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Check_MK was invented and implemented by Mathias Kettner
<mk@mathias-kettner.de>.
Currently Check_MK is being developed by the Mathias Kettner GmbH
with some contributions by the community (mainly checks).
Please have a look at http://mathias-kettner.de or
http://mathias-kettner.com, if you want to learn more about us.

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA.
Everyone is permitted to copy and distribute verbatim copies
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1.2.8p16

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#!/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.
import os, sys, stat
opt_debug = "-d" in sys.argv or "--debug" in sys.argv
# The following settings are tried to be autodetected
target_values = {
'apache_config_dir' : "Configuration directory of Apache",
'cgiurl' : "URL of Nagios CGI programs",
'check_icmp_path' : "Path to check_icmp Plugin",
'htdocsdir' : "Directory of Nagios' static web pages",
'htpasswd_file' : "File of Nagios' HTTP users and passwords",
'livestatus_in_nagioscfg' : "Wether nagios.cfg loads livestatus module",
'nagconfdir' : "Directory of Nagios objects (see cfg_dir)",
'nagiosaddconf' : "Snippet to add to nagios.cfg",
'nagios_auth_name' : "HTTP Basic AuthName for Nagios",
'nagios_binary' : "Absolute path to Nagios binary itself",
'nagios_version' : "Nagios version",
'nagios_config_file': "Absolute path to nagios.cfg",
'nagios_startscript': "Nagios startskript (usually in /etc/init.d)",
'nagios_status_file': "Absolute path to Nagios' status.dat",
'nagiosurl' : "Base-URL of Nagios web pages",
'nagiosuser' : "System user running the Nagios process",
'nagpipe' : "Absolute path to Nagios' command pipe (nagios.cmd)",
'check_result_path' : "Absolute path to Nagios' checkresults directory",
'pnp_url' : "URL of PNP4Nagios",
'pnpconffile' : "PNP4Nagios configuration file for its PHP pages",
'pnphtdocsdir' : "PNP4Nagios www document root directory",
'pnptemplates' : "directory of PHP templates for PNP4Nagios",
'rrddir' : "Base directory where RRDs are stored",
'wwwgroup' : "Common group of Nagios and Apache",
'wwwuser' : "System user apache runs with",
}
# Ich suche nach Prozessen mit folgenden Kriterien:
# - Der Text 'nagios' im Namen
# - eines der Worte muss '-d' oder '--daemon' sein.
# - Das letzte Wort ist der Name einer existierenden Datei
# Beispiel:
# /usr/sbin/nagios3 -d /etc/nagios3/nagios.cfg
class Sorry(Exception):
def __init__(self, text):
self.reason = text
def find_pid_and_configfile():
procs = os.popen("ps ax -o pid,ppid,user,command").readlines()
pids = []
for line in procs:
if line.find('nagios.cfg') >= 0 or line.find('icinga.cfg') >= 0:
pids.append(line.split()[0])
for line in procs:
if line.find('nagios.cfg') >= 0 or line.find('icinga.cfg') >= 0:
try:
words = line.split()
if '-d' in words or '--daemon' in words:
pid = words[0]
ppid = words[1]
user = words[2]
configfile = words[-1]
if ppid in pids:
continue # this is not the main thread. It has
# another process as parent!
if os.path.exists(configfile):
return int(pid), user, configfile
except Exception, e:
if opt_debug:
raise
raise Sorry("Cannot find Nagios/Icinga process. Is it running?")
def find_apache_properties(nagiosuser, nagios_htdocs_dir):
wwwuser = None
# Search in running processes for Apache
for line in os.popen("ps ax -o pid,user,command").readlines():
parts = line.split()
if len(parts) >= 3 and \
(parts[2].endswith("/apache2") or \
parts[2].endswith("/httpd") or \
parts[2].endswith("/httpd2-prefork") or \
parts[2].endswith("/httpd2-worker")
) and \
parts[1] != 'root':
wwwuser = parts[1]
apache_pid = int(parts[0])
break
if not wwwuser:
raise Exception("Cannot find Apache process. Is it running?")
