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contrib-munin/tools/nagios/check_munin
Andreas Thienemann 3c6692940b Added an check_munin script I had lying around.
If your nagios isntallation uses munin as a passive datasource a check_dummy script is normally installed for the active checks.

This script is a replacement and will be able to query your munin-node to get current values. This is great to manually run a check.
2012-03-07 12:02:30 +01:00

188 lines
4.8 KiB
Python

#!/usr/bin/python
#
# Copyright (C) 2009 Andreas Thienemann <andreas@bawue.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published by
# the Free Software Foundation; version 2 only
#
# 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 Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
#
# Nagios script to query a munin host for plugin values
#
# Can be used as an active check instead of check_dummy
#
import optparse
import socket
import pprint
import sys
import re
parser = optparse.OptionParser("usage: %prog -H <Host> -M <Module> [-P <Port>] -D [<warn>] [<crit>]")
parser.add_option("-H", "--host", dest="host", type="string",
help="specify host to poll")
parser.add_option("-M", "--module", dest="module", type="string",
help="munin module to poll")
parser.add_option("-P", "--port", dest="port", default=4949,
type="int", help="port number to poll")
parser.add_option("-D", "--debug", action="store_true", dest="debug", default=False,
help="Debug output")
(options, args) = parser.parse_args()
HOST = options.host
PORT = options.port
MODULE = options.module
DEBUG = options.debug
if HOST == None or MODULE == None:
parser.error("options -H and -M are required.")
def compare(val, thresh):
# Compare value to warning and critical threshoulds
# Handle different threshold formats: max, :max, min:, min:max
val = float(val)
# max
match = re.match("^[:]?([-+]?[0-9]+)$", str(thresh))
if match:
max = float(match.group(1))
if val > max:
return 3
# min
match = re.match("^([-+]?[0-9]+):$", str(thresh))
if match:
min = float(match.group(1))
if val < min:
return 2
# min:max
match = re.match("^([-+]?[0-9]+):([-+]?[0-9]+)$", str(thresh))
if match:
min, max = float(match.group(1)), float(match.group(2))
if val < min or val > max:
return 1
# okay
return 0
def output(l, cat, desc, ret):
if len(l[cat]) > 0:
print MODULE, desc + ";"
for line in l["critical"]:
print "CRITICAL: " + line + ";"
for line in l["warning"]:
print "WARNING: " + line + ";"
for line in l["ok"]:
print "OK: " + line + ";"
sys.exit(ret)
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
conn = s.makefile('wb', 0)
except:
print "Couldn't connect to requested host"
sys.exit(3)
if conn.readline().startswith("# munin node at"):
conn.writelines("config" + MODULE + "\n")
order = []
data = {}
while True:
line = conn.readline()
if DEBUG:
pprint.pprint(line)
# Last message, bail
if line == ".\n":
break
label = ""
key, val = line.split(" ", 1)
if key.find(".") is not -1:
label = key.split(".")[0]
if label not in data:
data[label] = { "warning" : "", "critical" : "", "value" : "" }
order.append(label)
# No thresholds passed on the command line
if len(args) == 2:
data[label]["warning"] = args[0]
data[label]["critical"] = args[1]
# No thresholds passed on the command line, take the munin supplied ones
if len(args) < 2:
if key.endswith("warning"):
data[label]["warning"] = val[:-1]
if key.endswith("critical"):
data[label]["critical"] = val[:-1]
if data[label]["warning"] == "" or data[label]["critical"] == "":
print "UNKNOWN - Couldn't retrieve thresholds, pass some on the command line"
sys.exit(3)
conn.writelines("fetch " + MODULE + "\n")
while True:
line = conn.readline()
# Last line, bail
if line == ".\n":
if DEBUG:
pprint.pprint(data)
break
key, val = line.split(" ", 1)
label = key.split(".")[0]
if key.endswith("value"):
data[label]["value"] = val[:-1]
conn.writelines("quit\n")
else:
print "UNKNOWN - No munin node detected"
sys.exit(3)
conn.close()
s.close()
l = { "ok" : [], "warning" : [], "critical" : [] }
for entry in order:
# compare actual data: 3 max exceeded, 2 minimum underrun, 1 outside limit, 0 okay
for tresh in ["critical", "warning"]:
val = data[entry]["value"]
tval = data[entry][tresh]
tmp = ""
if compare(val, tval) == 3:
tmp = entry + ": " + val + " has exceeded the maximum threshold of " + tval
break
elif compare(val, tval) == 2:
tmp = entry + ": " + val + " has underrun the minimum threshold of " + tval
break
elif compare(val, tval) == 1:
tmp = entry + ": " + val + " is outside of range " + tval
break
if tmp != "":
l[tresh].append(tmp)
else:
l["ok"].append(entry + ": " + val + " is okay")
output(l, "critical", "CRITICAL", 2)
output(l, "warning", "WARNING", 1)
output(l, "ok", "OK", 0)