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check_mssql_server.py
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check_mssql_server.py
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#!/usr/bin/env python
########################################################################
# check_mssql_server - A Nagios plugin to check Microsoft SQL Server
# Copyright (C) 2016 Nicholas Scott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
################### check_mssql_server.py ##############################
# Version : 2.1.0
# Date : 06/09/2016
# Maintainer : Nagios Enterprises, LLC
# Licence : GPLv3 (http://www.fsf.org/licenses/gpl.txt)
########################################################################
import pymssql
import time
import sys
import tempfile
try:
import cPickle as pickle
except:
import pickle
from optparse import OptionParser, OptionGroup
BASE_QUERY = "SELECT cntr_value FROM sysperfinfo WHERE counter_name='%s' AND instance_name='';"
INST_QUERY = "SELECT cntr_value FROM sysperfinfo WHERE counter_name='%s' AND instance_name='%s';"
OBJE_QUERY = "SELECT cntr_value FROM sysperfinfo WHERE counter_name='%s';"
DIVI_QUERY = "SELECT cntr_value FROM sysperfinfo WHERE counter_name LIKE '%s%%' AND instance_name='%s';"
CON_QUERY = "SELECT count(*) FROM sys.sysprocesses;"
MEM_QUERY = "SELECT 100*(1.0-(available_physical_memory_kb/(total_physical_memory_kb*1.0))) FROM sys.dm_os_sys_memory;"
CPU_QUERY = "SELECT "+\
"record.value('(./Record/SchedulerMonitorEvent/SystemHealth/ProcessUtilization)[1]', 'int') AS [CPU] "+\
"FROM ( "+\
"SELECT[timestamp], CONVERT(XML, record) AS [record] "+\
"FROM sys.dm_os_ring_buffers WITH ( NOLOCK ) "+\
"WHERE ring_buffer_type=N'RING_BUFFER_SCHEDULER_MONITOR' "+\
"AND record LIKE N'%<SystemHealth>%'"+\
") as x;"
MODES = {
'connections' : { 'help' : 'Number of open connections',
'stdout' : 'Number of open connections is %s',
'label' : 'connections',
'type' : 'standard',
'query' : CON_QUERY
},
'memory' : { 'help' : 'Used server memory',
'stdout' : 'Server using %s%% of memory',
'label' : 'memory',
'query' : MEM_QUERY
},
'cpu' : { 'help' : 'Server CPU utilization',
'stdout' : 'Current CPU utilization is %s%%',
'lablel' : 'cpu',
'query' : CPU_QUERY
},
'bufferhitratio' : { 'help' : 'Buffer Cache Hit Ratio',
'stdout' : 'Buffer Cache Hit Ratio is %s%%',
'label' : 'buffer_cache_hit_ratio',
'unit' : '%',
'query' : DIVI_QUERY % ('Buffer cache hit ratio', ''),
'type' : 'divide',
'modifier' : 100,
},
'pagelooks' : { 'help' : 'Page Lookups Per Second',
'stdout' : 'Page Lookups Per Second is %s',
'label' : 'page_lookups',
'query' : BASE_QUERY % 'Page lookups/sec',
'type' : 'delta'
},
'freepages' : { 'help' : 'Free Pages (Cumulative)',
'stdout' : 'Free pages is %s',
'label' : 'free_pages',
'type' : 'standard',
'query' : BASE_QUERY % 'Free pages'
},
'totalpages' : { 'help' : 'Total Pages (Cumulative)',
'stdout' : 'Total pages is %s',
'label' : 'totalpages',
'type' : 'standard',
'query' : BASE_QUERY % 'Total pages',
},
'targetpages' : { 'help' : 'Target Pages',
'stdout' : 'Target pages are %s',
'label' : 'target_pages',
'type' : 'standard',
'query' : BASE_QUERY % 'Target pages',
},
'databasepages' : { 'help' : 'Database Pages',
'stdout' : 'Database pages are %s',
'label' : 'database_pages',
'type' : 'standard',
'query' : BASE_QUERY % 'Database pages',
},
'stolenpages' : { 'help' : 'Stolen Pages',
'stdout' : 'Stolen pages are %s',
'label' : 'stolen_pages',
'type' : 'standard',
'query' : BASE_QUERY % 'Stolen pages',
},
'lazywrites' : { 'help' : 'Lazy Writes / Sec',
'stdout' : 'Lazy Writes / Sec is %s/sec',
'label' : 'lazy_writes',
'query' : BASE_QUERY % 'Lazy writes/sec',
'type' : 'delta'
},
