Implementation Fenix plugin in Tacker

Add fenix plugin for host maintenance.
This feature creates plugin for fenix, create_vnf_maintenance() in VNFM and
VNFMaintenanceAlarmMonitor to create alarm for Fenix. And the feature modifies
alarm_receiver and CRUD in VNFM.

After this feature, all VNF has ALL_MAINTENANCE resource to interacts
with Fenix plugin and [VDU_NAME]_MAINTENANCE if VDU has maintenance property.
[VDU_NAME]_MAINTENANCE will use to perform VNF software modification.

Currently, the plugin can perform CRUD constraints for maintenance,
scale in/out and migration for MIGRATE and LIVE_MIGRATE. The feature has
functions for OWN_ACTION with modified healing, but it not works based on
default vnf workflow in Fenix. And The feature doesn't support server_group
and related with HA like switch over because of unsupported in Tacker.
So these features will be enhance after adding required.

Co-Authored-By: Hyunsik Yang <yangun@dcn.ssu.ac.kr>

Implements: blueprint vnf-rolling-upgrade
Change-Id: I34b82fd40830dd74d0f5ef24a60b3ff465cd4819

.zuul.yaml

@@ -67,6 +67,7 @@
       - openstack/python-tackerclient
       - openstack/tacker
       - openstack/tacker-horizon
+      - x/fenix
     vars:
       devstack_localrc:
         CELLSV2_SETUP: singleconductor
@@ -93,6 +94,7 @@
           mistral: https://opendev.org/openstack/mistral
           tacker: https://opendev.org/openstack/tacker
           blazar: https://opendev.org/openstack/blazar
+          fenix: https://opendev.org/x/fenix
         devstack_services:
           # Core services enabled for this branch.
           # This list replaces the test-matrix.

devstack/lib/tacker

@@ -81,6 +81,7 @@ TACKER_NOVA_CA_CERTIFICATES_FILE=${TACKER_NOVA_CA_CERTIFICATES_FILE:-}
 TACKER_NOVA_API_INSECURE=${TACKER_NOVA_API_INSECURE:-False}
 
 HEAT_CONF_DIR=/etc/heat
+CEILOMETER_CONF_DIR=/etc/ceilometer
 
 source ${TACKER_DIR}/tacker/tests/contrib/post_test_hook_lib.sh
 
@@ -480,3 +481,11 @@ function modify_heat_flavor_policy_rule {
     # Allow non-admin projects with 'admin' roles to create flavors in Heat
     echo '"resource_types:OS::Nova::Flavor": "role:admin"' >> $policy_file
 }
+
+function configure_maintenance_event_types {
+    local event_definitions_file=$CEILOMETER_CONF_DIR/event_definitions.yaml
+    local maintenance_events_file=$TACKER_DIR/etc/ceilometer/maintenance_event_types.yaml
+
+    echo "Configure maintenance event types to $event_definitions_file"
+    cat $maintenance_events_file >> $event_definitions_file
+}

devstack/local.conf.example

@@ -43,12 +43,16 @@ enable_plugin mistral https://opendev.org/openstack/mistral master
 
 # Ceilometer
 #CEILOMETER_PIPELINE_INTERVAL=300
+CEILOMETER_EVENT_ALARM=True
 enable_plugin ceilometer https://opendev.org/openstack/ceilometer master
 enable_plugin aodh https://opendev.org/openstack/aodh master
 
 # Blazar
 enable_plugin blazar https://github.com/openstack/blazar.git master
 
+# Fenix
+enable_plugin fenix https://opendev.org/x/fenix.git master
+
 # Tacker
 enable_plugin tacker https://opendev.org/openstack/tacker master
 

devstack/plugin.sh

@@ -41,6 +41,11 @@ if is_service_enabled tacker; then
             tacker_check_and_download_images
             echo_summary "Registering default VIM"
             tacker_register_default_vim
+
+            if is_service_enabled ceilometer; then
+                echo_summary "Configure maintenance event types"
+                configure_maintenance_event_types
+            fi
         fi
     fi
 

doc/source/reference/index.rst

@@ -24,3 +24,4 @@ Reference
    mistral_workflows_usage_guide.rst
    block_storage_usage_guide.rst
    reservation_policy_usage_guide.rst
+   maintenance_usage_guide.rst

doc/source/reference/maintenance_usage_guide.rst

@@ -0,0 +1,183 @@
+..
+      Copyright 2020 Distributed Cloud and Network (DCN)
+
+      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.
+
+================================
+VNF zero impact host maintenance
+================================
+
+Tacker allows you to maintenance host with VNF zero impact. Maintenance
+workflows will be performed in the ``Fenix`` service by creating a session
+which can do scaling, migrating VNFs and patch hosts.
+
+
+References
+~~~~~~~~~~
+
+- `Fenix   <https://fenix.readthedocs.io/en/latest/>`_.
+- `Fenix Configuration Guide <https://fenix.readthedocs.io/en/latest/configuration/dependencies.html>`_.
+
+Installation and configurations
+-------------------------------
+
+1. You need Fenix, Ceilometer and Aodh OpenStack services.
+
+2. Modify the below configuration files:
+
+/etc/ceilometer/event_pipeline.yaml
+
+.. code-block:: yaml
+
+    sinks:
+      - name: event_sink
+        publishers:
+            - panko://
+            - notifier://
+            - notifier://?topic=alarm.all
+
+/etc/ceilometer/event_definitions.yaml:
+
+.. code-block:: yaml
+
+    - event_type: 'maintenance.scheduled'
+      traits:
+        service:
+          fields: payload.service
+        allowed_actions:
+          fields: payload.allowed_actions
+        instance_ids:
+          fields: payload.instance_ids
+        reply_url:
+          fields: payload.reply_url
+        state:
+          fields: payload.state
+        session_id:
+          fields: payload.session_id
+        actions_at:
+          fields: payload.actions_at
+          type: datetime
+        project_id:
+          fields: payload.project_id
+        reply_at:
+          fields: payload.reply_at
+          type: datetime
+        metadata:
+          fields: payload.metadata
+    - event_type: 'maintenance.host'
+      traits:
+        host:
+          fields: payload.host
+        project_id:
+          fields: payload.project_id
+        session_id:
+          fields: payload.session_id
+        state:
+          fields: payload.state
+
+
+Deploying maintenance tosca template with tacker
+------------------------------------------------
+
+When template is normal
+~~~~~~~~~~~~~~~~~~~~~~~
+
+If ``Fenix`` service is enabled and maintenance event_types are defined, then
+all VNF created by legacy VNFM will get ``ALL_MAINTENANCE`` resource in Stack.
+
+.. code-block:: yaml
+
+    resources:
+      ALL_maintenance:
+        properties:
+          alarm_actions:
+          - http://openstack-master:9890/v1.0/vnfs/e8b9bec5-541b-492c-954e-cd4af71eda1f/maintenance/0cc65f4bba9c42bfadf4aebec6ae7348/hbyhgkav
+          event_type: maintenance.scheduled
+        type: OS::Aodh::EventAlarm
+
+When template has maintenance property
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If VDU in VNFD has maintenance property, then VNFM creates
+``[VDU_NAME]_MAINTENANCE`` alarm resources and will be use for VNF software
+modification later. This is not works yet. It will be updated.
+
+``Sample tosca-template``:
+
+.. code-block:: yaml
+
+    tosca_definitions_version: tosca_simple_profile_for_nfv_1_0_0
+
+    description: VNF TOSCA template with maintenance
+
+    metadata:
+      template_name: sample-tosca-vnfd-maintenance
+
+    topology_template:
+      node_templates:
+        VDU1:
+          type: tosca.nodes.nfv.VDU.Tacker
+          properties:
+            maintenance: True
+            image: cirros-0.4.0-x86_64-disk
+            capabilities:
+              nfv_compute:
+                properties:
+                  disk_size: 1 GB
+                  mem_size: 512 MB
+                  num_cpus: 2
+
+        CP1:
+          type: tosca.nodes.nfv.CP.Tacker
+          properties:
+            management: true
+            order: 0
+            anti_spoofing_protection: false
+          requirements:
+            - virtualLink:
+                node: VL1
+            - virtualBinding:
+                node: VDU1
+
+        VL1:
+          type: tosca.nodes.nfv.VL
+          properties:
+            network_name: net_mgmt
+            vendor: Tacker
+
+      policies:
+        - SP1:
+            type: tosca.policies.tacker.Scaling
+            properties:
+              increment: 1
+              cooldown: 120
+              min_instances: 1
+              max_instances: 3
+              default_instances: 2
+            targets: [VDU1]
+
+
+Configure maintenance constraints with config yaml
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+When ``Fenix`` does maintenance, it requires some constraints for zero impact.
+Like below config file, each VNF can set and update constraints.
+
+.. code-block:: yaml
+
+    maintenance:
+      max_impacted_members: 1
+      recovery_time: 60,
+      mitigation_type: True,
+      lead_time: 120,
+      migration_type: 'MIGRATE'

etc/ceilometer/maintenance_event_types.yaml

@@ -0,0 +1,34 @@
+- event_type: 'maintenance.scheduled'
+  traits:
+    service:
+      fields: payload.service
+    allowed_actions:
+      fields: payload.allowed_actions
+    instance_ids:
+      fields: payload.instance_ids
+    reply_url:
+      fields: payload.reply_url
+    state:
+      fields: payload.state
+    session_id:
+      fields: payload.session_id
+    actions_at:
+      fields: payload.actions_at
+      type: datetime
+    project_id:
+      fields: payload.project_id
+    reply_at:
+      fields: payload.reply_at
+      type: datetime
+    metadata:
+      fields: payload.metadata
+- event_type: 'maintenance.host'
+  traits:
+    host:
+      fields: payload.host
+    project_id:
+      fields: payload.project_id
+    session_id:
+      fields: payload.session_id
+    state:
+      fields: payload.state

