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Mini Shell
# 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
import logging
from sqlalchemy import insert, select
from sqlalchemy.orm import sessionmaker
from lvestats.core.plugin import LveStatsPlugin
from lvestats.lib.commons.func import get_chunks, reboot_lock
from lvestats.orm import user as user_class
from lvestats.orm.history import history
from lvestats.orm.servers import servers
class DBSaver(LveStatsPlugin):
def __init__(self):
self.log = logging.getLogger('plugin.DBSaver')
self.now = 0 # This changes in MainLoop
self.config = None
self.period = 60
self.server_id = 'localhost'
def set_config(self, config):
self.period = int(config.get('db_timeout', self.period))
self.server_id = config.get('server_id', self.server_id)
def execute(self, lve_data):
sql_insert_query = insert(history)
sql_select_servers = select([servers]).where(servers.server_id == self.server_id)
sql_insert_servers = insert(servers)
sql_update_servers = servers.__table__.update().where(servers.server_id == self.server_id)
with reboot_lock():
conn = self.engine.connect()
tx = conn.begin()
try:
row = conn.execute(sql_select_servers)
if row.returns_rows:
res = row.fetchone()
if res is not None:
if res['lve_version'] != lve_data['LVE_VERSION']:
conn.execute(sql_update_servers.values({'lve_version': lve_data['LVE_VERSION']}))
else:
conn.execute(
sql_insert_servers,
server_id=self.server_id,
lve_version=lve_data['LVE_VERSION'])
else:
conn.execute(
sql_insert_servers,
server_id=self.server_id,
lve_version=lve_data['LVE_VERSION'])
sql_insert_list = []
for lve_id, v in lve_data.get('lve_usage', {}).items():
sql_insert_list.append(dict(
id=lve_id,
cpu=int(round(v.cpu_usage)), # pylint: disable=round-builtin
cpu_limit=v.lcpu,
cpu_fault=v.cpu_fault,
mep=v.mep,
mep_limit=v.lep,
io=int(round(v.io_usage)), # pylint: disable=round-builtin
io_limit=v.io,
mem=int(round(v.mem_usage)), # pylint: disable=round-builtin
mem_limit=v.lmem,
mem_fault=v.mem_fault,
mep_fault=v.mep_fault,
created=int(round(self.now)), # pylint: disable=round-builtin
server_id=self.server_id,
lmemphy=v.lmemphy,
memphy=int(round(v.memphy)), # pylint: disable=round-builtin
memphy_fault=v.memphy_fault,
lnproc=v.lnproc,
nproc=int(round(v.nproc)), # pylint: disable=round-builtin
nproc_fault=v.nproc_fault,
io_fault=v.io_fault,
iops_fault=v.iops_fault,
liops=v.liops,
iops=int(round(v.iops)))) # pylint: disable=round-builtin
for chunk in get_chunks(sql_insert_list):
try:
conn.execute(sql_insert_query, chunk)
except OverflowError:
self._try_executing_small_chunks(conn, sql_insert_query, chunk)
raise
tx.commit()
except:
tx.rollback()
raise
finally:
conn.close()
def _try_executing_small_chunks(self, conn, query, insert_params, small_chunk_size=10):
"""Try executing smaller chunks so that it will be feasible to log the one causing error.
In case when data contains value which is bigger than column type can handle, OveflowError is raised.
:param sqlalchemy.engine.Connection conn: db engine
:param sqlalchemy.sql.expression.Insert query: query to execute
:param typing.List[typing.Dict] insert_params: list of params to insert
:param int chunk_length: length of small chunks
"""
for small_chunk in get_chunks(insert_params, small_chunk_size):
try:
conn.execute(query, small_chunk)
except OverflowError:
self.log.error('Overflow detected in %s', small_chunk)
break
class DbUsernamesSaver(LveStatsPlugin):
def __init__(self):
self.period = 60*60 # once an hour
self.engine = None
self.enabled = True
def set_config(self, config):
self.enabled = config.get('collect_usernames', 'false').lower() == 'true'
def set_db_engine(self, engine):
self.engine = engine
def execute(self, lve_data):
if self.enabled:
session = sessionmaker(bind=self.engine)()
for user_info in lve_data['users']:
user = user_class()
user.uid, user.user_name, user.server_id = user_info
try:
session.merge(user)
session.flush()
except: # workaround for sqlalchemy could not deal with complex key on detecting duplicates when merge
session.rollback()
session.commit()
session.close()
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