[db_migrator] fix old 1911 feature config migration to a new one. (#1…

…635)

* [db_migrator] fix old 1911 feature config migration to a new one.

This change is in addition to sonic-net/sonic-utilities#1522.
The init_cfg.json may have important fields added to configuration, while in
previous fix these entries will not be added when table already exists.
This change fixes this behaviour. Also, in order to preserve users auto_restart
configuration a special logic for migrating CONTAINER_FEATURE table has been implemented.
A test to cover this scenario is added.

Signed-off-by: Stepan Blyschak <stepanb@nvidia.com>

scripts/db_migrator.py

@@ -174,6 +174,21 @@ def migrate_copp_table(self):
         for copp_key in keys:
             self.appDB.delete(self.appDB.APPL_DB, copp_key)
 
+    def migrate_feature_table(self):
+        '''
+        Combine CONTAINER_FEATURE and FEATURE tables into FEATURE table.
+        '''
+        feature_table = self.configDB.get_table('FEATURE')
+        for feature, config in feature_table.items():
+            state = config.pop('status', 'disabled')
+            config['state'] = state
+            self.configDB.set_entry('FEATURE', feature, config)
+
+        container_feature_table = self.configDB.get_table('CONTAINER_FEATURE')
+        for feature, config in container_feature_table.items():
+            self.configDB.mod_entry('FEATURE', feature, config)
+            self.configDB.set_entry('CONTAINER_FEATURE', feature, None)
+
     def migrate_config_db_buffer_tables_for_dynamic_calculation(self, speed_list, cable_len_list, default_dynamic_th, abandon_method, append_item_method):
         '''
         Migrate buffer tables to dynamic calculation mode
@@ -419,6 +434,8 @@ def version_1_0_3(self):
         """
         log.log_info('Handling version_1_0_3')
 
+        self.migrate_feature_table()
+
         # Check ASIC type, if Mellanox platform then need DB migration
         if self.asic_type == "mellanox":
             if self.mellanox_buffer_migrator.mlnx_migrate_buffer_pool_size('version_1_0_3', 'version_1_0_4') \
@@ -520,15 +537,13 @@ def get_version(self):
 
         return 'version_unknown'
 
-
     def set_version(self, version=None):
         if not version:
             version = self.CURRENT_VERSION
         log.log_info('Setting version to ' + version)
         entry = { self.TABLE_FIELD : version }
         self.configDB.set_entry(self.TABLE_NAME, self.TABLE_KEY, entry)
 
-
     def common_migration_ops(self):
         try:
             with open(INIT_CFG_FILE) as f:
@@ -537,14 +552,16 @@ def common_migration_ops(self):
             raise Exception(str(e))
 
         for init_cfg_table, table_val in init_db.items():
-            data = self.configDB.get_table(init_cfg_table)
-            if data:
-                # Ignore overriding the values that pre-exist in configDB
-                continue
             log.log_info("Migrating table {} from INIT_CFG to config_db".format(init_cfg_table))
-            # Update all tables that do not exist in configDB but are present in INIT_CFG
-            for init_table_key, init_table_val in table_val.items():
-                self.configDB.set_entry(init_cfg_table, init_table_key, init_table_val)
+            for key in table_val:
+                curr_cfg = self.configDB.get_entry(init_cfg_table, key)
+                init_cfg = table_val[key]
+
+                # Override init config with current config.
+                # This will leave new fields from init_config
+                # in new_config, but not override existing configuration.
+                new_cfg = {**init_cfg, **curr_cfg}
+                self.configDB.set_entry(init_cfg_table, key, new_cfg)
 
         self.migrate_copp_table()
 

tests/db_migrator_input/config_db/feature-expected.json

@@ -0,0 +1,18 @@
+{
+	"FEATURE|swss": {
+		"auto_restart": "disabled",
+		"has_global_scope": "False",
+		"has_per_asic_scope": "True",
+		"has_timer": "False",
+		"high_mem_alert": "disabled",
+		"state": "enabled"
+	},
+	"FEATURE|telemetry": {
+		"auto_restart": "enabled",
+		"has_global_scope": "False",
+		"has_per_asic_scope": "True",
+		"has_timer": "False",
+		"high_mem_alert": "disabled",
+		"state": "enabled"
+	}
+}

tests/db_migrator_input/config_db/feature-input.json

@@ -0,0 +1,13 @@
+{
+	"CONTAINER_FEATURE|swss": {
+		"auto_restart": "disabled",
+		"high_mem_alert": "disabled"
+	},
+	"CONTAINER_FEATURE|telemetry": {
+		"auto_restart": "enabled",
+		"high_mem_alert": "disabled"
+	},
+	"FEATURE|telemetry": {
+		"status": "enabled"
+	}
+}

tests/db_migrator_input/init_cfg.json

@@ -1,2 +1,20 @@
 {
+	"FEATURE": {
+		"swss": {
+			"auto_restart": "enabled",
+			"has_global_scope": "False",
+			"has_per_asic_scope": "True",
+			"has_timer": "False",
+			"high_mem_alert": "disabled",
+			"state": "enabled"
+		},
+		"telemetry": {
+			"auto_restart": "disabled",
+			"has_global_scope": "False",
+			"has_per_asic_scope": "True",
+			"has_timer": "False",
+			"high_mem_alert": "disabled",
+			"state": "disabled"
+		}
+	}
 }

tests/db_migrator_test.py

@@ -2,6 +2,8 @@
 import pytest
 import sys
 
+from deepdiff import DeepDiff
+
 from swsssdk import SonicV2Connector
 from sonic_py_common import device_info
 
@@ -218,3 +220,30 @@ def test_port_autoneg_migrator(self):
 
         assert dbmgtr.configDB.get_table('PORT') == expected_db.cfgdb.get_table('PORT')
         assert dbmgtr.configDB.get_table('VERSIONS') == expected_db.cfgdb.get_table('VERSIONS')
+
+
+class TestInitConfigMigrator(object):
+    @classmethod
+    def setup_class(cls):
+        os.environ['UTILITIES_UNIT_TESTING'] = "2"
+
+    @classmethod
+    def teardown_class(cls):
+        os.environ['UTILITIES_UNIT_TESTING'] = "0"
+        dbconnector.dedicated_dbs['CONFIG_DB'] = None
+
+    def test_init_config_feature_migration(self):
+        dbconnector.dedicated_dbs['CONFIG_DB'] = os.path.join(mock_db_path, 'config_db', 'feature-input')
+        import db_migrator
+        dbmgtr = db_migrator.DBMigrator(None)
+        dbmgtr.migrate()
+        dbconnector.dedicated_dbs['CONFIG_DB'] = os.path.join(mock_db_path, 'config_db', 'feature-expected')
+        expected_db = Db()
+
+        resulting_table = dbmgtr.configDB.get_table('FEATURE')
+        expected_table = expected_db.cfgdb.get_table('FEATURE')
+
+        diff = DeepDiff(resulting_table, expected_table, ignore_order=True)
+        assert not diff
+
+        assert not expected_db.cfgdb.get_table('CONTAINER_FEATURE')