326 lines
10 KiB
Python
Executable file
326 lines
10 KiB
Python
Executable file
#!/usr/bin/python3
|
||
#
|
||
# Vérifie si les domaines listés dans les configurations de Apache,
|
||
# Nginx et Haproxy pointent bien sur le serveur.
|
||
#
|
||
# Développé par Will
|
||
#
|
||
|
||
list_domains_path = '/usr/local/sbin/list_domains.py'
|
||
excludes_path = '/etc/nagios/domains_exclude.list'
|
||
includes_path = '/etc/nagios/domains_include.list'
|
||
|
||
import os
|
||
import sys
|
||
import re
|
||
import subprocess
|
||
import threading
|
||
import time
|
||
import argparse
|
||
import json
|
||
|
||
#import importlib.machinery
|
||
#list_domains = importlib.machinery.SourceFileLoader('list_domains.py', list_domains_path).load_module()
|
||
|
||
|
||
def execute(cmd):
|
||
"""Execute Bash command cmd.
|
||
Return stdout and stderr as arrays of UTF-8 strings."""
|
||
|
||
proc = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
|
||
stdout, stderr = proc.communicate()
|
||
|
||
stdout_lines = stdout.decode('utf-8').splitlines()
|
||
stderr_lines = stderr.decode('utf-8').splitlines()
|
||
|
||
return stdout_lines, stderr_lines
|
||
|
||
|
||
def get_my_ips():
|
||
"""Return localhost IPs."""
|
||
stdout, stderr = execute('hostname -I')
|
||
if not stdout:
|
||
return []
|
||
return stdout[0].strip(' \t').split()
|
||
|
||
|
||
def dig(domain):
|
||
"""Return dig +short result on domain as a list."""
|
||
stdout, stderr = execute('dig +short {}'.format(domain))
|
||
return stdout
|
||
|
||
|
||
def strip_comments(string):
|
||
"""Return string with any # comment removed."""
|
||
return string.split('#')[0]
|
||
|
||
|
||
def list_apache_domains():
|
||
"""Return a dict containing :
|
||
- key: Apache domain (from command "apache2ctl -D DUMP_VHOSTS").
|
||
- value: a list of strings "apache:<VHOST_PATH>:<LINE_IN_BLOCK>"
|
||
"""
|
||
domains = {}
|
||
|
||
try:
|
||
stdout, stderr = execute('apache2ctl -D DUMP_VHOSTS')
|
||
except:
|
||
# Apache is not present on the server
|
||
return domains
|
||
|
||
vhost_infos = ''
|
||
for line in stdout:
|
||
dom = ''
|
||
words = line.strip(' \t').split()
|
||
|
||
if 'namevhost' in line and len(words) >= 5:
|
||
# line format: port <PORT> namevhost <DOMAIN> (<VHOST_PATH>:<LINE_IN_BLOCK>)
|
||
dom = words[3].strip()
|
||
vhost_infos = 'apache:' + words[4].strip('()')
|
||
|
||
elif 'alias' in line and len(words) >= 2:
|
||
# line format: alias <DOMAIN>
|
||
dom = words[1].strip() # vhost_infos defined in previous lines
|
||
|
||
if dom:
|
||
if dom not in domains:
|
||
domains[dom] = []
|
||
if vhost_infos not in domains[dom]:
|
||
domains[dom].append(vhost_infos)
|
||
|
||
return domains
|
||
|
||
|
||
def list_nginx_domains():
|
||
"""Return a dict containing :
|
||
- key: Nginx domain (from command "nginx -T").
