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#!/usr/bin/env python
"""
teh (3.10.2014)
"""
import sys
import subprocess
import re
import shlex
import math
num_arg = len(sys.argv)
if num_arg < 4:
print 'Usage: ' + sys.argv[0] + ' <warning threshold> <critical threshold> <server(s)/pool(s) to query>'
sys.exit(3)
try:
warning_threshold = float(sys.argv[1])
critical_threshold = float(sys.argv[2])
except:
print 'Error: warning or critical threshold is not a number.'
sys.exit(3)
servers = ''
if warning_threshold >= critical_threshold:
print 'Error: warning threshold is bigger or equal to critical threshold. That\'s wrong.'
sys.exit(3)
ip_hostname_regex = "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$|^([a-zA-Z0-9\-]+\.){1,16}[a-zA-Z]{2,}$"
valid_server = re.compile(ip_hostname_regex)
for index in range(num_arg):
if index > 2:
arg = sys.argv[index]
if not valid_server.match(arg):
print 'Error: invalid server syntax.'
sys.exit(3)
servers = servers + ' ' + arg
servers = servers.strip()
ntp_cmd = shlex.split('ntpdate -q ' + servers)
ntp = subprocess.Popen(ntp_cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=False)
ntp_output = ntp.communicate()[0]
ntp_rc = ntp.returncode
if ntp_rc != 0:
print 'Error executing ntpdate.'
sys.exit(3)
ntp_output = ntp_output.split()[::-1]
offset_index = ntp_output.index('offset') - 1
offset = float(ntp_output[offset_index])
offset_abs = math.fabs(offset)
offset_str = 'offset ' + '%.6f' % offset + ' sec'
if offset_abs < warning_threshold:
print 'NTP OK: ' + offset_str
sys.exit(0)
elif offset_abs < critical_threshold:
print 'NTP WARNING: ' + offset_str
sys.exit(1)
else:
print 'NTP CRITICAL: ' + offset_str
sys.exit(2)
print 'Error: unknwon error.'
sys.exit(3)