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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
from __future__ import absolute_import
from builtins import range
import logging
import time
import os
import sqlalchemy
from sqlalchemy import insert, func
from sqlalchemy import Column, Integer, String, Float
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy.exc import SQLAlchemyError, DatabaseError
from datetime import datetime, timedelta
from lvestats.lib.commons.func import get_chunks
from lvestats.core.plugin import LveStatsPlugin, LveStatsPluginTerminated
from lvestats.orm.history_gov import history_gov
from lvestats.orm.history import history, history_x60
from lvestats.lib.commons.dateutil import gm_datetime_to_unixtimestamp
from lvestats.lib import uidconverter
from lvestats.lib.dbengine import fix_lost_keep_alive, validate_database
STATE_FILE = '/var/lve/v1_migration_last.ts'
V2_KEYS = ['id',
'mem', 'mem_limit', 'mem_fault',
'memphy', 'lmemphy', 'memphy_fault',
'mep', 'mep_limit', 'mep_fault',
'nproc', 'lnproc', 'nproc_fault', 'iops', 'liops']
V2_GOV_KEYS = ['username', 'sum_cpu', 'sum_write', 'sum_read',
'limit_cpu_on_period_end', 'limit_read_on_period_end', 'limit_write_on_period_end',
'cause_of_restrict']
V1Base = declarative_base()
class V1HistoryGov(V1Base):
"""
Mapping out v1 gov history table
"""
__tablename__ = 'history_gov'
ts = Column('ts', Integer, primary_key=True)
username = Column('username', String(64), primary_key=True)
sum_cpu = Column('sum_cpu', Float)
sum_write = Column('sum_write', Float)
sum_read = Column('sum_read', Float)
limit_cpu_on_period_end = Column('limit_cpu_on_period_end', Integer)
limit_read_on_period_end = Column('limit_read_on_period_end', Integer)
limit_write_on_period_end = Column('limit_write_on_period_end', Integer)
cause_of_restrict = Column('cause_of_restrict', Integer)
server_id = Column('server_id', String(10), primary_key=True)
weight = Column('weight', Integer)
class V1History(V1Base):
"""
Mapping out v1 history table
"""
__tablename__ = 'history'
id = Column('id', Integer, primary_key=True)
cpu = Column('cpu', Integer)
cpu_limit = Column('cpu_limit', Integer)
cpu_max = Column('cpu_max', Integer)
ncpu = Column('ncpu', Integer)
mep = Column('mep', Integer)
mep_limit = Column('mep_limit', Integer)
mep_max = Column('mep_max', Integer)
io = Column('io', Integer)
io_max = Column('io_max', Integer)
io_limit = Column('io_limit', Integer)
mem = Column('mem', Integer)
mem_limit = Column('mem_limit', Integer)
mem_max = Column('mem_max', Integer)
mem_fault = Column('mem_fault', Integer)
mep_fault = Column('mep_fault', Integer)
created = Column('created', sqlalchemy.types.DateTime, primary_key=True)
weight = Column('weight', Integer)
server_id = Column('server_id', String(10))
lmemphy = Column('lmemphy', Integer)
memphy = Column('memphy', Integer)
memphy_max = Column('memphy_max', Integer)
memphy_fault = Column('memphy_fault', Integer)
lnproc = Column('lnproc', Integer)
nproc = Column('nproc', Integer)
nproc_max = Column('nproc_max', Integer)
nproc_fault = Column('nproc_fault', Integer)
iops = Column('iops', Integer)
iops_max = Column('iops_max', Integer)
liops = Column('liops', Integer)
class V1TimeInterval(object):
"""
The way it would work - on first run, the /var/lve/v1_migration_last.ts will be non-existant, and we will
use latest timestamp from V1 db as the 'starting point'
After that on each call of get_data we will use that 'starting point' to get_period from start point to 1 hour
before. As soon as our start point is > 30 days old -- we will return as part of get_period third parameter true
which means that ok, the rest of data is too old, lets move on.
V1DBMigrator will convert data for that period, and then will call save_state(from) -- this will be new starting
point for the next plugin run. We will store it in a property (last_ts), and save it to the file.
So, that even if software restarted, we don't just ignore it.
