("flavorid desc").\
+                                     first()
+        self.flavorid = max_flavorid["flavorid"] + 1
+        self.name = str(int(time.time()))
+
+    def test_instance_type_create_then_delete(self):
+        """Ensure instance types can be created"""
+        starting_inst_list = instance_types.get_all_types()
+        instance_types.create(self.name, 256, 1, 120, self.flavorid)
+        new = instance_types.get_all_types()
+        self.assertNotEqual(len(starting_inst_list),
+                            len(new),
+                            'instance type was not created')
+        instance_types.destroy(self.name)
+        self.assertEqual(1,
+                    instance_types.get_instance_type(self.name)["deleted"])
+        self.assertEqual(starting_inst_list, instance_types.get_all_types())
+        instance_types.purge(self.name)
+        self.assertEqual(len(starting_inst_list),
+                         len(instance_types.get_all_types()),
+                         'instance type not purged')
+
+    def test_get_all_instance_types(self):
+        """Ensures that all instance types can be retrieved"""
+        session = get_session()
+        total_instance_types = session.query(models.InstanceTypes).\
+                                            count()
+        inst_types = instance_types.get_all_types()
+        self.assertEqual(total_instance_types, len(inst_types))
+
+    def test_invalid_create_args_should_fail(self):
+        """Ensures that instance type creation fails with invalid args"""
+        self.assertRaises(
+                exception.InvalidInputException,
+                instance_types.create, self.name, 0, 1, 120, self.flavorid)
+        self.assertRaises(
+                exception.InvalidInputException,
+                instance_types.create, self.name, 256, -1, 120, self.flavorid)
+        self.assertRaises(
+                exception.InvalidInputException,
+                instance_types.create, self.name, 256, 1, "aa", self.flavorid)
+
+    def test_non_existant_inst_type_shouldnt_delete(self):
+        """Ensures that instance type creation fails with invalid args"""
+        self.assertRaises(exception.ApiError,
+                          instance_types.destroy, "sfsfsdfdfs")
diff --git a/nova/tests/test_quota.py b/nova/tests/test_quota.py
index 1e42fddf3..4ecb36b54 100644
--- a/nova/tests/test_quota.py
+++ b/nova/tests/test_quota.py
@@ -74,19 +74,30 @@ class QuotaTestCase(test.TestCase):
         vol['size'] = size
         return db.volume_create(self.context, vol)['id']
 
+    def _get_instance_type(self, name):
+        instance_types = {
+            'm1.tiny': dict(memory_mb=512, vcpus=1, local_gb=0, flavorid=1),
+            'm1.small': dict(memory_mb=2048, vcpus=1, local_gb=20, flavorid=2),
+            'm1.medium':
+                dict(memory_mb=4096, vcpus=2, local_gb=40, flavorid=3),
+            'm1.large': dict(memory_mb=8192, vcpus=4, local_gb=80, flavorid=4),
+            'm1.xlarge':
+                dict(memory_mb=16384, vcpus=8, local_gb=160, flavorid=5)}
+        return instance_types[name]
+
     def test_quota_overrides(self):
         """Make sure overriding a projects quotas works"""
         num_instances = quota.allowed_instances(self.context, 100,
-            instance_types.INSTANCE_TYPES['m1.small'])
+            self._get_instance_type('m1.small'))
         self.assertEqual(num_instances, 2)
         db.quota_create(self.context, {'project_id': self.project.id,
                                        'instances': 10})
         num_instances = quota.allowed_instances(self.context, 100,
-            instance_types.INSTANCE_TYPES['m1.small'])
+            self._get_instance_type('m1.small'))
         self.assertEqual(num_instances, 4)
         db.quota_update(self.context, self.project.id, {'cores': 100})
         num_instances = quota.allowed_instances(self.context, 100,
-            instance_types.INSTANCE_TYPES['m1.small'])
+            self._get_instance_type('m1.small'))
         self.assertEqual(num_instances, 10)
 
