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reformatted code to pep8 convention

This commit is contained in:
Guillaume Raffy 2018-08-27 13:32:41 +00:00
parent c750804914
commit 197e94d320
1 changed files with 219 additions and 212 deletions
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431
SimpaDbUtil.py
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@ -1,251 +1,258 @@
import MySQLdb import MySQLdb
import time import time
import subprocess
import StringIO import StringIO
import re import re
from wol import * from wol import *
import os import os
import signal
from Util import * from Util import *
import abc import abc
import sqlite3 import sqlite3
from mysql2sqlite import mysql_to_sqlite from mysql2sqlite import mysql_to_sqlite
def isMachineResponding(machineName): def isMachineResponding(machineName):
(returnCode, stdout, stderr) = executeProgram( [ 'ping', '-o', '-t', '1', machineName ] ) (returnCode, stdout, stderr) = executeProgram(['ping', '-o', '-t', '1', machineName])
#log( 'isMachineResponding : result of command %s : %d' % (command, returnCode) ) # log( 'isMachineResponding : result of command %s : %d' % (command, returnCode) )
if returnCode == 0: if returnCode == 0:
return True return True
else: else:
bMachineNameIsNotKnown = (returnCode == 68) bMachineNameIsNotKnown = (returnCode == 68)
bMachineIsNotResponding = (returnCode == 2) bMachineIsNotResponding = (returnCode == 2)
if bMachineIsNotResponding == False: if bMachineIsNotResponding is False:
bBUG_00000004_IS_STILL_ALIVE = True bBUG_00000004_IS_STILL_ALIVE = True
if bBUG_00000004_IS_STILL_ALIVE == True and returnCode == 142: if bBUG_00000004_IS_STILL_ALIVE is True and returnCode == 142:
log('isMachineResponding : bug00000004 Unexpected return code : returnCode=%d, stdout="%s", stderr="%s" , machineName = %s' % (returnCode, stdout, stderr, machineName) ) log('isMachineResponding : bug00000004 Unexpected return code : returnCode=%d, stdout="%s", stderr="%s" , machineName = %s' % (returnCode, stdout, stderr, machineName))
# don't stop the program until we understand bug00000004 # don't stop the program until we understand bug00000004
elif bBUG_00000004_IS_STILL_ALIVE == True and returnCode == -14: # I had this error code on 07/09/2009 20:38 but I don't know yet what that means elif bBUG_00000004_IS_STILL_ALIVE is True and returnCode == -14: # I had this error code on 07/09/2009 20:38 but I don't know yet what that means
log('isMachineResponding : bug00000004 Unexpected return code : returnCode=%d, stdout="%s", stderr="%s" , machineName = %s' % (returnCode, stdout, stderr, machineName) ) log('isMachineResponding : bug00000004 Unexpected return code : returnCode=%d, stdout="%s", stderr="%s" , machineName = %s' % (returnCode, stdout, stderr, machineName))
# don't stop the program until we understand bug00000004 # don't stop the program until we understand bug00000004
else: else:
log('isMachineResponding : Unexpected return code : returnCode=%d, stdout="%s", stderr="%s" , machineName = %s' % (returnCode, stdout, stderr, machineName) ) log('isMachineResponding : Unexpected return code : returnCode=%d, stdout="%s", stderr="%s" , machineName = %s' % (returnCode, stdout, stderr, machineName))
assert(False) assert(False)
return False return False
class ISqlDatabaseBackend(object): class ISqlDatabaseBackend(object):
def __init__(self): def __init__(self):
pass pass
@abc.abstractmethod
def query(self, sql_query):
"""
:param str sql_query: the sql query to perform
"""
pass
@abc.abstractmethod
def query(self, sql_query):
"""
:param str sql_query: the sql query to perform
"""
pass
class RemoteMysqlDb(ISqlDatabaseBackend): class RemoteMysqlDb(ISqlDatabaseBackend):
def __init__(self, db_server_fqdn, db_user, db_name): def __init__(self, db_server_fqdn, db_user, db_name):
""" """
:param str db_server_fqdn: the fully qualified domain name of the server hosting the database, eg simpatix10.univ-rennes1.fr :param str db_server_fqdn: the fully qualified domain name of the server hosting the database, eg simpatix10.univ-rennes1.fr
:param str db_user: the user for accessing the inventory database, eg simpadb_reader :param str db_user: the user for accessing the inventory database, eg simpadb_reader
