MyMonPlugins/check_collectd.py

#!/usr/bin/env python
# -*- encoding: utf-8 -*-

#####################################################################
# (c) 2016 by Sven Velt, Germany                                    #
#             sven-mymon-plugins@velt.biz                           #
#                                                                   #
# This file is part of "velt.biz - My Monitoring Plugins"           #
# a fork of "team(ix) Monitoring Plugins" in 2015                   #
# URL: https://github.com/veltbiz/mymonplugins/                     #
#                                                                   #
# This file 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, either version 2 of the License, #
# or (at your option) any later version.                            #
#                                                                   #
# This file 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 General Public License for more details.                      #
#                                                                   #
# You should have received a copy of the GNU General Public License #
# along with this file. If not, see <http://www.gnu.org/licenses/>. #
#####################################################################

import os
import re
import socket
import sys

from collections import OrderedDict

try:
	from monitoringplugin import MonitoringPlugin
except ImportError:
	print '=========================='
	print 'AIKS! Python import error!'
	print '==========================\n'
	print 'Could not find "monitoringplugin.py"!\n'
	print 'Did you download "%s"' % os.path.basename(sys.argv[0])
	print 'without "monitoringplugin.py"?\n'
	print 'Please go back to'
	print 'https://github.com/veltbiz/mymonplugins and download it,'
	print 'or even better:'
	print 'get a full archive at http://github.com/veltbiz/mymonplugins/releases\n'
	sys.exit(127)


plugin = MonitoringPlugin(
		pluginname='check_collectd',
		tagforstatusline='COLLECTD',
		description='Check values of collectd server',
		version='0.1',
	)

SOCKPATHs= [
		'/var/run/collectd-unixsock',
	]

plugin.add_cmdlineoption('-S', '--socket', 'socket', 'path to socket of collectd', default=None)
plugin.add_cmdlineoption('-H', '--host', 'host', 'Hostname (in collectd) to check', default=None)
plugin.add_cmdlineoption('-V', '--value_spec', 'var', 'value to from collectd', default=None)
plugin.add_cmdlineoption('-w', '', 'warn', 'warning thresold', default=None)
plugin.add_cmdlineoption('-c', '', 'crit', 'warning thresold', default=None)

plugin.parse_cmdlineoptions()

if not plugin.options.host:
	plugin.back2nagios(3, 'Need a hostname (-H/--hostname) to check!')

if not plugin.options.var:
	plugin.back2nagios(3, 'Need a value_spec (-V/--value_spec) to check!')


# FIXME: New method: find path (file or dir) and test we can read/write from/to it
if not plugin.options.socket:
	plugin.verbose(2, "Auto-detecting path to collectd's unixsock...")
	for sockpath in SOCKPATHs:
		if os.path.exists(sockpath):
			plugin.options.socket = sockpath
			plugin.verbose(2, 'Found it at "%s"' % sockpath)
			break

if not plugin.options.socket:
	plugin.back2nagios(3, 'Need a socket path (-S/--socket) to connecto to')

if not os.access(plugin.options.socket, os.W_OK):
	plugin.back2nagios(3, 'Could not read from socket "%s"' % plugin.options.socket)
# FIXME: End

s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect(plugin.options.socket)
command = 'GETVAL "%s/%s"\n' % (plugin.options.host, plugin.options.var)
plugin.verbose(3, 'Socket command: %s' % command.rstrip())
s.send(command)
s.shutdown(socket.SHUT_WR)

answer = ''
try:
	while True:
		s.settimeout(10)
		data = s.recv(32768)
		if data:
			answer += data
		else:
			break
except socket.timeout:
	plugin.back2nagios(3, 'Timeout while reading from socket')

answer = answer.split('\n')
plugin.verbose(3, 'Socket answer: %s' % answer)

(status, text) = answer.pop(0).split(' ', 1)
try:
	status = long(status)
except ValueError:
	plugin.back2nagios(3, 'Unknown answer from socket: "%s"' % answer[0])

plugin.verbose(3, 'Socket status code: %s' % status)
if status < 0:
	plugin.back2nagios(3, 'Collectd error: "%s"' % text)

answer = answer[:status]
answer = OrderedDict( [ (p[0], float(p[1])) for p in [ p.split('=') for p in answer ] ] )

for (key,value) in answer.iteritems():
	returncode = plugin.value_wc_to_returncode(value, plugin.options.warn, plugin.options.crit)
	longoutput = '%s: %s' % (key, value)
	perfdata={
			'label': key,
			'value': value,
			'unit': '',
			'warn': plugin.options.warn,
			'crit': plugin.options.crit,
		}
	
