Support multi artifact of ansible driver

The Ansible driver can only run specific script files.
Due to multi artifact support of mgmt driver, it will be extended to
specify script files to be executed in each life cycle.

Implements: blueprint add-ansible-mgmt-driver-sample
Change-Id: Id584a41fc7ae64a682d6dd390a38913e2c7e655b

releasenotes/notes/support-multi-artifact-of-ansible-driver-cdb731436b5bc573.yaml

@@ -0,0 +1,10 @@
+---
+features:
+  - |
+    The Ansible driver can only run specific script files.
+    Due to multi artifact support of mgmt driver, it will be
+    extended to specify script files to be executed in each life cycle.
+    This will be achieved by implementing primary and dependencies
+    keys defined by TOSCA, primary can define the primary script,
+    dependencies can define a secondary script that will be referenced
+    by the primary script.

samples/mgmt_driver/ansible/ansible_driver.py

@@ -79,6 +79,14 @@ class AnsibleDriver(object):
         self._vnf_instance = vnf_instance
         self._context = context
 
+        vnfd_dict = vnflcm_utils.get_vnfd_dict(context,
+                vnf_instance.vnfd_id,
+                vnf_instance.instantiated_vnf_info.flavour_id)
+        vnf_value = vnfd_dict['topology_template']['node_templates']['VNF']
+        interfaces_vnflcm_value = (vnf_value.get('interfaces', {})
+                .get('Vnflcm', {}))
+        artifacts_vnflcm_value = vnf_value.get('artifacts', {})
+
         start_msg = ("Ansible Management Driver invoked for configuration of"
                      "VNF: {}".format(self._vnf.get("name")))
 
@@ -109,8 +117,34 @@ class AnsibleDriver(object):
             LOG.info("Unable to retrieve mgmt_ip_address of VNF")
             return
 
+        action_interface = None
+        if action == mgmt_constants.ACTION_TERMINATE_VNF:
+            action_interface = 'terminate_start'
+        elif action == mgmt_constants.ACTION_SCALE_IN_VNF:
+            action_interface = 'scale_start'
+        elif action == mgmt_constants.ACTION_SCALE_OUT_VNF:
+            action_interface = 'scale_end'
+        elif action == mgmt_constants.ACTION_INSTANTIATE_VNF:
+            action_interface = 'instantiate_end'
+        elif action == mgmt_constants.ACTION_HEAL_VNF:
+            action_interface = 'heal_end'
+
+        action_value = interfaces_vnflcm_value.get(action_interface, {})
+        action_dependencies = (action_value.get('implementation', {})
+                .get('dependencies', []))
+
+        # NOTE: Currently action_dependencies is having the value of
+        # last element in the list because in the current specification
+        # only a single value is available for dependencies.
+        if isinstance(action_dependencies, list):
+            for arti in action_dependencies:
+                action_dependencies = arti
+
+        filename = artifacts_vnflcm_value.get(action_dependencies,
+                {}).get('file', {})
+
         # load the configuration file
-        config_yaml = self._load_ansible_config(request_obj)
+        config_yaml = self._load_ansible_config(request_obj, filename)
         if not config_yaml:
             return
 
@@ -254,23 +288,17 @@ class AnsibleDriver(object):
 
         return yaml.dump(config_data)
 
-    def _load_ansible_config(self, request_obj):
+    def _load_ansible_config(self, request_obj, filename):
         # load vnf package path
         vnf_package_path = vnflcm_utils._get_vnf_package_path(self._context,
             self._vnf_instance.vnfd_id)
-        script_ansible_path = os.path.join(vnf_package_path,
+        script_ansible_path = os.path.join(vnf_package_path, filename)
-            utils.CONFIG_FOLDER)
 
         script_ansible_config = None
-
         # load ScriptANSIBLE/config.yaml
         if os.path.exists(script_ansible_path):
-            for file in os.listdir(script_ansible_path):
+            with open(script_ansible_path) as file_obj:
-                if file.endswith('yaml') and file.startswith('config'):
+                script_ansible_config = yaml.safe_load(file_obj)
-                    with open(
-                            os.path.join(
-                                script_ansible_path, file)) as file_obj:
-                        script_ansible_config = yaml.safe_load(file_obj)
 
         if script_ansible_config is None:
             LOG.error("not defined ansible script config")