Add MESO component that allows:

- Apmec to collaborate with other orchestration frameworks (e.g, NFV framework)

- for oprators to excecute smart placement decisions of MEC applications

Change-Id: I28fe23029f11632f1909967238b9fd440aa6f936

apmec/db/meso/meso_db.py

@@ -0,0 +1,356 @@
+# 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 datetime import datetime
+
+from oslo_db.exception import DBDuplicateEntry
+from oslo_log import log as logging
+from oslo_utils import timeutils
+from oslo_utils import uuidutils
+
+import sqlalchemy as sa
+from sqlalchemy import orm
+from sqlalchemy.orm import exc as orm_exc
+from sqlalchemy import schema
+
+from apmec.common import exceptions
+from apmec.db.common_services import common_services_db_plugin
+from apmec.db import db_base
+from apmec.db import model_base
+from apmec.db import models_v1
+from apmec.db import types
+from apmec.extensions import meso
+from apmec.plugins.common import constants
+
+LOG = logging.getLogger(__name__)
+_ACTIVE_UPDATE = (constants.ACTIVE, constants.PENDING_UPDATE)
+_ACTIVE_UPDATE_ERROR_DEAD = (
+    constants.PENDING_CREATE, constants.ACTIVE, constants.PENDING_UPDATE,
+    constants.ERROR, constants.DEAD)
+CREATE_STATES = (constants.PENDING_CREATE, constants.DEAD)
+
+
+###########################################################################
+# db tables
+
+class MESD(model_base.BASE, models_v1.HasId, models_v1.HasTenant,
+        models_v1.Audit):
+    """Represents MESD to create MES."""
+
+    __tablename__ = 'mesd'
+    # Descriptive name
+    name = sa.Column(sa.String(255), nullable=False)
+    description = sa.Column(sa.Text)
+    # Mesd template source - onboarded
+    template_source = sa.Column(sa.String(255), server_default='onboarded')
+    mesd_mapping = sa.Column(types.Json, nullable=True)
+    # (key, value) pair to spin up
+    attributes = orm.relationship('MESDAttribute',
+                                  backref='mesd')
+
+    __table_args__ = (
+        schema.UniqueConstraint(
+            "tenant_id",
+            "name",
+            name="uniq_mesd0tenant_id0name"),
+    )
+
+
+class MESDAttribute(model_base.BASE, models_v1.HasId):
+    """Represents attributes necessary for creation of mes in (key, value) pair
+
+    """
+
+    __tablename__ = 'mesd_attribute'
+    mesd_id = sa.Column(types.Uuid, sa.ForeignKey('mesd.id'),
+            nullable=False)
+    key = sa.Column(sa.String(255), nullable=False)
+    value = sa.Column(sa.TEXT(65535), nullable=True)
+
+
+class MES(model_base.BASE, models_v1.HasId, models_v1.HasTenant,
+        models_v1.Audit):
+    """Represents network services that deploys services.
+
+    """
+
+    __tablename__ = 'mes'
+    mesd_id = sa.Column(types.Uuid, sa.ForeignKey('mesd.id'))
+    mesd = orm.relationship('MESD')
+    mes_mapping = sa.Column(types.Json, nullable=True)
+    reused = sa.Column(types.Json, nullable=True)
+    name = sa.Column(sa.String(255), nullable=False)
+    description = sa.Column(sa.Text, nullable=True)
+
+    # Dict of MEA details that network service launches
+    mea_ids = sa.Column(sa.TEXT(65535), nullable=True)
+
+    # Dict of mgmt urls that network servic launches
+    mgmt_urls = sa.Column(sa.TEXT(65535), nullable=True)
+
+    status = sa.Column(sa.String(64), nullable=False)
+    vim_id = sa.Column(types.Uuid, sa.ForeignKey('vims.id'), nullable=False)
+    error_reason = sa.Column(sa.Text, nullable=True)
+
+    __table_args__ = (
+        schema.UniqueConstraint(
+            "tenant_id",
+            "name",
+            name="uniq_mes0tenant_id0name"),
+    )
+
+
+class MESOPluginDb(meso.MESOPluginBase, db_base.CommonDbMixin):
+
+    def __init__(self):
+        super(MESOPluginDb, self).__init__()
+        self._cos_db_plg = common_services_db_plugin.CommonServicesPluginDb()
+
+    def _get_resource(self, context, model, id):
+        try:
+            return self._get_by_id(context, model, id)
+        except orm_exc.NoResultFound:
+            if issubclass(model, MESD):
+                raise meso.MESDNotFound(mesd_id=id)
+            if issubclass(model, MES):
+                raise meso.MESNotFound(mes_id=id)
+            else:
+                raise
+
+    def _get_mes_db(self, context, mes_id, current_statuses, new_status):
+        try:
+            mes_db = (
+                self._model_query(context, MES).
+                filter(MES.id == mes_id).
+                filter(MES.status.in_(current_statuses)).
+                with_lockmode('update').one())
+        except orm_exc.NoResultFound:
+            raise meso.MESNotFound(mes_id=mes_id)
+        mes_db.update({'status': new_status})
+        return mes_db
+
+    def _make_attributes_dict(self, attributes_db):
+        return dict((attr.key, attr.value) for attr in attributes_db)
+
+    def _make_mesd_dict(self, mesd, fields=None):
+        res = {
+            'attributes': self._make_attributes_dict(mesd['attributes']),
+        }
+        key_list = ('id', 'tenant_id', 'name', 'description', 'mesd_mapping',
+                    'created_at', 'updated_at', 'template_source')
+        res.update((key, mesd[key]) for key in key_list)
+        return self._fields(res, fields)
+
+    def _make_dev_attrs_dict(self, dev_attrs_db):
+        return dict((arg.key, arg.value) for arg in dev_attrs_db)
+
+    def _make_mes_dict(self, mes_db, fields=None):
+        LOG.debug('mes_db %s', mes_db)
+        res = {}
+        key_list = ('id', 'tenant_id', 'mesd_id', 'name', 'description', 'mes_mapping',  # noqa
+                    'mea_ids', 'status', 'mgmt_urls', 'error_reason', 'reused',
+                    'vim_id', 'created_at', 'updated_at')
+        res.update((key, mes_db[key]) for key in key_list)
+        return self._fields(res, fields)
+
+    def create_mesd(self, context, mesd):
+        mesd = mesd['mesd']
+        LOG.debug('mesd %s', mesd)
+        tenant_id = self._get_tenant_id_for_create(context, mesd)
+        template_source = mesd.get('template_source')
+
+        try:
+            with context.session.begin(subtransactions=True):
+                mesd_id = uuidutils.generate_uuid()
+                mesd_db = MESD(
+                    id=mesd_id,
+                    tenant_id=tenant_id,
+                    name=mesd.get('name'),
+                    description=mesd.get('description'),
+                    mesd_mapping=mesd.get('mesd_mapping'),
+                    deleted_at=datetime.min,
+                    template_source=template_source)
+                context.session.add(mesd_db)
+                for (key, value) in mesd.get('attributes', {}).items():
+                    attribute_db = MESDAttribute(
+                        id=uuidutils.generate_uuid(),
+                        mesd_id=mesd_id,
+                        key=key,
+                        value=value)
+                    context.session.add(attribute_db)
+        except DBDuplicateEntry as e:
+            raise exceptions.DuplicateEntity(
+                _type="mesd",
+                entry=e.columns)
+        LOG.debug('mesd_db %(mesd_db)s %(attributes)s ',
+                  {'mesd_db': mesd_db,
+                   'attributes': mesd_db.attributes})
+        mesd_dict = self._make_mesd_dict(mesd_db)
+        LOG.debug('mesd_dict %s', mesd_dict)
+        self._cos_db_plg.create_event(
+            context, res_id=mesd_dict['id'],
+            res_type=constants.RES_TYPE_MESD,
+            res_state=constants.RES_EVT_ONBOARDED,
+            evt_type=constants.RES_EVT_CREATE,
+            tstamp=mesd_dict[constants.RES_EVT_CREATED_FLD])
+        return mesd_dict
+
+    def delete_mesd(self,
+            context,
+            mesd_id,
+            soft_delete=True):
+        with context.session.begin(subtransactions=True):
+            mess_db = context.session.query(MES).filter_by(
+                mesd_id=mesd_id).first()
+            if mess_db is not None and mess_db.deleted_at is None:
+                raise meso.MESDInUse(mesd_id=mesd_id)
+
+            mesd_db = self._get_resource(context, MESD,
+                                        mesd_id)
+            if soft_delete:
+                mesd_db.update({'deleted_at': timeutils.utcnow()})
+                self._cos_db_plg.create_event(
+                    context, res_id=mesd_db['id'],
+                    res_type=constants.RES_TYPE_MESD,
+                    res_state=constants.RES_EVT_NA_STATE,
+                    evt_type=constants.RES_EVT_DELETE,
+                    tstamp=mesd_db[constants.RES_EVT_DELETED_FLD])
+            else:
+                context.session.query(MESDAttribute).filter_by(
+                    mesd_id=mesd_id).delete()
+                context.session.delete(mesd_db)
+
+    def get_mesd(self, context, mesd_id, fields=None):
+        mesd_db = self._get_resource(context, MESD, mesd_id)
+        return self._make_mesd_dict(mesd_db)
+
+    def get_mesds(self, context, filters, fields=None):
+        if ('template_source' in filters) and \
+                (filters['template_source'][0] == 'all'):
+            filters.pop('template_source')
+        return self._get_collection(context, MESD,
+                                    self._make_mesd_dict,
+                                    filters=filters, fields=fields)
+
+    # reference implementation. needs to be overrided by subclass
+    def create_mes(self, context, mes):
+        LOG.debug('mes %s', mes)
+        mes = mes['mes']
+        tenant_id = self._get_tenant_id_for_create(context, mes)
+        mesd_id = mes['mesd_id']
+        vim_id = mes['vim_id']
+        name = mes.get('name')
+        mes_mapping = mes['mes_mapping']
+        mes_id = uuidutils.generate_uuid()
+        try:
+            with context.session.begin(subtransactions=True):
+                mesd_db = self._get_resource(context, MESD,
+                                            mesd_id)
+                mes_db = MES(id=mes_id,
+                           tenant_id=tenant_id,
+                           name=name,
+                           description=mesd_db.description,
+                           mea_ids=None,
+                           status=constants.PENDING_CREATE,
+                           mes_mapping=mes_mapping,
+                           reused=None,
+                           mgmt_urls=None,
+                           mesd_id=mesd_id,
+                           vim_id=vim_id,
+                           error_reason=None,
+                           deleted_at=datetime.min)
+                context.session.add(mes_db)
+        except DBDuplicateEntry as e:
+            raise exceptions.DuplicateEntity(
+                _type="mes",
+                entry=e.columns)
+        return self._make_mes_dict(mes_db)
+
+    def create_mes_post(self, context, mes_id,
+                        mes_status, error_reason, args):
+        LOG.debug('mes ID %s', mes_id)
+        with context.session.begin(subtransactions=True):
+            mes_db = self._get_resource(context, MES,
+                                       mes_id)
+            mes_db.update({'status': mes_status})
+            mes_db.update({'error_reason': error_reason})
+            mes_db.update({'updated_at': timeutils.utcnow()})
+            mes_db.update({'reused': args.get("NS")})
+            mes_dict = self._make_mes_dict(mes_db)
+        return mes_dict
+
+    # reference implementation. needs to be overrided by subclass
+    def delete_mes(self, context, mes_id):
+        with context.session.begin(subtransactions=True):
+            mes_db = self._get_mes_db(
+                context, mes_id, _ACTIVE_UPDATE_ERROR_DEAD,
+                constants.PENDING_DELETE)
+        deleted_mes_db = self._make_mes_dict(mes_db)
+        return deleted_mes_db
+
+    def delete_mes_post(self, context, mes_id,
+                       error_reason, soft_delete=True, error=False):
+        mes = self.get_mes(context, mes_id)
+        mesd_id = mes.get('mesd_id')
+        with context.session.begin(subtransactions=True):
+            query = (
+                self._model_query(context, MES).
+                filter(MES.id == mes_id).
+                filter(MES.status == constants.PENDING_DELETE))
+            if error:
+                query.update({'status': constants.ERROR})
+            if error_reason:
+                query.update({'error_reason': error_reason})
+            else:
+                if soft_delete:
+                    deleted_time_stamp = timeutils.utcnow()
+                    query.update({'deleted_at': deleted_time_stamp})
+
+                else:
+                    query.delete()
+            template_db = self._get_resource(context, MESD, mesd_id)
+            if template_db.get('template_source') == 'inline':
+                self.delete_mesd(context, mesd_id)
+
+    def get_mes(self, context, mes_id, fields=None):
+        mes_db = self._get_resource(context, MES, mes_id)
+        return self._make_mes_dict(mes_db)
+
+    def get_mess(self, context, filters=None, fields=None):
+        return self._get_collection(context, MES,
+                                    self._make_mes_dict,
+                                    filters=filters, fields=fields)
+
+    def _update_mes_pre(self, context, mes_id):
+        with context.session.begin(subtransactions=True):
+            mes_db = self._get_mes_db(context, mes_id, _ACTIVE_UPDATE, constants.PENDING_UPDATE)     # noqa
+            return self._make_mes_dict(mes_db)
+
+    def _update_mes_post(self, context, mes_id, error_reason, mes_status, args):       # noqa
+        with context.session.begin(subtransactions=True):
+            mes_db = self._get_resource(context, MES, mes_id)
+            mes_db.update({'status': mes_status})
+            mes_db.update({'error_reason': error_reason})
+            mes_db.update({'updated_at': timeutils.utcnow()})
+            mes_db.update({'reused': args.get('NS')})
+            mes_dict = self._make_mes_dict(mes_db)
+        return mes_dict
+
+    def _update_mes_status(self, context, mes_id, new_status):
+        with context.session.begin(subtransactions=True):
+            mes_db = self._get_mes_db(context, mes_id, _ACTIVE_UPDATE, new_status)        # noqa
+            return self._make_mes_dict(mes_db)
+
+    def update_mes(self, context, mes_id, mes):
+        self._update_mes_pre(context, mes_id)
+        self._update_mes_post(context, mes_id, constants.ACTIVE, None)

