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# -*- coding: utf-8 -*-
# Description: fail2ban log netdata python.d module
# Author: l2isbad
from base import LogService
from re import compile
try:
from itertools import filterfalse
except ImportError:
from itertools import ifilterfalse as filterfalse
from os import access as is_accessible, R_OK
priority = 60000
retries = 60
regex = compile(r'([A-Za-z-]+\]) enabled = ([a-z]+)')
ORDER = ['jails_group']
class Service(LogService):
def __init__(self, configuration=None, name=None):
LogService.__init__(self, configuration=configuration, name=name)
self.order = ORDER
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.default_jails = ['ssh']
try:
self.exclude = self.configuration['exclude'].split()
except (KeyError, AttributeError):
self.exclude = []
def _get_data(self):
"""
Parse new log lines
:return: dict
"""
# If _get_raw_data returns empty list (no new lines in log file) we will send to Netdata this
self.data = {jail: 0 for jail in self.jails_list}
try:
raw = self._get_raw_data()
if raw is None:
return None
elif not raw:
return self.data
except (ValueError, AttributeError):
return None
# Fail2ban logs looks like
# 2016-12-25 12:36:04,711 fail2ban.actions[2455]: WARNING [ssh] Ban 178.156.32.231
self.data = dict(
zip(
self.jails_list,
[len(list(filterfalse(lambda line: (jail + '] Ban') not in line, raw))) for jail in self.jails_list]
))
return self.data
def check(self):
# Check "log_path" is accessible.
# If NOT STOP plugin
if not is_accessible(self.log_path, R_OK):
self.error('Cannot access file %s' % (self.log_path))
return False
# Check "conf_path" is accessible.
# If "conf_path" is accesible try to parse it to find enabled jails
if is_accessible(self.conf_path, R_OK):
with open(self.conf_path, 'rt') as jails_conf:
jails_list = regex.findall(' '.join(jails_conf.read().split()))
self.jails_list = [jail[:-1] for jail, status in jails_list if status == 'true']
else:
self.jails_list = []
self.error('Cannot access jail.local file %s.' % (self.conf_path))
# If for some reason parse failed we still can START with default jails_list.
self.jails_list = [jail for jail in self.jails_list if jail not in self.exclude]\
if self.jails_list else self.default_jails
self.create_dimensions()
self.info('Plugin succefully started. Jails: %s' % (self.jails_list))
return True
def create_dimensions(self):
self.definitions = {'jails_group':
{'options':
[None, "Jails ban statistics", "bans/s", 'Jails', 'jail.ban', 'line'], 'lines': []}}
for jail in self.jails_list:
self.definitions['jails_group']['lines'].append([jail, jail, 'absolute'])
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