Adds Astara BYONF API extension

Adds the BYONF portion of the BYONF functionality.
This thin layer simply stores some data in the Neutron DB. A in-tree
migration repo has been setup to migrate the neutron DB to add the
necessary table.

Partially-implements: blueprint astara-sfc

Co-authored by: Mark McClain <mark@mcclain.xyz>

Change-Id: I6b6f98e8ae89c704f45b05f87f17ebed5a70fc1d

astara_neutron/db/migration/alembic_migrations/README

@@ -0,0 +1 @@
+Generic single-database configuration.

astara_neutron/db/migration/alembic_migrations/env.py

@@ -0,0 +1,85 @@
+#    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 logging import config as logging_config
+
+from alembic import context
+from neutron.db import model_base
+from oslo_config import cfg
+from oslo_db.sqlalchemy import session
+import sqlalchemy as sa
+from sqlalchemy import event
+
+
+MYSQL_ENGINE = None
+ASTARA_NEUTRON_VERSION_TABLE = 'alembic_version_astara_neutron'
+config = context.config
+neutron_config = config.neutron_config
+logging_config.fileConfig(config.config_file_name)
+target_metadata = model_base.BASEV2.metadata
+
+
+def set_mysql_engine():
+    try:
+        mysql_engine = neutron_config.command.mysql_engine
+    except cfg.NoSuchOptError:
+        mysql_engine = None
+
+    global MYSQL_ENGINE
+    MYSQL_ENGINE = (mysql_engine or
+                    model_base.BASEV2.__table_args__['mysql_engine'])
+
+
+def run_migrations_offline():
+    set_mysql_engine()
+
+    kwargs = dict()
+    if neutron_config.database.connection:
+        kwargs['url'] = neutron_config.database.connection
+    else:
+        kwargs['dialect_name'] = neutron_config.database.engine
+    kwargs['version_table'] = ASTARA_NEUTRON_VERSION_TABLE
+    context.configure(**kwargs)
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+@event.listens_for(sa.Table, 'after_parent_attach')
+def set_storage_engine(target, parent):
+    if MYSQL_ENGINE:
+        target.kwargs['mysql_engine'] = MYSQL_ENGINE
+
+
+def run_migrations_online():
+    set_mysql_engine()
+    engine = session.create_engine(neutron_config.database.connection)
+
+    connection = engine.connect()
+    context.configure(
+        connection=connection,
+        target_metadata=target_metadata,
+        version_table=ASTARA_NEUTRON_VERSION_TABLE
+    )
+
+    try:
+        with context.begin_transaction():
+            context.run_migrations()
+    finally:
+        connection.close()
+        engine.dispose()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

astara_neutron/db/migration/alembic_migrations/script.py.mako

@@ -0,0 +1,36 @@
+# Copyright ${create_date.year} <PUT YOUR NAME/COMPANY HERE>
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+#
+
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision}
+Create Date: ${create_date}
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+% if branch_labels:
+branch_labels = ${repr(branch_labels)}
+%endif
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}

astara_neutron/db/migration/alembic_migrations/versions/HEAD

@@ -0,0 +1 @@
+a999bcf20008

astara_neutron/db/migration/alembic_migrations/versions/a999bcf20008_initial_migration.py

@@ -0,0 +1,44 @@
+# Copyright 2016 <PUT YOUR NAME/COMPANY HERE>
+#
+#    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 alembic import op
+import sqlalchemy as sa
+
+
+"""empty message
+
+Revision ID: a999bcf20008
+Revises: start_astara_neutron
+Create Date: 2016-03-14 14:09:43.025886
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'a999bcf20008'
+down_revision = 'start_astara_neutron'
+
+
+def upgrade():
+    op.create_table(
+        'astara_byonf',
+        sa.Column('tenant_id', sa.String(length=255), nullable=False),
+        sa.Column('id', sa.String(length=36), nullable=False),
+        sa.Column('function_type', sa.String(length=255), nullable=False),
+        sa.Column('driver', sa.String(length=36), nullable=False),
+        sa.Column('image_uuid', sa.String(length=36), nullable=False),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint('tenant_id', 'function_type',
+                            name='uix_tenant_id_function'),
+    )

astara_neutron/db/migration/alembic_migrations/versions/astara_astara_neutron.py

@@ -0,0 +1,30 @@
+# Copyright 2014 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.
+#
+
+"""start astara-neutron chain
+
+Revision ID: start_astara_neutron
+Revises: None
+Create Date: 2015-03-14 11:06:18.196062
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'start_astara_neutron'
+down_revision = None
+
+
+def upgrade():
+    pass

astara_neutron/db/models/models.py

@@ -0,0 +1,28 @@
+# Copyright (c) 2016 Akanda, Inc. 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 sqlalchemy as sa
+
+from neutron.db import model_base, models_v2
+
+
+class Byonf(model_base.BASEV2, models_v2.HasId, models_v2.HasTenant):
+    __tablename__ = 'astara_byonf'
+    function_type = sa.Column(sa.String(length=255), nullable=False)
+    driver = sa.Column(sa.String(length=36), nullable=False)
+    image_uuid = sa.Column(sa.String(length=36), nullable=False)
+    __table_args__ = (
+        sa.UniqueConstraint(
+            'tenant_id', 'function_type', name='uix_tenant_id_function'),
+    )