apmec/extensions/meo_plugins/edge_service.py

@@ -1,61 +0,0 @@
-# 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 abc
-import six
-
-from apmec.common import exceptions
-from apmec.services import service_base
-
-
-@six.add_metaclass(abc.ABCMeta)
-class MESPluginBase(service_base.MECPluginBase):
-
-    @abc.abstractmethod
-    def create_mesd(self, context, mesd):
-        pass
-
-    @abc.abstractmethod
-    def delete_mesd(self, context, mesd_id):
-        pass
-
-    @abc.abstractmethod
-    def get_mesd(self, context, mesd_id, fields=None):
-        pass
-
-    @abc.abstractmethod
-    def get_mesds(self, context, filters=None, fields=None):
-        pass
-
-    @abc.abstractmethod
-    def create_mes(self, context, mes):
-        pass
-
-    @abc.abstractmethod
-    def get_mess(self, context, filters=None, fields=None):
-        pass
-
-    @abc.abstractmethod
-    def get_mes(self, context, mes_id, fields=None):
-        pass
-
-    @abc.abstractmethod
-    def delete_mes(self, context, mes_id):
-        pass
-
-
-class MESDNotFound(exceptions.NotFound):
-    message = _('MESD %(mesd_id)s could not be found')
-
-
-class MESNotFound(exceptions.NotFound):
-    message = _('MES %(mes_id)s could not be found')