"""
def __init__(self, v1session, ts_file=STATE_FILE, server_id='localhost'):
self.ts_file = ts_file
self.server_id = server_id
self.last_ts = None
self.last_uid = -1
self.v1session = v1session
self.read_state()
def save_ts_to_file(self, ts, uid=None):
with open(self.ts_file, 'w') as f:
f.write(ts.strftime(self.get_ts_format()))
self.last_ts = ts
if uid is not None:
f.write('\n' + str(uid))
self.last_uid = uid or -1
f.close()
@staticmethod
def get_ts_format():
return "%Y-%m-%d %H:%M:%S.%f"
def save_timestamp(self, ts):
self._save_state(ts)
def save_uid(self, uid=None):
self._save_state(self.last_ts, uid)
def _save_state(self, ts, uid=None):
try:
self.save_ts_to_file(ts, uid)
except IOError as e:
logging.getLogger('plugin.V1DBMigrator.TimeInterval').error("Unable to save v1 migration TS %s", str(e))
def _read_state(self):
ts = None
try:
with open(self.ts_file, 'r') as f:
ts = datetime.strptime(f.readline().rstrip(), self.get_ts_format())
uid = int(f.readline().rstrip() or -1)
return ts, uid
except IOError:
return ts, -1
except ValueError as e:
logging.getLogger('plugin.V1DBMigrator.TimeInterval').warning(
"Unable to read %s (%s)" % (self.ts_file, str(e)))
return ts, -1
def read_state(self):
self.last_ts, self.last_uid = self._read_state()
if self.last_ts is None:
res = self.v1session.query(func.max(V1History.created)).filter(
V1History.server_id == self.server_id).first()
# set very old datetime if no rows in database
last_ts_from_db = res[0] or datetime(1, 1, 1)
self.last_ts = last_ts_from_db + timedelta(microseconds=1)
def _to_ts(self):
self.read_state()
return self.last_ts - timedelta(microseconds=1)
def is_too_old(self):
return datetime.now() - timedelta(days=30) > self._to_ts()
def get_uid(self):
self.read_state()
return self.last_uid
def convert_username_to_uid(self, username):
pass
def _get_history_gov_users(self):
from_ts, to_ts = self.get_period()
from_ts_ = gm_datetime_to_unixtimestamp(from_ts)
to_ts_ = gm_datetime_to_unixtimestamp(to_ts)
usernames_ = self.v1session.query(V1HistoryGov).filter(
V1HistoryGov.ts.between(from_ts_, to_ts_),
V1HistoryGov.server_id == self.server_id
).distinct(V1HistoryGov.username).group_by(V1HistoryGov.username)
return [item.username for item in usernames_]
def _get_history_uids(self):
from_ts, to_ts = self.get_period()
uids_ = self.v1session.query(V1History).filter(
V1History.created.between(from_ts, to_ts),
V1History.server_id == self.server_id,
V1History.id > self.last_uid
).distinct(V1History.id).group_by(V1History.id)
return [item.id for item in uids_]
def get_uids(self):
uids_list = self._get_history_uids()
for username in self._get_history_gov_users():
uid = self.convert_username_to_uid(username)
if uid is not None and uid > self.last_uid and uid not in uids_list:
uids_list.append(uid)
return sorted(uids_list)
def get_period(self):
""" We want to go 1 hour at a time, up to 1 month back, starting from now """
to_ts = self._to_ts()
from_ts = self.last_ts - timedelta(hours=1)
return from_ts, to_ts
class Break(Exception):
pass
class V1DBMigrator(LveStatsPlugin):
PLUGIN_LOCATION = '/usr/share/lve-stats/plugins/v1_db_migrator.py'
timeout = 18 # change default timeout
is_done = False
period = 60 # every minute
order = 9500 # We pretty much want to be last one standing
v1_connect_string = None
V1Session = None # We will need it to create session on each execution
timeInterval = None
debug = True
skip_on_error = True # What if we cannot save data for some reason, if True, skip it
v2_server_id = 'localhost'
v1_server_id = 'localhost'
def __init__(self):
self.log = logging.getLogger('plugin.V1DBMigrator')
self._username_to_uid_cache = dict()
self._no_such_uid_cache = list()
self._procs = 1
self.now = 0 # This changes in MainLoop
self.log.info("V1 Migration Started")
self._time_commit = self.timeout*0.5 # time limit for stopping plugin
self.control_time = True
self._conn = None
self._database_does_not_exist = False
def set_config(self, config):
self.v1_server_id = config.get('v1_server_id', 'localhost')
self.v2_server_id = config.get('server_id', 'localhost')
self.v1_connect_string = config.get('v1_connect_string')
self.debug = config.get('debug', 'F').lower() in ('t', 'y', 'true', 'yes', 1)
self.init_v1_db()
def init_v1_db(self, ts=STATE_FILE):
if self.v1_connect_string is None:
self._database_does_not_exist = True
return
# check present sqlite database
sqlite = 'sqlite:///'
if self.v1_connect_string.startswith(sqlite) and not os.path.exists(self.v1_connect_string[len(sqlite):]):
self.log.warning('Database "%s" does not exist' % self.v1_connect_string)
self._database_does_not_exist = True
return
# create database engine
try:
v1_db_engine = sqlalchemy.engine.create_engine(self.v1_connect_string, echo=self.debug)
except SQLAlchemyError as e:
self.log.warning(str(e))
self._database_does_not_exist = True
return
# check present history table
if not v1_db_engine.dialect.has_table(v1_db_engine, V1History.__tablename__):
self.log.warning('Table "%s" in database "%s" does not exist' % (V1History.__tablename__, self.v1_connect_string))
self._database_does_not_exist = True
return
result = validate_database(v1_db_engine, hide_logging=True, base=V1Base)
if result['column_error'] or result['table_error']:
self.log.warning('V1 database malformed, migration skipped.')
