[config] Add YANG alerting for override (#3188)

#### What I did
Add alerting for YANG validation when load_minigraph during override. This is to alert early if golden config is invalid which will breaks GCU feature. 
#### How I did it
Add alerting when `is_yang_config_validation_enabled` is not set during load_minigraph with override
#### How to verify it
Unit test

Author: wen587

config/main.py

@@ -1979,6 +1979,18 @@ def override_config_table(db, input_config_db, dry_run):
             validate_config_by_cm(cm, ns_config_input, "config_input")
             # Validate updated whole config
             validate_config_by_cm(cm, updated_config, "updated_config")
+        else:
+            cm = None
+            try:
+                # YANG validate of config minigraph generated
+                cm = ConfigMgmt(configdb=config_db)
+                cm.validateConfigData()
+            except Exception as ex:
+                log.log_warning("Failed to validate running config. Alerting: {}".format(ex))
+
+            # YANG validate config of minigraph generated overriden by golden config
+            if cm:
+                validate_config_by_cm_alerting(cm, updated_config, "updated_config")
 
         if dry_run:
             print(json.dumps(updated_config, sort_keys=True,
@@ -1997,6 +2009,15 @@ def validate_config_by_cm(cm, config_json, jname):
         sys.exit(1)
 
 
+def validate_config_by_cm_alerting(cm, config_json, jname):
+    tmp_config_json = copy.deepcopy(config_json)
+    try:
+        cm.loadData(tmp_config_json)
+        cm.validateConfigData()
+    except Exception as ex:
+        log.log_warning("Failed to validate {}. Alerting: {}".format(jname, ex))
+
+
 def override_config_db(config_db, config_input):
     # Deserialized golden config to DB recognized format
     sonic_cfggen.FormatConverter.to_deserialized(config_input)

tests/config_override_input/multi_asic_dm_rm.json

@@ -0,0 +1,11 @@
+{
+    "localhost": {
+        "FEATURE": {}
+    },
+    "asic0": {
+        "FEATURE": {}
+    },
+    "asic1": {
+        "FEATURE": {}
+    }
+}

tests/config_override_input/multi_asic_feature_rm.json

@@ -2,21 +2,30 @@
     "localhost": {
         "MACSEC_PROFILE": {
             "profile": {
-                "key": "value"
+                "primary_cak": "1159485744465e5a537272050a1011073557475152020c0e040c57223a357d7d71",
+                "primary_ckn": "6162636465666768696A6B6C6D6E6F70",
+                "fallback_cak": "000000000000000000000000000000000000000000000000000000000000000000",
+                "fallback_ckn": "11111111111111111111111111111111"
             }
         }
     },
     "asic0": {
         "MACSEC_PROFILE": {
             "profile": {
-                "key": "value"
+                "primary_cak": "1159485744465e5a537272050a1011073557475152020c0e040c57223a357d7d71",
+                "primary_ckn": "6162636465666768696A6B6C6D6E6F70",
+                "fallback_cak": "000000000000000000000000000000000000000000000000000000000000000000",
+                "fallback_ckn": "11111111111111111111111111111111"
             }
         }
     },
     "asic1": {
         "MACSEC_PROFILE": {
             "profile": {
-                "key": "value"
+                "primary_cak": "1159485744465e5a537272050a1011073557475152020c0e040c57223a357d7d71",
+                "primary_ckn": "6162636465666768696A6B6C6D6E6F70",
+                "fallback_cak": "000000000000000000000000000000000000000000000000000000000000000000",
+                "fallback_ckn": "11111111111111111111111111111111"
             }
         }
     }

tests/config_override_input/multi_asic_macsec_ov.json

@@ -1,8 +1,8 @@
 {
     "localhost": {
-        "DEVICE_METADATA": {}
+        "FEATURE": {}
     },
     "asic0": {
-        "DEVICE_METADATA": {}
+        "FEATURE": {}
     }
 }

