Copp Changes (sonic-net#1004)

Added DB migrator script for removing old copp APP DB entries.

Co-authored-by: dgsudharsan <[email protected]>

scripts/db_migrator.py

@@ -145,6 +145,19 @@ def migrate_intf_table(self):
  self.appDB.set(self.appDB.APPL_DB, table, 'NULL', 'NULL')
  if_db.append(if_name)
 
+ def migrate_copp_table(self):
+ '''
+ Delete the existing COPP table
+ '''
+ if self.appDB is None:
+ return
+
+ keys = self.appDB.keys(self.appDB.APPL_DB, "COPP_TABLE:*")
+ if keys is None:
+ return
+ for copp_key in keys:
+ self.appDB.delete(self.appDB.APPL_DB, copp_key)
+
  def version_unknown(self):
  """
  version_unknown tracks all SONiC versions that doesn't have a version
@@ -248,6 +261,8 @@ def common_migration_ops(self):
  for init_table_key, init_table_val in table_val.items():
  self.configDB.set_entry(init_cfg_table, init_table_key, init_table_val)
 
+ self.migrate_copp_table()
+
  def migrate(self):
  version = self.get_version()
  log.log_info('Upgrading from version ' + version)