setup.cfg

@@ -93,6 +93,8 @@ oslo.config.opts =
     tacker.vnfm.monitor_drivers.ceilometer.ceilometer = tacker.vnfm.monitor_drivers.ceilometer.ceilometer:config_opts
     tacker.vnfm.monitor_drivers.zabbix.zabbix = tacker.vnfm.monitor_drivers.zabbix.zabbix:config_opts
     tacker.alarm_receiver = tacker.alarm_receiver:config_opts
+    tacker.plugins.fenix = tacker.plugins.fenix:config_opts
+
 mistral.actions =
     tacker.vim_ping_action = tacker.nfvo.workflows.vim_monitor.vim_ping_action:PingVimAction
 

tacker/alarm_receiver.py

@@ -52,6 +52,8 @@ class AlarmReceiver(wsgi.Middleware):
         if not self.handle_url(url):
             return
         prefix, info, params = self.handle_url(req.url)
+        resource = 'trigger' if info[4] != 'maintenance' else 'maintenance'
+        redirect = resource + 's'
         auth = cfg.CONF.keystone_authtoken
         alarm_auth = cfg.CONF.alarm_auth
         token = Token(username=alarm_auth.username,
@@ -66,19 +68,24 @@ class AlarmReceiver(wsgi.Middleware):
         # Change the body request
         if req.body:
             body_dict = dict()
-            body_dict['trigger'] = {}
+            body_dict[resource] = {}
-            body_dict['trigger'].setdefault('params', {})
+            body_dict[resource].setdefault('params', {})
             # Update params in the body request
             body_info = jsonutils.loads(req.body)
-            body_dict['trigger']['params']['data'] = body_info
+            body_dict[resource]['params']['credential'] = info[6]
-            body_dict['trigger']['params']['credential'] = info[6]
+            if resource == 'maintenance':
+                body_info.update({
+                    'body': self._handle_maintenance_body(body_info)})
+                del body_info['reason_data']
+            else:
                 # Update policy and action
-            body_dict['trigger']['policy_name'] = info[4]
+                body_dict[resource]['policy_name'] = info[4]
-            body_dict['trigger']['action_name'] = info[5]
+                body_dict[resource]['action_name'] = info[5]
+            body_dict[resource]['params']['data'] = body_info
             req.body = jsonutils.dump_as_bytes(body_dict)
             LOG.debug('Body alarm: %s', req.body)
         # Need to change url because of mandatory
-        req.environ['PATH_INFO'] = prefix + 'triggers'
+        req.environ['PATH_INFO'] = prefix + redirect
         req.environ['QUERY_STRING'] = ''
         LOG.debug('alarm url in receiver: %s', req.url)
 
@@ -98,3 +105,15 @@ class AlarmReceiver(wsgi.Middleware):
         prefix_url = '/%(collec)s/%(vnf_uuid)s/' % {'collec': p[2],
                                                     'vnf_uuid': p[3]}
         return prefix_url, p, params
+
+    def _handle_maintenance_body(self, body_info):
+        body = {}
+        traits_list = body_info['reason_data']['event']['traits']
+        if type(traits_list) is not list:
+            return
+        for key, t_type, val in traits_list:
+            if t_type == 1 and val and (val[0] == '[' or val[0] == '{'):
+                body[key] = eval(val)
+            else:
+                body[key] = val
+        return body

tacker/extensions/vnfm.py

@@ -208,6 +208,10 @@ class InvalidInstReqInfoForScaling(exceptions.InvalidInput):
                 "fixed ip_address or mac_address.")
 
 
+class InvalidMaintenanceParameter(exceptions.InvalidInput):
+    message = _("Could not find the required params for maintenance")
+
+
 def _validate_service_type_list(data, valid_values=None):
     if not isinstance(data, list):
         msg = _("Invalid data format for service list: '%s'") % data
@@ -491,6 +495,37 @@ SUB_RESOURCE_ATTRIBUTE_MAP = {
                 }
             }
         }
+    },
+    'maintenances': {
+        'parent': {
+            'collection_name': 'vnfs',
+            'member_name': 'vnf'
+        },
+        'members': {
+            'maintenance': {
+                'parameters': {
+                    'params': {
+                        'allow_post': True,
+                        'allow_put': False,
+                        'is_visible': True,
+                        'validate': {'type:dict_or_none': None}
+                    },
+                    'tenant_id': {
+                        'allow_post': True,
+                        'allow_put': False,
+                        'validate': {'type:string': None},
+                        'required_by_policy': False,
+                        'is_visible': False
+                    },
+                    'response': {
+                        'allow_post': False,
+                        'allow_put': False,
+                        'validate': {'type:dict_or_none': None},
+                        'is_visible': True
+                    }
+                }
+            }
+        }
     }
 }
 
@@ -623,3 +658,7 @@ class VNFMPluginBase(service_base.NFVPluginBase):
     def create_vnf_trigger(
             self, context, vnf_id, trigger):
         pass
+
+    @abc.abstractmethod
+    def create_vnf_maintenance(self, context, vnf_id, maintenance):
+        pass

tacker/objects/heal_vnf_request.py

@@ -36,11 +36,13 @@ class HealVnfRequest(base.TackerObject):
 
     # Version 1.0: Initial version
     # Version 1.1: Added vnf_instance_id
-    VERSION = '1.1'
+    # Version 1.2: Added stack_id for nested heat-template
+    VERSION = '1.2'
 
     fields = {
         'vnfc_instance_id': fields.ListOfStringsField(nullable=True,
                                                       default=[]),
+        'stack_id': fields.StringField(nullable=True, default=''),
         'cause': fields.StringField(nullable=True, default=None),
         'additional_params': fields.ListOfObjectsField(
             'HealVnfAdditionalParams', default=[])

tacker/plugins/common/constants.py

@@ -30,6 +30,7 @@ COMMON_PREFIXES = {
 
 # Service operation status constants
 ACTIVE = "ACTIVE"
+ACK = "ACK"
 
 PENDING_CREATE = "PENDING_CREATE"
 PENDING_UPDATE = "PENDING_UPDATE"
@@ -40,6 +41,7 @@ PENDING_HEAL = "PENDING_HEAL"
 
 DEAD = "DEAD"
 ERROR = "ERROR"
+NACK = "NACK"
 
 ACTIVE_PENDING_STATUSES = (
     ACTIVE,
@@ -72,6 +74,10 @@ RES_EVT_SCALE = "SCALE"
 RES_EVT_NA_STATE = "Not Applicable"
 RES_EVT_ONBOARDED = "OnBoarded"
 RES_EVT_HEAL = "HEAL"
+RES_EVT_MAINTENANCE = [
+    "MAINTENANCE", "SCALE_IN", "MAINTENANCE_COMPLETE",
+    "PREPARE_MAINTENANCE", "PLANNED_MAINTENANCE", "INSTANCE_ACTION_DONE"
+]
 