'readahead' : { 'help' : 'Readahead Pages / Sec',
'stdout' : 'Readahead Pages / Sec is %s/sec',
'label' : 'readaheads',
'query' : BASE_QUERY % 'Readahead pages/sec',
'type' : 'delta',
},
'pagereads' : { 'help' : 'Page Reads / Sec',
'stdout' : 'Page Reads / Sec is %s/sec',
'label' : 'page_reads',
'query' : BASE_QUERY % 'Page reads/sec',
'type' : 'delta'
},
'checkpoints' : { 'help' : 'Checkpoint Pages / Sec',
'stdout' : 'Checkpoint Pages / Sec is %s/sec',
'label' : 'checkpoint_pages',
'query' : BASE_QUERY % 'Checkpoint pages/Sec',
'type' : 'delta'
},
'pagewrites' : { 'help' : 'Page Writes / Sec',
'stdout' : 'Page Writes / Sec is %s/sec',
'label' : 'page_writes',
'query' : BASE_QUERY % 'Page writes/sec',
'type' : 'delta',
},
'lockrequests' : { 'help' : 'Lock Requests / Sec',
'stdout' : 'Lock Requests / Sec is %s/sec',
'label' : 'lock_requests',
'query' : INST_QUERY % ('Lock requests/sec', '_Total'),
'type' : 'delta',
},
'locktimeouts' : { 'help' : 'Lock Timeouts / Sec',
'stdout' : 'Lock Timeouts / Sec is %s/sec',
'label' : 'lock_timeouts',
'query' : INST_QUERY % ('Lock timeouts/sec', '_Total'),
'type' : 'delta',
},
'deadlocks' : { 'help' : 'Deadlocks / Sec',
'stdout' : 'Deadlocks / Sec is %s/sec',
'label' : 'deadlocks',
'query' : INST_QUERY % ('Number of Deadlocks/sec', '_Total'),
'type' : 'delta',
},
'lockwaits' : { 'help' : 'Lockwaits / Sec',
'stdout' : 'Lockwaits / Sec is %s/sec',
'label' : 'lockwaits',
'query' : INST_QUERY % ('Lock Waits/sec', '_Total'),
'type' : 'delta',
},
'lockwait' : { 'help' : 'Lock Wait Time (ms)',
'stdout' : 'Lock Wait Time (ms) is %sms',
'label' : 'lockwait',
'unit' : 'ms',
'query' : INST_QUERY % ('Lock Wait Time (ms)', '_Total'),
'type' : 'standard',
},
'averagewait' : { 'help' : 'Average Wait Time (ms)',
'stdout' : 'Average Wait Time (ms) is %sms',
'label' : 'averagewait',
'unit' : 'ms',
'query' : DIVI_QUERY % ('Average Wait Time', '_Total'),
'type' : 'divide',
},
'pagesplits' : { 'help' : 'Page Splits / Sec',
'stdout' : 'Page Splits / Sec is %s/sec',
'label' : 'page_splits',
'query' : OBJE_QUERY % 'Page Splits/sec',
'type' : 'delta',
},
'cachehit' : { 'help' : 'Cache Hit Ratio',
'stdout' : 'Cache Hit Ratio is %s%%',
'label' : 'cache_hit_ratio',
'query' : DIVI_QUERY % ('Cache Hit Ratio', '_Total'),
'type' : 'divide',
'unit' : '%',
'modifier' : 100,
},
'batchreq' : { 'help' : 'Batch Requests / Sec',
'stdout' : 'Batch Requests / Sec is %s/sec',
'label' : 'batch_requests',
'query' : OBJE_QUERY % 'Batch Requests/sec',
'type' : 'delta',
},
'sqlcompilations' : { 'help' : 'SQL Compilations / Sec',
'stdout' : 'SQL Compilations / Sec is %s/sec',
'label' : 'sql_compilations',
'query' : OBJE_QUERY % 'SQL Compilations/sec',
'type' : 'delta',
},
'fullscans' : { 'help' : 'Full Scans / Sec',
'stdout' : 'Full Scans / Sec is %s/sec',
'label' : 'full_scans',
'query' : OBJE_QUERY % 'Full Scans/sec',
'type' : 'delta',
},
'pagelife' : { 'help' : 'Page Life Expectancy',
'stdout' : 'Page Life Expectancy is %s/sec',
'label' : 'page_life_expectancy',
'query' : OBJE_QUERY % 'Page life expectancy',
'type' : 'standard'
},
#~ 'debug' : { 'help' : 'Used as a debugging tool.',
#~ 'stdout' : 'Debugging: ',
#~ 'label' : 'debug',
#~ 'query' : DIVI_QUERY % ('Average Wait Time', '_Total'),
#~ 'type' : 'divide'
#~ },
'time2connect' : { 'help' : 'Time to connect to the database.' },
'test' : { 'help' : 'Run tests of all queries against the database.' },
}
def return_nagios(options, stdout='', result='', unit='', label=''):
if is_within_range(options.critical, result):
prefix = 'CRITICAL: '
code = 2
elif is_within_range(options.warning, result):
prefix = 'WARNING: '
code = 1
else:
prefix = 'OK: '
code = 0
strresult = str(result)
try:
stdout = stdout % (strresult)