apmec/extensions/meso.py

@@ -0,0 +1,320 @@
+# Copyright 2016 Brocade Communications Systems 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 abc
+
+import six
+
+from apmec._i18n import _
+from apmec.api import extensions
+from apmec.api.v1 import attributes as attr
+from apmec.api.v1 import resource_helper
+from apmec.common import exceptions
+from apmec.plugins.common import constants
+from apmec.services import service_base
+
+
+class MESDInUse(exceptions.InUse):
+    message = _('MESD %(mesd_id)s is still in use')
+
+
+class MESInUse(exceptions.InUse):
+    message = _('MES %(mes_id)s is still in use')
+
+
+class NoTasksException(exceptions.ApmecException):
+    message = _('No tasks to run for %(action)s on %(resource)s')
+
+
+class MESDNotFound(exceptions.NotFound):
+    message = _('MESD %(mesd_id)s could not be found')
+
+
+class MESNotFound(exceptions.NotFound):
+    message = _('MES %(mes_id)s could not be found')
+
+
+class ToscaParserFailed(exceptions.InvalidInput):
+    message = _("tosca-parser failed: - %(error_msg_details)s")
+
+
+class NSDNotFound(exceptions.NotFound):
+    message = _('NSD template(s) not existed for MESD %(mesd_name)')
+
+
+class VNFFGDNotFound(exceptions.NotFound):
+    message = _('VNFFGD template(s) not existed for MESD %(mesd_name)')
+
+
+class MECDriverNotfound(exceptions.NotFound):
+    message = _('MEC driver not specified for the MESD %(mesd_name)')
+
+
+class NFVDriverNotFound(exceptions.NotFound):
+    message = _('NFV driver is not specified for the MESD %(mesd_name)')
+
+
+RESOURCE_ATTRIBUTE_MAP = {
+    'mesds': {
+        'id': {
+            'allow_post': False,
+            'allow_put': False,
+            'validate': {'type:uuid': None},
+            'is_visible': True,
+            'primary_key': True,
+        },
+        'tenant_id': {
+            'allow_post': True,
+            'allow_put': False,
+            'validate': {'type:string': None},
+            'required_by_policy': True,
+            'is_visible': True,
+        },
+        'name': {
+            'allow_post': True,
+            'allow_put': True,
+            'validate': {'type:string': None},
+            'is_visible': True,
+        },
+        'description': {
+            'allow_post': True,
+            'allow_put': True,
+            'validate': {'type:string': None},
+            'is_visible': True,
+            'default': '',
+        },
+        'mesd_mapping': {
+            'allow_post': False,
+            'allow_put': False,
+            'convert_to': attr.convert_none_to_empty_dict,
+            'validate': {'type:dict_or_nodata': None},
+            'is_visible': True,
+            'default': '',
+        },
+        'created_at': {
+            'allow_post': False,
+            'allow_put': False,
+            'is_visible': True,
+        },
+        'updated_at': {
+            'allow_post': False,
+            'allow_put': False,
+            'is_visible': True,
+        },
+        'attributes': {
+            'allow_post': True,
+            'allow_put': False,
+            'convert_to': attr.convert_none_to_empty_dict,
+            'validate': {'type:dict_or_nodata': None},
+            'is_visible': True,
+            'default': None,
+        },
+        'template_source': {
+            'allow_post': False,
+            'allow_put': False,
+            'is_visible': True,
+            'default': 'onboarded'
+        },
+
+    },
+
+    'mess': {
+        'id': {
+            'allow_post': False,
+            'allow_put': False,
+            'validate': {'type:uuid': None},
+            'is_visible': True,
+            'primary_key': True,
+        },
+        'tenant_id': {
+            'allow_post': True,
+            'allow_put': False,
+            'validate': {'type:string': None},
+            'required_by_policy': True,
+            'is_visible': True,
+        },
+        'name': {
+            'allow_post': True,
+            'allow_put': True,
+            'validate': {'type:string': None},
+            'is_visible': True,
+        },
+        'description': {
+            'allow_post': True,
+            'allow_put': True,
+            'validate': {'type:string': None},
+            'is_visible': True,
+            'default': '',
+        },
+        'created_at': {
+            'allow_post': False,
+            'allow_put': False,
+            'is_visible': True,
+        },
+        'updated_at': {
+            'allow_post': False,
+            'allow_put': False,
+            'is_visible': True,
+        },
+        'mes_mapping': {
+            'allow_post': False,
+            'allow_put': False,
+            'convert_to': attr.convert_none_to_empty_dict,
+            'validate': {'type:dict_or_nodata': None},
+            'is_visible': True,
+            'default': '',
+        },
+        'reused': {
+            'allow_post': False,
+            'allow_put': False,
+            'convert_to': attr.convert_none_to_empty_dict,
+            'validate': {'type:dict_or_nodata': None},
+            'is_visible': True,
+            'default': '',
+        },
+        'mesd_id': {
+            'allow_post': True,
+            'allow_put': False,
+            'validate': {'type:uuid': None},
+            'is_visible': True,
+            'default': None,
+        },
+        'vim_id': {
+            'allow_post': True,
+            'allow_put': False,
+            'validate': {'type:string': None},
+            'is_visible': True,
+            'default': '',
+        },
+        'status': {
+            'allow_post': False,
+            'allow_put': False,
+            'is_visible': True,
+        },
+        'error_reason': {
+            'allow_post': False,
+            'allow_put': False,
+            'is_visible': True,
+        },
+        'attributes': {
+            'allow_post': True,
+            'allow_put': False,
+            'convert_to': attr.convert_none_to_empty_dict,
+            'validate': {'type:dict_or_nodata': None},
+            'is_visible': True,
+            'default': None,
+        },
+        'mesd_template': {
+            'allow_post': True,
+            'allow_put': True,
+            'validate': {'type:dict_or_nodata': None},
+            'is_visible': True,
+            'default': None,
+        },
+    },
+
+}
+
+
+class Meso(extensions.ExtensionDescriptor):
+    @classmethod
+    def get_name(cls):
+        return 'MEC Service Orchestrator'
+
+    @classmethod
+    def get_alias(cls):
+        return 'MESO'
+
+    @classmethod
+    def get_description(cls):
+        return "Extension for MEC Service Orchestrator"
+
+    @classmethod
+    def get_namespace(cls):
+        return 'http://wiki.openstack.org/Apmec'
+
+    @classmethod
+    def get_updated(cls):
+        return "2015-12-21T10:00:00-00:00"
+
+    @classmethod
+    def get_resources(cls):
+        special_mappings = {}
+        plural_mappings = resource_helper.build_plural_mappings(
+            special_mappings, RESOURCE_ATTRIBUTE_MAP)
+        attr.PLURALS.update(plural_mappings)
+        return resource_helper.build_resource_info(
+            plural_mappings, RESOURCE_ATTRIBUTE_MAP, constants.MESO,
+            translate_name=True)
+
+    @classmethod
+    def get_plugin_interface(cls):
+        return MESOPluginBase
+
+    def update_attributes_map(self, attributes):
+        super(Meso, self).update_attributes_map(
+            attributes, extension_attrs_map=RESOURCE_ATTRIBUTE_MAP)
+
+    def get_extended_resources(self, version):
+        version_map = {'1.0': RESOURCE_ATTRIBUTE_MAP}
+        return version_map.get(version, {})
+
+
+@six.add_metaclass(abc.ABCMeta)
+class MESOPluginBase(service_base.MECPluginBase):
+    def get_plugin_name(self):
+        return constants.MESO
+
+    def get_plugin_type(self):
+        return constants.MESO
+
+    def get_plugin_description(self):
+        return 'Apmec MEC service Orchestrator plugin'
+
+    @abc.abstractmethod
+    def create_mesd(self, context, mesd):
+        pass
+
+    @abc.abstractmethod
+    def delete_mesd(self, context, mesd_id):
+        pass
+
+    @abc.abstractmethod
+    def get_mesd(self, context, mesd_id, fields=None):
+        pass
+
+    @abc.abstractmethod
+    def get_mesds(self, context, filters=None, fields=None):
+        pass
+
+    @abc.abstractmethod
+    def create_mes(self, context, mes):
+        pass
+
+    @abc.abstractmethod
+    def get_mess(self, context, filters=None, fields=None):
+        pass
+
+    @abc.abstractmethod
+    def get_mes(self, context, mes_id, fields=None):
+        pass
+
+    @abc.abstractmethod
+    def delete_mes(self, context, mes_id):
+        pass
+
+    @abc.abstractmethod
+    def update_mes(self, context, mes_id, mes):
+        pass

apmec/meso/drivers/nfv_drivers/abstract_driver.py

@@ -0,0 +1,44 @@
+# 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 abc
+
+import six
+
+from apmec.api import extensions
+
+
+@six.add_metaclass(abc.ABCMeta)
+class NfvAbstractDriver(extensions.PluginInterface):
+
+    @abc.abstractmethod
+    def get_type(self):
+        """Get NFV Driver type
+
+        Return one of predefined types of NFV drivers.
+        """
+        pass
+
+    @abc.abstractmethod
+    def get_name(self):
+        """Get NFV driver name
+
+        Return a symbolic name for the NFV driver.
+        """
+        pass
+
+    @abc.abstractmethod
+    def get_description(self):
+        pass