:param str db_name: the name of the inventory database, eg simpadb :param str db_name: the name of the inventory database, eg simpadb
""" """
self._db_server_fqdn = db_server_fqdn self._db_server_fqdn = db_server_fqdn
self._db_user = db_user self._db_user = db_user
self._db_name = db_name self._db_name = db_name
self._connect() self._connect()
def _connect(self): def _connect(self):
self._conn = MySQLdb.connect(self._db_server_fqdn, self._db_user, '', self._db_name) self._conn = MySQLdb.connect(self._db_server_fqdn, self._db_user, '', self._db_name)
assert(self._conn) assert(self._conn)
def query(self, sql_query): def query(self, sql_query):
""" """
:param str sql_query: the sql query to perform :param str sql_query: the sql query to perform
""" """
self._conn.query( sql_query ) self._conn.query(sql_query)
rows = conn.store_result() rows = conn.store_result()
return rows return rows
class SqlFile(ISqlDatabaseBackend): class SqlFile(ISqlDatabaseBackend):
def __init__(self, sql_file_path, truncate_hex_strings = False): def __init__(self, sql_file_path, truncate_hex_strings=False):
""" """
:param str sql_file_path: the path of the sql file containing the inventory database :param str sql_file_path: the path of the sql file containing the inventory database
""" """
self._sql_file_path = sql_file_path self._sql_file_path = sql_file_path
self._cur = None # sqlite cursor self._cur = None # sqlite cursor
sqlite_db_path=':memory:' # sqlite-specific special name for a file stored in memory. We could use something like '/tmp/simpadb.sqlite' here but this would make parsing really slow (1 minute instead of 1s), unless either : sqlite_db_path = ':memory:' # sqlite-specific special name for a file stored in memory. We could use something like '/tmp/simpadb.sqlite' here but this would make parsing really slow (1 minute instead of 1s), unless either :
# - proper fix : group of INSERT statements are surrounded by BEGIN and COMMIT (see http://stackoverflow.com/questions/4719836/python-and-sqlite3-adding-thousands-of-rows) # - proper fix : group of INSERT statements are surrounded by BEGIN and COMMIT (see http://stackoverflow.com/questions/4719836/python-and-sqlite3-adding-thousands-of-rows)
# - the file is stored on a solid state disk # - the file is stored on a solid state disk
try: try:
os.remove(sqlite_db_path) os.remove(sqlite_db_path)
except: except:
pass pass
check_same_thread = False check_same_thread = False
# this is to prevent the following error when run from apache/django : SQLite objects created in a thread can only be used in that same thread.The object was created in thread id 139672342353664 and this is thread id 139672333960960 # this is to prevent the following error when run from apache/django : SQLite objects created in a thread can only be used in that same thread.The object was created in thread id 139672342353664 and this is thread id 139672333960960
# accordig to https://stackoverflow.com/questions/48218065/programmingerror-sqlite-objects-created-in-a-thread-can-only-be-used-in-that-sa this is ok, as long as there are no concurrent writes # accordig to https://stackoverflow.com/questions/48218065/programmingerror-sqlite-objects-created-in-a-thread-can-only-be-used-in-that-sa this is ok, as long as there are no concurrent writes
# If set False, the returned connection may be shared across multiple threads. When using multiple threads with the same connection writing operations should be serialized by the user to avoid data corruption # If set False, the returned connection may be shared across multiple threads. When using multiple threads with the same connection writing operations should be serialized by the user to avoid data corruption
# I hope it's safe here but I'm not 100% sure though. Anyway, if the database gets corrupt, it not a big deal since this memory resident database gets reconstructed from the sql file... # I hope it's safe here but I'm not 100% sure though. Anyway, if the database gets corrupt, it not a big deal since this memory resident database gets reconstructed from the sql file...