def scan_apacheconf(apache_conffile):
confdirs = []
if apache_conffile[0] != '/':
apache_conffile = httpd_root + "/" + apache_conffile
confdirs = []
for line in file(apache_conffile):
parts = line.strip().split()
if len(parts) == 2 and parts[0].lower() == "include":
if parts[1].endswith("/") or parts[1].endswith("/*.conf"):
confdir = "/".join(parts[1].split("/")[:-1])
if confdir[0] != "/":
confdir = httpd_root + "/" + confdir
if not os.path.exists(confdir):
continue
confdirs.append(confdir) # put at front of list
else:
try:
confdirs += scan_apacheconf(parts[1]) # recursive scan
except:
pass
return confdirs
# Find binary
try:
nagios_htpasswd_file = None
nagios_auth_name = None
apache_binary = process_executable(apache_pid)
apache_conffile = None
apache_confdir = None
httpd_root = ""
for line in os.popen("%s -V 2>&1" % apache_binary):
parts = line.split()
if parts[0] == "-D" and len(parts) > 1:
p = parts[1].split("=")
if len(p) == 2 and p[0] == "SERVER_CONFIG_FILE":
apache_conffile = p[1].replace('"', "")
elif len(p) == 2 and p[0] == "HTTPD_ROOT":
httpd_root = p[1].replace('"', "")
if apache_conffile:
confdirs = scan_apacheconf(apache_conffile)
if len(confdirs) > 0:
apache_confdir = confdirs[0]
for dir in confdirs:
if dir.endswith("/conf.d"):
apache_confdir = dir
# Search for Nagios configuration. We are interested
# in the authentication configuration. Most Nagios
# installations use HTTP basic auth with a htpasswd
# user file. We want to use that user file for the
# check_mk web pages.
def remove_quotes(text):
try:
if text[0] in '"\'':
text = text[1:]
if text[-1] in '"\'':
text = text[:-1]
except:
pass
return text
auth_files = []
auth_names = []
try:
for confdir in confdirs:
for fn in os.listdir(confdir):
file_good = False
conffile = file(confdir + "/" + fn)
try:
new_auth_names = []
new_auth_files = []
for line in conffile:
if nagios_htdocs_dir in line:
file_good = True
parts = line.split()
if len(parts) == 2 and parts[0].lower() == "authuserfile":
path = remove_quotes(parts[1])
if os.path.exists(path):
new_auth_files.append(path)
if len(parts) > 1 and parts[0].lower() == "authname":
parts = line.split(None, 1)
new_auth_names.append(remove_quotes(parts[1].strip()))
try:
if len(parts) > 1 and parts[0].lower().startswith("<directory") and "pnp4nagios" in line:
cleanedup = line.replace("<", "").replace(">", "").replace('"', "")
cleanedup = cleanedup[9:]
dir = cleanedup.strip()
if os.path.exists(dir) and os.path.exists(dir + "/application/config/config.php"):
result['pnphtdocsdir'] = dir
result['pnptemplates'] = dir + "/templates"
except Exception,e :
pass
if file_good:
auth_names += new_auth_names
auth_files += new_auth_files
except Exception, e:
pass
if len(auth_files) > 0:
nagios_htpasswd_file = auth_files[0]
if len(auth_names) > 0:
nagios_auth_name = auth_names[0]
except:
if opt_debug:
raise
pass
except:
if opt_debug:
raise
apache_confdir = None
nagios_htpasswd_file = None
www_groups = os.popen("id -nG " + wwwuser).read().split()
nagios_groups = os.popen("id -nG " + nagiosuser).read().split()
common_groups = [ g for g in www_groups if g in nagios_groups ]
if len(common_groups) > 1:
if 'nagios' in common_groups:
common_group = 'nagios'
elif 'icinga' in common_groups:
common_group = 'icinga'
else:
common_group = common_groups[0]
elif len(common_groups) == 1:
common_group = common_groups[0]
else:
common_group = None
return wwwuser, common_group, apache_confdir, nagios_htpasswd_file, nagios_auth_name
def process_environment(pid):