except TypeError, e:
pass
stdout = '%s%s|%s=%s%s;%s;%s;;' % (prefix, stdout, label, strresult, unit, options.warning or '', options.critical or '')
raise NagiosReturn(stdout, code)
class NagiosReturn(Exception):
def __init__(self, message, code):
self.message = message
self.code = code
class MSSQLQuery(object):
def __init__(self, query, options, label='', unit='', stdout='', host='', modifier=1, *args, **kwargs):
self.query = query
self.label = label
self.unit = unit
self.stdout = stdout
self.options = options
self.host = host
self.modifier = modifier
def run_on_connection(self, connection):
cur = connection.cursor()
cur.execute(self.query)
self.query_result = cur.fetchone()[0]
def finish(self):
return_nagios( self.options,
self.stdout,
self.result,
self.unit,
self.label )
def calculate_result(self):
self.result = float(self.query_result) * self.modifier
def do(self, connection):
self.run_on_connection(connection)
self.calculate_result()
self.finish()
class MSSQLDivideQuery(MSSQLQuery):
def __init__(self, *args, **kwargs):
super(MSSQLDivideQuery, self).__init__(*args, **kwargs)
def calculate_result(self):
if self.query_result[1] != 0:
self.result = (float(self.query_result[0]) / self.query_result[1]) * self.modifier
else:
self.result = float(self.query_result[0]) * self.modifier
def run_on_connection(self, connection):
cur = connection.cursor()
cur.execute(self.query)
self.query_result = [x[0] for x in cur.fetchall()]
class MSSQLDeltaQuery(MSSQLQuery):
def make_pickle_name(self):
tmpdir = tempfile.gettempdir()
tmpname = hash(self.host + self.query)
self.picklename = '%s/mssql-%s.tmp' % (tmpdir, tmpname)
def calculate_result(self):
self.make_pickle_name()
try:
tmpfile = open(self.picklename)
except IOError:
tmpfile = open(self.picklename, 'w')
tmpfile.close()
tmpfile = open(self.picklename)
try:
try:
last_run = pickle.load(tmpfile)
except EOFError, ValueError:
last_run = { 'time' : None, 'value' : None }
finally:
tmpfile.close()
if last_run['time']:
old_time = last_run['time']
new_time = time.time()
old_val = last_run['query_result']
new_val = self.query_result
self.result = ((new_val - old_val) / (new_time - old_time)) * self.modifier
else:
self.result = None
new_run = { 'time' : time.time(), 'query_result' : self.query_result }
#~ Will throw IOError, leaving it to acquiesce
tmpfile = open(self.picklename, 'w')
pickle.dump(new_run, tmpfile)
tmpfile.close()
def parse_args():
usage = "usage: %prog -H hostname -U user -P password -T table --mode"
parser = OptionParser(usage=usage)
required = OptionGroup(parser, "Required Options")
required.add_option('-H' , '--hostname', help='Specify MSSQL Server Address', default=None)
required.add_option('-U' , '--user', help='Specify MSSQL User Name', default=None)
required.add_option('-P' , '--password', help='Specify MSSQL Password', default=None)
parser.add_option_group(required)
connection = OptionGroup(parser, "Optional Connection Information")
connection.add_option('-I', '--instance', help='Specify instance', default=None)
connection.add_option('-p', '--port', help='Specify port.', default=None)
parser.add_option_group(connection)
nagios = OptionGroup(parser, "Nagios Plugin Information")
nagios.add_option('-w', '--warning', help='Specify warning range.', default=None)
nagios.add_option('-c', '--critical', help='Specify critical range.', default=None)
parser.add_option_group(nagios)
mode = OptionGroup(parser, "Mode Options")
global MODES
for k, v in zip(MODES.keys(), MODES.values()):
mode.add_option('--%s' % k, action="store_true", help=v.get('help'), default=False)
parser.add_option_group(mode)
options, _ = parser.parse_args()
if not options.hostname:
parser.error('Hostname is a required option.')