 
 VNF_STATUS_TO_EVT_TYPES = {PENDING_CREATE: RES_EVT_CREATE,

tacker/plugins/fenix.py

@@ -0,0 +1,456 @@
+#    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 requests
+import time
+import yaml
+
+from oslo_config import cfg
+from oslo_serialization import jsonutils
+
+from tacker.common import clients
+from tacker.common import log
+from tacker.extensions import vnfm
+from tacker.plugins.common import constants
+from tacker.vnfm import vim_client
+
+
+CONF = cfg.CONF
+OPTS = [
+    cfg.IntOpt('lead_time', default=120,
+               help=_('Time for migration_type operation')),
+    cfg.IntOpt('max_interruption_time', default=120,
+               help=_('Time for how long live migration can take')),
+    cfg.IntOpt('recovery_time', default=2,
+               help=_('Time for migrated node could be fully running state')),
+    cfg.IntOpt('request_retries',
+               default=5,
+               help=_("Number of attempts to retry for request")),
+    cfg.IntOpt('request_retry_wait',
+               default=5,
+               help=_("Wait time (in seconds) between consecutive request"))
+]
+CONF.register_opts(OPTS, 'fenix')
+MAINTENANCE_KEYS = (
+    'instance_ids', 'session_id', 'state', 'reply_url'
+)
+MAINTENANCE_SUB_KEYS = {
+    'PREPARE_MAINTENANCE': [('allowed_actions', 'list'),
+                            ('instance_ids', 'list')],
+    'PLANNED_MAINTENANCE': [('allowed_actions', 'list'),
+                            ('instance_ids', 'list')]
+}
+
+
+def config_opts():
+    return [('fenix', OPTS)]
+
+
+class FenixPlugin(object):
+    def __init__(self):
+        self.REQUEST_RETRIES = cfg.CONF.fenix.request_retries
+        self.REQUEST_RETRY_WAIT = cfg.CONF.fenix.request_retry_wait
+        self.endpoint = None
+        self._instances = {}
+        self.vim_client = vim_client.VimClient()
+
+    @log.log
+    def request(self, plugin, context, vnf_dict, maintenance={},
+                data_func=None):
+        params_list = [maintenance]
+        method = 'put'
+        is_reply = True
+        if data_func:
+            action, create_func = data_func.split('_', 1)
+            create_func = '_create_%s_list' % create_func
+            if action in ['update', 'delete'] and hasattr(self, create_func):
+                params_list = getattr(self, create_func)(
+                    context, vnf_dict, action)
+                method = action if action == 'delete' else 'put'
+                is_reply = False
+        for params in params_list:
+            self._request(plugin, context, vnf_dict, params, method, is_reply)
+        return len(params_list)
+
+    @log.log
+    def create_vnf_constraints(self, plugin, context, vnf_dict):
+        self.update_vnf_constraints(plugin, context, vnf_dict,
+                                    objects=['instance_group',
+                                             'project_instance'])
+
+    @log.log
+    def delete_vnf_constraints(self, plugin, context, vnf_dict):
+        self.update_vnf_constraints(plugin, context, vnf_dict,
+                                    action='delete',
+                                    objects=['instance_group',
+                                             'project_instance'])
+
+    @log.log
+    def update_vnf_instances(self, plugin, context, vnf_dict,
+                             action='update'):
+        requests = self.update_vnf_constraints(plugin, context,
+                                               vnf_dict, action,
+                                               objects=['project_instance'])
+        if requests[0]:
+            self.post(context, vnf_dict)
+
+    @log.log
+    def update_vnf_constraints(self, plugin, context, vnf_dict,
+                               action='update', objects=[]):
+        result = []
+        for obj in objects:
+            requests = self.request(plugin, context, vnf_dict,
+                                    data_func='%s_%s' % (action, obj))
+            result.append(requests)
+        return result
+
+    @log.log
+    def post(self, context, vnf_dict, **kwargs):
+        post_function = getattr(context, 'maintenance_post_function', None)
+        if not post_function:
+            return
+        post_function(context, vnf_dict)
+        del context.maintenance_post_function
+
+    @log.log
+    def project_instance_pre(self, context, vnf_dict):
+        key = vnf_dict['id']
+        if key not in self._instances:
+            self._instances.update({
+                key: self._get_instances(context, vnf_dict)})
+
+    @log.log
+    def validate_maintenance(self, maintenance):
+        body = maintenance['maintenance']['params']['data']['body']
+        if not set(MAINTENANCE_KEYS).issubset(body) or \
+                body['state'] not in constants.RES_EVT_MAINTENANCE:
+            raise vnfm.InvalidMaintenanceParameter()
+        sub_keys = MAINTENANCE_SUB_KEYS.get(body['state'], ())
+        for key, val_type in sub_keys:
+            if key not in body or type(body[key]) is not eval(val_type):
+                raise vnfm.InvalidMaintenanceParameter()
+        return body
+
+    @log.log
+    def _request(self, plugin, context, vnf_dict, maintenance,
+                 method='put', is_reply=True):
+        client = self._get_openstack_clients(context, vnf_dict)
+        if not self.endpoint:
+            self.endpoint = client.keystone_session.get_endpoint(
+                service_type='maintenance', region_name=client.region_name)
+            if not self.endpoint:
+                raise vnfm.ServiceTypeNotFound(service_type_id='maintenance')
+
+        if 'reply_url' in maintenance:
+            url = maintenance['reply_url']
+        elif 'url' in maintenance:
+            url = "%s/%s" % (self.endpoint.rstrip('/'),
+                             maintenance['url'].strip('/'))
+        else:
+            return
+
+        def create_headers():
+            return {
+                'X-Auth-Token': client.keystone_session.get_token(),
+                'Content-Type': 'application/json',
+                'Accept': 'application/json'
+            }
+
+        request_body = {}
+        request_body['headers'] = create_headers()
+        state = constants.ACK if vnf_dict['status'] == constants.ACTIVE \
+            else constants.NACK
+        if method == 'put':
+            data = maintenance.get('data', {})
+            if is_reply:
+                data['session_id'] = maintenance.get('session_id', '')
+                data['state'] = "%s_%s" % (state, maintenance['state'])
+            request_body['data'] = jsonutils.dump_as_bytes(data)
+
+        def request_wait():
+            retries = self.REQUEST_RETRIES
+            while retries > 0:
+                response = getattr(requests, method)(url, **request_body)
+                if response.status_code == 200:
+                    break
+                else:
+                    retries -= 1
+                    time.sleep(self.REQUEST_RETRY_WAIT)
+
+        plugin.spawn_n(request_wait)
+
+    @log.log
+    def handle_maintenance(self, plugin, context, maintenance):
+        action = '_create_%s' % maintenance['state'].lower()
+        maintenance['data'] = {}
+        if hasattr(self, action):
+            getattr(self, action)(plugin, context, maintenance)
+
+    @log.log
+    def _create_maintenance(self, plugin, context, maintenance):
+        vnf_dict = maintenance.get('vnf', {})
+        vnf_dict['attributes'].update({'maintenance_scaled': 0})
+        plugin._update_vnf_post(context, vnf_dict['id'], constants.ACTIVE,
+                                vnf_dict, constants.ACTIVE,
+                                constants.RES_EVT_UPDATE)
+        instances = self._get_instances(context, vnf_dict)
+        instance_ids = [x['id'] for x in instances]
+        maintenance['data'].update({'instance_ids': instance_ids})
+
+    @log.log
+    def _create_scale_in(self, plugin, context, maintenance):
+        def post_function(context, vnf_dict):
+            scaled = int(vnf_dict['attributes'].get('maintenance_scaled', 0))
+            vnf_dict['attributes']['maintenance_scaled'] = str(scaled + 1)
+            plugin._update_vnf_post(context, vnf_dict['id'], constants.ACTIVE,
+                                    vnf_dict, constants.ACTIVE,
+                                    constants.RES_EVT_UPDATE)
+            instances = self._get_instances(context, vnf_dict)
+            instance_ids = [x['id'] for x in instances]
+            maintenance['data'].update({'instance_ids': instance_ids})
+            self.request(plugin, context, vnf_dict, maintenance)
+
+        vnf_dict = maintenance.get('vnf', {})
+        policy_action = self._create_scale_dict(plugin, context, vnf_dict)
+        if policy_action:
+            maintenance.update({'policy_action': policy_action})
+        context.maintenance_post_function = post_function
+
+    @log.log
+    def _create_prepare_maintenance(self, plugin, context, maintenance):
+        self._create_planned_maintenance(plugin, context, maintenance)
+
+    @log.log
+    def _create_planned_maintenance(self, plugin, context, maintenance):
+        def post_function(context, vnf_dict):
+            migration_type = self._get_constraints(vnf_dict,
+                                                   key='migration_type',
+                                                   default='MIGRATE')
+            maintenance['data'].update({'instance_action': migration_type})
+            self.request(plugin, context, vnf_dict, maintenance)
+
+        vnf_dict = maintenance.get('vnf', {})
+        instances = self._get_instances(context, vnf_dict)
+        request_instance_id = maintenance['instance_ids'][0]
+        selected = None
+        for instance in instances:
+            if instance['id'] == request_instance_id:
+                selected = instance
+                break
+        if not selected:
+            vnfm.InvalidMaintenanceParameter()
+
+        migration_type = self._get_constraints(vnf_dict, key='migration_type',
+                                               default='MIGRATE')
+        if migration_type == 'OWN_ACTION':
+            policy_action = self._create_migrate_dict(context, vnf_dict,
+                                                      selected)
+            maintenance.update({'policy_action': policy_action})
+            context.maintenance_post_function = post_function
+        else:
+            post_function(context, vnf_dict)
+
+    @log.log
+    def _create_maintenance_complete(self, plugin, context, maintenance):
+        def post_function(context, vnf_dict):
+            vim_res = self.vim_client.get_vim(context, vnf_dict['vim_id'])
+            scaled = int(vnf_dict['attributes'].get('maintenance_scaled', 0))
+            if vim_res['vim_type'] == 'openstack':
+                scaled -= 1
+                vnf_dict['attributes']['maintenance_scaled'] = str(scaled)
+                plugin._update_vnf_post(context, vnf_dict['id'],
+                                        constants.ACTIVE, vnf_dict,
+                                        constants.ACTIVE,
+                                        constants.RES_EVT_UPDATE)
+            if scaled > 0:
+                scale_out(plugin, context, vnf_dict)
+            else:
+                instances = self._get_instances(context, vnf_dict)
+                instance_ids = [x['id'] for x in instances]
+                maintenance['data'].update({'instance_ids': instance_ids})
+                self.request(plugin, context, vnf_dict, maintenance)
+
+        def scale_out(plugin, context, vnf_dict):
+            policy_action = self._create_scale_dict(plugin, context, vnf_dict,
+                                                    scale_type='out')
+            context.maintenance_post_function = post_function
+            plugin._vnf_action.invoke(policy_action['action'],
+                                      'execute_action', plugin=plugin,
+                                      context=context, vnf_dict=vnf_dict,
+                                      args=policy_action['args'])
+
+        vnf_dict = maintenance.get('vnf', {})
+        scaled = vnf_dict.get('attributes', {}).get('maintenance_scaled', 0)
+        if int(scaled):
+            policy_action = self._create_scale_dict(plugin, context, vnf_dict,
+                                                    scale_type='out')
+            maintenance.update({'policy_action': policy_action})
+            context.maintenance_post_function = post_function
+
+    @log.log
+    def _create_scale_dict(self, plugin, context, vnf_dict, scale_type='in'):
+        policy_action, scale_dict = {}, {}
+        policies = self._get_scaling_policies(plugin, context, vnf_dict)
+        if not policies:
+            return
+        scale_dict['type'] = scale_type
+        scale_dict['policy'] = policies[0]['name']
+        policy_action['action'] = 'autoscaling'
+        policy_action['args'] = {'scale': scale_dict}
+        return policy_action
+
+    @log.log
+    def _create_migrate_dict(self, context, vnf_dict, instance):
+        policy_action, heal_dict = {}, {}
+        heal_dict['vdu_name'] = instance['name']
+        heal_dict['cause'] = ["Migrate resource '%s' to other host."]
+        heal_dict['stack_id'] = instance['stack_name']
+        if 'scaling_group_names' in vnf_dict['attributes']:
+            sg_names = vnf_dict['attributes']['scaling_group_names']
+            sg_names = list(jsonutils.loads(sg_names).keys())
+            heal_dict['heat_tpl'] = '%s_res.yaml' % sg_names[0]
+        policy_action['action'] = 'vdu_autoheal'
+        policy_action['args'] = heal_dict
+        return policy_action
+
+    @log.log
+    def _create_instance_group_list(self, context, vnf_dict, action):
+        group_id = vnf_dict['attributes'].get('maintenance_group', '')
+        if not group_id:
+            return
+
+        def get_constraints(data):
+            maintenance_config = self._get_constraints(vnf_dict)
+            data['max_impacted_members'] = maintenance_config.get(
+                'max_impacted_members', 1)
+            data['recovery_time'] = maintenance_config.get('recovery_time', 60)
+
+        params, data = {}, {}
+        params['url'] = '/instance_group/%s' % group_id
+        if action == 'update':
+            data['group_id'] = group_id
+            data['project_id'] = vnf_dict['tenant_id']
+            data['group_name'] = 'tacker_nonha_app_group_%s' % vnf_dict['id']
+            data['anti_affinity_group'] = False
+            data['max_instances_per_host'] = 0
+            data['resource_mitigation'] = True
+            get_constraints(data)
+        params.update({'data': data})
+        return [params]
+
+    @log.log
+    def _create_project_instance_list(self, context, vnf_dict, action):
+        group_id = vnf_dict.get('attributes', {}).get('maintenance_group', '')
+        if not group_id:
+            return
+
+        params_list = []
+        url = '/instance'
+        instances = self._get_instances(context, vnf_dict)
+        _instances = self._instances.get(vnf_dict['id'], {})
+        if _instances:
+            if action == 'update':
+                instances = [v for v in instances if v not in _instances]
+                del self._instances[vnf_dict['id']]
+            else:
+                instances = [v for v in _instances if v not in instances]
+                if len(instances) != len(_instances):
+                    del self._instances[vnf_dict['id']]
+
+        if action == 'update':
+            maintenance_configs = self._get_constraints(vnf_dict)
+            for instance in instances:
+                params, data = {}, {}
+                params['url'] = '%s/%s' % (url, instance['id'])
+                data['project_id'] = instance['project_id']
+                data['instance_id'] = instance['id']
+                data['instance_name'] = instance['name']
+                data['migration_type'] = maintenance_configs.get(
+                    'migration_type', 'MIGRATE')
+                data['resource_mitigation'] = maintenance_configs.get(
+                    'mitigation_type', True)
+                data['max_interruption_time'] = maintenance_configs.get(
+                    'max_interruption_time',
+                    cfg.CONF.fenix.max_interruption_time)
+                data['lead_time'] = maintenance_configs.get(
+                    'lead_time', cfg.CONF.fenix.lead_time)
+                data['group_id'] = group_id
+                params.update({'data': data})
+                params_list.append(params)
+        elif action == 'delete':
+            for instance in instances:
+                params = {}
+                params['url'] = '%s/%s' % (url, instance['id'])
+                params_list.append(params)
+        return params_list
+
+    @log.log
+    def _get_instances(self, context, vnf_dict):
+        vim_res = self.vim_client.get_vim(context, vnf_dict['vim_id'])
+        action = '_get_instances_with_%s' % vim_res['vim_type']
+        if hasattr(self, action):
+            return getattr(self, action)(context, vnf_dict)
+        return {}
+
+    @log.log
+    def _get_instances_with_openstack(self, context, vnf_dict):
+        def get_attrs_with_link(links):
+            attrs = {}
+            for link in links:
+                href, rel = link['href'], link['rel']
+                if rel == 'self':
+                    words = href.split('/')
+                    attrs['project_id'] = words[5]
+                    attrs['stack_name'] = words[7]
+                    break
+            return attrs
+
+        instances = []
+        client = self._get_openstack_clients(context, vnf_dict)
+        resources = client.heat.resources.list(vnf_dict['instance_id'],
+                                               nested_depth=2)
+        for resource in resources:
+            if resource.resource_type == 'OS::Nova::Server' and \
+               resource.resource_status != 'DELETE_IN_PROGRESS':
+                instance = {
+                    'id': resource.physical_resource_id,
+                    'name': resource.resource_name
+                }
+                instance.update(get_attrs_with_link(resource.links))
+                instances.append(instance)
+        return instances
+
+    @log.log
+    def _get_scaling_policies(self, plugin, context, vnf_dict):
+        vnf_id = vnf_dict['id']
+        policies = []
+        if 'scaling_group_names' in vnf_dict['attributes']:
+            policies = plugin.get_vnf_policies(
+                context, vnf_id, filters={'type': constants.POLICY_SCALING})
+        return policies
+
+    @log.log
+    def _get_constraints(self, vnf, key=None, default=None):
+        config = vnf.get('attributes', {}).get('config', '{}')
+        maintenance_config = yaml.safe_load(config).get('maintenance', {})
+        if key:
+            return maintenance_config.get(key, default)
+        return maintenance_config
+
+    @log.log
+    def _get_openstack_clients(self, context, vnf_dict):
+        vim_res = self.vim_client.get_vim(context, vnf_dict['vim_id'])
+        region_name = vnf_dict.setdefault('placement_attr', {}).get(
+            'region_name', None)
+        client = clients.OpenstackClients(auth_attr=vim_res['vim_auth'],
+                                          region_name=region_name)
+        return client

