VMWare NSXv: Metadata for distributed router

Metadata support for NSXv distributed routers is provided via DHCP Edge
appliances. In order to avoid conflicts between distributed routers and
DHCP Edges which map different networks with same CIDRs, we create a 1:1
mapping between an distributed router and a DHCP Edge.

This patch contains the data model for the above, while the implementation
is in vmware-nsx repository.

Change-Id: I324403f7d5df4861193840e05bedf7a473aea655

neutron/db/migration/alembic_migrations/versions/354db87e3225_nsxv_vdr_metadata.py

@@ -0,0 +1,43 @@
+# Copyright 2015 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.
+#
+
+"""nsxv_vdr_metadata.py
+
+Revision ID: 354db87e3225
+Revises: kilo
+Create Date: 2015-04-19 14:59:15.102609
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '354db87e3225'
+down_revision = 'kilo'
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.create_table(
+        'nsxv_vdr_dhcp_bindings',
+        sa.Column('vdr_router_id', sa.String(length=36), nullable=False),
+        sa.Column('dhcp_router_id', sa.String(length=36), nullable=False),
+        sa.Column('dhcp_edge_id', sa.String(length=36), nullable=False),
+        sa.PrimaryKeyConstraint('vdr_router_id'),
+        sa.UniqueConstraint(
+            'dhcp_router_id',
+            name='unique_nsxv_vdr_dhcp_bindings0dhcp_router_id'),
+        sa.UniqueConstraint(
+            'dhcp_edge_id',
+            name='unique_nsxv_vdr_dhcp_bindings0dhcp_edge_id'))

neutron/db/migration/alembic_migrations/versions/HEAD

@@ -1 +1 @@
-kilo
+354db87e3225

neutron/plugins/vmware/dbexts/nsxv_models.py

@@ -238,3 +238,21 @@ class NsxvSpoofGuardPolicyNetworkMapping(model_base.BASEV2):
                            primary_key=True,
                            nullable=False)
     policy_id = sa.Column(sa.String(36), nullable=False)
+
+
+class NsxvVdrDhcpBinding(model_base.BASEV2):
+    """1:1 mapping between VDR and a DHCP Edge."""
+
+    __tablename__ = 'nsxv_vdr_dhcp_bindings'
+
+    vdr_router_id = sa.Column(sa.String(36), primary_key=True)
+    dhcp_router_id = sa.Column(sa.String(36), nullable=False)
+    dhcp_edge_id = sa.Column(sa.String(36), nullable=False)
+
+    __table_args__ = (
+        sa.UniqueConstraint(
+            dhcp_router_id,
+            name='unique_nsxv_vdr_dhcp_bindings0dhcp_router_id'),
+        sa.UniqueConstraint(
+            dhcp_edge_id,
+            name='unique_nsxv_vdr_dhcp_bindings0dhcp_edge_id'))