|
||
- value: a list of strings "nginx:<VHOST_PATH>:<LINE_IN_BLOCK>"
|
||
"""
|
||
domains = {}
|
||
|
||
try:
|
||
stdout, stderr = execute('nginx -T')
|
||
except:
|
||
# Nginx is not present on the server
|
||
return domains
|
||
|
||
line_number = 1
|
||
config_file_path = ''
|
||
|
||
for line in stdout:
|
||
if '# configuration file' in line:
|
||
# line format : # configuration file <PATH>:
|
||
words = line.strip(' \t;').split()
|
||
config_file_path = words[3].strip(' :')
|
||
continue
|
||
|
||
if 'server_name ' in line:
|
||
# TODO: améliorer le if (cas tabulation)
|
||
# line format : server_name <DOMAIN1> [<DOMAINS2 ...];
|
||
line = strip_comments(line)
|
||
words = line.strip(' \t;').split()
|
||
|
||
for d in words[1:]:
|
||
dom = d.strip()
|
||
vhost_infos = 'nginx:{}:{}'.format(config_file_path, line_number)
|
||
|
||
if dom not in domains:
|
||
domains[dom] = []
|
||
if vhost_infos not in domains[d]:
|
||
domains[dom].append(vhost_infos)
|
||
|
||
line_number += 1 # increment line number for next round
|
||
|
||
if 'server {' in line:
|
||
# TODO: améliorer le if (cas plusieurs espaces)
|
||
# line format : server {
|
||
line_number = 0
|
||
|
||
return domains
|
||
|
||
|
||
class ResolutionThread(threading.Thread):
|
||
|
||
def __init__(self, domain):
|
||
threading.Thread.__init__(self, daemon=True)
|
||
self.domain = domain
|
||
self.ips = []
|
||
|
||
def run(self):
|
||
"""Resolve domain with dig."""
|
||
try:
|
||
dig_results = dig(self.domain)
|
||
|
||
if not dig_results:
|
||
return
|
||
|
||
for line in dig_results:
|
||
match = re.search('^([0-9abcdef\.:]+)$', line)
|
||
if match:
|
||
ip = match.group(1)
|
||
if ip not in self.ips:
|
||
self.ips.append(ip)
|
||
|
||
except Exception as e:
|
||
#print(e)
|
||
return
|
||
|
||
|
||
def run_check_domains(domains):
|
||
"""Check resolution of domains (list)."""
|
||
|
||
excludes = ['_']
|
||
timeout = 5
|
||
|
||
my_ips = get_my_ips()
|
||
|
||
domains_noexcludes = [dom for dom in domains if dom not in excludes]
|
||
|
||
jobs = []
|
||
for dom in domains_noexcludes:
|
||
#print(d)
|
||
t = ResolutionThread(dom)
|
||
t.start()
|
||
jobs.append(t)
|
||
|
||
# Let <timeout> secs to DNS servers to answer in jobs threads
|
||
time.sleep(timeout)
|
||
|
||
timeout_domains = []
|
||
none_domains = []
|
||
outside_ips = {}
|
||
ok_domains = []
|
||
|
||
for j in jobs:
|
||
if j.is_alive():
|
||
timeout_domains.append(j.domain)
|
||
continue
|
||
|
||
if not j.ips:
|
||
none_domains.append(j.domain)
|
||
continue
|
||
|
||
is_outside = False
|
||
for ip in j.ips:
|
||
if ip not in my_ips:
|
||
is_outside = True
|
||
break
|
||
if is_outside:
|
||
outside_ips[j.domain] = j.ips
|
||
else:
|
||
ok_domains.append(j.domain)
|
||
|
||
return timeout_domains, none_domains, outside_ips, ok_domains
|
||
|
||
|
||
def output_check_mode(timeout_domains, none_domains, outside_ips, ok_domains):
|
||
"""Output result for check mode.
|
||
For now, consider everyting as warnings to avoid too much alerts.