tacker/tests/etc/samples/sample-tosca-vnfd-maintenance.yaml

@@ -0,0 +1,51 @@
+tosca_definitions_version: tosca_simple_profile_for_nfv_1_0_0
+
+description: Maintenance VNF with Fenix
+
+metadata:
+  template_name: tosca-vnfd-maintenance
+
+topology_template:
+  node_templates:
+    VDU1:
+      capabilities:
+        nfv_compute:
+          properties:
+            disk_size: 15 GB
+            mem_size: 2048 MB
+            num_cpus: 2
+      properties:
+        availability_zone: nova
+        image: cirros-0.4.0-x86_64-disk
+        maintenance: true
+        mgmt_driver: noop
+      type: tosca.nodes.nfv.VDU.Tacker
+
+    CP11:
+      properties:
+        anti_spoofing_protection: false
+        management: true
+        order: 0
+      requirements:
+      - virtualLink:
+          node: VL1
+      - virtualBinding:
+          node: VDU1
+      type: tosca.nodes.nfv.CP.Tacker
+
+    VL1:
+      properties:
+        network_name: net_mgmt
+        vendor: Tacker
+      type: tosca.nodes.nfv.VL
+  policies:
+  - SP1:
+      properties:
+        cooldown: 120
+        default_instances: 3
+        increment: 1
+        max_instances: 3
+        min_instances: 1
+      targets:
+      - VDU1
+      type: tosca.policies.tacker.Scaling

tacker/tests/functional/base.py

@@ -191,6 +191,13 @@ class BaseTackerTest(base.BaseTestCase):
         auth_ses = session.Session(auth=auth, verify=verify)
         return glance_client.Client(session=auth_ses)
 
+    @classmethod
+    def aodh_http_client(cls):
+        auth_session = cls.get_auth_session()
+        return SessionClient(session=auth_session,
+                             service_type='alarming',
+                             region_name='RegionOne')
+
     def get_vdu_resource(self, stack_id, res_name):
         return self.h_client.resources.get(stack_id, res_name)
 