apmec/meso/drivers/nfv_drivers/tacker_driver.py

@@ -0,0 +1,278 @@
+#    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 keystoneauth1 import identity
+from keystoneauth1 import session
+from oslo_config import cfg
+from oslo_log import log as logging
+
+from apmec.meso.drivers.nfv_drivers import abstract_driver
+
+from tackerclient.v1_0 import client as tacker_client
+
+LOG = logging.getLogger(__name__)
+CONF = cfg.CONF
+
+
+class Tacker_Driver(abstract_driver.NfvAbstractDriver):
+    """Driver for NFV
+
+    OpenStack driver handles interactions with local as well as
+    remote OpenStack instances. The driver invokes keystone service for VIM
+    authorization and validation. The driver is also responsible for
+    discovering placement attributes such as regions, availability zones
+    """
+
+    def get_type(self):
+        return 'tacker'
+
+    def get_name(self):
+        return 'OpenStack Tacker Driver'
+
+    def get_description(self):
+        return 'OpenStack Tacker Driver'
+
+    def nsd_create(self, auth_attr, nsd_dict):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.nsd_create(nsd_dict)
+
+    def nsd_get_by_name(self, auth_attr, nsd_name):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.nsd_get_by_name(nsd_name)
+
+    def nsd_get(self, auth_attr, nsd_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.nsd_get(nsd_id)
+
+    def ns_create(self, auth_attr, ns_dict):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.ns_create(ns_dict)
+
+    def ns_get_by_name(self, auth_attr, ns_name):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.ns_get(ns_name)
+
+    def ns_get(self, auth_attr, ns_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.ns_get(ns_id)
+
+    def ns_check(self, auth_attr, ns_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.ns_check(ns_id)
+
+    def ns_delete_by_name(self, auth_attr, ns_name):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.ns_delete(ns_name)
+
+    def ns_delete(self, auth_attr, ns_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.ns_delete(ns_id)
+
+    def ns_update(self, auth_attr, ns_id, ns_dict):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.ns_update(ns_id, ns_dict)
+
+    def vnfd_create(self, auth_attr, vnfd_dict):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnfd_create(vnfd_dict)
+
+    def vnf_create(self, auth_attr, vnf_dict):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnf_create(vnf_dict)
+
+    def vnf_get(self, auth_attr, vnf_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnf_get(vnf_id)
+
+    def vnfd_get(self, auth_attr, vnfd_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnfd_get(vnfd_id)
+
+    def vnffgd_get_by_name(self, auth_attr, vnffgd_name):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnffgd_get(vnffgd_name)
+
+    def vnffgd_get(self, auth_attr, vnffgd_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnffgd_get(vnffgd_id)
+
+    def vnffg_create(self, auth_attr, vnffg_dict):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnffg_create(vnffg_dict)
+
+    def vnffg_get_by_name(self, auth_attr, vnffg_name):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnffg_get(vnffg_name)
+
+    def vnffg_get(self, auth_attr, vnffg_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnffg_get(vnffg_id)
+
+    def vnffg_delete_by_name(self, auth_attr, vnffg_name):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnffg_delete(vnffg_name)
+
+    def vnffg_delete(self, auth_attr, vnffg_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnffg_delete(vnffg_id)
+
+    def vnffg_check(self, auth_attr, vnffg_id):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.vnffg_check(vnffg_id)
+
+    def vnffg_update(self, auth_attr, vnffg_id, vnffg_dict):
+        tacker_client = TackerClient(auth_attr)
+        return tacker_client.ns_update(vnffg_id, vnffg_dict)
+
+
+class TackerClient(object):
+    """Tacker Client class for VNFM and NFVO negotiation"""
+
+    def __init__(self, auth_attr):
+        auth = identity.Password(**auth_attr)
+        sess = session.Session(auth=auth)
+        self.client = tacker_client.Client(session=sess)
+
+    def nsd_create(self, nsd_dict):
+        nsd_instance = self.client.create_nsd(body=nsd_dict)
+        if nsd_instance:
+            return nsd_instance['nsd']['id']
+        else:
+            return None
+
+    def nsd_get_by_name(self, nsd_name):
+        nsd_dict = self.client.list_nsds()
+        nsd_list = nsd_dict['nsds']
+        nsd_dict = None
+        for nsd in nsd_list:
+            if nsd['name'] == nsd_name:
+                nsd_dict = nsd
+        return nsd_dict
+
+    def nsd_get(self, nsd_id):
+        nsd_dict = self.client.show_nsd(nsd_id)
+        return nsd_dict['nsd']
+
+    def ns_create(self, ns_dict):
+        ns_instance = self.client.create_ns(body=ns_dict)
+        if ns_instance:
+            return ns_instance['ns']['id']
+        else:
+            return None
+
+    def ns_get_by_name(self, ns_name):
+        ns_dict = self.client.list_nsds()
+        ns_list = ns_dict['nss']
+        ns_id = None
+        for ns in ns_list:
+            if ns['name'] == ns_name:
+                ns_id = ns['id']
+        return ns_id
+
+    def ns_get(self, ns_id):
+        ns_instance = self.client.show_ns(ns_id)
+        return ns_instance['ns']
+
+    def ns_delete_by_name(self, ns_name):
+        ns_id = self.ns_get_by_name(ns_name)
+        if ns_id:
+            self.client.delete_ns(ns_id)
+
+    def ns_check(self, ns_id):
+        ns_dict = self.client.list_nss()
+        ns_list = ns_dict['nss']
+        check = False
+        for ns in ns_list:
+            if ns['id'] == ns_id:
+                check = True
+        return check
+
+    def ns_delete(self, ns_id):
+        return self.client.delete_ns(ns_id)
+
+    def ns_update(self, ns_id, ns_dict):
+        return self.client.update_ns(ns_id, ns_dict)
+
+    def vnfd_create(self, vnfd_dict):
+        vnfd_instance = self.client.create_vnfd(body=vnfd_dict)
+        if vnfd_instance:
+            return vnfd_instance['vnf']['id']
+        else:
+            return None
+
+    def vnf_create(self, vnf_dict):
+        vnf_instance = self.client.create_vnf(body=vnf_dict)
+        if vnf_instance:
+            return vnf_instance['vnf']['id']
+        else:
+            return None
+
+    def vnf_get(self, vnf_id):
+        vnf_instance = self.client.show_vnf(vnf_id)
+        return vnf_instance['vnf']
+
+    def vnfd_get(self, vnfd_id):
+        vnfd_instance = self.client.show_vnfd(vnfd_id)
+        return vnfd_instance['vnfd']
+
+    def vnffgd_get_by_name(self, vnffgd_name):
+        vnffgd_dict = self.client.list_vnffgds()
+        vnffgd_list = vnffgd_dict['vnffgds']
+        vnffgd_dict = None
+        for vnffgd in vnffgd_list:
+            if vnffgd['name'] == vnffgd_name:
+                vnffgd_dict = vnffgd
+        return vnffgd_dict
+
+    def vnffgd_get(self, vnffgd_id):
+        vnffgd_instance = self.client.show_vnffgd(vnffgd_id)
+        return vnffgd_instance['vnffgd']
+
+    def vnffg_create(self, vnffgd_dict):
+        vnffg_instance = self.client.create_vnffg(body=vnffgd_dict)
+        if vnffg_instance:
+            return vnffg_instance['vnffg']['id']
+        else:
+            return None
+
+    def vnffg_get_by_name(self, vnffg_name):
+        vnffg_dict = self.client.list_vnffgs()
+        vnffg_list = vnffg_dict['vnffgs']
+        vnffg_id = None
+        for vnffg in vnffg_list:
+            if vnffg['name'] == vnffg_name:
+                vnffg_id = vnffg['id']
+        return vnffg_id
+
+    def vnffg_get(self, vnffg_id):
+        vnffg_instance = self.client.show_vnffg(vnffg_id)
+        return vnffg_instance['vnffg']
+
+    def vnffg_delete_by_name(self, vnffg_name):
+        vnffg_id = self.vnffg_get_by_name(vnffg_name)
+        if vnffg_id:
+            self.client.delete_vnffg(vnffg_id)
+
+    def vnffg_delete(self, vnffg_id):
+        return self.client.delete_vnffg(vnffg_id)
+
+    def vnffg_check(self, vnffg_id):
+        vnffg_dict = self.client.list_vnffgs()
+        vnffg_list = vnffg_dict['vnffgs']
+        check = False
+        for vnffg in vnffg_list:
+            if vnffg['id'] == vnffg_id:
+                check = True
+        return check
+
+    def vnffg_update(self, vnffg_id, vnffg_dict):
+        return self.client.update_ns(vnffg_id, vnffg_dict)

