/usr/share/check_mk/checks/ntp is in check-mk-server 1.2.8p16-1ubuntu0.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 | #!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# | ____ _ _ __ __ _ __ |
# | / ___| |__ ___ ___| | __ | \/ | |/ / |
# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / |
# | | |___| | | | __/ (__| < | | | | . \ |
# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ |
# | |
# | Copyright Mathias Kettner 2014 mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk 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 in version 2. check_mk is distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY; with-
# out even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE. See the GNU General Public License for more de-
# tails. You should have received a copy of the GNU General Public
# License along with GNU Make; see the file COPYING. If not, write
# to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
# Boston, MA 02110-1301 USA.
ntp_default_levels = (10, 200.0, 500.0) # stratum, ms offset
factory_settings["ntp_time_default_levels"] = {
"ntp_levels" : ntp_default_levels,
"alert_delay" : (300, 3600),
}
# Example output from agent:
# <<<ntp>>>
# - 42.202.61.100 .INIT. 16 u - 1024 0 0.000 0.000 0.000
# * 42.202.62.100 .PPS. 1 u 143 256 377 0.763 -1.424 0.404
# % 42.202.61.14 42.202.62.100 2 u 160 256 357 0.058 -1.532 1.181
# % 42.202.62.14 42.202.62.100 2 u 194 256 357 0.131 -1.364 0.598
# % 42.202.61.10 .INIT. 16 u - 1024 0 0.000 0.000 0.000
# % 42.202.62.10 .INIT. 16 u - 1024 0 0.000 0.000 0.000
# + 42.202.61.15 42.202.62.100 2 u 196 256 356 0.058 0.574 0.204
# + 42.202.62.15 42.202.62.100 2 u 186 256 276 0.088 0.716 0.165
# % 127.127.1.0 .LOCL. 10 l 40 64 377 0.000 0.000 0.001
ntp_state_codes = {
'x' : "falsetick",
'.' : "excess",
'-' : "outlyer",
'+' : "candidat",
'#' : "selected",
'*' : "sys.peer",
'o' : "pps.peer",
'%' : "discarded",
}
# possible values: "summary", "detailed", "both", None
ntp_inventory_mode = "summary"
# We monitor all servers we have reached at least once
def inventory_ntp(info):
if ntp_inventory_mode not in [ "detailed", "both" ]:
return []
inventory = []
for statecode, peer, refid, stratum, t, when, poll, reach, delay, offset, jitter in info:
if reach != "0" and refid != '.LOCL.':
inventory.append((peer, "ntp_default_levels"))
return inventory
def inventory_ntp_summary(info):
if ntp_inventory_mode not in [ "summary", "both" ]:
return []
if len(info) > 0:
return [(None, {})]
def ntp_fmt_time(t):
if t == '-':
return 0
elif t[-1] == "m":
return int(t[:-1]) * 60
elif t[-1] == "h":
return int(t[:-1]) * 60 * 60
elif t[-1] == "d":
return int(t[:-1]) * 60 * 60 * 24
else:
return int(t)
# Helper function that parses the information about one
# peer and returns a tuple of
# 0. Nagios state (0, 1, 2 or 3)
# 1. Nagios check output text
# 2. The offset (only if state != 3)
# 3. The jitter (only if state != 3)
def check_ntp_server_state(line, params):
statecode, peer, refid, stratum, t, when, poll, reach, delay, offset, jitter = line
if reach == "0":
return (3, "peer is unreachable")
offset = float(offset)
jitter = float(jitter)
when = ntp_fmt_time(when)
poll = ntp_fmt_time(poll)
stratum = int(stratum)
state = ntp_state_codes.get(statecode, "unknown")
infotext = "%s - stratum %d, offset %.2f ms, jitter %.2f ms" % (state, stratum, offset, jitter)
if when > 0:
infotext += ", last reached %d secs ago" % when
crit_stratum, warn, crit = params
if abs(offset) >= crit:
return (2, "critical offset" + " " + infotext, offset, jitter)
elif state in [ "falsetick" ]:
return (2, infotext, offset, jitter)
elif stratum >= crit_stratum:
return (2, infotext + (", stratum is too high (max allowed is %d)(!!)" % (crit_stratum - 1)))
# The following check in some cases produces false alarms. The poll interval can
# switch back to a low value while 'when' still being at a high value. While
# this happens only for a short time, it will make the check alarm. So we
# rather switch this condition off:
# elif when > 2*poll and when > 128: # when can exceed poll for small polling values
# return (3, "response due since %d secs%s" % (when - poll, infotext), offset, jitter)
elif abs(offset) >= warn:
return (1, "offset too high" + " " + infotext, offset, jitter)
else:
return (0, infotext, offset, jitter)
def check_ntp(item, params, info):
for line in info:
if line[1] == item and len(line) == 11:
state = check_ntp_server_state(line, params)
if len(state) == 4:
state, text, offset, jitter = state
crit_stratum, warn, crit = params
perfdata = [ ( "offset", offset, warn, crit, 0, None ),
( "jitter", jitter, warn, crit, 0, None ) ]
else:
state, text = state
perfdata = []
return (state, text, perfdata)
return 3, "peer not found", []
def check_ntp_summary(_no_item, params, info):
if type(params) == tuple:
params = {
"ntp_levels" : params,
"alert_delay" : (300, 3600),
}
# No information at all? NTP daemon not running or timeout in ntpq -p
if len(info) == 0:
yield 3, "no information from NTP: timeout in ntpq -p or NTP daemon not running"
return
# We only are interested in our system peer or pulse per second source (pps)
for line in info:
if line[0] in [ "*", "o" ]:
state, text, perfdata = check_ntp(line[1], params["ntp_levels"], [line])
text += " (synchronized on %s)" % line[1]
set_item_state(None, ("sync", time.time(), state, "last successful sync")) # remember last successfull sync
yield state, text, perfdata
return
infotext = "found %d peers, but none is suitable" % len(info)
yield 0, infotext
# Currently no peer is suitable. But we want to tolerate that for a while.
entry = get_item_state(None)
if entry == None:
set_item_state(None, ("init", time.time(), 0, infotext))
yield 0, "just started monitoring"
return
how, last_successful_sync, last_state, last_infotext = entry
time_since_sync = time.time() - last_successful_sync
infotext = "this is %s since " % get_age_human_readable(time_since_sync)
infotext += last_infotext
yield last_state, infotext
warn_time, crit_time = params["alert_delay"]
if time_since_sync >= crit_time:
status = 2
elif time_since_sync >= warn_time:
status = 1
else:
status = 0
if status:
yield status, "(levels at %s/%s)" % (get_age_human_readable(warn_time), get_age_human_readable(crit_time))
check_info["ntp"] = {
'check_function': check_ntp,
'inventory_function': inventory_ntp,
'service_description': 'NTP Peer %s',
'has_perfdata': True,
'group': 'ntp_peer',
}
check_info["ntp.time"] = {
'check_function': check_ntp_summary,
'inventory_function': inventory_ntp_summary,
'service_description': 'NTP Time',
'has_perfdata': True,
'group': 'ntp_time',
'default_levels_variable': "ntp_time_default_levels",
}
|