checks/chrony

   1 #!/usr/bin/python
   2 # -*- encoding: utf-8; py-indent-offset: 4 -*-
   3 # +------------------------------------------------------------------+
   4 # |             ____ _               _        __  __ _  __           |
   5 # |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
   6 # |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
   7 # |           | |___| | | |  __/ (__|   <    | |  | | . \            |
   8 # |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
   9 # |                                                                  |
  10 # | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
  11 # +------------------------------------------------------------------+
  12 #
  13 # This file is part of Check_MK.
  14 # The official homepage is at http://mathias-kettner.de/check_mk.
  15 #
  16 # check_mk is free software;  you can redistribute it and/or modify it
  17 # under the  terms of the  GNU General Public License  as published by
  18 # the Free Software Foundation in version 2.  check_mk is  distributed
  19 # in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
  20 # out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
  21 # PARTICULAR PURPOSE. See the  GNU General Public License for more de-
  22 # tails. You should have  received  a copy of the  GNU  General Public
  23 # License along with GNU Make; see the file  COPYING.  If  not,  write
  24 # to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
  25 # Boston, MA 02110-1301 USA.
  26
  27 ntp_default_levels = (10, 200.0, 500.0)  # stratum, ms offset
  28
  29 factory_settings["ntp_time_default_levels"] = {
  30     "ntp_levels": ntp_default_levels,
  31     "alert_delay": (300, 3600),
  32 }
  33
  34 # Example output from agent:
  35 # <<<chrony>>>
  36 # Reference ID    : 212.18.3.18 (ntp1.m-online.net)
  37 # Stratum         : 3
  38 # Ref time (UTC)  : Tue Aug 19 16:56:21 2014
  39 # System time     : 0.000000353 seconds fast of NTP time
  40 # Frequency       : 10.725 ppm slow
  41 # Residual freq   : 195.475 ppm
  42 # Skew            : 10.639 ppm
  43 # Root delay      : 0.027455 seconds
  44 # Root dispersion : 0.024512 seconds
  45
  46 # <<<chrony>>>
  47 # 506 Cannot talk to daemon
  48
  49
  50 def parse_chrony(info):
  51     parsed = {}
  52     for line in info:
  53         if ":" in line:
  54             varname, value = " ".join(line).split(":", 1)
  55             parsed[varname.strip()] = value.strip()
  56     return parsed
  57
  58
  59 # We monitor all servers we have reached at least once
  60 def inventory_chrony(info):
  61     parsed = parse_chrony(info)
  62     if parsed:
  63         return [(None, {})]
  64
  65
  66 def check_chrony(_no_item, params, info):
  67     parsed = parse_chrony(info)
  68     if not parsed:
  69         yield 2, "No status information, chronyd probably not running"
  70         return
  71
  72     # Prepare parameters
  73     if isinstance(params, tuple):
  74         params = {
  75             "ntp_levels": params,
  76             "alert_delay": (300, 3600),
  77         }
  78     crit_stratum, warn, crit = params["ntp_levels"]
  79
  80     # Check offset and stratum, output a few info texsts
  81     offset = float(parsed["System time"].split()[0]) * 1000  # converted to ms
  82     stratum = int(parsed["Stratum"])
  83
  84     # Check stratum
  85     infotext = "stratum %d" % stratum
  86     if stratum >= crit_stratum:
  87         yield 2, infotext + " (maximum allowed is %d)" % (crit_stratum - 1)
  88     else:
  89         yield 0, infotext
  90
  91     # Check offset
  92     status = 0
  93     infotext = "offset %.4f ms" % offset
  94     if abs(offset) >= crit:
  95         status = 2
  96     elif abs(offset) >= warn:
  97         status = 1
  98     if status:
  99         infotext += " (warn/crit at %.4f/%.4f ms)" % (warn, crit)
 100     yield status, infotext, [("offset", offset, warn, crit, 0, None)]
 101
 102     # Show additional information
 103     yield 0, "reference: %s" % parsed["Reference ID"]
 104
 105
 106 check_info["chrony"] = {
 107     'check_function': check_chrony,
 108     'inventory_function': inventory_chrony,
 109     'service_description': 'NTP Time',
 110     'has_perfdata': True,
 111     'group': 'ntp_time',
 112     'default_levels_variable': "ntp_time_default_levels",
 113 }