apmec/meso/meso_plugin.py

@@ -0,0 +1,943 @@
+# Copyright 2016 Brocade Communications System, 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 ast
+import copy
+import eventlet
+import random
+import time
+import yaml
+
+from oslo_config import cfg
+from oslo_log import log as logging
+from oslo_utils import excutils
+from oslo_utils import uuidutils
+
+
+from apmec._i18n import _
+from apmec.common import driver_manager
+from apmec.common import log
+from apmec.common import utils
+from apmec.db.meso import meso_db
+from apmec.extensions import common_services as cs
+from apmec.extensions import meso
+from apmec import manager
+
+from apmec.mem import vim_client
+from apmec.plugins.common import constants
+
+
+LOG = logging.getLogger(__name__)
+CONF = cfg.CONF
+NS_RETRIES = 30
+NS_RETRY_WAIT = 6
+MEC_RETRIES = 30
+MEC_RETRY_WAIT = 6
+VNFFG_RETRIES = 30
+VNFFG_RETRY_WAIT = 6
+
+
+def config_opts():
+    return [('meso', MesoPlugin.OPTS)]
+
+
+NF_CAP_MAX = 3
+VNF_LIST = ['VNF1', 'VNF2', 'VNF2', 'VNF3', 'VNF4', 'VNF5', 'VNF6']
+VM_CAPA = dict()
+for vnf_name in VNF_LIST:
+    VM_CAPA[vnf_name] = random.randint(1, NF_CAP_MAX)
+
+
+class MesoPlugin(meso_db.MESOPluginDb):
+    """MESO reference plugin for MESO extension
+
+    Implements the MESO extension and defines public facing APIs for VIM
+    operations. MESO internally invokes the appropriate VIM driver in
+    backend based on configured VIM types. Plugin also interacts with MEM
+    extension for providing the specified VIM information
+    """
+    supported_extension_aliases = ['meso']
+
+    OPTS = [
+        cfg.ListOpt(
+            'nfv_drivers', default=['tacker'],
+            help=_('NFV drivers for launching NSs')),
+    ]
+    cfg.CONF.register_opts(OPTS, 'meso')
+
+    def __init__(self):
+        super(MesoPlugin, self).__init__()
+        self._pool = eventlet.GreenPool()
+        self._nfv_drivers = driver_manager.DriverManager(
+            'apmec.meso.drivers',
+            cfg.CONF.meso.nfv_drivers)
+        self.vim_client = vim_client.VimClient()
+
+    def get_auth_dict(self, context):
+        auth = CONF.keystone_authtoken
+        return {
+            'auth_url': auth.auth_url + '/v3',
+            'token': context.auth_token,
+            'project_domain_name': auth.project_domain_name or context.domain,
+            'project_name': context.tenant_name
+        }
+
+    def spawn_n(self, function, *args, **kwargs):
+        self._pool.spawn_n(function, *args, **kwargs)
+
+    def _build_vim_auth(self, context, vim_info):
+        LOG.debug('VIM id is %s', vim_info['id'])
+        vim_auth = vim_info['auth_cred']
+        vim_auth['password'] = self._decode_vim_auth(context,
+                                                     vim_info['id'],
+                                                     vim_auth)
+        vim_auth['auth_url'] = vim_info['auth_url']
+
+        # These attributes are needless for authentication
+        # from keystone, so we remove them.
+        needless_attrs = ['key_type', 'secret_uuid']
+        for attr in needless_attrs:
+            if attr in vim_auth:
+                vim_auth.pop(attr, None)
+        return vim_auth
+
+    @log.log
+    def create_mesd(self, context, mesd):
+        mesd_data = mesd['mesd']
+        template = mesd_data['attributes'].get('mesd')
+        if isinstance(template, dict):
+            mesd_data['attributes']['mesd'] = yaml.safe_dump(
+                template)
+        LOG.debug('mesd %s', mesd_data)
+
+        if 'template_source' in mesd_data:
+            template_source = mesd_data.get('template_source')
+        else:
+            template_source = "onboarded"
+        mesd['mesd']['template_source'] = template_source
+
+        self._parse_template_input(context, mesd)
+        return super(MesoPlugin, self).create_mesd(
+            context, mesd)
+
+    def _parse_template_input(self, context, mesd):
+        mesd_dict = mesd['mesd']
+        mesd_yaml = mesd_dict['attributes'].get('mesd')
+        inner_mesd_dict = yaml.safe_load(mesd_yaml)
+        mesd_dict['mesd_mapping'] = dict()
+        LOG.debug('mesd_dict: %s', inner_mesd_dict)
+        # From import we can deploy both NS and MEC Application
+        nsd_imports = inner_mesd_dict['imports'].get('nsds')
+        vnffg_imports = inner_mesd_dict['imports'].get('vnffgds')
+        if nsd_imports:
+            nsd_tpls = nsd_imports.get('nsd_templates')
+            nfv_driver = nsd_imports.get('nfv_driver')
+            if not nsd_tpls:
+                raise meso.NSDNotFound(mesd_name=mesd_dict['name'])
+            if nfv_driver.lower() not in\
+                    [driver.lower() for driver in constants.NFV_DRIVER]:
+                raise meso.NFVDriverNotFound(mesd_name=mesd_dict['name'])
+            if isinstance(nsd_tpls, list):
+                mesd_dict['attributes']['nsds'] = '-'.join(nsd_tpls)
+                mesd_dict['mesd_mapping']['NSD'] = nsd_tpls
+        if vnffg_imports:
+            vnffgd_tpls = vnffg_imports.get('vnffgd_templates')
+            nfv_driver = vnffg_imports.get('nfv_driver')
+            if not vnffgd_tpls:
+                raise meso.VNFFGDNotFound(mesd_name=mesd_dict['name'])
+            if nfv_driver.lower() not in \
+                    [driver.lower() for driver in constants.NFV_DRIVER]:
+                raise meso.NFVDriverNotFound(mesd_name=mesd_dict['name'])
+            if isinstance(vnffgd_tpls, list):
+                mesd_dict['mesd_mapping']['VNFFGD'] = vnffgd_tpls
+                mesd_dict['attributes']['vnffgds'] = '-'.join(vnffgd_tpls)
+
+        if ('description' not in mesd_dict or
+                mesd_dict['description'] == ''):
+            mesd_dict['description'] = inner_mesd_dict.get(
+                'description', '')
+        if (('name' not in mesd_dict or
+                not len(mesd_dict['name'])) and
+                'metadata' in inner_mesd_dict):
+            mesd_dict['name'] = inner_mesd_dict['metadata'].get(
+                'template_name', '')
+
+        LOG.debug('mesd %s', mesd)
+
+    def _get_mead_id(self, mead_name, onboarded_meads):
+        for mead in onboarded_meads:
+            if mead_name == mead['name']:
+                return mead['id']
+
+    @log.log
+    def create_mes(self, context, mes):
+        """Create MES and corresponding MEAs.
+
+        :param mes: mes dict which contains mesd_id and attributes
+        This method has 2 steps:
+        step-1: Call MEO API to create MEAs
+        step-2: Call Tacker drivers to create NSs
+        """
+        mes_info = mes['mes']
+        name = mes_info['name']
+        mes_info['mes_mapping'] = dict()
+
+        if mes_info.get('mesd_template'):
+            mesd_name = utils.generate_resource_name(name, 'inline')
+            mesd = {'mesd': {
+                'attributes': {'mesd': mes_info['mesd_template']},
+                'description': mes_info['description'],
+                'name': mesd_name,
+                'template_source': 'inline',
+                'tenant_id': mes_info['tenant_id']}}
+            mes_info['mesd_id'] = self.create_mesd(context, mesd).get('id')
+
+        mesd = self.get_mesd(context, mes['mes']['mesd_id'])
+        mesd_dict = yaml.safe_load(mesd['attributes']['mesd'])
+        meo_plugin = manager.ApmecManager.get_service_plugins()['MEO']
+
+        region_name = mes.setdefault('placement_attr', {}).get(
+            'region_name', None)
+        vim_res = self.vim_client.get_vim(context, mes['mes']['vim_id'],
+                                          region_name)
+        # driver_type = vim_res['vim_type']
+        if not mes['mes']['vim_id']:
+            mes['mes']['vim_id'] = vim_res['vim_id']
+
+        ##########################################
+        # Detect MANO driver here:
+        # Defined in the Tosca template
+        nfv_driver = None
+        if mesd_dict['imports'].get('nsds'):
+            nfv_driver = mesd_dict['imports']['nsds']['nfv_driver']
+            nfv_driver = nfv_driver.lower()
+        if mesd_dict['imports'].get('vnffgds'):
+            nfv_driver = mesd_dict['imports']['vnffgds']['nfv_driver']
+            nfv_driver = nfv_driver.lower()
+
+        ##########################################
+        def _find_vnf_ins(cd_mes):
+            al_ns_id_list = cd_mes['mes_mapping'].get('NS')
+            if not al_ns_id_list:
+                return None, None
+            al_ns_id = al_ns_id_list[0]
+            try:
+                ns_instance = self._nfv_drivers.invoke(
+                    nfv_driver,  # How to tell it is Tacker
+                    'ns_get',
+                    ns_id=al_ns_id,
+                    auth_attr=vim_res['vim_auth'], )
+            except Exception:
+                return None, None
+            if ns_instance['status'] != 'ACTIVE':
+                return None, None
+            al_vnf = ns_instance['vnf_ids']
+            al_vnf_dict = ast.literal_eval(al_vnf)
+            return ns_instance['id'], al_vnf_dict
+
+        def _run_meso_algorithm(req_vnf_list):
+            is_accepted = False
+            al_mes_list = self.get_mess(context)
+            ns_candidate = dict()
+            for al_mes in al_mes_list:
+                ns_candidate[al_mes['id']] = dict()
+                if al_mes['status'] != "ACTIVE":
+                    continue
+                al_ns_id, al_vnf_dict = _find_vnf_ins(al_mes)
+                if not al_ns_id:
+                    continue
+                ns_candidate[al_mes['id']][al_ns_id] = dict()
+                for req_vnf_dict in req_vnf_list:
+                    for vnf_name, al_vnf_id in al_vnf_dict.items():
+                        if req_vnf_dict['name'] == vnf_name:
+                            # Todo: remember to change this with VM capacity
+                            len_diff =\
+                                len([lend for lend in
+                                     al_mes['reused'][vnf_name]
+                                     if lend > 0])
+                            avail = len_diff - req_vnf_dict['nf_ins']
+                            ns_candidate[al_mes['id']][al_ns_id].\
+                                update({vnf_name: avail})
+
+            ns_cds = dict()
+            deep_ns = dict()
+            for mesid, ns_data_dict in ns_candidate.items():
+                for nsid, resev_dict in ns_data_dict.items():
+                    if len(resev_dict) == len(req_vnf_list):
+                        nf_ins_list =\
+                            [nf_ins for nf_name, nf_ins in
+                             resev_dict.items() if nf_ins >= 0]
+                        if len(nf_ins_list) == len(req_vnf_list):
+                            total_ins = sum(nf_ins_list)
+                            ns_cds[mesid] = total_ins
+                        else:
+                            extra_nf_ins_list =\
+                                [-nf_ins for nf_name, nf_ins in
+                                 resev_dict.items() if nf_ins < 0]
+                            total_ins = sum(extra_nf_ins_list)
+                            deep_ns[mesid] = total_ins
+            if ns_cds:
+                selected_mes1 = min(ns_cds, key=ns_cds.get)
+                is_accepted = True
+                return is_accepted, selected_mes1, None
+            if deep_ns:
+                selected_mes2 = min(deep_ns, key=deep_ns.get)
+                is_accepted = True
+                return is_accepted, selected_mes2, ns_candidate[selected_mes2]
+
+            return is_accepted, None, None
+
+        build_nsd_dict = dict()
+        if mesd_dict['imports'].get('nsds'):
+            # For framework evaluation
+            nsd_template = mesd_dict['imports']['nsds']['nsd_templates']
+            if isinstance(nsd_template, dict):
+                if nsd_template.get('requirements'):
+                    req_nf_dict = nsd_template['requirements']
+                    req_nf_list = list()
+                    for vnf_dict in req_nf_dict:
+                        # Todo: make the requests more natural
+                        req_nf_list.append(
+                            {'name': vnf_dict['name'],
+                             'nf_ins': int(vnf_dict['vnfd_template'][5])})
+                    is_accepted, cd_mes_id, cd_vnf_dict =\
+                        _run_meso_algorithm(req_nf_list)
+                    if is_accepted:
+                        new_mesd_dict = dict()
+                        ref_mesd_dict = copy.deepcopy(mesd_dict)
+                        ref_mesd_dict['imports']['nsds']['nsd_templates']['requirements'] = \
+                            req_nf_list
+                        new_mesd_dict['mes'] = dict()
+                        new_mesd_dict['mes'] =\
+                            {'mesd_template': yaml.safe_dump(ref_mesd_dict)}
+                        self.update_mes(context, cd_mes_id, new_mesd_dict)
+                        return cd_mes_id
+                    else:
+                        # Create the inline NS with the following template
+                        import_list = list()
+                        node_dict = dict()
+                        for vnfd in req_nf_dict:
+                            import_list.append(vnfd['vnfd_template'])
+                            node = 'tosca.nodes.nfv.' + vnfd['name']
+                            node_dict[vnfd['name']] = {'type': node}
+                        build_nsd_dict['tosca_definitions_version'] =\
+                            'tosca_simple_profile_for_nfv_1_0_0'
+                        build_nsd_dict['description'] = mes_info['description']
+                        build_nsd_dict['imports'] = import_list
+                        build_nsd_dict['topology_template'] = dict()
+                        build_nsd_dict['topology_template']['node_templates'] =\
+                            node_dict
+
+            nsds = mesd['attributes'].get('nsds')
+            mes_info['mes_mapping']['NS'] = list()
+            if nsds:
+                nsds_list = nsds.split('-')
+                for nsd in nsds_list:
+                    ns_name = nsd + '-' + name + '-' + uuidutils.generate_uuid()  # noqa
+                    nsd_instance = self._nfv_drivers.invoke(
+                        nfv_driver,
+                        'nsd_get_by_name',
+                        nsd_name=nsd,