         # metadata_items
diff --git a/nova/tests/test_xenapi.py b/nova/tests/test_xenapi.py
index 9e0e2b0db..7f437c2b8 100644
--- a/nova/tests/test_xenapi.py
+++ b/nova/tests/test_xenapi.py
@@ -233,7 +233,7 @@ class XenAPIVMTestCase(test.TestCase):
         vm = vms[0]
 
         # Check that m1.large above turned into the right thing.
-        instance_type = instance_types.INSTANCE_TYPES['m1.large']
+        instance_type = db.instance_type_get_by_name(conn, 'm1.large')
         mem_kib = long(instance_type['memory_mb']) << 10
         mem_bytes = str(mem_kib << 10)
         vcpus = instance_type['vcpus']
diff --git a/nova/tests/xenapi/stubs.py b/nova/tests/xenapi/stubs.py
index ddb7ad6db..d17951b81 100644
--- a/nova/tests/xenapi/stubs.py
+++ b/nova/tests/xenapi/stubs.py
@@ -28,7 +28,7 @@ def stubout_instance_snapshot(stubs):
     def fake_fetch_image(cls, session, instance_id, image, user, project,
                          type):
         # Stubout wait_for_task
-        def fake_wait_for_task(self, id, task):
+        def fake_wait_for_task(self, task, id):
             class FakeEvent:
 
                 def send(self, value):
diff --git a/nova/virt/libvirt_conn.py b/nova/virt/libvirt_conn.py
index 4e0fd106f..9f7315c17 100644
--- a/nova/virt/libvirt_conn.py
+++ b/nova/virt/libvirt_conn.py
@@ -55,6 +55,7 @@ from nova import db
 from nova import exception
 from nova import flags
 from nova import log as logging
+#from nova import test
 from nova import utils
 #from nova.api import context
 from nova.auth import manager
@@ -362,7 +363,7 @@ class LibvirtConnection(object):
         raise exception.APIError("resume not supported for libvirt")
 
     @exception.wrap_exception
-    def rescue(self, instance):
+    def rescue(self, instance, callback=None):
         self.destroy(instance, False)
 
         xml = self.to_xml(instance, rescue=True)
@@ -392,7 +393,7 @@ class LibvirtConnection(object):
         return timer.start(interval=0.5, now=True)
 
     @exception.wrap_exception
-    def unrescue(self, instance):
+    def unrescue(self, instance, callback=None):
         # NOTE(vish): Because reboot destroys and recreates an instance using
         #             the normal xml file, we can just call reboot here
         self.reboot(instance)
@@ -606,7 +607,7 @@ class LibvirtConnection(object):
                           user=user,
                           project=project,
                           size=size)
-        type_data = instance_types.INSTANCE_TYPES[inst['instance_type']]
+        type_data = instance_types.get_instance_type(inst['instance_type'])
 
         if type_data['local_gb']:
             self._cache_image(fn=self._create_local,
@@ -667,7 +668,8 @@ class LibvirtConnection(object):
                                              instance['id'])
         # FIXME(vish): stick this in db
         instance_type = instance['instance_type']
-        instance_type = instance_types.INSTANCE_TYPES[instance_type]
+        # instance_type = test.INSTANCE_TYPES[instance_type]
+        instance_type = instance_types.get_instance_type(instance_type)
         ip_address = db.instance_get_fixed_address(context.get_admin_context(),
                                                    instance['id'])
         # Assume that the gateway also acts as the dhcp server.
diff --git a/nova/virt/xenapi/vm_utils.py b/nova/virt/xenapi/vm_utils.py
index 3ee963fa7..ca2d634f1 100644
--- a/nova/virt/xenapi/vm_utils.py
+++ b/nova/virt/xenapi/vm_utils.py
@@ -86,7 +86,8 @@ class VMHelper(HelperBase):
         the pv_kernel flag indicates whether the guest is HVM or PV
         """
 
-        instance_type = instance_types.INSTANCE_TYPES[instance.instance_type]
+        instance_type = instance_types.\
+                                get_instance_type(instance.instance_type)
         mem = str(long(instance_type['memory_mb']) * 1024 * 1024)
         vcpus = str(instance_type['vcpus'])
         rec = {
@@ -144,7 +145,8 @@ class VMHelper(HelperBase):
 