# Umgebung des Prozesses bestimmen. Ich brauch das nicht,
# aber der folgende Code ist einfach cool, oder?
try:
env = {}
for line in file("/proc/%d/environ" % pid).read().split("\0"):
if '=' in line:
var, value = entry.split('=', 1)
env[var] = value
return env
except:
raise Sorry("Cannot get environment of process %d. Aren't you root?" %
pid)
def process_executable(pid):
try:
return os.readlink("/proc/%d/exe" % pid).split(" ", 1)[0]
except:
raise Sorry("Cannot get executable of process %d. Aren't you root?" %
pid)
def open_files(pid):
try:
# Liste der offenen Dateien. Das ist schon nuetzlicher,
# denn hier sieht man z.B. die Commandpipe
procpath = "/proc/%d/fd" % pid
return [ os.readlink(procpath + "/" + entry) for entry in os.listdir(procpath) ]
except:
raise Sorry("Cannot get open files of process %d. Aren't you root?" %
pid)
def find_pipes(filenames):
pipes = []
for f in filenames:
try:
mode = os.stat(f)[stat.ST_MODE]
if stat.S_ISFIFO(mode):
pipes.append(f)
except:
pass
return pipes
def parse_nagios_config(configfile):
conf = []
for line in file(configfile):
line = line.strip()
if line == "" or line[0] == '#':
continue
try:
key, value = line.split('=', 1)
conf.append((key, value))
except:
pass # ignore invalid line (as Nagios seems to do)
return conf
def detect_pnp():
global result
# Jetzt will ich noch das Verzeichnis fuer die Schablonen
# von PNP finden. Ich erkenne es daran, dass es ein Verzeichnis
# ist, in dem 'templates' und 'templates.dist' liegen. Dieses
# Verzeichnis liegt hoffentlich innerhalb der Webseite von
# Nagios selbst. Dieser Pfad ist in cgi.cfg festgelegt. Das ganze
# klappt nur bei PNP 0.4
if 'pnptemplates' not in result:
try:
found = []
def func(arg, dirname, names):
if 'templates' in names and 'templates.dist' in names:
found.append(dirname + "/templates")
os.path.walk(cgiconf['physical_html_path'], func, None)
result['pnptemplates'] = found[0]
if 'pnphtdocsdir' not in result:
result['pnphtdocsdir'] = result['pnptemplates'].rsplit('/', 1)[0]
except:
pass
# Suche die Konfigurationsdatei von PNP4Nagios. Denn ich will
# den Eintrag finden, der auf die RRDs zeigt. Den braucht
# check_mk für das direkte Eintragen in die RRD-Datenbanken
try:
pnppath = os.path.dirname(result['pnptemplates'])
index_php = pnppath + "/index.php"
for line in file(index_php):
line = line.strip()
# $config = "/usr/local/nagios/etc/pnp/config";
if line.startswith('$config =') and line.endswith('";'):
pnpconffile = line.split('"')[1] + ".php"
result['pnpconffile'] = pnpconffile
result['pnpconfdir'] = pnpconffile.rsplit("/", 1)[0]
break
except:
pass
try:
# For PNP 0.6
if 'pnpconffile' not in result:
kohanaconf = result['pnphtdocsdir'] + "/application/config/config.php"
if os.path.exists(kohanaconf):
for line in file(kohanaconf):
line = line.strip()
if not line.startswith("#") and "pnp_etc_path" in line:
last = line.split('=')[-1].strip()
dir = last.replace("'", "").replace(";", "").replace('"', "")
if os.path.exists(dir):
result['pnpconfdir'] = dir
result['pnpconffile'] = dir + "/config.php"
except:
pass
try:
for line in file(result['pnpconffile']):
line = line.strip()
if line.startswith("$conf['rrdbase']") and line.endswith('";'):
rrddir = line.split('"')[1]
if rrddir.endswith('/'):
rrddir = rrddir[:-1]
result['rrddir'] = rrddir
elif (line.startswith("$conf['base_url']")
or line.startswith("$conf['pnp_base']")) \
and line.endswith(";"):
pnp_url = line.split('"')[1]
if not pnp_url.endswith("/"):
pnp_url += "/"
result["pnp_url"] = pnp_url
except:
pass
def detect_omd():
site = os.getenv("OMD_SITE")
root = os.getenv("OMD_ROOT")
if not site or not root:
return None
else:
return {
'apache_config_dir' : root + "/etc/apache/conf.d",
'cgiurl' : "/" + site + "/nagios/cgi-bin/",