+                        auth_attr=vim_res['vim_auth'],)
+                    if nsd_instance:
+                        ns_arg = {'ns': {'nsd_id': nsd_instance['id'],
+                                         'name': ns_name}}
+                        ns_id = self._nfv_drivers.invoke(
+                            nfv_driver,  # How to tell it is Tacker
+                            'ns_create',
+                            ns_dict=ns_arg,
+                            auth_attr=vim_res['vim_auth'], )
+                        mes_info['mes_mapping']['NS'].append(ns_id)
+            if build_nsd_dict:
+                ns_name = 'nsd' + name + '-' + uuidutils.generate_uuid()
+                ns_arg = {'ns': {'nsd_template': build_nsd_dict,
+                                 'name': ns_name,
+                                 'description': mes_info['description'],
+                                 'vim_id': '',
+                                 'tenant_id': mes_info['tenant_id'],
+                                 'attributes': {}}}
+                ns_id = self._nfv_drivers.invoke(
+                    nfv_driver,  # How to tell it is Tacker
+                    'ns_create',
+                    ns_dict=ns_arg,
+                    auth_attr=vim_res['vim_auth'], )
+                mes_info['mes_mapping']['NS'].append(ns_id)
+
+        vnffgds = mesd['attributes'].get('vnffgds')
+        if mesd_dict['imports'].get('vnffgds'):
+            vnffgds_list = vnffgds.split('-')
+            mes_info['mes_mapping']['VNFFG'] = list()
+            for vnffgd in vnffgds_list:
+                vnffg_name = vnffgds + '-' + name + '-' + uuidutils.generate_uuid()   # noqa
+                vnffgd_instance = self._nfv_drivers.invoke(
+                    nfv_driver,  # How to tell it is Tacker
+                    'vnffgd_get_by_name',
+                    vnffgd_name=vnffgd,
+                    auth_attr=vim_res['vim_auth'], )
+                if vnffgd_instance:
+                    vnffg_arg = {'vnffg': {'vnffgd_id': vnffgd_instance['id'], 'name': vnffg_name}}  # noqa
+                    vnffg_id = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'vnffg_create',
+                        vnffg_dict=vnffg_arg,
+                        auth_attr=vim_res['vim_auth'], )
+                    mes_info['mes_mapping']['VNFFG'].append(vnffg_id)
+
+        # meca_id = dict()
+        # Create MEAs using MEO APIs
+        try:
+            meca_name = 'meca' + '-' + name + '-' + uuidutils.generate_uuid()
+            # Separate the imports out from template
+            mead_tpl_dict = dict()
+            mead_tpl_dict['imports'] =\
+                mesd_dict['imports']['meads']['mead_templates']
+            mecad_dict = copy.deepcopy(mesd_dict)
+            mecad_dict.pop('imports')
+            mecad_dict.update(mead_tpl_dict)
+            LOG.debug('mesd %s', mecad_dict)
+            meca_arg = {'meca': {'mecad_template': mecad_dict, 'name': meca_name,   # noqa
+                                 'description': mes_info['description'],
+                                 'tenant_id': mes_info['tenant_id'],
+                                 'vim_id': mes_info['vim_id'],
+                                 'attributes': {}}}
+            meca_dict = meo_plugin.create_meca(context, meca_arg)
+            mes_info['mes_mapping']['MECA'] = meca_dict['id']
+        except Exception as e:
+            LOG.error('Error while creating the MECAs: %s', e)
+            # Call Tacker client driver
+
+        mes_dict = super(MesoPlugin, self).create_mes(context, mes)
+
+        def _create_mes_wait(self_obj, mes_id):
+            args = dict()
+            mes_status = "ACTIVE"
+            ns_status = "PENDING_CREATE"
+            vnffg_status = "PENDING_CREATE"
+            mec_status = "PENDING_CREATE"
+            ns_retries = NS_RETRIES
+            mec_retries = MEC_RETRIES
+            vnffg_retries = VNFFG_RETRIES
+            mes_mapping = self.get_mes(context, mes_id)['mes_mapping']
+            # Check MECA
+            meca_id = mes_mapping['MECA']
+            while mec_status == "PENDING_CREATE" and mec_retries > 0:
+                time.sleep(MEC_RETRY_WAIT)
+                mec_status = meo_plugin.get_meca(context, meca_id)['status']
+                LOG.debug('status: %s', mec_status)
+                if mec_status == 'ACTIVE' or mec_status == 'ERROR':
+                    break
+                mec_retries = mec_retries - 1
+            error_reason = None
+            if mec_retries == 0 and mec_status == 'PENDING_CREATE':
+                error_reason = _(
+                    "MES creation is not completed within"
+                    " {wait} seconds as creation of MECA").format(
+                    wait=MEC_RETRIES * MEC_RETRY_WAIT)
+            # Check NS/VNFFG status
+            if mes_mapping.get('NS'):
+                ns_list = mes_mapping['NS']
+                while ns_status == "PENDING_CREATE" and ns_retries > 0:
+                    time.sleep(NS_RETRY_WAIT)
+                    # Todo: support multiple NSs
+                    ns_instance = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'ns_get',
+                        ns_id=ns_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    ns_status = ns_instance['status']
+                    LOG.debug('status: %s', ns_status)
+                    if ns_status == 'ACTIVE' or ns_status == 'ERROR':
+                        break
+                    ns_retries = ns_retries - 1
+                error_reason = None
+                if ns_retries == 0 and ns_status == 'PENDING_CREATE':
+                    error_reason = _(
+                        "MES creation is not completed within"
+                        " {wait} seconds as creation of NS(s)").format(
+                        wait=NS_RETRIES * NS_RETRY_WAIT)
+
+                # Determine args
+                ns_cd = self._nfv_drivers.invoke(
+                    nfv_driver,  # How to tell it is Tacker
+                    'ns_get',
+                    ns_id=ns_list[0],
+                    auth_attr=vim_res['vim_auth'], )
+                ns_instance_dict = ns_cd['mgmt_urls']
+                ns_instance_list = ast.literal_eval(ns_instance_dict)
+                args['NS'] = dict()
+
+                for vnf_name, mgmt_url_list in ns_instance_list.items():
+                    # Todo: remember to change this with VM capacity
+                    vm_capacity = VM_CAPA[vnf_name]
+                    orig = [vm_capacity] * len(mgmt_url_list)
+                    args['NS'][vnf_name] = [(val - 1) for val in orig]
+
+            if mes_mapping.get('VNFFG'):
+                while vnffg_status == "PENDING_CREATE" and vnffg_retries > 0:
+                    time.sleep(VNFFG_RETRY_WAIT)
+                    vnffg_list = mes_mapping['VNFFG']
+                    # Todo: support multiple VNFFGs
+                    vnffg_instance = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'vnffg_get',
+                        vnffg_id=vnffg_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    vnffg_status = vnffg_instance['status']
+                    LOG.debug('status: %s', vnffg_status)
+                    if vnffg_status == 'ACTIVE' or vnffg_status == 'ERROR':
+                        break
+                    vnffg_retries = vnffg_retries - 1
+                error_reason = None
+                if vnffg_retries == 0 and vnffg_status == 'PENDING_CREATE':
+                    error_reason = _(
+                        "MES creation is not completed within"
+                        " {wait} seconds as creation of VNFFG(s)").format(
+                        wait=VNFFG_RETRIES * VNFFG_RETRY_WAIT)
+            if mec_status == "ERROR" or ns_status == "ERROR" or vnffg_status == "ERROR":   # noqa
+                mes_status = "ERROR"
+            if error_reason:
+                mes_status = "PENDING_CREATE"
+
+            super(MesoPlugin, self).create_mes_post(context, mes_id, mes_status, error_reason, args)   # noqa
+        self.spawn_n(_create_mes_wait, self, mes_dict['id'])
+        return mes_dict
+
+    @log.log
+    def _update_params(self, original, paramvalues):
+        for key, value in (original).items():
+            if not isinstance(value, dict) or 'get_input' not in str(value):
+                pass
+            elif isinstance(value, dict):
+                if 'get_input' in value:
+                    if value['get_input'] in paramvalues:
+                        original[key] = paramvalues[value['get_input']]
+                    else:
+                        LOG.debug('Key missing Value: %s', key)
+                        raise cs.InputValuesMissing(key=key)
+                else:
+                    self._update_params(value, paramvalues)
+
+    @log.log
+    def _process_parameterized_input(self, attrs, mesd_dict):
+        param_vattrs_dict = attrs.pop('param_values', None)
+        if param_vattrs_dict:
+            for node in \
+                    mesd_dict['topology_template']['node_templates'].values():
+                if 'get_input' in str(node):
+                    self._update_params(node, param_vattrs_dict['mesd'])
+        else:
+            raise cs.ParamYAMLInputMissing()
+
+    @log.log
+    def delete_mes(self, context, mes_id):
+        mes = super(MesoPlugin, self).get_mes(context, mes_id)
+        mesd = self.get_mesd(context, mes['mesd_id'])
+        mesd_dict = yaml.safe_load(mesd['attributes']['mesd'])
+        vim_res = self.vim_client.get_vim(context, mes['vim_id'])
+        mes_mapping = mes['mes_mapping']
+        meca_id = mes_mapping['MECA']
+        meo_plugin = manager.ApmecManager.get_service_plugins()['MEO']
+        try:
+            meca_id = meo_plugin.delete_meca(context, meca_id)
+        except Exception as e:
+            LOG.error('Error while deleting the MECA(s): %s', e)
+
+        if mes_mapping.get('NS'):
+            # Todo: support multiple NSs
+            ns_id = mes_mapping['NS'][0]
+            nfv_driver = None
+            if mesd_dict['imports'].get('nsds'):
+                nfv_driver = mesd_dict['imports']['nsds']['nfv_driver']
+                nfv_driver = nfv_driver.lower()
+            if not nfv_driver:
+                raise meso.NFVDriverNotFound(mesd_name=mesd_dict['name'])
+            try:
+                self._nfv_drivers.invoke(
+                    nfv_driver,
+                    'ns_delete',
+                    ns_id=ns_id,
+                    auth_attr=vim_res['vim_auth'])
+            except Exception as e:
+                LOG.error('Error while deleting the NS(s): %s', e)
+        if mes_mapping.get('VNFFG'):
+            # Todo: support multiple VNFFGs
+            vnffg_id = mes_mapping['VNFFG'][0]
+            nfv_driver = None
+            if mesd_dict['imports'].get('vnffgds'):
+                nfv_driver = mesd_dict['imports']['vnffgds']['nfv_driver']
+                nfv_driver = nfv_driver.lower()
+            if not nfv_driver:
+                raise meso.NFVDriverNotFound(mesd_name=mesd_dict['name'])
+            try:
+                self._nfv_drivers.invoke(
+                    nfv_driver,
+                    'vnffg_delete',
+                    vnffg_id=vnffg_id,
+                    auth_attr=vim_res['vim_auth'])
+            except Exception as e:
+                LOG.error('Error while deleting the VNFFG(s): %s', e)
+
+        super(MesoPlugin, self).delete_mes(context, mes_id)
+
+        def _delete_mes_wait(mes_id):
+            ns_status = "PENDING_DELETE"
+            vnffg_status = "PENDING_DELETE"
+            mec_status = "PENDING_DELETE"
+            ns_retries = NS_RETRIES
+            mec_retries = MEC_RETRIES
+            vnffg_retries = VNFFG_RETRIES
+            error_reason_meca = None
+            error_reason_ns = None
+            error_reason_vnffg = None
+            # Check MECA
+            while mec_status == "PENDING_DELETE" and mec_retries > 0:
+                time.sleep(MEC_RETRY_WAIT)
+                meca_id = mes_mapping['MECA']
+                meca_list = meo_plugin.get_mecas(context)
+                is_deleted = True
+                for meca in meca_list:
+                    if meca_id in meca['id']:
+                        is_deleted = False
+                if is_deleted:
+                    break
+                mec_status = meo_plugin.get_meca(context, meca_id)['status']
+                LOG.debug('status: %s', mec_status)
+                if mec_status == 'ERROR':
+                    break
+                mec_retries = mec_retries - 1
+            if mec_retries == 0 and mec_status == 'PENDING_DELETE':
+                error_reason_meca = _(
+                    "MES deletion is not completed within"
+                    " {wait} seconds as deletion of MECA").format(
+                    wait=MEC_RETRIES * MEC_RETRY_WAIT)
+            # Check NS/VNFFG status
+            if mes_mapping.get('NS'):
+                while ns_status == "PENDING_DELETE" and ns_retries > 0:
+                    time.sleep(NS_RETRY_WAIT)
+                    ns_list = mes_mapping['NS']
+                    # Todo: support multiple NSs
+                    is_existed = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'ns_check',
+                        ns_id=ns_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    if not is_existed:
+                        break
+                    ns_instance = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'ns_get',
+                        ns_id=ns_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    ns_status = ns_instance['status']
+                    LOG.debug('status: %s', ns_status)
+                    if ns_status == 'ERROR':
+                        break
+                    ns_retries = ns_retries - 1
+                if ns_retries == 0 and ns_status == 'PENDING_DELETE':
+                    error_reason_ns = _(
+                        "MES deletion is not completed within"
+                        " {wait} seconds as deletion of NS(s)").format(
+                        wait=NS_RETRIES * NS_RETRY_WAIT)
+            if mes_mapping.get('VNFFG'):
+                while vnffg_status == "PENDING_DELETE" and vnffg_retries > 0:
+                    time.sleep(VNFFG_RETRY_WAIT)
+                    vnffg_list = mes_mapping['VNFFG']