tacker/tests/functional/vnfm/test_tosca_vnf_maintenance.py

@@ -0,0 +1,194 @@
+#    Copyright 2020 Distributed Cloud and Network (DCN)
+#
+#    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
+import time
+import yaml
+
+from oslo_serialization import jsonutils
+from oslo_utils import uuidutils
+
+from tacker.plugins.common import constants as evt_constants
+from tacker.tests import constants
+from tacker.tests.functional import base
+from tacker.tests.utils import read_file
+
+
+class VnfTestMaintenanceMonitor(base.BaseTackerTest):
+
+    def _test_vnf_tosca_maintenance(self, vnfd_file, vnf_name):
+        input_yaml = read_file(vnfd_file)
+        tosca_dict = yaml.safe_load(input_yaml)
+        tosca_arg = {'vnfd': {'name': vnf_name,
+                              'attributes': {'vnfd': tosca_dict}}}
+
+        # Create vnfd with tosca template
+        vnfd_instance = self.client.create_vnfd(body=tosca_arg)
+        self.assertIsNotNone(vnfd_instance)
+
+        # Create vnf with vnfd_id
+        vnfd_id = vnfd_instance['vnfd']['id']
+        vnf_arg = {'vnf': {'vnfd_id': vnfd_id, 'name': vnf_name}}
+        vnf_instance = self.client.create_vnf(body=vnf_arg)
+        vnf_id = vnf_instance['vnf']['id']
+
+        self.validate_vnf_instance(vnfd_instance, vnf_instance)
+
+        def _wait_vnf_active_and_assert_vdu_count(vdu_count, scale_type=None):
+            self.wait_until_vnf_active(
+                vnf_id,
+                constants.VNF_CIRROS_CREATE_TIMEOUT,
+                constants.ACTIVE_SLEEP_TIME)
+
+            vnf = self.client.show_vnf(vnf_id)['vnf']
+            self.assertEqual(vdu_count, len(jsonutils.loads(
+                vnf['mgmt_ip_address'])['VDU1']))
+
+        def _verify_maintenance_attributes(vnf_dict):
+            vnf_attrs = vnf_dict.get('attributes', {})
+            maintenance_vdus = vnf_attrs.get('maintenance', '{}')
+            maintenance_vdus = jsonutils.loads(maintenance_vdus)
+            maintenance_url = vnf_attrs.get('maintenance_url', '')
+            words = maintenance_url.split('/')
+
+            self.assertEqual(len(maintenance_vdus.keys()), 2)
+            self.assertEqual(len(words), 8)
+            self.assertEqual(words[5], vnf_dict['id'])
+            self.assertEqual(words[7], vnf_dict['tenant_id'])
+
+            maintenance_urls = {}
+            for vdu, access_key in maintenance_vdus.items():
+                maintenance_urls[vdu] = maintenance_url + '/' + access_key
+            return maintenance_urls
+
+        def _verify_maintenance_alarm(url, project_id):
+            aodh_client = self.aodh_http_client()
+            alarm_query = {
+                'and': [
+                    {'=': {'project_id': project_id}},
+                    {'=~': {'alarm_actions': url}}]}
+
+            # Check alarm instance for MAINTENANCE_ALL
+            alarm_url = 'v2/query/alarms'
+            encoded_data = jsonutils.dumps(alarm_query)
+            encoded_body = jsonutils.dumps({'filter': encoded_data})
+            resp, response_body = aodh_client.do_request(alarm_url, 'POST',
+                                                         body=encoded_body)
+            self.assertEqual(len(response_body), 1)
+            alarm_dict = response_body[0]
+            self.assertEqual(url, alarm_dict.get('alarm_actions', [])[0])
+            return response_body[0]
+
+        def _verify_maintenance_actions(vnf_dict, alarm_dict):
+            tacker_client = self.tacker_http_client()
+            alarm_url = alarm_dict.get('alarm_actions', [])[0]
+            tacker_url = '/%s' % alarm_url[alarm_url.find('v1.0'):]
+
+            def _request_maintenance_action(state):
+                alarm_body = _create_alarm_data(vnf_dict, alarm_dict, state)
+                resp, response_body = tacker_client.do_request(
+                    tacker_url, 'POST', body=alarm_body)
+
+                time.sleep(constants.SCALE_SLEEP_TIME)
+                target_scaled = -1
+                if state == 'SCALE_IN':
+                    target_scaled = 1
+                    _wait_vnf_active_and_assert_vdu_count(2, scale_type='in')
+                elif state == 'MAINTENANCE_COMPLETE':
+                    target_scaled = 0
+                    _wait_vnf_active_and_assert_vdu_count(3, scale_type='out')
+
+                updated_vnf = self.client.show_vnf(vnf_id)['vnf']
+                scaled = updated_vnf['attributes'].get('maintenance_scaled',
+                                                       '-1')
+                self.assertEqual(int(scaled), target_scaled)
+                time.sleep(constants.SCALE_WINDOW_SLEEP_TIME)
+
+            time.sleep(constants.SCALE_WINDOW_SLEEP_TIME)
+            _request_maintenance_action('SCALE_IN')
+            _request_maintenance_action('MAINTENANCE_COMPLETE')
+
+            self.verify_vnf_crud_events(
+                vnf_id, evt_constants.RES_EVT_SCALE,
+                evt_constants.ACTIVE, cnt=2)
+            self.verify_vnf_crud_events(
+                vnf_id, evt_constants.RES_EVT_SCALE,
+                evt_constants.PENDING_SCALE_OUT, cnt=1)
+            self.verify_vnf_crud_events(
+                vnf_id, evt_constants.RES_EVT_SCALE,
+                evt_constants.PENDING_SCALE_IN, cnt=1)
+
+        def _create_alarm_data(vnf_dict, alarm_dict, state):
+            '''This function creates a raw payload of alarm to trigger Tacker directly.
+
+            This function creates a raw payload which Fenix will put
+            when Fenix process maintenance procedures. Alarm_receiver and
+            specific steps of Fenix workflow will be tested by sending the raw
+            to Tacker directly.
+            '''
+            utc_time = datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%SZ')
+            fake_url = 'http://localhost/'
+            sample_data = {
+                'alarm_name': alarm_dict['name'],
+                'alarm_id': alarm_dict['alarm_id'],
+                'severity': 'low',
+                'previous': 'alarm',
+                'current': 'alarm',
+                'reason': 'Alarm test for Tacker functional test',
+                'reason_data': {
+                    'type': 'event',
+                    'event': {
+                        'message_id': uuidutils.generate_uuid(),
+                        'event_type': 'maintenance.scheduled',
+                        'generated': utc_time,
+                        'traits': [
+                            ['project_id', 1, vnf_dict['tenant_id']],
+                            ['allowed_actions', 1, '[]'],
+                            ['instance_ids', 1, fake_url],
+                            ['reply_url', 1, fake_url],
+                            ['state', 1, state],
+                            ['session_id', 1, uuidutils.generate_uuid()],
+                            ['actions_at', 4, utc_time],
+                            ['reply_at', 4, utc_time],
+                            ['metadata', 1, '{}']
+                        ],
+                        'raw': {},
+                        'message_signature': uuidutils.generate_uuid()
+                    }
+                }
+            }
+            return jsonutils.dumps(sample_data)
+
+        _wait_vnf_active_and_assert_vdu_count(3)
+        urls = _verify_maintenance_attributes(vnf_instance['vnf'])
+
+        maintenance_url = urls.get('ALL', '')
+        project_id = vnf_instance['vnf']['tenant_id']
+        alarm_dict = _verify_maintenance_alarm(maintenance_url, project_id)
+        _verify_maintenance_actions(vnf_instance['vnf'], alarm_dict)
+
+        try:
+            self.client.delete_vnf(vnf_id)
+        except Exception:
+            assert False, (
+                'Failed to delete vnf %s after the maintenance test' % vnf_id)
+        self.addCleanup(self.client.delete_vnfd, vnfd_id)
+        self.addCleanup(self.wait_until_vnf_delete, vnf_id,
+                        constants.VNF_CIRROS_DELETE_TIMEOUT)
+
+    def test_vnf_alarm_maintenance(self):
+        # instance_maintenance = self._get_instance_maintenance()
+        self._test_vnf_tosca_maintenance(
+            'sample-tosca-vnfd-maintenance.yaml',
+            'maintenance_vnf')

tacker/tests/unit/vnfm/infra_drivers/openstack/test_vdu.py

@@ -107,6 +107,7 @@ class TestVDU(base.TestCase):
             cause=["Unable to reach while monitoring resource: 'VDU1'"])
         self.heal_request_data_obj = heal_vnf_request.HealVnfRequest(
             cause='VNF monitoring fails.',
+            stack_id=vnf_dict['instance_id'],
             additional_params=[self.additional_paramas_obj])
         self.heal_vdu = vdu.Vdu(self.context, vnf_dict,
                            self.heal_request_data_obj)

tacker/tests/unit/vnfm/test_k8s_plugin.py

@@ -32,6 +32,10 @@ class FakeCVNFMonitor(mock.Mock):
     pass
 
 
+class FakePlugin(mock.Mock):
+    pass
+
+
 class FakeK8SVimClient(mock.Mock):
     pass
 
@@ -44,6 +48,8 @@ class TestCVNFMPlugin(db_base.SqlTestCase):
         self._mock_vim_client()
         self._stub_get_vim()
         self._mock_vnf_monitor()
+        self._mock_vnf_maintenance_monitor()
+        self._mock_vnf_maintenance_plugin()
         self._insert_dummy_vim()
         self.vnfm_plugin = plugin.VNFMPlugin()
         mock.patch('tacker.db.common_services.common_services_db_plugin.'
@@ -108,6 +114,22 @@ class TestCVNFMPlugin(db_base.SqlTestCase):
         self._mock(
             'tacker.vnfm.monitor.VNFMonitor', fake_vnf_monitor)
 
+    def _mock_vnf_maintenance_monitor(self):
+        self._vnf_maintenance_mon = mock.Mock(wraps=FakeCVNFMonitor())
+        fake_vnf_maintenance_monitor = mock.Mock()
+        fake_vnf_maintenance_monitor.return_value = self._vnf_maintenance_mon
+        self._mock(
+            'tacker.vnfm.monitor.VNFMaintenanceAlarmMonitor',
+            fake_vnf_maintenance_monitor)
+
+    def _mock_vnf_maintenance_plugin(self):
+        self._vnf_maintenance_plugin = mock.Mock(wraps=FakePlugin())
+        fake_vnf_maintenance_plugin = mock.Mock()
+        fake_vnf_maintenance_plugin.return_value = self._vnf_maintenance_plugin
+        self._mock(
+            'tacker.plugins.fenix.FenixPlugin',
+            fake_vnf_maintenance_plugin)
+
     def _insert_dummy_vnf_template(self):
         session = self.context.session
         vnf_template = vnfm_db.VNFD(