     @classmethod
     def ensure_free_mem(cls, session, instance):
-        instance_type = instance_types.INSTANCE_TYPES[instance.instance_type]
+        instance_type = instance_types.get_instance_type(
+            instance.instance_type)
         mem = long(instance_type['memory_mb']) * 1024 * 1024
         #get free memory from host
         host = session.get_xenapi_host()
@@ -205,19 +207,17 @@ class VMHelper(HelperBase):
         """Destroy VBD from host database"""
         try:
             task = session.call_xenapi('Async.VBD.destroy', vbd_ref)
-            #FIXME(armando): find a solution to missing instance_id
-            #with Josh Kearney
-            session.wait_for_task(0, task)
+            session.wait_for_task(task)
         except cls.XenAPI.Failure, exc:
             LOG.exception(exc)
             raise StorageError(_('Unable to destroy VBD %s') % vbd_ref)
 
     @classmethod
-    def create_vif(cls, session, vm_ref, network_ref, mac_address):
+    def create_vif(cls, session, vm_ref, network_ref, mac_address, dev="0"):
         """Create a VIF record.  Returns a Deferred that gives the new
         VIF reference."""
         vif_rec = {}
-        vif_rec['device'] = '0'
+        vif_rec['device'] = dev
         vif_rec['network'] = network_ref
         vif_rec['VM'] = vm_ref
         vif_rec['MAC'] = mac_address
@@ -330,7 +330,7 @@ class VMHelper(HelperBase):
 
         kwargs = {'params': pickle.dumps(params)}
         task = session.async_call_plugin('glance', 'upload_vhd', kwargs)
-        session.wait_for_task(instance_id, task)
+        session.wait_for_task(task, instance_id)
 
     @classmethod
     def fetch_image(cls, session, instance_id, image, user, project,
@@ -373,9 +373,9 @@ class VMHelper(HelperBase):
 
         kwargs = {'params': pickle.dumps(params)}
         task = session.async_call_plugin('glance', 'download_vhd', kwargs)
-        vdi_uuid = session.wait_for_task(instance_id, task)
+        vdi_uuid = session.wait_for_task(task, instance_id)
 
-        scan_sr(session, instance_id, sr_ref)
+        cls.scan_sr(session, instance_id, sr_ref)
 
         # Set the name-label to ease debugging
         vdi_ref = session.get_xenapi().VDI.get_by_uuid(vdi_uuid)
@@ -429,7 +429,7 @@ class VMHelper(HelperBase):
             #let the plugin copy the correct number of bytes
             args['image-size'] = str(vdi_size)
             task = session.async_call_plugin('glance', fn, args)
-            filename = session.wait_for_task(instance_id, task)
+            filename = session.wait_for_task(task, instance_id)
             #remove the VDI as it is not needed anymore
             session.get_xenapi().VDI.destroy(vdi)
             LOG.debug(_("Kernel/Ramdisk VDI %s destroyed"), vdi)
@@ -521,7 +521,7 @@ class VMHelper(HelperBase):
             if image_type == ImageType.DISK_RAW:
                 args['raw'] = 'true'
         task = session.async_call_plugin('objectstore', fn, args)
-        uuid = session.wait_for_task(instance_id, task)
+        uuid = session.wait_for_task(task, instance_id)
         return uuid
 
     @classmethod
@@ -541,7 +541,7 @@ class VMHelper(HelperBase):
         args = {}
         args['vdi-ref'] = vdi_ref
         task = session.async_call_plugin('objectstore', fn, args)
-        pv_str = session.wait_for_task(instance_id, task)
+        pv_str = session.wait_for_task(task, instance_id)
         pv = None
         if pv_str.lower() == 'true':
             pv = True
diff --git a/nova/virt/xenapi/vmops.py b/nova/virt/xenapi/vmops.py
index b54084842..60ce51f4a 100644
--- a/nova/virt/xenapi/vmops.py
+++ b/nova/virt/xenapi/vmops.py
@@ -50,6 +50,7 @@ class VMOps(object):
     def __init__(self, session):
         self.XenAPI = session.get_imported_xenapi()
         self._session = session
+
         VMHelper.XenAPI = self.XenAPI
 
     def list_instances(self):
@@ -61,31 +62,32 @@ class VMOps(object):
                 vms.append(rec["name_label"])
         return vms
 