self._database_does_not_exist = True
return
self.V1Session = sessionmaker(bind=v1_db_engine)
self.timeInterval = V1TimeInterval(self.get_v1_session(), ts, self.v1_server_id)
self.timeInterval.convert_username_to_uid = self.convert_username_to_uid
def get_v1_session(self):
return self.V1Session()
def execute(self, lve_data):
self._procs = lve_data.get('procs', 1)
if self.is_done: # all data had been migrated
return
if self._database_does_not_exist or self.timeInterval.is_too_old():
self.log.warning("V1 Migration Done")
self.cleanup()
self.fix_lost_keep_alive_records()
else:
self.convert_all()
def fix_lost_keep_alive_records(self):
session = sessionmaker(bind=self.engine)()
fix_lost_keep_alive(session, server_id=self.v2_server_id, log_=self.log)
session.close()
def cleanup(self):
"""
There is not much to do on clean up. Lets just set flag done = True, and remove plugin
so that on next restart it would't be running any more
:return:
"""
self.is_done = True
try:
os.remove(V1DBMigrator.PLUGIN_LOCATION)
# remove compiled python code
os.remove(V1DBMigrator.PLUGIN_LOCATION + 'c')
except (IOError, OSError) as e:
self.log.error("Unable to remove %s: %s", V1DBMigrator.PLUGIN_LOCATION, str(e))
session = sessionmaker(bind=self.engine)()
try:
session.query(history_x60).filter(history_x60.server_id == self.v2_server_id).delete()
session.commit()
except SQLAlchemyError:
session.rollback()
def get_v1_gov_data(self, from_ts, to_ts, username):
from_ts_ = gm_datetime_to_unixtimestamp(from_ts)
to_ts_ = gm_datetime_to_unixtimestamp(to_ts)
return self.get_v1_session().query(V1HistoryGov).filter(
V1HistoryGov.ts.between(from_ts_, to_ts_),
V1HistoryGov.username == username,
V1HistoryGov.server_id == self.v1_server_id).all()
def get_v1_data(self, from_ts, to_ts, uid):
return self.get_v1_session().query(V1History).filter(
V1History.created.between(from_ts, to_ts),
V1History.server_id == self.v1_server_id,
V1History.id == uid).order_by(V1History.id).all()
def _convert_data(self, from_ts, to_ts, uid, trans):
username = self.convert_uid_to_username(uid)
try:
v2_rows_insert_list = []
for row in self.get_v1_data(from_ts, to_ts, uid):
v2_rows = self.convert_row(row, self._procs)
v2_rows_insert_list.extend(v2_rows)
if v2_rows_insert_list:
for chunk in get_chunks(v2_rows_insert_list):
self._conn.execute(insert(history), chunk)
v2_gov_rows_insert_list = []
if username and username != 'root': # ignore uid 0 (root)
for row in self.get_v1_gov_data(from_ts, to_ts, username):
v2_gov_rows = self.convert_gov_row(row)
v2_gov_rows_insert_list.extend(v2_gov_rows)
if v2_gov_rows_insert_list:
for chunk in get_chunks(v2_gov_rows_insert_list):
self._conn.execute(insert(history_gov), chunk)
except (SQLAlchemyError, DatabaseError) as e:
trans.rollback()
self.log.warning('Can not save data to database: %s', str(e))
if not self.skip_on_error:
raise e
except LveStatsPluginTerminated:
trans.commit()
self.log.debug("Plugin is terminated.")