+                    # Todo: support multiple VNFFGs
+                    is_existed = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'vnffg_check',
+                        vnffg_id=vnffg_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    if not is_existed:
+                        break
+                    vnffg_instance = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'vnffg_get',
+                        vnffg_id=vnffg_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    vnffg_status = vnffg_instance['status']
+                    LOG.debug('status: %s', vnffg_status)
+                    if vnffg_status == 'ERROR':
+                        break
+                    vnffg_retries = vnffg_retries - 1
+                if vnffg_retries == 0 and vnffg_status == 'PENDING_DELETE':
+                    error_reason_vnffg = _(
+                        "MES deletion is not completed within"
+                        " {wait} seconds as deletion of VNFFG(s)").format(
+                        wait=VNFFG_RETRIES * VNFFG_RETRY_WAIT)
+            error = False
+            if mec_status == "ERROR" or ns_status == "ERROR" or vnffg_status == "ERROR":    # noqa
+                error = True
+            error_reason = None
+            for reason in [error_reason_meca, error_reason_ns, error_reason_vnffg]:    # noqa
+                error_reason = reason if reason else None
+
+            super(MesoPlugin, self).delete_mes_post(
+                context, mes_id, error_reason=error_reason, error=error)
+        self.spawn_n(_delete_mes_wait, mes['id'])
+        return mes['id']
+
+    def update_mes(self, context, mes_id, mes):
+        args = dict()
+        mes_info = mes['mes']
+        old_mes = super(MesoPlugin, self).get_mes(context, mes_id)
+        name = old_mes['name']
+        lftover = dict()
+        # vm_capacity = 3
+        # create inline mesd if given by user
+
+        def _update_nsd_template(req_mesd_dict):
+            build_nsd_dict = dict()
+            if req_mesd_dict['imports'].get('nsds'):
+                args['NS'] = dict()
+                # Todo: Support multiple NSs
+                # For framework evaluation
+                nsd_templates = req_mesd_dict['imports']['nsds']['nsd_templates']      # noqa
+                if isinstance(nsd_templates, dict):
+                    if nsd_templates.get('requirements'):
+                        old_reused = old_mes['reused']
+                        vnf_mapping_list = nsd_templates['requirements']
+                        for vnf_mapping_dict in vnf_mapping_list:
+                            for old_vnf_name, old_nfins_list in old_reused.items():     # noqa
+                                if vnf_mapping_dict['name'] == old_vnf_name:
+                                    len_diff = len([lend for lend in old_nfins_list if lend > 0])    # noqa
+                                    diff = len_diff - vnf_mapping_dict['nf_ins']           # noqa
+                                    if diff < 0:
+                                        lftover.update({old_vnf_name: -diff})
+                                        vm_capacity = VM_CAPA[old_vnf_name]
+                                        old_reused[old_vnf_name].extend([vm_capacity] * (-diff))       # noqa
+                                    # old_reused[old_vnf_name] = diff
+                                    temp = vnf_mapping_dict['nf_ins']
+                                    for index, nfins in enumerate(old_nfins_list):      # noqa
+                                        if nfins > 0:
+                                            old_nfins_list[index] = old_nfins_list[index] - 1     # noqa
+                                            temp = temp - 1
+                                        if temp == 0:
+                                            break
+
+                formal_req = list()
+                for nf_name, nf_ins in lftover.items():
+                    vnfd_name = 'vnfd' + nf_name[3] + str(nf_ins)
+                    formal_req.append(vnfd_name)
+
+                if formal_req:
+                    build_nsd_dict['tosca_definitions_version'] = 'tosca_simple_profile_for_nfv_1_0_0'   # noqa
+                    build_nsd_dict['description'] = old_mes['description']
+                    build_nsd_dict['imports'] = formal_req
+                    build_nsd_dict['topology_template'] = dict()
+                    build_nsd_dict['topology_template']['node_templates'] = dict()    # noqa
+                    for nf_name, nf_ins in lftover.items():
+                        node = 'tosca.nodes.nfv.' + nf_name
+                        node_dict = dict()
+                        node_dict['type'] = node
+                        build_nsd_dict['topology_template']['node_templates'].update({nf_name: node_dict})    # noqa
+            return build_nsd_dict
+
+        if mes_info.get('mesd_template'):
+            # Build vnf_dict here
+            mes_name = utils.generate_resource_name(name, 'inline')
+            mesd = {'mesd': {'tenant_id': old_mes['tenant_id'],
+                           'name': mes_name,
+                           'attributes': {
+                               'mesd': mes_info['mesd_template']},
+                           'template_source': 'inline',
+                           'description': old_mes['description']}}
+            try:
+                mes_info['mesd_id'] = \
+                    self.create_mesd(context, mesd).get('id')
+            except Exception:
+                with excutils.save_and_reraise_exception():
+                    super(MesoPlugin, self)._update_mes_status(context, mes_id, constants.ACTIVE)      # noqa
+
+        mesd = self.get_mesd(context, mes_info['mesd_id'])
+        mesd_dict = yaml.safe_load(mesd['attributes']['mesd'])
+        new_mesd_mapping = mesd['mesd_mapping']
+        region_name = mes.setdefault('placement_attr', {}).get(
+            'region_name', None)
+        vim_res = self.vim_client.get_vim(context, old_mes['vim_id'],
+                                          region_name)
+
+        if mesd_dict['imports'].get('meads'):
+            # Update MECA
+            meo_plugin = manager.ApmecManager.get_service_plugins()['MEO']
+            # Build the MECA template here
+            mead_tpl_dict = dict()
+            mead_tpl_dict['imports'] =\
+                mesd_dict['imports']['meads']['mead_templates']
+            mecad_dict = copy.deepcopy(mesd_dict)
+            mecad_dict.pop('imports')
+            mecad_dict.update(mead_tpl_dict)
+            mecad_arg = {'meca': {'mecad_template': mecad_dict}}
+            old_meca_id = old_mes['mes_mapping']['MECA']
+            meca_id = meo_plugin.update_meca(context, old_meca_id, mecad_arg)     # noqa
+
+        if mesd_dict['imports'].get('nsds'):
+            nfv_driver = None
+            nfv_driver = mesd_dict['imports']['nsds'].get('nfv_driver')
+            if not nfv_driver:
+                raise meso.NFVDriverNotFound(mesd_name=mesd_dict['name'])
+            nfv_driver = nfv_driver.lower()
+
+            req_mesd_dict = yaml.safe_load(mes_info['mesd_template'])
+            new_nsd_template = _update_nsd_template(req_mesd_dict)
+            nsd_template = None
+            if isinstance(new_mesd_mapping.get('NSD'), list):
+                nsd_name = new_mesd_mapping['NSD'][0]
+                nsd_dict = self._nfv_drivers.invoke(
+                    nfv_driver,  # How to tell it is Tacker
+                    'nsd_get_by_name',
+                    nsd_name=nsd_name,
+                    auth_attr=vim_res['vim_auth'], )
+                nsd_template = yaml.safe_load(nsd_dict['attributes']['nsd'])
+            actual_nsd_template = new_nsd_template if new_nsd_template else nsd_template      # noqa
+            if actual_nsd_template:
+                old_ns_id = old_mes['mes_mapping']['NS'][0]
+                ns_arg = {'ns': {'nsd_template': actual_nsd_template}}
+                self._nfv_drivers.invoke(
+                    nfv_driver,  # How to tell it is Tacker
+                    'ns_update',
+                    ns_id=old_ns_id,
+                    ns_dict=ns_arg,
+                    auth_attr=vim_res['vim_auth'], )
+
+        if mesd_dict['imports'].get('vnffgds'):
+            # Todo: Support multiple VNFFGs
+            nfv_driver = None
+            nfv_driver = mesd_dict['imports']['nsds'].get('nfv_driver')
+            if not nfv_driver:
+                raise meso.NFVDriverNotFound(mesd_name=mesd_dict['name'])
+            nfv_driver = nfv_driver.lower()
+            vnffgd_name = new_mesd_mapping['VNFFGD'][0]
+            vnffgd_dict = self._nfv_drivers.invoke(
+                nfv_driver,  # How to tell it is Tacker
+                'vnffgd_get_by_name',
+                vnffgd_name=vnffgd_name,
+                auth_attr=vim_res['vim_auth'], )
+            vnffgd_template = yaml.safe_load(
+                vnffgd_dict['attributes']['vnffgd'])
+            old_vnffg_id = old_mes['mes_mapping']['VNFFG'][0]
+            vnffg_arg = {'vnffg': {'vnffgd_template': vnffgd_template}}
+            self._nfv_drivers.invoke(
+                nfv_driver,
+                'vnffg_update',
+                vnffg_id=old_vnffg_id,
+                vnffg_dict=vnffg_arg,
+                auth_attr=vim_res['vim_auth'], )
+
+        mes_dict = super(MesoPlugin, self)._update_mes_pre(context, mes_id)
+
+        def _update_mes_wait(self_obj, mes_id):
+            args = dict()
+            mes_status = "ACTIVE"
+            ns_status = "PENDING_UPDATE"
+            vnffg_status = "PENDING_UPDATE"
+            mec_status = "PENDING_UPDATE"
+            ns_retries = NS_RETRIES
+            mec_retries = MEC_RETRIES
+            vnffg_retries = VNFFG_RETRIES
+            error_reason_meca = None
+            error_reason_ns = None
+            error_reason_vnffg = None
+            # Check MECA
+            if mesd_dict['imports'].get('meads'):
+                while mec_status == "PENDING_UPDATE" and mec_retries > 0:
+                    time.sleep(MEC_RETRY_WAIT)
+                    meca_id = old_mes['mes_mapping']['MECA']
+                    meca_list = meo_plugin.get_mecas(context)
+                    is_deleted = True
+                    for meca in meca_list:
+                        if meca_id in meca['id']:
+                            is_deleted = False
+                    if is_deleted:
+                        break
+                    mec_status = meo_plugin.get_meca(context, meca_id)['status']         # noqa
+                    LOG.debug('status: %s', mec_status)
+                    if mec_status == 'ERROR':
+                        break
+                    mec_retries = mec_retries - 1
+                if mec_retries == 0 and mec_status == 'PENDING_UPDATE':
+                    error_reason_meca = _(
+                        "MES update is not completed within"
+                        " {wait} seconds as update of MECA").format(
+                        wait=MEC_RETRIES * MEC_RETRY_WAIT)
+            # Check NS/VNFFG status
+            if mesd_dict['imports'].get('nsds'):
+                while ns_status == "PENDING_UPDATE" and ns_retries > 0:
+                    time.sleep(NS_RETRY_WAIT)
+                    ns_list = old_mes['mes_mapping']['NS']
+                    # Todo: support multiple NSs
+                    is_existed = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'ns_check',
+                        ns_id=ns_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    if not is_existed:
+                        break
+                    ns_instance = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'ns_get',
+                        ns_id=ns_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    ns_status = ns_instance['status']
+                    LOG.debug('status: %s', ns_status)
+                    if ns_status == 'ERROR':
+                        break
+                    ns_retries = ns_retries - 1
+                if ns_retries == 0 and ns_status == 'PENDING_UPDATE':
+                    error_reason_ns = _(
+                        "MES update is not completed within"
+                        " {wait} seconds as update of NS(s)").format(
+                        wait=NS_RETRIES * NS_RETRY_WAIT)
+
+            if mesd_dict['imports'].get('vnffgds'):
+                while vnffg_status == "PENDING_UPDATE" and vnffg_retries > 0:
+                    time.sleep(VNFFG_RETRY_WAIT)
+                    vnffg_list = old_mes['mes_mapping']['VNFFG']
+                    # Todo: support multiple VNFFGs
+                    is_existed = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'vnffg_check',
+                        vnffg_id=vnffg_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    if not is_existed:
+                        break
+                    vnffg_instance = self._nfv_drivers.invoke(
+                        nfv_driver,  # How to tell it is Tacker
+                        'vnffg_get',
+                        vnffg_id=vnffg_list[0],
+                        auth_attr=vim_res['vim_auth'], )
+                    vnffg_status = vnffg_instance['status']
+                    LOG.debug('status: %s', vnffg_status)
+                    if vnffg_status == 'ERROR':
+                        break
+                    vnffg_retries = vnffg_retries - 1
+                if vnffg_retries == 0 and vnffg_status == 'PENDING_UPDATE':
+                    error_reason_vnffg = _(
+                        "MES update is not completed within"
+                        " {wait} seconds as update of VNFFG(s)").format(
+                        wait=VNFFG_RETRIES * VNFFG_RETRY_WAIT)
+            args['NS'] = old_mes['reused']
+            if mec_status == "ERROR" or ns_status == "ERROR" or vnffg_status == "ERROR":        # noqa
+                mes_status = "ERROR"
+            error_reason = None
+            for reason in [error_reason_meca, error_reason_ns, error_reason_vnffg]:       # noqa
+                if reason:
+                    error_reason = reason
+                    mes_status = "PENDING_UPDATE"
+            super(MesoPlugin, self)._update_mes_post(context, mes_id, error_reason, mes_status, args)      # noqa
+
+        self.spawn_n(_update_mes_wait, self, mes_dict['id'])
+        return mes_dict

