[multi-asic]: Add function to load database config

ansible/library/lag_facts.py

@@ -3,6 +3,7 @@
 import json
 import sys
 from ansible.module_utils.basic import *
+from ansible.module_utils.multi_asic_utils import load_db_config
 try:
     from sonic_py_common import multi_asic
     NAMESPACE_LIST = multi_asic.get_namespace_list()
@@ -70,6 +71,8 @@ def get_po_names(self):
                 self.module.fail_json(msg=fail_msg)
             else:
                 for po in out.split():
+                    # load db config
+                    load_db_config()
                     if 'sonic_py_common' in sys.modules and multi_asic.is_port_channel_internal(po):
                         continue
                     self.lag_names[po] = ns

ansible/module_utils/multi_asic_utils.py

@@ -0,0 +1,22 @@
+def load_db_config():
+    '''
+    Load the correct database config file:
+     - database_global.json for multi asic
+     - database_config.json for single asic
+    Loading database config file is not required for
+    201911 images so ignore import error or function
+    name error.
+    '''
+    try:
+        from sonic_py_common import multi_asic
+        from swsscommon import swsscommon
+        if multi_asic.is_multi_asic():
+            if not swsscommon.SonicDBConfig.isGlobalInit():
+                swsscommon.SonicDBConfig.load_sonic_global_db_config()
+        else:
+            if not swsscommon.SonicDBConfig.isInit():
+                swsscommon.SonicDBConfig.load_sonic_db_config()
+    except ImportError:
+        pass
+    except NameError:
+        pass

ansible/module_utils/port_utils.py

@@ -15,6 +15,8 @@ def _port_alias_to_name_map_50G(all_ports, s100G_ports,):
 def get_port_alias_to_name_map(hwsku, asic_id=None):
     try:
         from sonic_py_common import multi_asic
+        from ansible.module_utils.multi_asic_utils  import load_db_config
+        load_db_config()
         namespace_list = multi_asic.get_all_namespaces()
         for key, list in namespace_list.items():
             asic_ids = []