raise Break()
def _work_time(self):
return time.time() - self.now # calculate plugin working time
def _need_break(self):
return self.timeout - self._work_time() < self._time_commit*1.2
def convert_data(self, from_ts, to_ts):
self.log.debug('Start converting from %s to %s' % (from_ts, to_ts))
uids = self.timeInterval.get_uids() # obtain uids need convert
if not uids:
return
trans = self._conn.begin()
for uid in uids:
self._convert_data(from_ts, to_ts, uid, trans)
self.timeInterval.save_uid(uid)
self.log.debug(
'Converted from %s to %s uid: %s; plugin work time %s' % (
from_ts, to_ts, uid, self._work_time()))
# control plugin work time
if self.control_time and self._need_break():
self.log.debug(
'Stop converting; plugin work time %s' % self._work_time())
raise Break()
if trans.is_active:
trans.commit()
def convert_all(self):
with self.engine.begin() as self._conn:
try:
while not self._need_break() and not self.timeInterval.is_too_old():
from_ts, to_ts = self.timeInterval.get_period()
self.convert_data(from_ts, to_ts)
self.timeInterval.save_timestamp(from_ts) # save timestamp if not breacke cycle only
except Break: # for break all cycles
pass
time_start = time.time()
commit_time = time.time() - time_start
self._time_commit = max(self._time_commit, commit_time)
self.log.debug('Commit time %s' % commit_time)
@staticmethod
def fault_count(limit, _max):
if limit == _max:
return 1
else:
return 0
@staticmethod
def convert_iops_faults(v1_row, v2_row):
# v1 & v2 store IOPS the same way, but faults are not tracked in v1
v2_row['iops_fault'] = V1DBMigrator.fault_count(v1_row.liops, v1_row.iops_max)
@staticmethod
def convert_io(v1_row, v2_row):
# v1 stores IO in KB/s, v2 in B/s
v2_row['io'] = v1_row.io * 1024
v2_row['io_limit'] = v1_row.io_limit * 1024
v2_row['io_fault'] = V1DBMigrator.fault_count(v1_row.io_limit, v1_row.io_max)
@staticmethod
def convert_cpu_(procs, cpu, cpu_limit, cpu_max, ncpu):
"""
v1 holds CPU relative to total cores, where on 4 core system 1 core is 25%
it also limits by ncpu (whatever is less), so on 4 cores system 2 ncpu and 30% is 30%
of all cores (as 2ncpu = 50%, and we take smaller), and 2 ncpu and 70% is 50%, as
2ncpu = 50% / we take smaller
To switch to new limit, we need to talke old limit and multiply it by 100
So 25% on 4 core system in v1 (1 core), is 25 * 4 * 100 = 10,000
"""
v2_cpu_limit = min(100 * cpu_limit * procs, ncpu * 100 * 100)
# no matter what mistake we make, lets not ever set CPU usage > CPU limit
v2_cpu = min(v2_cpu_limit, cpu * procs * 100)
# if cpu_limit == cpu_max, lets consider it to be a fault, note we loose precision
# anyway, so if weight was 60, we will add 60 faults... oh well.
v2_cpu_faults = V1DBMigrator.fault_count(v2_cpu_limit, 100 * cpu_max * procs)
return v2_cpu, v2_cpu_limit, v2_cpu_faults
def convert_cpu(self, row, v2_row, procs):
v2_row['cpu'], v2_row['cpu_limit'], v2_row['cpu_fault'] = self.convert_cpu_(
procs, row.cpu, row.cpu_limit, row.cpu_max, row.ncpu)
def convert_username_to_uid(self, username):
if username in self._username_to_uid_cache:
return self._username_to_uid_cache[username]
uid = uidconverter._username_to_uid_local(username)
self._username_to_uid_cache[username] = uid
if uid is None:
self.log.warning('Can not find uid for user %s' % username)
return uid
def convert_uid_to_username(self, uid):
if uid in self._no_such_uid_cache:
return
for username_, uid_ in self._username_to_uid_cache.items():
if uid == uid_:
return username_
username_ = uidconverter._uid_to_username_local(uid)
if username_ is None:
self._no_such_uid_cache.append(uid)
self.log.warning('Can not find user name for uid %s' % uid)
else:
self._username_to_uid_cache[username_] = uid
return username_
def convert_gov_row(self, row):
to_ts = row.ts
result = []
for i in range(0, row.weight):
v2_gov_row = {'server_id': self.v2_server_id, 'ts': to_ts - 60 * i}
for key in V2_GOV_KEYS:
v2_gov_row[key] = row.__getattribute__(key)
uid = self.convert_username_to_uid(v2_gov_row.pop('username'))
if uid:
v2_gov_row['uid'] = uid
result.append(v2_gov_row)
return result
def convert_row(self, row, procs):
to_ts = gm_datetime_to_unixtimestamp(row.created)
result = []
for i in range(0, row.weight):
v2_row = {'server_id': self.v2_server_id, 'created': to_ts - 60 * i}
for key in V2_KEYS:
v2_row[key] = row.__getattribute__(key)
self.convert_cpu(row, v2_row, procs)
self.convert_io(row, v2_row)
self.convert_iops_faults(row, v2_row)
result.append(v2_row)
return result
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