diff --git a/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/027_quotas.py b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/027_quotas.py
new file mode 100644
index 000000000..8c95143c0
--- /dev/null
+++ b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/027_quotas.py
@@ -0,0 +1,124 @@
+#    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.
+"""API Database migrations for quotas"""
+
+from migrate import UniqueConstraint
+from sqlalchemy import Column
+from sqlalchemy import DateTime
+from sqlalchemy import ForeignKey
+from sqlalchemy import Index
+from sqlalchemy import Integer
+from sqlalchemy import MetaData
+from sqlalchemy import String
+from sqlalchemy import Table
+
+
+def upgrade(migrate_engine):
+    meta = MetaData()
+    meta.bind = migrate_engine
+
+    quota_classes = Table('quota_classes', meta,
+        Column('created_at', DateTime),
+        Column('updated_at', DateTime),
+        Column('id', Integer, primary_key=True, nullable=False),
+        Column('class_name', String(length=255)),
+        Column('resource', String(length=255)),
+        Column('hard_limit', Integer),
+        Index('quota_classes_class_name_idx', 'class_name'),
+        mysql_engine='InnoDB',
+        mysql_charset='utf8'
+    )
+
+    quota_classes.create(checkfirst=True)
+
+    quota_usages = Table('quota_usages', meta,
+        Column('created_at', DateTime),
+        Column('updated_at', DateTime),
+        Column('id', Integer, primary_key=True, nullable=False),
+        Column('project_id', String(length=255)),
+        Column('resource', String(length=255), nullable=False),
+        Column('in_use', Integer, nullable=False),
+        Column('reserved', Integer, nullable=False),
+        Column('until_refresh', Integer),
+        Column('user_id', String(length=255)),
+        Index('quota_usages_project_id_idx', 'project_id'),
+        Index('quota_usages_user_id_idx', 'user_id'),
+        mysql_engine='InnoDB',
+        mysql_charset='utf8'
+    )
+
+    quota_usages.create(checkfirst=True)
+
+    quotas = Table('quotas', meta,
+        Column('id', Integer, primary_key=True, nullable=False),
+        Column('created_at', DateTime),
+        Column('updated_at', DateTime),
+        Column('project_id', String(length=255)),
+        Column('resource', String(length=255), nullable=False),
+        Column('hard_limit', Integer),
+        UniqueConstraint('project_id', 'resource',
+                         name='uniq_quotas0project_id0resource'),
+        mysql_engine='InnoDB',
+        mysql_charset='utf8'
+    )
+
+    quotas.create(checkfirst=True)
+
+    uniq_name = "uniq_project_user_quotas0user_id0project_id0resource"
+    project_user_quotas = Table('project_user_quotas', meta,
+        Column('id', Integer, primary_key=True,
+               nullable=False),
+        Column('created_at', DateTime),
+        Column('updated_at', DateTime),
+        Column('user_id',
+               String(length=255),
+               nullable=False),
+        Column('project_id',
+               String(length=255),
+               nullable=False),
+        Column('resource',
+               String(length=255),
+               nullable=False),
+        Column('hard_limit', Integer, nullable=True),
+        UniqueConstraint('user_id', 'project_id', 'resource',
+                         name=uniq_name),
+        Index('project_user_quotas_project_id_idx',
+              'project_id'),
+        Index('project_user_quotas_user_id_idx',
+              'user_id'),
+        mysql_engine='InnoDB',
+        mysql_charset='utf8',
+    )
+
+    project_user_quotas.create(checkfirst=True)
+
+    reservations = Table('reservations', meta,
+        Column('created_at', DateTime),
+        Column('updated_at', DateTime),
+        Column('id', Integer, primary_key=True, nullable=False),
+        Column('uuid', String(length=36), nullable=False),
+        Column('usage_id', Integer, ForeignKey('quota_usages.id'),
+               nullable=False),
+        Column('project_id', String(length=255)),
+        Column('resource', String(length=255)),
+        Column('delta', Integer, nullable=False),
+        Column('expire', DateTime),
+        Column('user_id', String(length=255)),
+        Index('reservations_project_id_idx', 'project_id'),
+        Index('reservations_uuid_idx', 'uuid'),
+        Index('reservations_expire_idx', 'expire'),
+        Index('reservations_user_id_idx', 'user_id'),
+        mysql_engine='InnoDB',
+        mysql_charset='utf8'
+    )
+
+    reservations.create(checkfirst=True)
diff --git a/nova/db/sqlalchemy/api_models.py b/nova/db/sqlalchemy/api_models.py
index 9b1248397..970e7b6a4 100644
--- a/nova/db/sqlalchemy/api_models.py
+++ b/nova/db/sqlalchemy/api_models.py
@@ -14,6 +14,7 @@
 from oslo_db.sqlalchemy import models
 from sqlalchemy import Boolean
 from sqlalchemy import Column
+from sqlalchemy import DateTime
 from sqlalchemy.dialects.mysql import MEDIUMTEXT
 from sqlalchemy import Enum
 from sqlalchemy.ext.declarative import declarative_base
@@ -423,3 +424,121 @@ class InstanceGroup(API_BASE):
     @property
     def members(self):
         return [m.instance_uuid for m in self._members]
+
+
+class Quota(API_BASE):
+    """Represents a single quota override for a project.