tacker/tests/unit/vnfm/test_monitor.py

@@ -255,3 +255,41 @@ class TestVNFReservationAlarmMonitor(testtools.TestCase):
         response = test_vnf_reservation_monitor.update_vnf_with_reservation(
             self.plugin, self.context, vnf, policy_dict)
         self.assertEqual(len(response.keys()), 3)
+
+
+class TestVNFMaintenanceAlarmMonitor(testtools.TestCase):
+
+    def setup(self):
+        super(TestVNFMaintenanceAlarmMonitor, self).setUp()
+
+    def test_process_alarm_for_vnf(self):
+        vnf = {'id': MOCK_VNF_ID}
+        trigger = {'params': {'data': {
+            'alarm_id': MOCK_VNF_ID, 'current': 'alarm'}}}
+        test_vnf_maintenance_monitor = monitor.VNFMaintenanceAlarmMonitor()
+        response = test_vnf_maintenance_monitor.process_alarm_for_vnf(
+            vnf, trigger)
+        self.assertEqual(response, True)
+
+    @mock.patch('tacker.db.common_services.common_services_db_plugin.'
+                'CommonServicesPluginDb.create_event')
+    def test_update_vnf_with_alarm(self, mock_db_service):
+        mock_db_service.return_value = {
+            'event_type': 'MONITOR',
+            'resource_id': '9770fa22-747d-426e-9819-057a95cb778c',
+            'timestamp': '2018-10-30 06:01:45.628162',
+            'event_details': {'Alarm URL set successfully': {
+                'start_actions': 'alarm'}},
+            'resource_state': 'CREATE',
+            'id': '4583',
+            'resource_type': 'vnf'}
+        vnf = {
+            'id': MOCK_VNF_ID,
+            'tenant_id': 'ad7ebc56538745a08ef7c5e97f8bd437',
+            'status': 'insufficient_data'}
+        vdu_names = ['VDU1']
+        test_vnf_maintenance_monitor = monitor.VNFMaintenanceAlarmMonitor()
+        response = test_vnf_maintenance_monitor.update_vnf_with_maintenance(
+            vnf, vdu_names)
+        result_keys = len(response) + len(response.get('vdus', {}))
+        self.assertEqual(result_keys, 4)

tacker/tests/unit/vnfm/test_plugin.py

@@ -49,7 +49,12 @@ class FakeDriverManager(mock.Mock):
 
 
 class FakeVNFMonitor(mock.Mock):
-    pass
+    def update_vnf_with_maintenance(self, vnf_dict, maintenance_vdus):
+        url = 'http://local:9890/v1.0/vnfs/%s/maintenance/%s' % (
+            vnf_dict['id'], vnf_dict['tenant_id'])
+        return {'url': url,
+                'vdus': {'ALL': 'ad7ebc56',
+                         'VDU1': '538745a0'}}
 
 
 class FakeGreenPool(mock.Mock):
@@ -60,6 +65,10 @@ class FakeVimClient(mock.Mock):
     pass
 
 
+class FakePlugin(mock.Mock):
+    pass
+
+
 class FakeException(Exception):
     pass
 
@@ -143,6 +152,8 @@ class TestVNFMPlugin(db_base.SqlTestCase):
         self._mock_vnf_monitor()
         self._mock_vnf_alarm_monitor()
         self._mock_vnf_reservation_monitor()
+        self._mock_vnf_maintenance_monitor()
+        self._mock_vnf_maintenance_plugin()
         self._insert_dummy_vim()
         self.vnfm_plugin = plugin.VNFMPlugin()
         mock.patch('tacker.db.common_services.common_services_db_plugin.'
@@ -219,6 +230,22 @@ class TestVNFMPlugin(db_base.SqlTestCase):
             'tacker.vnfm.monitor.VNFReservationAlarmMonitor',
             fake_vnf_reservation_monitor)
 
+    def _mock_vnf_maintenance_monitor(self):
+        self._vnf_maintenance_mon = mock.Mock(wraps=FakeVNFMonitor())
+        fake_vnf_maintenance_monitor = mock.Mock()
+        fake_vnf_maintenance_monitor.return_value = self._vnf_maintenance_mon
+        self._mock(
+            'tacker.vnfm.monitor.VNFMaintenanceAlarmMonitor',
+            fake_vnf_maintenance_monitor)
+
+    def _mock_vnf_maintenance_plugin(self):
+        self._vnf_maintenance_plugin = mock.Mock(wraps=FakePlugin())
+        fake_vnf_maintenance_plugin = mock.Mock()
+        fake_vnf_maintenance_plugin.return_value = self._vnf_maintenance_plugin
+        self._mock(
+            'tacker.plugins.fenix.FenixPlugin',
+            fake_vnf_maintenance_plugin)
+
     def _insert_dummy_vnf_template(self):
         session = self.context.session
         vnf_template = vnfm_db.VNFD(
@@ -1108,6 +1135,7 @@ class TestVNFMPlugin(db_base.SqlTestCase):
             parameter='VDU1',
             cause=["Unable to reach while monitoring resource: 'VDU1'"])
         heal_request_data_obj = heal_vnf_request.HealVnfRequest(
+            stack_id=dummy_device_obj['instance_id'],
             cause='VNF monitoring fails.',
             additional_params=[additional_params_obj])
         result = self.vnfm_plugin.heal_vnf(self.context,

tacker/tosca/lib/tacker_nfv_defs.yaml

@@ -278,6 +278,10 @@ node_types:
         type: tosca.datatypes.tacker.VduReservationMetadata
         required: false
 
+      maintenance:
+        type: boolean
+        required: false
+
   tosca.nodes.nfv.CP.Tacker:
     derived_from: tosca.nodes.nfv.CP
     properties:

tacker/tosca/utils.py

@@ -19,6 +19,7 @@ import yaml
 
 from collections import OrderedDict
 from oslo_log import log as logging
+from oslo_serialization import jsonutils
 from oslo_utils import uuidutils
 
 from tacker._i18n import _
@@ -93,11 +94,13 @@ deletenodes = (MONITORING, FAILURE, PLACEMENT)
 
 HEAT_RESOURCE_MAP = {
     "flavor": "OS::Nova::Flavor",
-    "image": "OS::Glance::WebImage"
+    "image": "OS::Glance::WebImage",
+    "maintenance": "OS::Aodh::EventAlarm"
 }
 
 SCALE_GROUP_RESOURCE = "OS::Heat::AutoScalingGroup"
 SCALE_POLICY_RESOURCE = "OS::Heat::ScalingPolicy"
+PLACEMENT_POLICY_RESOURCE = "OS::Nova::ServerGroup"
 
 
 @log.log
@@ -258,6 +261,12 @@ def pre_process_alarm_resources(vnf, template, vdu_metadata, unique_id=None):
                 'before_end_actions': {
                     'event_type': 'lease.event.before_end_lease'},
                 'end_actions': {'event_type': 'lease.event.end_lease'}}
+    maintenance_actions = _process_alarm_actions_for_maintenance(vnf)
+    if maintenance_actions:
+        alarm_actions.update(maintenance_actions)
+        alarm_resources['event_types'] = {}
+        alarm_resources['event_types'].update({
+            'ALL_maintenance': {'event_type': 'maintenance.scheduled'}})
     alarm_resources['query_metadata'] = query_metadata
     alarm_resources['alarm_actions'] = alarm_actions
     return alarm_resources
@@ -337,6 +346,22 @@ def _process_alarm_actions_for_reservation(vnf, policy):
     return alarm_actions
 
 
+def _process_alarm_actions_for_maintenance(vnf):
+    # process alarm url here
+    alarm_actions = dict()
+    maintenance_props = vnf['attributes'].get('maintenance', '{}')
+    maintenance_props = jsonutils.loads(maintenance_props)
+    maintenance_url = vnf['attributes'].get('maintenance_url', '')
+    for vdu, access_key in maintenance_props.items():
+        action = '%s_maintenance' % vdu
+        alarm_url = '%s/%s' % (maintenance_url.rstrip('/'), access_key)
+        if alarm_url:
+            LOG.debug('Alarm url in heat %s', alarm_url)
+            alarm_actions[action] = dict()
+            alarm_actions[action]['alarm_actions'] = [alarm_url]
+    return alarm_actions
+
+
 def get_volumes(template):
     volume_dict = dict()
     node_tpl = template['topology_template']['node_templates']
@@ -423,6 +448,8 @@ def add_resources_tpl(heat_dict, hot_res_tpl):
                 "properties": {}
             }
 
+            if res == "maintenance":
+                continue
             for prop, val in (vdu_dict).items():
                 # change from 'get_input' to 'get_param' to meet HOT template
                 if isinstance(val, dict):
@@ -517,6 +544,7 @@ def post_process_heat_template(heat_tpl, mgmt_ports, metadata,
             if heat_dict['resources'].get(vdu_name):
                 heat_dict['resources'][vdu_name]['properties']['metadata'] =\
                     metadata_dict
+    add_resources_tpl(heat_dict, res_tpl)
 
     query_metadata = alarm_resources.get('query_metadata')
     alarm_actions = alarm_resources.get('alarm_actions')
@@ -532,16 +560,14 @@ def post_process_heat_template(heat_tpl, mgmt_ports, metadata,
     if alarm_actions:
         for trigger_name, alarm_actions_dict in alarm_actions.items():
             if heat_dict['resources'].get(trigger_name):
-                heat_dict['resources'][trigger_name]['properties']. \
+                heat_dict['resources'][trigger_name]['properties'].update(
-                    update(alarm_actions_dict)
+                    alarm_actions_dict)
-
     if event_types:
         for trigger_name, event_type in event_types.items():
             if heat_dict['resources'].get(trigger_name):
                 heat_dict['resources'][trigger_name]['properties'].update(
                     event_type)
 
-    add_resources_tpl(heat_dict, res_tpl)
     for res in heat_dict["resources"].values():
         if not res['type'] == HEAT_SOFTWARE_CONFIG:
             continue
@@ -1038,6 +1064,15 @@ def findvdus(template):
     return vdus
 
 
+def find_maintenance_vdus(template):
+    maintenance_vdu_names = list()
+    vdus = findvdus(template)
+    for nt in vdus:
+        if nt.get_properties().get('maintenance'):
+            maintenance_vdu_names.append(nt.name)
+    return maintenance_vdu_names
+
+
 def get_flavor_dict(template, flavor_extra_input=None):
     flavor_dict = {}
     vdus = findvdus(template)
@@ -1152,6 +1187,27 @@ def get_resources_dict(template, flavor_extra_input=None):
     return res_dict
 