-    def power_on(self, instance):
+    def _start(self, instance, vm_ref=None):
         """Power on a VM instance"""
-        vm = VMHelper.lookup(self._session, instance.name)
-        if vm is  None:
+        if not vm_ref:
+            vm_ref = VMHelper.lookup(self._session, instance.name)
+        if vm_ref is None:
             raise exception(_('Attempted to power on non-existent instance'
             ' bad instance id %s') % instance.id)
         LOG.debug(_("Starting instance %s"), instance.name)
-        self._session.call_xenapi('VM.start', vm, False, False)
+        self._session.call_xenapi('VM.start', vm_ref, False, False)
 
     def spawn(self, instance, disk):
         """Create VM instance"""
-        vm = VMHelper.lookup(self._session, instance.name)
+        instance_name = instance.name
+        vm = VMHelper.lookup(self._session, instance_name)
         if vm is not None:
             raise exception.Duplicate(_('Attempted to create'
-            ' non-unique name %s') % instance.name)
+            ' non-unique name %s') % instance_name)
 
         #ensure enough free memory is available
         if not VMHelper.ensure_free_mem(self._session, instance):
-                name = instance['name']
-                LOG.exception(_('instance %(name)s: not enough free memory')
-                              % locals())
-                db.instance_set_state(context.get_admin_context(),
-                                      instance['id'],
-                                      power_state.SHUTDOWN)
-                return
+            LOG.exception(_('instance %(instance_name)s: not enough free '
+                          'memory') % locals())
+            db.instance_set_state(context.get_admin_context(),
+                                  instance['id'],
+                                  power_state.SHUTDOWN)
+            return
 
         user = AuthManager().get_user(instance.user_id)
         project = AuthManager().get_project(instance.project_id)
@@ -131,10 +133,9 @@ class VMOps(object):
         self.create_vifs(instance, networks)
 
         LOG.debug(_('Starting VM %s...'), vm_ref)
-        self._session.call_xenapi('VM.start', vm_ref, False, False)
-        instance_name = instance.name
+        self._start(instance, vm_ref)
         LOG.info(_('Spawning VM %(instance_name)s created %(vm_ref)s.')
-                % locals())
+                 % locals())
 
         def _inject_onset_files():
             onset_files = instance.onset_files
@@ -158,18 +159,18 @@ class VMOps(object):
 
         def _wait_for_boot():
             try:
-                state = self.get_info(instance['name'])['state']
+                state = self.get_info(instance_name)['state']
                 db.instance_set_state(context.get_admin_context(),
                                       instance['id'], state)
                 if state == power_state.RUNNING:
-                    LOG.debug(_('Instance %s: booted'), instance['name'])
+                    LOG.debug(_('Instance %s: booted'), instance_name)
                     timer.stop()
                     _inject_onset_files()
                     return True
             except Exception, exc:
                 LOG.warn(exc)
                 LOG.exception(_('instance %s: failed to boot'),
-                              instance['name'])
+                              instance_name)
                 db.instance_set_state(context.get_admin_context(),
                                       instance['id'],
                                       power_state.SHUTDOWN)
@@ -217,6 +218,20 @@ class VMOps(object):
                             _('Instance not present %s') % instance_name)
         return vm
 
+    def _acquire_bootlock(self, vm):
+        """Prevent an instance from booting"""
+        self._session.call_xenapi(
+            "VM.set_blocked_operations",
+            vm,
+            {"start": ""})
+
+    def _release_bootlock(self, vm):
+        """Allow an instance to boot"""
+        self._session.call_xenapi(
+            "VM.remove_from_blocked_operations",
+            vm,
+            "start")
+
     def snapshot(self, instance, image_id):
         """ Create snapshot from a running VM instance
 
