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Code Editor : cleaners.py
# 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 from __future__ import absolute_import from __future__ import division from builtins import range import os import logging import timeit from sqlalchemy.orm import sessionmaker from sqlalchemy.exc import OperationalError from sqlalchemy import func from lvestats.lib.commons.func import reboot_lock from lvestats.core.plugin import LveStatsPlugin, LveStatsPluginTerminated from lvestats.orm import history, history_x60, history_gov, incident import lvestats.lib.snapshot __author__ = 'shaman' class HistoryCleaner(LveStatsPlugin): def __init__(self): self.period = 60 * 60 # 1 hour self.batch = 6 * 60 * 60 # 6 hours self.execute_timeout = 20 self.keep_history_days = 30 # 1 months to keep history, by default self.db_engine = None self.log = logging.getLogger('HistoryCleaner') self.db_type = 'sqlite' self.server_id = None # db_type = mysql # db_type = postgresql def set_db_engine(self, engine): self.db_engine = engine def set_config(self, config): self.keep_history_days = int(config.get('keep_history_days', self.keep_history_days)) self.period = int(config.get('period', 60)) * 60 self.db_type = config.get('db_type', self.db_type) self.server_id = config.get('server_id', 'localhost') def time_threshold(self): return int(self.now - self.keep_history_days*24*60*60) @staticmethod def clean_old_snapshots(ts_to): for uid in os.listdir(lvestats.lib.snapshot.SNAPSHOT_PATH): snap = lvestats.lib.snapshot.Snapshot({'uid': uid}) snap.delete_old(ts_to) def execute(self, lve_data): t_min = self.time_threshold() # tables to clean: history, history_gov, incident, snapshot self.log.debug('Records with timestamp less then %d will be erased' % t_min) if os.path.exists(lvestats.lib.snapshot.SNAPSHOT_PATH): self.clean_old_snapshots(t_min) self.log.debug('Deleting old records from database') with reboot_lock(): session = sessionmaker(bind=self.db_engine)() start_time = timeit.default_timer() try: self.delete(session, history_x60, history_x60.created, t_min) self.delete(session, history_gov, history_gov.ts, t_min) self.delete(session, incident, incident.incident_end_time, t_min) session.commit() first_created = session.query(func.min(history.created)).filter(history.server_id == self.server_id).one()[0] or t_min for iteration, timestamp in enumerate(range(int(first_created) + self.batch, int(t_min), self.batch)): self.delete(session, history, history.created, timestamp) session.commit() if timeit.default_timer() - start_time > self.execute_timeout: self.log.debug( "Iterations: %s. Deleted: %sh", iteration, (timestamp - first_created) / (60 * 60)) break else: self.delete(session, history, history.created, t_min) session.commit() except OperationalError as e: session.rollback() self.log.warning(str(e)) except LveStatsPluginTerminated: self.log.debug('Cleaner terminated. Trying to rollback') session.rollback() session.close() raise LveStatsPluginTerminated() finally: elapsed = (timeit.default_timer() - start_time) * 1000 # Milliseconds self.log.debug('Execution time: %d' % elapsed) session.close() def delete(self, session, table, ts_column, limit): session.query(table) \ .filter(ts_column < limit, table.server_id == self.server_id) \ .delete(synchronize_session=False)
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