	plugin.remember_check(key, returncode, longoutput, perfdata=[perfdata,])

plugin.brain2output()
plugin.exit()










sys.exit(0)

if plugin.options.proto not in ['http', 'https']:
	plugin.back2nagios(3, 'Unknown protocol "' + plugin.options.proto + '"')

if not plugin.options.port:
	if plugin.options.proto == 'https':
		plugin.options.port = '443'
	else:
		plugin.options.port = '80'

url = plugin.options.proto + '://' + plugin.options.host + ':' + plugin.options.port + '/' + plugin.options.url + '?auto'
plugin.verbose(1, 'Status URL: ' + url)

if plugin.options.httpauth:
	httpauth = plugin.options.httpauth.split(':')
	if len(httpauth) != 2:
		plugin.back2nagios(3, 'Wrong format of authentication data! Need "USERNAME:PASSWORD", got "' + plugin.options.httpauth + '"')
	passman = urllib2.HTTPPasswordMgrWithDefaultRealm()
	passman.add_password(None, url, httpauth[0], httpauth[1])
	authhandler = urllib2.HTTPBasicAuthHandler(passman)
	opener = urllib2.build_opener(authhandler)
	urllib2.install_opener(opener)

try:
	data = urllib2.urlopen(url).read()
except urllib2.HTTPError, e:
	plugin.back2nagios(2, 'Could not read data! ' + str(e))
except urllib2.URLError, e:
	plugin.back2nagios(2, 'Could not connect to server!')

plugin.verbose(2, 'Got data:\n' + data)

try:
	idle = int(re.search('Idle(?:Workers|Servers): (\d+)\n', data).group(1))
	busy = int(re.search('Busy(?:Workers|Servers): (\d+)\n', data).group(1))
except:
	plugin.back2nagios(2, 'Could not analyze data!')

description = OrderedDict()
description['_'] = 'waiting for connection'
description['S'] = 'starting up'
description['R'] = 'reading request'
description['W'] = 'writing/sending reply'
description['K'] = 'keepalive'
description['D'] = 'looking up in DNS'
description['C'] = 'closing connection'
description['L'] = 'logging'
description['G'] = 'gracefully finishing'
description['I'] = 'idle cleanup of worker'
description['.'] = 'open slots(up to ServerLimit)'

states = {'_':0, 'S':0, 'R':0, 'W':0, 'K':0, 'D':0, 'C':0, 'L':0, 'G':0, 'I':0, '.':0,}

scoreboard = re.search('Scoreboard: (.*)\n', data)
if scoreboard:
	for worker in scoreboard.group(1):
		states[worker] += 1






if plugin.options.statistics:
	scoreboard = re.search('Scoreboard: (.*)\n', data)
	if scoreboard:
		states = {'_':0, 'S':0, 'R':0, 'W':0, 'K':0, 'D':0, 'C':0, 'L':0, 'G':0, 'I':0, '.':0,}
		for worker in scoreboard.group(1):
			states[worker] += 1
		plugin.add_multilineoutput(str(states['_']) + ' waiting for connection')
		plugin.add_multilineoutput(str(states['S']) + ' starting up')
		plugin.add_multilineoutput(str(states['R']) + ' reading request')
		plugin.add_multilineoutput(str(states['W']) + ' writing/sending reply')
		plugin.add_multilineoutput(str(states['K']) + ' keepalive')
		plugin.add_multilineoutput(str(states['D']) + ' looking up in DNS')
		plugin.add_multilineoutput(str(states['C']) + ' closing connection')
		plugin.add_multilineoutput(str(states['L']) + ' logging')
		plugin.add_multilineoutput(str(states['G']) + ' gracefully finishing')
		plugin.add_multilineoutput(str(states['I']) + ' idle cleanup of worker')
		plugin.add_multilineoutput(str(states['.']) + ' open slots(up to ServerLimit)')

returncode = plugin.value_wc_to_returncode(busy, plugin.options.warn, plugin.options.crit)

plugin.add_output(str(busy) + ' busy workers, ' + str(idle) + ' idle')

plugin.add_returncode(returncode)

plugin.format_add_performancedata('busy', busy, '', warn=plugin.options.warn, crit=plugin.options.crit, min=0.0)
plugin.format_add_performancedata('idle', idle, '')

plugin.exit()