diff options
Diffstat (limited to 'collectors/python.d.plugin/fail2ban/fail2ban.chart.py')
| -rw-r--r-- | collectors/python.d.plugin/fail2ban/fail2ban.chart.py | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/collectors/python.d.plugin/fail2ban/fail2ban.chart.py b/collectors/python.d.plugin/fail2ban/fail2ban.chart.py new file mode 100644 index 000000000..954689008 --- /dev/null +++ b/collectors/python.d.plugin/fail2ban/fail2ban.chart.py @@ -0,0 +1,196 @@ +# -*- coding: utf-8 -*- +# Description: fail2ban log netdata python.d module +# Author: l2isbad +# SPDX-License-Identifier: GPL-3.0-or-later + +import re +import os + +from collections import defaultdict +from glob import glob + +from bases.FrameworkServices.LogService import LogService + + +ORDER = [ + 'jails_bans', + 'jails_in_jail', +] + + +def charts(jails): + """ + Chart definitions creating + """ + + ch = { + ORDER[0]: { + 'options': [None, 'Jails Ban Rate', 'bans/s', 'bans', 'jail.bans', 'line'], + 'lines': [] + }, + ORDER[1]: { + 'options': [None, 'Banned IPs (since the last restart of netdata)', 'IPs', 'in jail', + 'jail.in_jail', 'line'], + 'lines': [] + }, + } + for jail in jails: + ch[ORDER[0]]['lines'].append([jail, jail, 'incremental']) + ch[ORDER[1]]['lines'].append(['{0}_in_jail'.format(jail), jail, 'absolute']) + + return ch + + +RE_JAILS = re.compile(r'\[([a-zA-Z0-9_-]+)\][^\[\]]+?enabled\s+= (true|false)') + +# Example: +# 2018-09-12 11:45:53,715 fail2ban.actions[25029]: WARNING [ssh] Unban 195.201.88.33 +# 2018-09-12 11:45:58,727 fail2ban.actions[25029]: WARNING [ssh] Ban 217.59.246.27 +RE_DATA = re.compile(r'\[(?P<jail>[A-Za-z-_0-9]+)\] (?P<action>Unban|Ban) (?P<ip>[a-f0-9.:]+)') + +DEFAULT_JAILS = [ + 'ssh', +] + + +class Service(LogService): + 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', str()) + + self.monitoring_jails = list() + self.banned_ips = defaultdict(set) + self.data = dict() + + def check(self): + """ + :return: bool + """ + if not self.conf_path.endswith(('.conf', '.local')): + self.error('{0} is a wrong conf path name, must be *.conf or *.local'.format(self.conf_path)) + return False + + if not os.access(self.log_path, os.R_OK): + self.error('{0} is not readable'.format(self.log_path)) + return False + + if os.path.getsize(self.log_path) == 0: + self.error('{0} is empty'.format(self.log_path)) + return False + + self.monitoring_jails = self.jails_auto_detection() + for jail in self.monitoring_jails: + self.data[jail] = 0 + self.data['{0}_in_jail'.format(jail)] = 0 + + self.definitions = charts(self.monitoring_jails) + self.info('monitoring jails: {0}'.format(self.monitoring_jails)) + + return True + + def get_data(self): + """ + :return: dict + """ + raw = self._get_raw_data() + + if not raw: + return None if raw is None else self.data + + for row in raw: + match = RE_DATA.search(row) + + if not match: + continue + + match = match.groupdict() + + if match['jail'] not in self.monitoring_jails: + continue + + jail, action, ip = match['jail'], match['action'], match['ip'] + + if action == 'Ban': + self.data[jail] += 1 + if ip not in self.banned_ips[jail]: + self.banned_ips[jail].add(ip) + self.data['{0}_in_jail'.format(jail)] += 1 + else: + if ip in self.banned_ips[jail]: + self.banned_ips[jail].remove(ip) + self.data['{0}_in_jail'.format(jail)] -= 1 + + return self.data + + def get_files_from_dir(self, dir_path, suffix): + """ + :return: list + """ + if not os.path.isdir(dir_path): + self.error('{0} is not a directory'.format(dir_path)) + return list() + + return glob('{0}/*.{1}'.format(self.conf_dir, suffix)) + + def get_jails_from_file(self, file_path): + """ + :return: list + """ + if not os.access(file_path, os.R_OK): + self.error('{0} is not readable or not exist'.format(file_path)) + return list() + + with open(file_path, 'rt') as f: + lines = f.readlines() + raw = ' '.join(line for line in lines if line.startswith(('[', 'enabled'))) + + match = RE_JAILS.findall(raw) + # Result: [('ssh', 'true'), ('dropbear', 'true'), ('pam-generic', 'true'), ...] + + if not match: + self.debug('{0} parse failed'.format(file_path)) + return list() + + return match + + def jails_auto_detection(self): + """ + :return: list + + Parses jail configuration files. Returns list of enabled jails. + According man jail.conf parse order must be + * jail.conf + * jail.d/*.conf (in alphabetical order) + * jail.local + * jail.d/*.local (in alphabetical order) + """ + jails_files, all_jails, active_jails = list(), list(), list() + + jails_files.append('{0}.conf'.format(self.conf_path.rsplit('.')[0])) + jails_files.extend(self.get_files_from_dir(self.conf_dir, 'conf')) + jails_files.append('{0}.local'.format(self.conf_path.rsplit('.')[0])) + jails_files.extend(self.get_files_from_dir(self.conf_dir, 'local')) + + self.debug('config files to parse: {0}'.format(jails_files)) + + for f in jails_files: + all_jails.extend(self.get_jails_from_file(f)) + + exclude = self.exclude.split() + + for name, status in all_jails: + if name in exclude: + continue + + if status == 'true' and name not in active_jails: + active_jails.append(name) + elif status == 'false' and name in active_jails: + active_jails.remove(name) + + return active_jails or DEFAULT_JAILS |