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-rw-r--r--python.d/fail2ban.chart.py213
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diff --git a/python.d/fail2ban.chart.py b/python.d/fail2ban.chart.py
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--- a/python.d/fail2ban.chart.py
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-# -*- coding: utf-8 -*-
-# Description: fail2ban log netdata python.d module
-# Author: l2isbad
-
-import bisect
-
-from glob import glob
-from re import compile as r_compile
-from os import access as is_accessible, R_OK
-from os.path import isdir, getsize
-
-
-from bases.FrameworkServices.LogService import LogService
-
-priority = 60000
-retries = 60
-REGEX_JAILS = r_compile(r'\[([a-zA-Z0-9_-]+)\][^\[\]]+?enabled\s+= (true|false)')
-REGEX_DATA = r_compile(r'\[(?P<jail>[A-Za-z-_0-9]+)\] (?P<action>U|B)[a-z]+ (?P<ipaddr>\d{1,3}(?:\.\d{1,3}){3})')
-ORDER = ['jails_bans', 'jails_in_jail']
-
-
-class Service(LogService):
- """
- fail2ban log class
- Reads logs line by line
- Jail auto detection included
- It produces following charts:
- * Bans per second for every jail
- * Banned IPs for every jail (since the last restart of netdata)
- """
- def __init__(self, configuration=None, name=None):
- LogService.__init__(self, configuration=configuration, name=name)
- self.order = ORDER
- self.definitions = dict()
- self.log_path = self.configuration.get('log_path', '/var/log/fail2ban.log')
- self.conf_path = self.configuration.get('conf_path', '/etc/fail2ban/jail.local')
- self.conf_dir = self.configuration.get('conf_dir', '/etc/fail2ban/jail.d/')
- self.exclude = self.configuration.get('exclude')
-
- def _get_data(self):
- """
- Parse new log lines
- :return: dict
- """
- raw = self._get_raw_data()
- if raw is None:
- return None
- elif not raw:
- return self.to_netdata
-
- # Fail2ban logs looks like
- # 2016-12-25 12:36:04,711 fail2ban.actions[2455]: WARNING [ssh] Ban 178.156.32.231
- for row in raw:
- match = REGEX_DATA.search(row)
- if match:
- match_dict = match.groupdict()
- jail, action, ipaddr = match_dict['jail'], match_dict['action'], match_dict['ipaddr']
- if jail in self.jails_list:
- if action == 'B':
- self.to_netdata[jail] += 1
- if address_not_in_jail(self.banned_ips[jail], ipaddr, self.to_netdata[jail + '_in_jail']):
- self.to_netdata[jail + '_in_jail'] += 1
- else:
- if ipaddr in self.banned_ips[jail]:
- self.banned_ips[jail].remove(ipaddr)
- self.to_netdata[jail + '_in_jail'] -= 1
-
- return self.to_netdata
-
- def check(self):
- """
- :return: bool
-
- Check if the "log_path" is not empty and readable
- """
-
- if not (is_accessible(self.log_path, R_OK) and getsize(self.log_path) != 0):
- self.error('%s is not readable or empty' % self.log_path)
- return False
- self.jails_list, self.to_netdata, self.banned_ips = self.jails_auto_detection_()
- self.definitions = create_definitions_(self.jails_list)
- self.info('Jails: %s' % self.jails_list)
- return True
-
- def jails_auto_detection_(self):
- """
- return: <tuple>
-
- * jails_list - list of enabled jails (['ssh', 'apache', ...])
- * to_netdata - dict ({'ssh': 0, 'ssh_in_jail': 0, ...})
- * banned_ips - here will be stored all the banned ips ({'ssh': ['1.2.3.4', '5.6.7.8', ...], ...})
- """
- raw_jails_list = list()
- jails_list = list()
-
- for raw_jail in parse_configuration_files_(self.conf_path, self.conf_dir, self.error):
- raw_jails_list.extend(raw_jail)
-
- for jail, status in raw_jails_list:
- if status == 'true' and jail not in jails_list:
- jails_list.append(jail)
- elif status == 'false' and jail in jails_list:
- jails_list.remove(jail)
- # If for some reason parse failed we still can START with default jails_list.