self._con = sqlite3.connect(sqlite_db_path, check_same_thread=check_same_thread) self._con = sqlite3.connect(sqlite_db_path, check_same_thread=check_same_thread)
f = open(self._sql_file_path, 'r') f = open(self._sql_file_path, 'r')
sql = f.read() # watch out for built-in `str` sql = f.read() # watch out for built-in `str`
#print(sql) # print(sql)
self._cur = self._con.cursor() self._cur = self._con.cursor()
#print(mysql_to_sqlite(sql)) # print(mysql_to_sqlite(sql))
sqlite_sql = mysql_to_sqlite(sql, truncate_hex_strings) sqlite_sql = mysql_to_sqlite(sql, truncate_hex_strings)
#with open('/tmp/toto.sqlite.sql', 'w') as f: # with open('/tmp/toto.sqlite.sql', 'w') as f:
# f.write(sqlite_sql) # f.write(sqlite_sql)
#with open('/tmp/toto.sqlite.sql', 'r') as f: # with open('/tmp/toto.sqlite.sql', 'r') as f:
# sqlite_sql = f.read() # sqlite_sql = f.read()
self._cur.executescript(sqlite_sql) self._cur.executescript(sqlite_sql)
def query(self, sql_query): def query(self, sql_query):
""" """
:param str sql_query: the sql query to perform :param str sql_query: the sql query to perform
""" """
pass pass
self._cur.execute( sql_query ) self._cur.execute(sql_query)
rows = self._cur.fetchall() rows = self._cur.fetchall()
return rows return rows
class SqlDatabaseReader(object): class SqlDatabaseReader(object):
def __init__(self, inv_provider): def __init__(self, inv_provider):
""" """
:param ISqlDatabaseBackend inv_provider: the input that provides the inventory data :param ISqlDatabaseBackend inv_provider: the input that provides the inventory data
""" """
self._inv_provider = inv_provider self._inv_provider = inv_provider
def query(self, sql_query): def query(self, sql_query):
""" """
performs a query on the sql database performs a query on the sql database
:param str sql_query: the sql query to perform :param str sql_query: the sql query to perform
""" """
return self._inv_provider.query(sql_query) return self._inv_provider.query(sql_query)
def get_table_attr(self, table, key_name, key_value, attr_name ): def get_table_attr(self, table, key_name, key_value, attr_name):
""" """
reads the value of the fiven attribute of the given item in the given table reads the value of the fiven attribute of the given item in the given table
:param str table: the name of the table to read :param str table: the name of the table to read
:param str key_name: the name of the column that stores the id of the item to read :param str key_name: the name of the column that stores the id of the item to read
:param str key_value: the id of the item to read :param str key_value: the id of the item to read
:param str attr_name: the name of the attribute to read from the item :param str attr_name: the name of the attribute to read from the item
""" """
attr_value = None attr_value = None
rows = self.query("SELECT "+attr_name+" FROM "+table+" WHERE "+key_name+"='"+key_value+"'") rows = self.query("SELECT " + attr_name + " FROM " + table + " WHERE " + key_name + "='" + key_value + "'")
if len(rows) > 0: if len(rows) > 0:
attr_value = rows[0][0] attr_value = rows[0][0]
return attr_value return attr_value
def machineNameToMacAddress( machineName ):
conn = MySQLdb.connect('simpatix10', 'simpadb_reader', '', 'simpadb')
assert(conn)
sqlQuery = """SELECT mac_address FROM ethernet_cards WHERE machine_name='"""+machineName+"""' AND type='normal'"""
#print sqlQuery
conn.query( sqlQuery )
r=conn.store_result()
row = r.fetch_row(0)
assert( len(row) == 1 )
#print 'row =', row
macAddress = row[0][0]
#print macAddress
conn.close()
return macAddress
def getLightOutManagementIpAddress( machineName ): def machineNameToMacAddress(machineName):
""" conn = MySQLdb.connect('simpatix10', 'simpadb_reader', '', 'simpadb')
the light out management ip of servers allows to talk to the server even when it's asleep assert(conn)
""" sqlQuery = """SELECT mac_address FROM ethernet_cards WHERE machine_name='""" + machineName + """' AND type='normal'"""
conn = MySQLdb.connect('simpatix10', 'simpadb_reader', '', 'simpadb') # print sqlQuery
assert(conn) conn.query(sqlQuery)
sqlQuery = """SELECT ip_address_1,ip_address_2,ip_address_3,ip_address_4 FROM ethernet_cards WHERE machine_name='"""+machineName+"""' AND type='light_out_management'""" r = conn.store_result()
#print sqlQuery row = r.fetch_row(0)
conn.query( sqlQuery ) assert( len(row) == 1)
r=conn.store_result() # print 'row =', row
row = r.fetch_row(0) macAddress = row[0][0]
assert( len(row) == 1 ) # print macAddress
#print 'row =', row conn.close()
ipAddress = ('%s.%s.%s.%s') % (row[0][0], row[0][1], row[0][2], row[0][3]) return macAddress
#print macAddress
conn.close()
return ipAddress def getLightOutManagementIpAddress(machineName):