astara_neutron/extensions/byonf.py

@@ -0,0 +1,118 @@
+# Copyright 2014 DreamHost, LLC
+# Author: DreamHost, LLC
+#
+# 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 neutron.api import extensions
+from neutron.api.v2 import attributes as attr
+
+from astara_neutron.extensions import _authzbase
+from astara_neutron.db.models import models
+
+import oslo_db.exception as db_exc
+import webob.exc
+
+
+class ByonfResource(_authzbase.ResourceDelegate):
+    """This resource is intended as a private API that allows the rug to chan
+    the supporting network function.
+    """
+    model = models.Byonf
+    resource_name = 'byonf'
+    collection_name = 'byonfs'
+
+    ATTRIBUTE_MAP = {
+        'tenant_id': {
+            'allow_post': True,
+            'allow_put': True,
+            'is_visible': True,
+            'validate': {'type:string': attr.TENANT_ID_MAX_LEN},
+        }, 'id': {
+            'allow_post': False,
+            'allow_put': False,
+            'is_visible': True
+        },
+        'image_uuid': {
+            'allow_post': True,
+            'allow_put': True,
+            'is_visible': True,
+            'enforce_policy': True,
+            'required_by_policy': True,
+            'validate': {'type:uuid': None}
+        },
+        'function_type': {
+            'allow_post': True,
+            'allow_put': True,
+            'is_visible': True,
+            'enforce_policy': True,
+            'required_by_policy': True
+        },
+        'driver': {
+            'allow_post': True,
+            'allow_put': True,
+            'is_visible': True,
+            'enforce_policy': True,
+            'required_by_policy': True
+        }
+    }
+
+    def create(self, context, tenant_id, resource_dict):
+        try:
+            return super(ByonfResource, self).create(
+                context, tenant_id, resource_dict)
+        except db_exc.DBDuplicateEntry:
+            raise webob.exc.HTTPConflict(
+                'Tenant %s already has driver associatation for function: %s' %
+                (resource_dict['tenant_id'], resource_dict['function_type']))
+
+    def make_dict(self, byo):
+        """
+        Convert a Byo model object to a dictionary.
+        """
+        return {
+            'tenant_id': byo['tenant_id'],
+            'image_uuid': byo['image_uuid'],
+            'function_type': byo['function_type'],
+            'driver': byo['driver'],
+            'id': byo['id']
+        }
+
+
+class Byonf(extensions.ExtensionDescriptor):
+    """
+    """
+    def get_name(self):
+        return "byonf"
+
+    def get_alias(self):
+        return "byonf"
+
+    def get_description(self):
+        return "A byonf extension"
+
+    def get_namespace(self):
+        return 'http://docs.openstack.org/api/ext/v1.0'
+
+    def get_updated(self):
+        return "2015-12-07T09:14:43-05:00"
+
+    def get_resources(self):
+        return [extensions.ResourceExtension(
+            'byonf',
+            _authzbase.create_extension(ByonfResource()))]
+
+    def get_actions(self):
+        return []
+
+    def get_request_extensions(self):
+        return []

astara_neutron/plugins/decorators.py

@@ -68,6 +68,7 @@ cfg.CONF.register_opts(astara_opts)
 
 SUPPORTED_EXTENSIONS = [
     'dhrouterstatus',
+    'byonf'
 ]
 
 

astara_neutron/plugins/ml2_neutron_plugin.py

@@ -35,7 +35,7 @@ class Ml2Plugin(plugin.Ml2Plugin):
 
     _supported_extension_aliases = (
         plugin.Ml2Plugin._supported_extension_aliases +
-        ["dhrouterstatus"]
+        ["dhrouterstatus", "byonf"]
     )
 
     disabled_extensions = [

releasenotes/notes/byonf-707f55a6aad7452a.yaml

@@ -0,0 +1,12 @@
+---
+features:
+  - Adds a new BYONF API extension to Neutron which allows operators to override
+    the astara-orchestrator driver used to back a resource as well as the Glance
+    image id to be used for the virtual appliance, on a per tenant basis.  This
+    requires leveraging the Neutron database to store these associations, so a
+    migration repository has been added to create the required tables there.
+
+other:
+  - In order to use the BYONF API, the Neutron database must be migrated to create
+    the required astara_byonf table.  This can be accomplished by running
+    ``neutron-db-manage --subproject astara-neutron upgrade head``.

setup.cfg

@@ -20,11 +20,12 @@ classifier =
 
 [files]
 packages =
-    akanda
-    akanda.neutron
     astara_neutron
-namespace_packages =
-    akanda
+
+[entry_points]
+neutron.db.alembic_migrations =
+    astara-neutron = astara_neutron.db.migration:alembic_migrations
+
 
 [global]
 setup-hooks =