 
+def add_maintenance_resources(template, res_tpl):
+    res_dict = {}
+    maintenance_vdus = find_maintenance_vdus(template)
+    maintenance_vdus.append('ALL')
+    if maintenance_vdus:
+        for vdu_name in maintenance_vdus:
+            res_dict[vdu_name] = {}
+        res_tpl['maintenance'] = res_dict
+
+
+@log.log
+def get_policy_dict(template, policy_type):
+    policy_dict = dict()
+    for policy in template.policies:
+        if (policy.type_definition.is_derived_from(policy_type)):
+            policy_attrs = dict()
+            policy_attrs['targets'] = policy.targets
+            policy_dict[policy.name] = policy_attrs
+    return policy_dict
+
+
 @log.log
 def get_scaling_policy(template):
     scaling_policy_names = list()

tacker/vnfm/infra_drivers/openstack/openstack.py

@@ -427,11 +427,23 @@ class OpenStack(abstract_driver.VnfAbstractDriver,
     @log.log
     def heal_wait(self, plugin, context, vnf_dict, auth_attr,
                   region_name=None):
-        stack = self._wait_until_stack_ready(vnf_dict['instance_id'],
+        region_name = vnf_dict.get('placement_attr', {}).get(
+            'region_name', None)
+        heatclient = hc.HeatClient(auth_attr, region_name)
+        stack_id = vnf_dict.get('heal_stack_id', vnf_dict['instance_id'])
+
+        stack = self._wait_until_stack_ready(stack_id,
             auth_attr, infra_cnst.STACK_UPDATE_IN_PROGRESS,
             infra_cnst.STACK_UPDATE_COMPLETE,
             vnfm.VNFHealWaitFailed, region_name=region_name)
-
+        # scaling enabled
+        if vnf_dict['attributes'].get('scaling_group_names'):
+            group_names = jsonutils.loads(
+                vnf_dict['attributes'].get('scaling_group_names')).values()
+            mgmt_ips = self._find_mgmt_ips_from_groups(heatclient,
+                                                       vnf_dict['instance_id'],
+                                                       group_names)
+        else:
             mgmt_ips = self._find_mgmt_ips(stack.outputs)
 
         if mgmt_ips:
@@ -462,10 +474,13 @@ class OpenStack(abstract_driver.VnfAbstractDriver,
             return mgmt_ips
 
         mgmt_ips = {}
+        ignore_status = ['DELETE_COMPLETE', 'DELETE_IN_PROGRESS']
         for group_name in group_names:
             # Get scale group
             grp = heat_client.resource_get(instance_id, group_name)
             for rsc in heat_client.resource_get_list(grp.physical_resource_id):
+                if rsc.resource_status in ignore_status:
+                    continue
                 # Get list of resources in scale group
                 scale_rsc = heat_client.resource_get(grp.physical_resource_id,
                                                      rsc.resource_name)

tacker/vnfm/infra_drivers/openstack/translate_template.py

@@ -338,6 +338,10 @@ class TOSCAToHOT(object):
                 heat_template_yaml, scaling_policy_names)
             self.vnf['attributes']['scaling_group_names'] =\
                 jsonutils.dump_as_bytes(scaling_group_dict)
+
+        if self.vnf['attributes'].get('maintenance', None):
+            toscautils.add_maintenance_resources(tosca, res_tpl)
+
         heat_template_yaml = toscautils.post_process_heat_template(
             heat_template_yaml, mgmt_ports, metadata, alarm_resources,
             res_tpl, block_storage_details, self.unsupported_props,

tacker/vnfm/infra_drivers/openstack/vdu.py

@@ -33,6 +33,7 @@ class Vdu(object):
         self.context = context
         self.vnf_dict = vnf_dict
         self.heal_request_data_obj = heal_request_data_obj
+        self.stack_id = self.heal_request_data_obj.stack_id
         vim_id = self.vnf_dict['vim_id']
         vim_res = vim_client.VimClient().get_vim(context, vim_id)
         placement_attr = vnf_dict.get('placement_attr', {})
@@ -53,15 +54,15 @@ class Vdu(object):
         additional_params = self.heal_request_data_obj.additional_params
         for additional_param in additional_params:
             resource_name = additional_param.parameter
-            res_status = self._get_resource_status(
+            res_status = self._get_resource_status(self.stack_id,
-                self.vnf_dict['instance_id'], resource_name)
+                                                   resource_name)
             if res_status != 'CHECK_FAILED':
                 self.heat_client.resource_mark_unhealthy(
-                    stack_id=self.vnf_dict['instance_id'],
+                    stack_id=self.stack_id,
                     resource_name=resource_name, mark_unhealthy=True,
                     resource_status_reason=additional_param.cause)
                 LOG.debug("Heat stack '%s' resource '%s' marked as "
-                          "unhealthy", self.vnf_dict['instance_id'],
+                          "unhealthy", self.stack_id,
                           resource_name)
                 evt_details = (("HealVnfRequest invoked to mark resource "
                                 "'%s' to unhealthy.") % resource_name)
@@ -70,7 +71,7 @@ class Vdu(object):
                                       evt_details)
             else:
                 LOG.debug("Heat stack '%s' resource '%s' already mark "
-                          "unhealthy.", self.vnf_dict['instance_id'],
+                          "unhealthy.", self.stack_id,
                           resource_name)
 
     def heal_vdu(self):
@@ -81,11 +82,11 @@ class Vdu(object):
 
         # Mark all the resources as unhealthy
         self._resource_mark_unhealthy()
-        self.heat_client.update(stack_id=self.vnf_dict['instance_id'],
+        self.heat_client.update(stack_id=self.stack_id,
                                 existing=True)
         LOG.debug("Heat stack '%s' update initiated to revive "
-                  "unhealthy resources.", self.vnf_dict['instance_id'])
+                  "unhealthy resources.", self.stack_id)
         evt_details = (("HealVnfRequest invoked to update the stack "
-                        "'%s'") % self.vnf_dict['instance_id'])
+                        "'%s'") % self.stack_id)
         vnfm_utils.log_events(self.context, self.vnf_dict,
                               constants.RES_EVT_HEAL, evt_details)

tacker/vnfm/monitor.py

@@ -17,6 +17,8 @@
 import ast
 import copy
 import inspect
+import random
+import string
 import threading
 import time
 
@@ -427,3 +429,40 @@ class VNFReservationAlarmMonitor(VNFAlarmMonitor):
         alarm_dict['status'] = params['data'].get('current')
         driver = 'ceilometer'
         return self.process_alarm(driver, vnf, alarm_dict)
+
+
+class VNFMaintenanceAlarmMonitor(VNFAlarmMonitor):
+    """VNF Maintenance Alarm monitor"""
+
+    def update_vnf_with_maintenance(self, vnf, vdu_names):
+        maintenance = dict()
+        vdus = dict()
+        params = dict()
+        params['vnf_id'] = vnf['id']
+        params['mon_policy_name'] = 'maintenance'
+        params['mon_policy_action'] = vnf['tenant_id']
+        driver = 'ceilometer'
+
+        url = self.call_alarm_url(driver, vnf, params)
+        maintenance['url'] = url[:url.rindex('/')]
+        vdu_names.append('ALL')
+        for vdu in vdu_names:
+            access_key = ''.join(
+                random.SystemRandom().choice(
+                    string.ascii_lowercase + string.digits)
+                for _ in range(8))
+            vdus[vdu] = access_key
+        maintenance.update({'vdus': vdus})
+        details = "Alarm URL set successfully: %s" % maintenance['url']
+        vnfm_utils.log_events(t_context.get_admin_context(), vnf,
+                              constants.RES_EVT_MONITOR, details)
+        return maintenance
+
+    def process_alarm_for_vnf(self, vnf, trigger):
+        """call in plugin"""
+        params = trigger['params']
+        alarm_dict = dict()
+        alarm_dict['alarm_id'] = params['data'].get('alarm_id')
+        alarm_dict['status'] = params['data'].get('current')
+        driver = 'ceilometer'
+        return self.process_alarm(driver, vnf, alarm_dict)

tacker/vnfm/plugin.py

@@ -21,6 +21,7 @@ import yaml
 import eventlet
 from oslo_config import cfg
 from oslo_log import log as logging
+from oslo_serialization import jsonutils
 from oslo_utils import excutils
 from oslo_utils import uuidutils
 from toscaparser.tosca_template import ToscaTemplate
@@ -34,6 +35,7 @@ from tacker import context as t_context
 from tacker.db.vnfm import vnfm_db
 from tacker.extensions import vnfm
 from tacker.plugins.common import constants
+from tacker.plugins import fenix
 from tacker.tosca import utils as toscautils
 from tacker.vnfm.mgmt_drivers import constants as mgmt_constants
 from tacker.vnfm import monitor
@@ -147,7 +149,9 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
         self._vnf_monitor = monitor.VNFMonitor(self.boot_wait)
         self._vnf_alarm_monitor = monitor.VNFAlarmMonitor()
         self._vnf_reservation_monitor = monitor.VNFReservationAlarmMonitor()
+        self._vnf_maintenance_monitor = monitor.VNFMaintenanceAlarmMonitor()
         self._vnf_app_monitor = monitor.VNFAppMonitor()
+        self._vnf_maintenance_plugin = fenix.FenixPlugin()
         self._init_monitoring()
 