if not options.user:
parser.error('User is a required option.')
if not options.password:
parser.error('Password is a required option.')
if options.instance and options.port:
parser.error('Cannot specify both instance and port.')
options.mode = None
for arg in mode.option_list:
if getattr(options, arg.dest) and options.mode:
parser.error("Must choose one and only Mode Option.")
elif getattr(options, arg.dest):
options.mode = arg.dest
return options
def is_within_range(nagstring, value):
if not nagstring:
return False
import re
import operator
first_float = r'(?P<first>(-?[0-9]+(\.[0-9]+)?))'
second_float= r'(?P<second>(-?[0-9]+(\.[0-9]+)?))'
actions = [ (r'^%s$' % first_float,lambda y: (value > float(y.group('first'))) or (value < 0)),
(r'^%s:$' % first_float,lambda y: value < float(y.group('first'))),
(r'^~:%s$' % first_float,lambda y: value > float(y.group('first'))),
(r'^%s:%s$' % (first_float,second_float), lambda y: (value < float(y.group('first'))) or (value > float(y.group('second')))),
(r'^@%s:%s$' % (first_float,second_float), lambda y: not((value < float(y.group('first'))) or (value > float(y.group('second')))))]
for regstr,func in actions:
res = re.match(regstr,nagstring)
if res:
return func(res)
raise Exception('Improper warning/critical format.')
def connect_db(options):
host = options.hostname
if options.instance:
host += "\\" + options.instance
elif options.port:
host += ":" + options.port
start = time.time()
mssql = pymssql.connect(host = host, user = options.user, password = options.password, database='master')
total = time.time() - start
return mssql, total, host
def main():
options = parse_args()
mssql, total, host = connect_db(options)
if options.mode =='test':
run_tests(mssql, options, host)
elif not options.mode or options.mode == 'time2connect':
return_nagios( options,
stdout='Time to connect was %ss',
label='time',
unit='s',
result=total )
else:
execute_query(mssql, options, host)
def execute_query(mssql, options, host=''):
sql_query = MODES[options.mode]
sql_query['options'] = options
sql_query['host'] = host
query_type = sql_query.get('type')
if query_type == 'delta':
mssql_query = MSSQLDeltaQuery(**sql_query)
elif query_type == 'divide':
mssql_query = MSSQLDivideQuery(**sql_query)
else:
mssql_query = MSSQLQuery(**sql_query)
mssql_query.do(mssql)
def run_tests(mssql, options, host):
failed = 0
total = 0
del MODES['time2connect']
del MODES['test']
for mode in MODES.keys():
total += 1
options.mode = mode
try:
execute_query(mssql, options, host)
except NagiosReturn:
print "%s passed!" % mode
except Exception, e:
failed += 1
print "%s failed with: %s" % (mode, e)
print '%d/%d tests failed.' % (failed, total)
if __name__ == '__main__':
try:
main()
except pymssql.OperationalError, e:
print e
sys.exit(3)
except pymssql.InterfaceError, e:
print e
sys.exit(3)
except IOError, e:
print e
sys.exit(3)
except NagiosReturn, e:
print e.message
sys.exit(e.code)
except Exception, e:
print type(e)
print "Caught unexpected error. This could be caused by your sysperfinfo not containing the proper entries for this query, and you may delete this service check."
sys.exit(3)