@@ -247,8 +262,8 @@ class VMOps(object):
                     self._session, instance.id, template_vdi_uuids, image_id)
         finally:
             if template_vm_ref:
-                self.virt._destroy(self.instance, template_vm_ref, shutdown=False,
-                        destroy_kernel_ramdisk=False)
+                self.virt._destroy(self.instance, template_vm_ref,
+                        shutdown=False, destroy_kernel_ramdisk=False)
 
         logging.debug(_("Finished snapshot and upload for VM %s"), instance)
 
@@ -315,8 +330,8 @@ class VMOps(object):
 
         finally:
             if template_vm_ref:
-                self.virt._destroy(self.instance, template_vm_ref, shutdown=False,
-                        destroy_kernel_ramdisk=False)
+                self.virt._destroy(self.instance, template_vm_ref,
+                        shutdown=False, destroy_kernel_ramdisk=False)
 
         # TODO(mdietz): we could also consider renaming these to something
         # sensible so we don't need to blindly pass around dictionaries
@@ -350,7 +365,7 @@ class VMOps(object):
         """Reboot VM instance"""
         vm = self._get_vm_opaque_ref(instance)
         task = self._session.call_xenapi('Async.VM.clean_reboot', vm)
-        self._session.wait_for_task(instance.id, task)
+        self._session.wait_for_task(task, instance.id)
 
     def set_admin_password(self, instance, new_pass):
         """Set the root/admin password on the VM instance. This is done via
@@ -417,7 +432,7 @@ class VMOps(object):
         return resp_dict['message']
 
     def _shutdown(self, instance, vm, hard=True):
-        """Shutdown an instance """
+        """Shutdown an instance"""
         state = self.get_info(instance['name'])['state']
         if state == power_state.SHUTDOWN:
             LOG.warn(_("VM %(vm)s already halted, skipping shutdown...") %
@@ -430,11 +445,10 @@ class VMOps(object):
         try:
             task = None
             if hard:
-                task = self._session.call_xenapi('Async.VM.hard_shutdown', vm)
+                task = self._session.call_xenapi("Async.VM.hard_shutdown", vm)
             else:
                 task = self._session.call_xenapi('Async.VM.clean_shutdown', vm)
-
-            self._session.wait_for_task(instance.id, task)
+            self._session.wait_for_task(task, instance.id)
         except self.XenAPI.Failure, exc:
             LOG.exception(exc)
 
@@ -451,7 +465,7 @@ class VMOps(object):
         for vdi in vdis:
             try:
                 task = self._session.call_xenapi('Async.VDI.destroy', vdi)
-                self._session.wait_for_task(instance.id, task)
+                self._session.wait_for_task(task, instance.id)
             except self.XenAPI.Failure, exc:
                 LOG.exception(exc)
 
@@ -490,7 +504,7 @@ class VMOps(object):
         args = {'kernel-file': kernel, 'ramdisk-file': ramdisk}
         task = self._session.async_call_plugin(
             'glance', 'remove_kernel_ramdisk', args)
-        self._session.wait_for_task(instance.id, task)
+        self._session.wait_for_task(task, instance.id)
 
         LOG.debug(_("kernel/ramdisk files removed"))
 
@@ -499,7 +513,7 @@ class VMOps(object):
         instance_id = instance.id
         try:
             task = self._session.call_xenapi('Async.VM.destroy', vm)
-            self._session.wait_for_task(instance_id, task)
+            self._session.wait_for_task(task, instance_id)
         except self.XenAPI.Failure, exc:
             LOG.exception(exc)
 
@@ -542,7 +556,7 @@ class VMOps(object):
     def _wait_with_callback(self, instance_id, task, callback):
         ret = None
         try:
-            ret = self._session.wait_for_task(instance_id, task)
+            ret = self._session.wait_for_task(task, instance_id)
         except self.XenAPI.Failure, exc:
             LOG.exception(exc)
         callback(ret)
@@ -571,6 +585,78 @@ class VMOps(object):
         task = self._session.call_xenapi('Async.VM.resume', vm, False, True)
         self._wait_with_callback(instance.id, task, callback)
 
