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check_ntp_sync_by_ssh.py
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check_ntp_sync_by_ssh.py
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#!/usr/bin/env python
# Copyright (C) 2013:
# Gabes Jean, naparuba@gmail.com
# Pasche Sebastien, sebastien.pasche@leshop.ch
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
#
'''
This script is a check for lookup at memory consumption over ssh without
having an agent on the other side
'''
import os
import sys
import optparse
# Ok try to load our directory to load the plugin utils.
my_dir = os.path.dirname(__file__)
sys.path.insert(0, my_dir)
try:
import schecks
except ImportError:
print "ERROR : this plugin needs the local schecks.py lib. Please install it"
sys.exit(2)
VERSION = "0.1"
DEFAULT_WARNING = '10'
DEFAULT_CRITICAL = '60'
NTPQ_PATH=r"""ntpq"""
DEFAULT_DELAY_WARNING = '0.100' # 100 ms
DEFAULT_DELAY_CRITICAL = '0.150' # 150 ms
DEFAULT_OFFSET_WARNING = '0.0025' # 2.5 ms
DEFAULT_OFFSET_CRITICAL = '0.005' # 5ms
def get_ntp_sync(client):
# We are looking for a line like
# remote refid st t when poll reach delay offset jitter
#==============================================================================
# 127.127.1.0 .LOCL. 10 l 53 64 377 0.000 0.000 0.001
# *blabla blabla 3 u 909 1024 377 0.366 -3.200 5.268
#raw = r"""/usr/sbin/ntpq -p"""
raw = "%s -p" % NTPQ_PATH
stdin, stdout, stderr = client.exec_command("export LC_LANG=C && unset LANG && export PATH=$PATH:/usr/bin:/usr/sbin && %s" % raw)
errs = ''.join(l for l in stderr)
if errs:
print "Error: %s" % errs.strip()
client.close()
sys.exit(2)
ref_delay = None
for line in stdout:
line = line.strip()
# We want the line of the reference only
if not line or not line.startswith('*'):
continue
tmp = [e for e in line.split(' ') if e]
ref_delay = abs(float(tmp[8])) / 1000
# Before return, close the client
client.close()
return ref_delay
def get_chrony_sync(client):
# We are looking for a line like
#Reference ID : 195.141.190.190 (time.sunrise.net)
#Stratum : 3
#Ref time (UTC) : Fri Jun 28 09:03:22 2013
#System time : 0.000147811 seconds fast of NTP time
#Last offset : 0.000177244 seconds
#RMS offset : 0.000363876 seconds
#Frequency : 26.497 ppm slow
#Residual freq : 0.024 ppm
#Skew : 0.146 ppm
#Root delay : 0.008953 seconds
#Root dispersion : 0.027807 seconds
#Update interval : 1024.1 seconds
#Leap status : Normal
raw = r"""chronyc tracking"""
stdin, stdout, stderr = client.exec_command("export LC_LANG=C && unset LANG && %s" % raw)
errs = ''.join(l for l in stderr)
if errs:
print "Error: %s" % errs.strip()
client.close()
sys.exit(2)
delay = offset = None
for line in stdout:
line = line.strip()
tmp = line.split(':')
if len(tmp) != 2:
continue
if line.startswith('RMS offset'):
offset = float(tmp[1].strip().split(' ')[0])
if line.startswith('Root delay'):
delay = float(tmp[1].strip().split(' ')[0])
# Before return, close the client
client.close()
return delay, offset
parser = optparse.OptionParser(
"%prog [options]", version="%prog " + VERSION)
parser.add_option('-H', '--hostname',
dest="hostname", help='Hostname to connect to')
parser.add_option('-p', '--port',
dest="port", type="int", default=22,
help='SSH port to connect to. Default : 22')
parser.add_option('-i', '--ssh-key',
dest="ssh_key_file",
help='SSH key file to use. By default will take ~/.ssh/id_rsa.')
