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# coding=utf-8 # # Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2019 All Rights Reserved # # Licensed under CLOUD LINUX LICENSE AGREEMENT # http://cloudlinux.com/docs/LICENSE.TXT """Replace columns username to uid Revision ID: 15fed017ca0b Revises: 48efb1674139 Create Date: 2016-07-22 17:19:55.478609 """ import logging import os import collections from alembic import op from alembic import context from sqlalchemy import Column, Integer, String, Float, Index, MetaData, Table from lvestats.lib import uidconverter # revision identifiers, used by Alembic. revision = '15fed017ca0b' down_revision = '48efb1674139' branch_labels = None depends_on = None HISTORY_GOV_TABLE_NAME = 'lve_stats2_history_gov' metadata = MetaData() logger = logging.getLogger(f'alembic.script.{os.path.basename(__name__)}') history_gov_old_items = ( Column('ts', Integer, index=True, primary_key=True, autoincrement=False), Column('username', String(64), primary_key=True, autoincrement=False), Column('sum_cpu', Float), Column('sum_write', Float), Column('sum_read', Float), Column('limit_cpu_on_period_end', Integer), Column('limit_read_on_period_end', Integer), Column('limit_write_on_period_end', Integer), Column('cause_of_restrict', Integer), Column('server_id', String(255), primary_key=True, autoincrement=False) ) history_gov_new_items = ( Column('ts', Integer, primary_key=True, autoincrement=False), Index(f'ix_{HISTORY_GOV_TABLE_NAME}_ts_2', 'ts'), Column('uid', Integer, primary_key=True, autoincrement=False), Column('sum_cpu', Float), Column('sum_write', Float), Column('sum_read', Float), Column('limit_cpu_on_period_end', Integer), Column('limit_read_on_period_end', Integer), Column('limit_write_on_period_end', Integer), Column('cause_of_restrict', Integer), Column('server_id', String(255), primary_key=True, autoincrement=False) ) def upgrade(): connection = op.get_bind() local_server_id = context.config.attributes.get('lve-stats')['server_id'] username_to_uid_cache = collections.defaultdict(dict) tablename_renamed = HISTORY_GOV_TABLE_NAME + '_' + down_revision # upgrade table structure op.rename_table(HISTORY_GOV_TABLE_NAME, tablename_renamed) history_gov = op.create_table( HISTORY_GOV_TABLE_NAME, history_gov_new_items) # upgrade data history_gov_old = Table(tablename_renamed, metadata, history_gov_old_items) trans = connection.begin() data_history_gov_old = connection.execute(history_gov_old.select()) for history_gov_old_row in data_history_gov_old.fetchall(): history_gov_new_row = dict(history_gov_old_row) server_id = history_gov_new_row['server_id'] username = history_gov_new_row.pop('username') if username in username_to_uid_cache[server_id]: uid = username_to_uid_cache[server_id][username] else: uid = uidconverter.username_to_uid( username, local_server_id, server_id, connection) or -1 if uid < 0: logger.warning( 'Can\'t obtain uid for user "%s"; server_id "%s"', username, server_id, ) username_to_uid_cache[server_id][username] = uid if uid > 0: history_gov_new_row['uid'] = uid connection.execute(history_gov.insert(history_gov_new_row)) trans.commit() # delete old table op.drop_table(tablename_renamed) def downgrade(): connection = op.get_bind() local_server_id = context.config.attributes.get('lve-stats')['server_id'] uid_to_username_cache = collections.defaultdict(dict) tablename_renamed = HISTORY_GOV_TABLE_NAME + '_' + revision # downgrade table structure history_gov_new=>history_gov_old op.rename_table(HISTORY_GOV_TABLE_NAME, tablename_renamed) history_gov_old = op.create_table( HISTORY_GOV_TABLE_NAME, history_gov_old_items) # downgrade data history_gov = Table(tablename_renamed, metadata, history_gov_new_items) trans = connection.begin() data_history_gov_new = connection.execute(history_gov.select()) for history_gov_new_row in data_history_gov_new.fetchall(): history_gov_old_dict = dict(history_gov_new_row) server_id = history_gov_old_dict['server_id'] uid = history_gov_old_dict.pop('uid') if uid in uid_to_username_cache[server_id]: username = uid_to_username_cache[server_id][uid] else: username = uidconverter.uid_to_username( uid, local_server_id, server_id, connection) if username is None: logger.warning( 'Can\'t obtain user name for uid "%s"; server_id "%s"', uid, server_id, ) uid_to_username_cache[server_id][uid] = username if username: history_gov_old_dict['username'] = username connection.execute(history_gov_old.insert(history_gov_old_dict)) trans.commit() # delete old table op.drop_table(tablename_renamed)