"""
the light out management ip of servers allows to talk to the server even when it's asleep
"""
conn = MySQLdb.connect('simpatix10', 'simpadb_reader', '', 'simpadb')
assert(conn)
sqlQuery = """SELECT ip_address_1,ip_address_2,ip_address_3,ip_address_4 FROM ethernet_cards WHERE machine_name='""" + machineName + """' AND type='light_out_management'"""
# print sqlQuery
conn.query(sqlQuery)
r = conn.store_result()
row = r.fetch_row(0)
assert(len(row) == 1)
# print 'row =', row
ipAddress = ('%s.%s.%s.%s') % (row[0][0], row[0][1], row[0][2], row[0][3])
# print macAddress
conn.close()
return ipAddress
def getClusterMachinesNames(): def getClusterMachinesNames():
clusterMachinesNames = [] clusterMachinesNames = []
conn = MySQLdb.connect('simpatix10', 'simpadb_reader', '', 'simpadb') conn = MySQLdb.connect('simpatix10', 'simpadb_reader', '', 'simpadb')
assert(conn) assert(conn)
sqlQuery = """SELECT name FROM machines WHERE affectation='cluster'""" sqlQuery = """SELECT name FROM machines WHERE affectation='cluster'"""
#print sqlQuery # print sqlQuery
conn.query( sqlQuery ) conn.query(sqlQuery)
r=conn.store_result() r = conn.store_result()
rows = r.fetch_row(0) rows = r.fetch_row(0)
for row in rows: for row in rows:
#print row # print row
clusterMachinesNames.append( row[0] ) clusterMachinesNames.append(row[0])
conn.close() conn.close()
return clusterMachinesNames return clusterMachinesNames
def machineSupportsIpmi( machineName ):
if (machineName == 'simpatix') or (machineName == 'simpatix01' or (machineName == 'simpa-mac2')):
# the command ipmitool sensor on simpatix doesn't work :
# Unabled to establish a session with the BMC.
# Command failed due to Unknown (0xFFFEF921) (0xFFFEF921)
return False
return True
def putToSleep( machineName ): def machineSupportsIpmi(machineName):
# note : pmset must be executed as root if (machineName == 'simpatix') or (machineName == 'simpatix01' or (machineName == 'simpa-mac2')):
(returnCode, stdout, stderr) = executeCommand([ 'ssh', machineName, 'pmset sleepnow' ]) # the command ipmitool sensor on simpatix doesn't work :
""" # Unabled to establish a session with the BMC.
print returnCode # Command failed due to Unknown (0xFFFEF921) (0xFFFEF921)
print 'stdout :' return False
print stdout return True
print 'stderr :'
print stderr
""" def putToSleep(machineName):
assert( returnCode == 0 ) # note : pmset must be executed as root
# check if the command succeeded by looking at the output (that's the only way I found) (returnCode, stdout, stderr) = executeCommand(['ssh', machineName, 'pmset sleepnow'])
f = StringIO.StringIO(stdout) """
line = f.readline() print returnCode
f.close() print 'stdout :'
matchObj = re.match('^Sleeping now...', line) print stdout
if matchObj: print 'stderr :'
return True print stderr
else: """
return False assert(returnCode == 0)
# check if the command succeeded by looking at the output (that's the only way I found)
f = StringIO.StringIO(stdout)
line = f.readline()
f.close()
matchObj = re.match('^Sleeping now...', line)
if matchObj:
return True
else:
return False
def wakeUp(machineName): def wakeUp(machineName):
macAddress = machineNameToMacAddress( machineName ) macAddress = machineNameToMacAddress(machineName)
wake_on_lan(macAddress) wake_on_lan(macAddress)
return True return True
def isNonRespondingMachineSleeping(machineName): def isNonRespondingMachineSleeping(machineName):
""" """
note : crappy method to detect if the machine is sleeping (if other methods are available, I would be very interested) note : crappy method to detect if the machine is sleeping (if other methods are available, I would be very interested)
""" """
wakeUp(machineName) wakeUp(machineName)
time.sleep(120) time.sleep(120)
if isMachineResponding( machineName ): if isMachineResponding(machineName):
putToSleep( machineName ) putToSleep(machineName)
time.sleep(30) # allow a little time to make sure the machine is ready to receive other wake on lan messages time.sleep(30) # allow a little time to make sure the machine is ready to receive other wake on lan messages
return True return True
else: else:
return False return False
if __name__ == '__main__': if __name__ == '__main__':
""" """
for i in range(30): for i in range(30):
machineName = 'simpatix%d' % (i+10) machineName = 'simpatix%d' % (i+10)
print 'lom ip of %s is %s' % (machineName, getLightOutManagementIpAddress(machineName)) print 'lom ip of %s is %s' % (machineName, getLightOutManagementIpAddress(machineName))
""" """
wakeUp('simpatix21') wakeUp('simpatix21')
#print putToSleep('simpatix13') # print putToSleep('simpatix13')
#print isNonRespondingMachineSleeping('simpatix13') # print isNonRespondingMachineSleeping('simpatix13')