+    def rescue(self, instance, callback):
+        """Rescue the specified instance
+            - shutdown the instance VM
+            - set 'bootlock' to prevent the instance from starting in rescue
+            - spawn a rescue VM (the vm name-label will be instance-N-rescue)
+
+        """
+        rescue_vm = VMHelper.lookup(self._session, instance.name + "-rescue")
+        if rescue_vm:
+            raise RuntimeError(_(
+                "Instance is already in Rescue Mode: %s" % instance.name))
+
+        vm = self._get_vm_opaque_ref(instance)
+        self._shutdown(instance, vm)
+        self._acquire_bootlock(vm)
+
+        instance._rescue = True
+        self.spawn(instance)
+        rescue_vm = self._get_vm_opaque_ref(instance)
+
+        vbd = self._session.get_xenapi().VM.get_VBDs(vm)[0]
+        vdi_ref = self._session.get_xenapi().VBD.get_record(vbd)["VDI"]
+        vbd_ref = VMHelper.create_vbd(
+            self._session,
+            rescue_vm,
+            vdi_ref,
+            1,
+            False)
+
+        self._session.call_xenapi("Async.VBD.plug", vbd_ref)
+
+    def unrescue(self, instance, callback):
+        """Unrescue the specified instance
+            - unplug the instance VM's disk from the rescue VM
+            - teardown the rescue VM
+            - release the bootlock to allow the instance VM to start
+
+        """
+        rescue_vm = VMHelper.lookup(self._session, instance.name + "-rescue")
+
+        if not rescue_vm:
+            raise exception.NotFound(_(
+                "Instance is not in Rescue Mode: %s" % instance.name))
+
+        original_vm = self._get_vm_opaque_ref(instance)
+        vbds = self._session.get_xenapi().VM.get_VBDs(rescue_vm)
+
+        instance._rescue = False
+
+        for vbd_ref in vbds:
+            vbd = self._session.get_xenapi().VBD.get_record(vbd_ref)
+            if vbd["userdevice"] == "1":
+                VMHelper.unplug_vbd(self._session, vbd_ref)
+                VMHelper.destroy_vbd(self._session, vbd_ref)
+
+        task1 = self._session.call_xenapi("Async.VM.hard_shutdown", rescue_vm)
+        self._session.wait_for_task(task1, instance.id)
+
+        vdis = VMHelper.lookup_vm_vdis(self._session, rescue_vm)
+        for vdi in vdis:
+            try:
+                task = self._session.call_xenapi('Async.VDI.destroy', vdi)
+                self._session.wait_for_task(task, instance.id)
+            except self.XenAPI.Failure:
+                continue
+
+        task2 = self._session.call_xenapi('Async.VM.destroy', rescue_vm)
+        self._session.wait_for_task(task2, instance.id)
+
+        self._release_bootlock(original_vm)
+        self._start(instance, original_vm)
+
     def get_info(self, instance):
         """Return data about VM instance"""
         vm = self._get_vm_opaque_ref(instance)
@@ -615,18 +701,30 @@ class VMOps(object):
             network_IPs = [ip for ip in IPs if ip.network_id == network.id]
 
             def ip_dict(ip):
-                return {'netmask': network['netmask'],
-                        'enabled': '1',
-                        'ip': ip.address}
+                return {
+                    "ip": ip.address,
+                    "netmask": network["netmask"],
+                    "enabled": "1"}
+
+            def ip6_dict(ip6):
+                return {
+                    "ip": ip6.addressV6,
+                    "netmask": ip6.netmaskV6,
+                    "gateway": ip6.gatewayV6,
+                    "enabled": "1"}
 
             mac_id = instance.mac_address.replace(':', '')
             location = 'vm-data/networking/%s' % mac_id
-            mapping = {'label': network['label'],
-                       'gateway': network['gateway'],
-                       'mac': instance.mac_address,
-                       'dns': [network['dns']],
-                       'ips': [ip_dict(ip) for ip in network_IPs]}
+            mapping = {
+                'label': network['label'],
+                'gateway': network['gateway'],
+                'mac': instance.mac_address,
+                'dns': [network['dns']],
+                'ips': [ip_dict(ip) for ip in network_IPs],
+                'ip6s': [ip6_dict(ip) for ip in network_IPs]}
+
             self.write_to_param_xenstore(vm_opaque_ref, {location: mapping})
+
             try:
                 self.write_to_xenstore(vm_opaque_ref, location,
                                                       mapping['location'])
@@ -657,8 +755,17 @@ class VMOps(object):
                 NetworkHelper.find_network_with_bridge(self._session, bridge)
 