     def _init_monitoring(self):
@@ -258,6 +262,13 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
         vnfd_dict = yaml.safe_load(vnfd_yaml)
         if not (vnfd_dict and vnfd_dict.get('tosca_definitions_version')):
             return
+        try:
+            toscautils.updateimports(vnfd_dict)
+            tosca_vnfd = ToscaTemplate(a_file=False,
+                                  yaml_dict_tpl=vnfd_dict)
+        except Exception as e:
+            LOG.exception("tosca-parser error: %s", str(e))
+            raise vnfm.ToscaParserFailed(error_msg_details=str(e))
         polices = vnfd_dict['topology_template'].get('policies', [])
         for policy_dict in polices:
             name, policy = list(policy_dict.items())[0]
@@ -273,6 +284,13 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
                         self, context, vnf_dict, policy)
                 vnf_dict['attributes']['reservation_policy'] = vnf_dict['id']
                 vnf_dict['attributes'].update(alarm_url)
+        maintenance_vdus = toscautils.find_maintenance_vdus(tosca_vnfd)
+        maintenance = \
+            self._vnf_maintenance_monitor.update_vnf_with_maintenance(
+                vnf_dict, maintenance_vdus)
+        vnf_dict['attributes'].update({
+            'maintenance': jsonutils.dumps(maintenance['vdus'])})
+        vnf_dict['attributes']['maintenance_url'] = maintenance['url']
 
     def add_vnf_to_appmonitor(self, context, vnf_dict):
         appmonitor = self._vnf_app_monitor.create_app_dict(context, vnf_dict)
@@ -281,6 +299,8 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
     def config_vnf(self, context, vnf_dict):
         config = vnf_dict['attributes'].get('config')
         if not config:
+            self._vnf_maintenance_plugin.create_vnf_constraints(self, context,
+                                                                vnf_dict)
             return
         if isinstance(config, str):
             # TODO(dkushwaha) remove this load once db supports storing
@@ -367,6 +387,7 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
         if driver_name == 'openstack':
             self.mgmt_create_pre(context, vnf_dict)
             self.add_alarm_url_to_vnf(context, vnf_dict)
+        vnf_dict['attributes']['maintenance_group'] = uuidutils.generate_uuid()
 
         try:
             instance_id = self._vnf_manager.invoke(
@@ -431,9 +452,9 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
 
             if 'app_monitoring_policy' in vnf_dict['attributes']:
                 self.add_vnf_to_appmonitor(context, vnf_dict)
-
             if vnf_dict['status'] is not constants.ERROR:
                 self.add_vnf_to_monitor(context, vnf_dict)
+
             self.config_vnf(context, vnf_dict)
         self.spawn_n(create_vnf_wait)
         return vnf_dict
@@ -466,15 +487,18 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
             with excutils.save_and_reraise_exception():
                 new_status = constants.ERROR
                 self._vnf_monitor.delete_hosting_vnf(vnf_dict['id'])
+                self._vnf_maintenance_plugin.post(context, vnf_dict)
                 self.set_vnf_error_status_reason(context, vnf_dict['id'],
                                                  six.text_type(e))
         except exceptions.MgmtDriverException as e:
             LOG.error('VNF configuration failed')
             new_status = constants.ERROR
             self._vnf_monitor.delete_hosting_vnf(vnf_dict['id'])
+            self._vnf_maintenance_plugin.post(context, vnf_dict)
             self.set_vnf_error_status_reason(context, vnf_dict['id'],
                                              six.text_type(e))
 
+        del vnf_dict['heal_stack_id']
         vnf_dict['status'] = new_status
         self.mgmt_update_post(context, vnf_dict)
 
@@ -482,6 +506,9 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
         evt_details = ("Ends the heal vnf request for VNF '%s'" %
                        vnf_dict['id'])
         self._vnf_monitor.update_hosting_vnf(vnf_dict, evt_details)
+        self._vnf_maintenance_plugin.update_vnf_instances(self, context,
+                                                          vnf_dict)
+        self._vnf_maintenance_plugin.post(context, vnf_dict)
         # _update_vnf_post() method updates vnf_status and mgmt_ip_address
         self._update_vnf_post(context, vnf_dict['id'],
                               new_status, vnf_dict,
@@ -521,6 +548,8 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
         self._update_vnf_post(context, vnf_dict['id'], new_status,
                               vnf_dict, constants.PENDING_UPDATE,
                               constants.RES_EVT_UPDATE)
+        self._vnf_maintenance_plugin.create_vnf_constraints(self, context,
+                                                            vnf_dict)
 
     def update_vnf(self, context, vnf_id, vnf):
         vnf_attributes = vnf['vnf']['attributes']
@@ -591,6 +620,9 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
         self._vnf_monitor.update_hosting_vnf(vnf_dict, evt_details)
 
         try:
+            vnf_dict['heal_stack_id'] = heal_request_data_obj.stack_id
+            self._vnf_maintenance_plugin.project_instance_pre(context,
+                                                              vnf_dict)
             self.mgmt_update_pre(context, vnf_dict)
             self._vnf_manager.invoke(
                 driver_name, 'heal_vdu', plugin=self,
@@ -604,6 +636,7 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
                                                  vnf_dict['id'],
                                                  six.text_type(e))
                 self.mgmt_update_post(context, vnf_dict)
+                self._vnf_maintenance_plugin.post(context, vnf_dict)
                 self._update_vnf_post(context, vnf_id,
                                       constants.ERROR,
                                       vnf_dict, constants.PENDING_HEAL,
@@ -637,6 +670,8 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
                 self.set_vnf_error_status_reason(context, vnf_dict['id'],
                                                  vnf_dict['error_reason'])
 
+        self._vnf_maintenance_plugin.delete_vnf_constraints(self, context,
+                                                            vnf_dict)
         self.mgmt_delete_post(context, vnf_dict)
         self._delete_vnf_post(context, vnf_dict, e)
 
@@ -654,6 +689,8 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
             mgmt_constants.KEY_KWARGS: {'vnf': vnf_dict},
         }
         try:
+            self._vnf_maintenance_plugin.project_instance_pre(context,
+                                                              vnf_dict)
             self.mgmt_delete_pre(context, vnf_dict)
             self.mgmt_call(context, vnf_dict, kwargs)
             if instance_id:
@@ -737,6 +774,8 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
             LOG.debug("Policy %(policy)s vnf is at %(status)s",
                       {'policy': policy['name'],
                        'status': status})
+            self._vnf_maintenance_plugin.project_instance_pre(context,
+                                                              result)
             return result
 
         # post
@@ -750,6 +789,10 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
             LOG.debug("Policy %(policy)s vnf is at %(status)s",
                       {'policy': policy['name'],
                        'status': new_status})
+            action = 'delete' if policy['action'] == 'in' else 'update'
+            self._vnf_maintenance_plugin.update_vnf_instances(self, context,
+                                                              result,
+                                                              action=action)
             return result
 
         # action
@@ -1040,3 +1083,20 @@ class VNFMPlugin(vnfm_db.VNFMPluginDb, VNFMMgmtMixin):
         else:
             raise vnfm.VNFInactive(vnf_id=vnf_id,
                                    message=_(' Cannot fetch details'))
+
+    def create_vnf_maintenance(self, context, vnf_id, maintenance):
+        _maintenance = self._vnf_maintenance_plugin.validate_maintenance(
+            maintenance.copy())
+        vnf = self.get_vnf(context, vnf_id)
+        _maintenance['vnf'] = vnf
+        self._vnf_maintenance_plugin.handle_maintenance(
+            self, context, _maintenance)
+        policy_action = _maintenance.get('policy_action', '')
+        if policy_action:
+            self._vnf_action.invoke(
+                policy_action['action'], 'execute_action', plugin=self,
+                context=context, vnf_dict=vnf, args=policy_action['args'])
+        else:
+            self._vnf_maintenance_plugin.request(self, context, vnf,
+                                                 _maintenance)
+        return maintenance['maintenance']

tacker/vnfm/policy_actions/vdu_autoheal/vdu_autoheal.py

@@ -34,6 +34,9 @@ class VNFActionVduAutoheal(abstract_action.AbstractPolicyAction):
 
     def execute_action(self, plugin, context, vnf_dict, args):
         vdu_name = args.get('vdu_name')
+        stack_id = args.get('stack_id', vnf_dict['instance_id'])
+        heat_tpl = args.get('heat_tpl', 'heat_template')
+        cause = args.get('cause', [])
         if vdu_name is None:
             LOG.error("VDU resource of vnf '%s' is not present for "
                       "autoheal." % vnf_dict['id'])
@@ -46,7 +49,7 @@ class VNFActionVduAutoheal(abstract_action.AbstractPolicyAction):
             """
             resource_list = [vdu_name]
             heat_template = yaml.safe_load(vnf_dict['attributes'].get(
-                'heat_template'))
+                heat_tpl))
             vdu_resources = heat_template['resources'].get(vdu_name)
             cp_resources = vdu_resources['properties'].get('networks')
             for resource in cp_resources:
@@ -54,17 +57,18 @@ class VNFActionVduAutoheal(abstract_action.AbstractPolicyAction):
 
             return resource_list
 
+        if not cause or type(cause) is not list:
+            cause = ["Unable to reach while monitoring resource: '%s'",
+                     "Failed to monitor VDU resource '%s'"]
         resource_list = _get_vdu_resources()
         additional_params = []
         for resource in resource_list:
-            additional_paramas_obj = objects.HealVnfAdditionalParams(
+            additional_params_obj = objects.HealVnfAdditionalParams(
-                parameter=resource,
+                parameter=resource, cause=[cause[0] % resource])
-                cause=["Unable to reach while monitoring resource: '%s'" %
+            additional_params.append(additional_params_obj)
-                      resource])
-            additional_params.append(additional_paramas_obj)
 
         heal_request_data_obj = objects.HealVnfRequest(
-            cause=("Failed to monitor VDU resource '%s'" % vdu_name),
+            stack_id=stack_id,
-            additional_params=additional_params)
+            cause=(cause[-1] % vdu_name), additional_params=additional_params)
 
         plugin.heal_vnf(context, vnf_dict['id'], heal_request_data_obj)