- jails_list = list(set(jails_list) - set(self.exclude.split()
- if isinstance(self.exclude, str) else list())) or ['ssh']
-
- to_netdata = dict([(jail, 0) for jail in jails_list])
- to_netdata.update(dict([(jail + '_in_jail', 0) for jail in jails_list]))
- banned_ips = dict([(jail, list()) for jail in jails_list])
-
- return jails_list, to_netdata, banned_ips
-
-
-def create_definitions_(jails_list):
- """
- Chart definitions creating
- """
-
- definitions = {
- 'jails_bans': {'options': [None, 'Jails Ban Statistics', 'bans/s', 'bans', 'jail.bans', 'line'],
- 'lines': []},
- 'jails_in_jail': {'options': [None, 'Banned IPs (since the last restart of netdata)', 'IPs',
- 'in jail', 'jail.in_jail', 'line'],
- 'lines': []}}
- for jail in jails_list:
- definitions['jails_bans']['lines'].append([jail, jail, 'incremental'])
- definitions['jails_in_jail']['lines'].append([jail + '_in_jail', jail, 'absolute'])
-
- return definitions
-
-
-def parse_configuration_files_(jails_conf_path, jails_conf_dir, print_error):
- """
- :param jails_conf_path: <str>
- :param jails_conf_dir: <str>
- :param print_error: <function>
- :return: <tuple>
-
- Uses "find_jails_in_files" function to find all jails in the "jails_conf_dir" directory
- and in the "jails_conf_path"
-
- All files must endswith ".local" or ".conf"
- Return order is important.
- According man jail.conf it should be
- * jail.conf
- * jail.d/*.conf (in alphabetical order)
- * jail.local
- * jail.d/*.local (in alphabetical order)
- """
- path_conf, path_local, dir_conf, dir_local = list(), list(), list(), list()
-
- # Parse files in the directory
- if not (isinstance(jails_conf_dir, str) and isdir(jails_conf_dir)):
- print_error('%s is not a directory' % jails_conf_dir)
- else:
- dir_conf = list(filter(lambda conf: is_accessible(conf, R_OK), glob(jails_conf_dir + '/*.conf')))
- dir_local = list(filter(lambda local: is_accessible(local, R_OK), glob(jails_conf_dir + '/*.local')))
- if not (dir_conf or dir_local):
- print_error('%s is empty or not readable' % jails_conf_dir)
- else:
- dir_conf, dir_local = (find_jails_in_files(dir_conf, print_error),
- find_jails_in_files(dir_local, print_error))
-
- # Parse .conf and .local files
- if isinstance(jails_conf_path, str) and jails_conf_path.endswith(('.local', '.conf')):
- path_conf, path_local = (find_jails_in_files([jails_conf_path.split('.')[0] + '.conf'], print_error),
- find_jails_in_files([jails_conf_path.split('.')[0] + '.local'], print_error))
-
- return path_conf, dir_conf, path_local, dir_local
-
-
-def find_jails_in_files(list_of_files, print_error):
- """
- :param list_of_files: <list>
- :param print_error: <function>
- :return: <list>
-
- Open a file and parse it to find all (enabled and disabled) jails
- The output is a list of tuples:
- [('ssh', 'true'), ('apache', 'false'), ...]
- """
- jails_list = list()
- for conf in list_of_files:
- if is_accessible(conf, R_OK):
- with open(conf, 'rt') as f:
- raw_data = f.readlines()
- data = ' '.join(line for line in raw_data if line.startswith(('[', 'enabled')))
- jails_list.extend(REGEX_JAILS.findall(data))
- else:
- print_error('%s is not readable or not exist' % conf)
- return jails_list
-
-
-def address_not_in_jail(pool, address, pool_size):
- """
- :param pool: <list>
- :param address: <str>
- :param pool_size: <int>
- :return: bool
-
- Checks if the address is in the pool.
- If not address will be added
- """
- index = bisect.bisect_left(pool, address)
- if index < pool_size:
- if pool[index] == address:
- return False
- bisect.insort_left(pool, address)
- return True
- else:
- bisect.insort_left(pool, address)
- return True
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 11:00:50 +0000