etc/config-generator.conf

@@ -4,6 +4,8 @@ wrap_width = 79
 namespace = apmec.common.config
 namespace = apmec.wsgi
 namespace = apmec.service
+namespace = apmec.meso.meso_plugin
+namespace = apmec.meso.drivers.nfv_drivers.tacker_driver
 namespace = apmec.meo.meo_plugin
 namespace = apmec.meo.drivers.vim.openstack_driver
 namespace = apmec.keymgr

setup.cfg

@@ -44,7 +44,10 @@ apmec.service_plugins =
     dummy = apmec.tests.unit.dummy_plugin:DummyServicePlugin
     mem = apmec.mem.plugin:MEMPlugin
     meo = apmec.meo.meo_plugin:MeoPlugin
+    meso = apmec.meso.meso_plugin:MesoPlugin
     commonservices = apmec.plugins.common_services.common_services_plugin:CommonServicesPlugin
+apmec.meso.drivers =
+    tacker = apmec.meso.drivers.nfv_drivers.tacker_driver:Tacker_Driver
 apmec.meo.vim.drivers =
     openstack = apmec.meo.drivers.vim.openstack_driver:OpenStack_Driver
 apmec.openstack.common.cache.backends =
@@ -71,6 +74,8 @@ oslo.config.opts =
     apmec.service = apmec.service:config_opts
     apmec.meo.meo_plugin = apmec.meo.meo_plugin:config_opts
     apmec.meo.drivers.vim.openstack_driver = apmec.meo.drivers.vim.openstack_driver:config_opts
+    apmec.meso.meso_plugin = apmec.meso.meso_plugin:config_opts
+    apmec.mseo.drivers.nfv_drivers.tacker_driver = apmec.meso.drivers.nfv_drivers.tacker_driver:config_opts
     apmec.keymgr = apmec.keymgr:config_opts
     apmec.mem.monitor = apmec.mem.monitor:config_opts
     apmec.mem.plugin = apmec.mem.plugin:config_opts