+
+    If there is no row for a given project id and resource, then the
+    default for the quota class is used.  If there is no row for a
+    given quota class and resource, then the default for the
+    deployment is used. If the row is present but the hard limit is
+    Null, then the resource is unlimited.
+    """
+
+    __tablename__ = 'quotas'
+    __table_args__ = (
+        schema.UniqueConstraint("project_id", "resource",
+        name="uniq_quotas0project_id0resource"
+        ),
+    )
+    id = Column(Integer, primary_key=True)
+
+    project_id = Column(String(255))
+
+    resource = Column(String(255), nullable=False)
+    hard_limit = Column(Integer)
+
+
+class ProjectUserQuota(API_BASE):
+    """Represents a single quota override for a user with in a project."""
+
+    __tablename__ = 'project_user_quotas'
+    uniq_name = "uniq_project_user_quotas0user_id0project_id0resource"
+    __table_args__ = (
+        schema.UniqueConstraint("user_id", "project_id", "resource",
+                                name=uniq_name),
+        Index('project_user_quotas_project_id_idx',
+              'project_id'),
+        Index('project_user_quotas_user_id_idx',
+              'user_id',)
+    )
+    id = Column(Integer, primary_key=True, nullable=False)
+
+    project_id = Column(String(255), nullable=False)
+    user_id = Column(String(255), nullable=False)
+
+    resource = Column(String(255), nullable=False)
+    hard_limit = Column(Integer)
+
+
+class QuotaClass(API_BASE):
+    """Represents a single quota override for a quota class.
+
+    If there is no row for a given quota class and resource, then the
+    default for the deployment is used.  If the row is present but the
+    hard limit is Null, then the resource is unlimited.
+    """
+
+    __tablename__ = 'quota_classes'
+    __table_args__ = (
+        Index('quota_classes_class_name_idx', 'class_name'),
+    )
+    id = Column(Integer, primary_key=True)
+
+    class_name = Column(String(255))
+
+    resource = Column(String(255))
+    hard_limit = Column(Integer)
+
+
+class QuotaUsage(API_BASE):
+    """Represents the current usage for a given resource."""
+
+    __tablename__ = 'quota_usages'
+    __table_args__ = (
+        Index('quota_usages_project_id_idx', 'project_id'),
+        Index('quota_usages_user_id_idx', 'user_id'),
+    )
+    id = Column(Integer, primary_key=True)
+
+    project_id = Column(String(255))
+    user_id = Column(String(255))
+    resource = Column(String(255), nullable=False)
+
+    in_use = Column(Integer, nullable=False)
+    reserved = Column(Integer, nullable=False)
+
+    @property
+    def total(self):
+        return self.in_use + self.reserved
+
+    until_refresh = Column(Integer)
+
+
+class Reservation(API_BASE):
+    """Represents a resource reservation for quotas."""
+
+    __tablename__ = 'reservations'
+    __table_args__ = (
+        Index('reservations_project_id_idx', 'project_id'),
+        Index('reservations_uuid_idx', 'uuid'),
+        Index('reservations_expire_idx', 'expire'),
+        Index('reservations_user_id_idx', 'user_id'),
+    )
+    id = Column(Integer, primary_key=True, nullable=False)
+    uuid = Column(String(36), nullable=False)
+
+    usage_id = Column(Integer, ForeignKey('quota_usages.id'), nullable=False)
+
+    project_id = Column(String(255))
+    user_id = Column(String(255))
+    resource = Column(String(255))
+
+    delta = Column(Integer, nullable=False)
+    expire = Column(DateTime)
+
+    usage = orm.relationship(
+        "QuotaUsage",
+        foreign_keys=usage_id,
+        primaryjoin='Reservation.usage_id == QuotaUsage.id')