             if network_ref:
-                VMHelper.create_vif(self._session, vm_opaque_ref,
-                                    network_ref, instance.mac_address)
+                try:
+                    device = "1" if instance._rescue else "0"
+                except AttributeError:
+                    device = "0"
+
+                VMHelper.create_vif(
+                    self._session,
+                    vm_opaque_ref,
+                    network_ref,
+                    instance.mac_address,
+                    device)
 
     def reset_network(self, instance):
         """
@@ -728,7 +835,7 @@ class VMOps(object):
         args.update(addl_args)
         try:
             task = self._session.async_call_plugin(plugin, method, args)
-            ret = self._session.wait_for_task(instance_id, task)
+            ret = self._session.wait_for_task(task, instance_id)
         except self.XenAPI.Failure, e:
             ret = None
             err_trace = e.details[-1]
diff --git a/nova/virt/xenapi/volumeops.py b/nova/virt/xenapi/volumeops.py
index d89a6f995..757ecf5ad 100644
--- a/nova/virt/xenapi/volumeops.py
+++ b/nova/virt/xenapi/volumeops.py
@@ -83,7 +83,7 @@ class VolumeOps(object):
                 try:
                     task = self._session.call_xenapi('Async.VBD.plug',
                                                            vbd_ref)
-                    self._session.wait_for_task(vol_rec['deviceNumber'], task)
+                    self._session.wait_for_task(task, vol_rec['deviceNumber'])
                 except self.XenAPI.Failure, exc:
                     LOG.exception(exc)
                     VolumeHelper.destroy_iscsi_storage(self._session,
diff --git a/nova/virt/xenapi_conn.py b/nova/virt/xenapi_conn.py
index f4fb609d7..62e17e851 100644
--- a/nova/virt/xenapi_conn.py
+++ b/nova/virt/xenapi_conn.py
@@ -209,6 +209,14 @@ class XenAPIConnection(object):
         """resume the specified instance"""
         self._vmops.resume(instance, callback)
 
+    def rescue(self, instance, callback):
+        """Rescue the specified instance"""
+        self._vmops.rescue(instance, callback)
+
+    def unrescue(self, instance, callback):
+        """Unrescue the specified instance"""
+        self._vmops.unrescue(instance, callback)
+
     def reset_network(self, instance):
         """reset networking for specified instance"""
         self._vmops.reset_network(instance)
@@ -296,7 +304,7 @@ class XenAPISession(object):
                              self._session.xenapi.Async.host.call_plugin,
                              self.get_xenapi_host(), plugin, fn, args)
 
-    def wait_for_task(self, id, task):
+    def wait_for_task(self, task, id=None):
         """Return the result of the given task. The task is polled
         until it completes. Not re-entrant."""
         done = event.Event()
@@ -323,10 +331,11 @@ class XenAPISession(object):
         try:
             name = self._session.xenapi.task.get_name_label(task)
             status = self._session.xenapi.task.get_status(task)
-            action = dict(
-                instance_id=int(id),
-                action=name[0:255],  # Ensure action is never > 255
-                error=None)
+            if id:
+                action = dict(
+                    instance_id=int(id),
+                    action=name[0:255],  # Ensure action is never > 255
+                    error=None)
             if status == "pending":
                 return
             elif status == "success":
@@ -340,7 +349,9 @@ class XenAPISession(object):
                 LOG.warn(_("Task [%(name)s] %(task)s status:"
                         " %(status)s    %(error_info)s") % locals())
                 done.send_exception(self.XenAPI.Failure(error_info))
-            db.instance_action_create(context.get_admin_context(), action)
+
+            if id:
+                db.instance_action_create(context.get_admin_context(), action)
         except self.XenAPI.Failure, exc:
             LOG.warn(exc)
             done.send_exception(*sys.exc_info())