|
||
"""
|
||
|
||
n_ok = len(ok_domains)
|
||
n_warnings = len(timeout_domains) + len(none_domains) + len(outside_ips)
|
||
|
||
msg = 'WARNING' if n_warnings else 'OK'
|
||
|
||
print('{} - 0 UNK / 0 CRIT / {} WARN / {} OK \n'.format(msg, n_warnings, n_ok))
|
||
|
||
if timeout_domains or none_domains or outside_ips:
|
||
for d in timeout_domains:
|
||
print('WARNING - timeout resolving {}'.format(d))
|
||
for d in none_domains:
|
||
print('WARNING - no resolution for {}'.format(d))
|
||
for d in outside_ips:
|
||
print('WARNING - {} pointing elsewhere ({})'.format(d, ' '.join(outside_ips[d])))
|
||
|
||
sys.exit(1) if n_warnings else sys.exit(0)
|
||
|
||
|
||
def output_human_mode(doms, timeout_domains, none_domains, outside_ips):
|
||
if timeout_domains or none_domains or outside_ips:
|
||
if timeout_domains: print('\nTimeouts:')
|
||
for d in timeout_domains:
|
||
print('\t{} {}'.format(d, ' '.join(doms[d])))
|
||
if none_domains: print('\nNo resolution:')
|
||
for d in none_domains:
|
||
print('\t{} {}'.format(d, ' '.join(doms[d])))
|
||
if outside_ips: print('\nPointing elsewhere:')
|
||
for d in outside_ips:
|
||
print('\t{} {} -> [{}]'.format(d, ' '.join(doms[d]), ' '.join(outside_ips[d])))
|
||
|
||
sys.exit(1)
|
||
|
||
print('Domains resolve to right IPs !')
|
||
|
||
|
||
def main(argv):
|
||
parser = argparse.ArgumentParser()
|
||
parser.add_argument('action', metavar='ACTION', help='Values: check-dns, list')
|
||
parser.add_argument('-o', '--output-style', help='Values: json (default for action list), human (default for action check-dns), nrpe')
|
||
parser.add_argument('-a', '--all-domains', action='store_true', help='Include all domains (default).')
|
||
parser.add_argument('-ap', '--apache-domains', action='store_true', help='Include Apache domains.')
|
||
parser.add_argument('-ng', '--nginx-domains', action='store_true', help='Include Nginx domains.')
|
||
parser.add_argument('-ha', '--haproxy-domains', action='store_true', help='Include HaProxy domains (not supported yet).')
|
||
args = parser.parse_args()
|
||
|
||
if args.action not in ['check-dns', 'list']:
|
||
if args.output_style == 'nrpe':
|
||
print('UNKNOWN - unknown {} action, use -h option for help.'.format(args.action))
|
||
sys.exit(3)
|
||
else:
|
||
print('Unknown {} action, use -h option for help.'.format(args.action))
|
||
sys.exit(1)
|
||
|
||
if not (args.all_domains or args.apache_domains or args.nginx_domains or args.haproxy_domains):
|
||
print('Domains scope not specified, looking for all domains.')
|
||
args.all_domains = True
|
||
|
||
doms = {}
|
||
|
||
if args.all_domains:
|
||
doms.update(list_apache_domains())
|
||
|
||
else:
|
||
if args.apache_domains:
|
||
doms.update(list_apache_domains())
|
||
if args.nginx_domains:
|
||
doms.update(list_nginx_domains())
|
||
if args.haproxy_domains:
|
||
print('Option --haproxy-domains not supported yet.')
|
||
|
||
if not doms:
|
||
if args.output_style == 'nrpe':
|
||
print('UNKNOWN - No domain found on this server.')
|
||
sys.exit(3)
|
||
else: # == 'json' or 'human'
|
||
print('No domain found on this server.')
|
||
sys.exit(1)
|
||
|
||
if args.action == 'check-dns':
|
||
timeout_domains, none_domains, outside_ips, ok_domains = run_check_domains(doms.keys())
|
||
|
||
if args.output_style == 'nrpe':
|
||
output_check_mode(timeout_domains, none_domains, outside_ips, ok_domains)
|
||
|
||
elif args.output_style == 'json':
|
||
print('Option --output-style json not implemented yet for action check-dns.')
|
||
|
||
else: # args.output_style == 'human'
|
||
output_human_mode(doms, timeout_domains, none_domains, outside_ips)
|
||
|
||
elif args.action == 'list':
|
||
|
||
if args.output_style == 'nrpe':
|
||
print('Action list is not for --output-style nrpe.')
|
||
|
||
elif args.output_style == 'json':
|
||
print(json.dumps(doms, sort_keys=True, indent=4))
|
||
|
||
else:
|
||
print('Option --output-style human not implemented yet for action list, fallback to --output-style json.')
|
||
print(json.dumps(doms, sort_keys=True, indent=4))
|
||
|
||
|
||
if __name__ == '__main__':
|
||
main(sys.argv[1:])
|