parser.add_option('-u', '--user',
dest="user", help='remote use to use. By default shinken.')
parser.add_option('-P', '--passphrase',
dest="passphrase", help='SSH key passphrase. By default will use void')
parser.add_option('-w', '--warning',
dest="warning",
help='Warning delay for ntp, like 10. couple delay,offset value for chrony '
'0.100,0.0025')
parser.add_option('-c', '--critical',
dest="critical",
help='Warning delay for ntp, like 10. couple delay,offset value for chrony '
'0.150,0.005')
parser.add_option('-C', '--chrony', action='store_true',
dest="chrony", help='check Chrony instead of ntpd')
parser.add_option('-n', '--ntpq',
dest="ntpq", help="remote ntpq bianry path")
if __name__ == '__main__':
# Ok first job : parse args
opts, args = parser.parse_args()
if args:
parser.error("Does not accept any argument.")
port = opts.port
hostname = opts.hostname or ''
ntpq = opts.ntpq
if ntpq:
NTPQ_PATH=ntpq
ssh_key_file = opts.ssh_key_file or os.path.expanduser('~/.ssh/id_rsa')
user = opts.user or 'shinken'
passphrase = opts.passphrase or ''
chrony = opts.chrony
if not chrony:
# Try to get numeic warning/critical values
s_warning = opts.warning or DEFAULT_WARNING
s_critical = opts.critical or DEFAULT_CRITICAL
warning, critical = schecks.get_warn_crit(s_warning, s_critical)
else:
if opts.warning:
warning_delay = float(opts.warning.split(',')[0])
warning_offset = float(opts.warning.split(',')[1])
else:
warning_delay = float(DEFAULT_DELAY_WARNING)
warning_offset = float(DEFAULT_OFFSET_WARNING)
if opts.critical:
critical_delay = float(opts.critical.split(',')[0])
critical_offset = float(opts.critical.split(',')[1])
else:
critical_delay = float(DEFAULT_DELAY_CRITICAL)
critical_offset = float(DEFAULT_OFFSET_CRITICAL)
# Ok now connect, and try to get values for memory
client = schecks.connect(hostname, port, ssh_key_file, passphrase, user)
if not chrony:
ref_delay = get_ntp_sync(client)
if not ref_delay:
print "Warning : There is no sync ntp server"
sys.exit(1)
perfdata = "delay=%.2fs;%.2fs;%.2fs;;" % (ref_delay, warning, critical)
if ref_delay > critical:
print "Critical: ntp delay is %.2fs | %s" %(ref_delay, perfdata)
sys.exit(2)
if ref_delay > warning:
print "Warning: ntp delay is %.2fs | %s" %(ref_delay, perfdata)
sys.exit(2)
print "OK: ntp delay is %.2fs | %s" %(ref_delay, perfdata)
sys.exit(0)
else:
delay, offset = get_chrony_sync(client)
if not delay or not offset:
print "Warning : cannot get delay or offset value"
sys.exit(1)
perfdata = "delay=%.2fs;%.2fs;%.2fs;;" % (delay, warning_delay, critical_delay)
perfdata += "offset=%.4fs;%.4fs;%.4fs;;" % (offset, warning_offset, critical_offset)
if delay > critical_delay:
print "Critical: ntp/chrony delay is %.2fs | %s" % (delay, perfdata)
sys.exit(2)
if offset > critical_offset:
print "Critical: ntp/chrony offset is %.4fs | %s" % (offset, perfdata)
sys.exit(2)
if delay > warning_delay:
print "Warning: ntp/chrony delay is %.2fs | %s" % (delay, perfdata)
sys.exit(2)
if offset > warning_offset:
print "Warning: ntp/chrony offset is %.4fs | %s" % (offset, perfdata)
sys.exit(2)
print "OK: ntp delay is %.2fs offset is %.4fs | %s" %(delay, offset, perfdata)
sys.exit(0)