tests/config_override_input/multi_asic_missing_asic.json

@@ -23,7 +23,7 @@
 GOLDEN_INPUT_YANG_FAILURE = os.path.join(DATA_DIR, "golden_input_yang_failure.json")
 FINAL_CONFIG_YANG_FAILURE = os.path.join(DATA_DIR, "final_config_yang_failure.json")
 MULTI_ASIC_MACSEC_OV = os.path.join(DATA_DIR, "multi_asic_macsec_ov.json")
-MULTI_ASIC_DEVICE_METADATA_RM = os.path.join(DATA_DIR, "multi_asic_dm_rm.json")
+MULTI_ASIC_FEATURE_RM = os.path.join(DATA_DIR, "multi_asic_feature_rm.json")
 MULTI_ASIC_DEVICE_METADATA_GEN_SYSINFO = os.path.join(DATA_DIR, "multi_asic_dm_gen_sysinfo.json")
 MULTI_ASIC_MISSING_LOCALHOST_OV = os.path.join(DATA_DIR, "multi_asic_missing_localhost.json")
 MULTI_ASIC_MISSING_ASIC_OV = os.path.join(DATA_DIR, "multi_asic_missing_asic.json")
@@ -105,7 +105,9 @@ def read_json_file_side_effect(filename):
                                    ['golden_config_db.json', '--dry-run'])
 
             assert result.exit_code == 0
-            assert json.loads(result.output) == current_config
+            start_pos = result.output.find('{')
+            json_text = result.output[start_pos:]
+            assert json.loads(json_text) == current_config
 
     def test_golden_config_db_empty(self):
         db = Db()
@@ -308,7 +310,15 @@ def read_json_file_side_effect(filename):
 
         # The profile_content was copied from MULTI_ASIC_MACSEC_OV, where all
         # ns sharing the same content: {"profile": {"key": "value"}}
-        profile_content = {"profile": {"key": "value"}}
+        profile_content = {
+            "profile": {
+                "primary_cak": "1159485744465e5a537272050a1011073557475152020c0e040c57223a357d7d71",
+                "primary_ckn": "6162636465666768696A6B6C6D6E6F70",
+                "fallback_cak": "000000000000000000000000000000000000000000000000000000000000000000",
+                "fallback_ckn": "11111111111111111111111111111111"
+
+            }
+        }
 
         with mock.patch('config.main.read_json_file',
                         mock.MagicMock(side_effect=read_json_file_side_effect)):
@@ -320,16 +330,16 @@ def read_json_file_side_effect(filename):
         for ns, config_db in cfgdb_clients.items():
             assert config_db.get_config()['MACSEC_PROFILE'] == profile_content
 
-    def test_device_metadata_table_rm(self):
+    def test_feature_table_rm(self):
         def read_json_file_side_effect(filename):
-            with open(MULTI_ASIC_DEVICE_METADATA_RM, "r") as f:
-                device_metadata = json.load(f)
-            return device_metadata
+            with open(MULTI_ASIC_FEATURE_RM, "r") as f:
+                feature = json.load(f)
+            return feature
         db = Db()
         cfgdb_clients = db.cfgdb_clients
 
         for ns, config_db in cfgdb_clients.items():
-            assert 'DEVICE_METADATA' in config_db.get_config()
+            assert 'FEATURE' in config_db.get_config()
 
         with mock.patch('config.main.read_json_file',
                         mock.MagicMock(side_effect=read_json_file_side_effect)):
@@ -339,7 +349,7 @@ def read_json_file_side_effect(filename):
             assert result.exit_code == 0
 
         for ns, config_db in cfgdb_clients.items():
-            assert 'DEVICE_METADATA' not in config_db.get_config()
+            assert 'FEATURE' not in config_db.get_config()
 
     def test_device_metadata_keep_sysinfo(self):
         def read_json_file_side_effect(filename):