'check_icmp_path' : root + "/lib/nagios/plugins/check_icmp",
'htdocsdir' : root + "/share/nagios/htdocs",
'htpasswd_file' : root + "/etc/htpasswd",
'livestatus_in_nagioscfg' : False,
'nagconfdir' : root + "/etc/nagios/conf.d",
'nagiosaddconf' : "",
'nagios_auth_name' : "OMD Monitoring Site " + site,
'nagios_binary' : root + "/bin/nagios",
'nagios_config_file' : root + "/tmp/nagios/nagios.cfg",
'nagios_startscript' : root + "/etc/init.d/nagios",
'nagios_status_file' : root + "/var/nagios/status.dat",
'nagiosurl' : "/" + site + "/nagios/",
'nagiosuser' : site,
'nagpipe' : root + "/tmp/run/nagios.cmd",
'check_result_path' : root + "/tmp/nagios/checkresults",
'pnp_url' : "/" + site + "/pnp4nagios/",
'pnpconffile' : root + "/etc/pnp4nagios/config.php",
'pnphtdocsdir' : root + "/share/pnp4nagios/htdocs",
'pnptemplates' : root + "/local/share/check_mk/pnp-templates",
'rrddir' : root + "/var/pnp4nagios/perfdata",
'wwwgroup' : site,
'wwwuser' : site,
}
# _
# _ __ ___ __ _(_)_ __
# | '_ ` _ \ / _` | | '_ \
# | | | | | | (_| | | | | |
# |_| |_| |_|\__,_|_|_| |_|
#
try:
result = detect_omd()
if not result:
result = {}
pid, nagiosuser, configfile = find_pid_and_configfile()
nagios_dir = os.path.dirname(configfile)
result['nagios_config_file'] = configfile
result['nagiosuser'] = nagiosuser
pipes = find_pipes(open_files(pid))
if len(pipes) > 0:
result['nagpipe'] = pipes[0]
# Path to executable
result['nagios_binary'] = process_executable(pid)
# Nagios version
result['nagios_version'] = ""
for line in os.popen(result["nagios_binary"]+ " --version 2>/dev/null"):
if line.startswith("Nagios Core") or line.startswith("Icinga Core"):
result['nagios_version'] = line.split()[2]
# Path to startscript
for path in [ '/etc/init.d/nagios', '/etc/init.d/nagios3', '/etc/init.d/icinga' ]:
if os.path.exists(path):
result['nagios_startscript'] = path
break
nagconf = parse_nagios_config(configfile)
nagconf_dict = dict(nagconf)
if "check_result_path" in nagconf_dict:
result['check_result_path'] = nagconf_dict['check_result_path']
try:
cgifile = os.path.dirname(configfile) + "/cgi.cfg"
cgiconf = dict(parse_nagios_config(cgifile))
result['htdocsdir'] = cgiconf['physical_html_path']
except:
cgiconf = {}
# Suche nach cfg_dir Direktiven. Wir suchen
# einen flauschigen Platz fuer unsere Konfigdateien
cfg_dirs = [ value for key, value in nagconf if key == 'cfg_dir' ]
if len(cfg_dirs) > 0:
# Wenn es mehrere gibt, bevorzuge ich das, das im gleichen
# Verzeichnis, wie die Nagios-Konfigdatei selbst liegt.
# Debian legt ein cfg_dir fuer die Plugins an....
if len(cfg_dirs) == 1:
result['nagconfdir'] = cfg_dirs[0]
else:
dir = os.path.dirname(configfile)
for d in cfg_dirs:
if os.path.dirname(d) == dir:
result['nagconfdir'] = d
break
else:
result['nagconfdir'] = cfg_dirs[0]
else:
# Mist. Kein cfg_dir in nagios.cfg. Das ist z.B. bei
# der immer noch verbreiteten Defaultkonfig der Fall.
# Wir legen einfach selbst eins fest und hängen das
# eigenmächtig hinten an die Config an
nagconfdir = nagios_dir + "/check_mk.d"
result['nagconfdir'] = nagconfdir
result['nagiosaddconf'] = "cfg_dir=" + nagconfdir
# Find path to status.dat, the Nagios status file. We
# need that for the check_mk web pages. Normally the
# path is configured in nagios.cfg. If no - we still
# have a chance by parsing the output of nagios3stats.
nagios_status_file = nagconf_dict.get("status_file")
if not nagios_status_file:
for stats_name in [ "stats", "tats" ]:
try:
stats_bin = result['nagios_binary'] + stats_name
for line in os.popen(stats_bin + " 2>/dev/null"):
if line.startswith("Status File:"):
parts = line.split()
nagios_status_file = parts[-1]
break
elif line.startswith("Error reading status file"):
parts = line.split()
nagios_status_file = parts[-1][1:-1]
break
except:
pass
if nagios_status_file:
result['nagios_status_file'] = nagios_status_file
# Ermittle $USER1$ Variablen, da sie in den Plugin-Pfaden
# auftauchen koennen.
uservars = {}
try:
for line in file(nagconf_dict['resource_file']):
line = line.strip()
if line.startswith('$') and '=' in line:
varname, value = line.split('=', 1)
uservars[varname.strip()] = value.strip()
except:
pass
# Suche nach einem Eintrag zum Laden des livestatus
# Moduls. Er darf auch auskommentiert sein. Dann lassen
# wir den Benutzer damit in Ruhe
found = False
for line in file(configfile):
if "broker_module=" in line and "/livestatus.o" in line:
found = True
break
result['livestatus_in_nagioscfg'] = found
# Jetzt wird's schwieriger: Ich suche nach check_icmp.
# Ich will keinen find machen, da das erstens ewig
# dauern kann und zweitens eventl. eine falsche Stelle
# findet, z.B. innerhalb eines ausgepackten und kompilierten
# Quellcodes der nagios-plugins. Daher suche ich in
# allen Objektdateien von Nagios nach command_line.
# Damit ermittle ich alle Verzeichnisse, in denen Plugins
# liegen. Dort suche ich dann nach check_icmp. Zur Sicherheit
# suche ich aber auch unter '/usr/lib/nagios' und '/usr/local/nagios/libexec'
# und '/usr/local/nagios/plugins'
found = []
for dir in cfg_dirs:
os.path.walk(dir, lambda x,dirname,names: found.append((dirname, names)), None)
plugin_paths = []
for dirname, names in found:
for name in names:
if name.endswith(".cfg"):
path = dirname + "/" + name
try:
for line in file(path):
if line.strip() == '':
continue
parts = line.strip().split()
if parts[0] == "command_line":
path = parts[1]
for var, value in uservars.items():
path = path.replace(var, value)
if path.startswith('/') and path not in plugin_paths:
plugin_paths.append(path)
except:
pass
for dir in plugin_paths + \
[ '/usr/lib/nagios/plugins',
'/usr/lib64/nagios/plugins',
'/usr/local/nagios/libexec',
'/usr/local/nagios/plugins' ]:
try:
mode = os.stat(dir)[stat.ST_MODE]
if not stat.S_ISDIR(mode):
dir = os.path.dirname(dir)
filenames = os.listdir(dir)
for filename in filenames:
if filename == 'check_icmp':
result['check_icmp_path'] = dir + '/' + filename
break
except:
pass
# Die Basis-Url fuer Nagios ist leider auch nicht immer
# gleich
try:
result['nagiosurl'] = cgiconf['url_html_path']
result['cgiurl'] = result['nagiosurl'] + "/cgi-bin"
except:
pass
# Suche eine Gruppe, die Nagios mit dem Apache gemeinsam
# hat. Diese brauchen wir z.B. für logwatch
try:
wwwuser, wwwgroup, apache_confdir, nagios_htpasswd_file, nagios_auth_name = \
find_apache_properties(nagiosuser, result['htdocsdir'])
if wwwuser:
result['wwwuser'] = wwwuser
if wwwgroup:
result['wwwgroup'] = wwwgroup
if apache_confdir:
result['apache_config_dir'] = apache_confdir
if nagios_htpasswd_file:
result['htpasswd_file'] = nagios_htpasswd_file
if nagios_auth_name:
result['nagios_auth_name'] = nagios_auth_name
except Exception, e:
sys.stderr.write("\033[1;41;35m Cannot determine Apache properties. \033[0m\n"
"Reason: %s\n" % e)
detect_pnp()
print "# Result of autodetection"
for var, value in result.items():
print
descr = target_values.get(var)
if descr:
print "# %s" % descr
else:
print "# (unknown value)"
print "%s='%s'" % (var, value)
for var, descr in target_values.items():
if var not in result:
print
print "# %s" % descr
print "# NOT DETECTED: %s" % var
except Sorry, e:
sys.stderr.write("\033[1;41;35m Sorry: %s \033[0m\n" % e.reason)
sys.exit(1)
except Exception, e:
if opt_debug:
raise
else:
sys.stderr.write("* Sorry, something unexpected happened: %s\n\n" % e)
import traceback
traceback.print_exc()
sys.exit(1)

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