--- /dev/null
+# -*- coding: utf-8 -*-
+# Description: bind rndc netdata python.d module
+# Author: l2isbad
+
+from base import SimpleService
+from re import compile, findall
+from os.path import getsize, isfile, split
+from os import access as is_accessible, R_OK
+from subprocess import Popen
+
+priority = 60000
+retries = 60
+update_every = 30
+
+DIRECTORIES = ['/bin/', '/usr/bin/', '/sbin/', '/usr/sbin/']
+
+
+class Service(SimpleService):
+ def __init__(self, configuration=None, name=None):
+ SimpleService.__init__(self, configuration=configuration, name=name)
+ self.named_stats_path = self.configuration.get('named_stats_path', '/var/log/bind/named.stats')
+ self.regex_values = compile(r'([0-9]+) ([^\n]+)')
+ # self.options = ['Incoming Requests', 'Incoming Queries', 'Outgoing Queries',
+ # 'Name Server Statistics', 'Zone Maintenance Statistics', 'Resolver Statistics',
+ # 'Cache DB RRsets', 'Socket I/O Statistics']
+ self.options = ['Name Server Statistics']
+ self.regex_options = [r'(%s(?= \+\+)) \+\+([^\+]+)' % option for option in self.options]
+ try:
+ self.rndc = [''.join([directory, 'rndc']) for directory in DIRECTORIES
+ if isfile(''.join([directory, 'rndc']))][0]
+ except IndexError:
+ self.rndc = False
+
+ def check(self):
+
+ # We cant start without 'rndc' command
+ if not self.rndc:
+ self.error('Command "rndc" not found')
+ return False
+
+ # We cant if stats file is not exist or not readable by netdata user
+ if not is_accessible(self.named_stats_path, R_OK):
+ self.error('Cannot access file %s' % self.named_stats_path)
+ return False
+
+ size_before = getsize(self.named_stats_path)
+ run_rndc = Popen([self.rndc, 'stats'], shell=False)
+ run_rndc.wait()
+ size_after = getsize(self.named_stats_path)
+
+ # We cant start if netdata user has no permissions to run 'rndc stats'
+ if not run_rndc.returncode:
+ # 'rndc' was found, stats file is exist and readable and we can run 'rndc stats'. Lets go!
+ self.create_charts()
+
+ # BIND APPEND dump on every run 'rndc stats'
+ # that is why stats file size can be VERY large if update_interval too small
+ dump_size_24hr = round(86400 / self.update_every * (int(size_after) - int(size_before)) / 1048576, 3)
+
+ # If update_every too small we should WARN user
+ if self.update_every < 30:
+ self.info('Update_every %s is NOT recommended for use. Increase the value to > 30' % self.update_every)
+
+ self.info('With current update_interval it will be + %s MB every 24hr. '
+ 'Don\'t forget to create logrotate conf file for %s' % (dump_size_24hr, self.named_stats_path))
+
+ self.info('Plugin was started successfully.')
+
+ return True
+ else:
+ self.error('Not enough permissions to run "%s stats"' % self.rndc)
+ return False
+
+ def _get_raw_data(self):
+
+ """
+ Run 'rndc stats' and read last dump from named.stats
+ :return: tuple(
+ file.read() obj,
+ named.stats file size
+ )
+ """
+
+ try:
+ current_size = getsize(self.named_stats_path)
+ except OSError:
+ return None, None
+
+ run_rndc = Popen([self.rndc, 'stats'], shell=False)
+ run_rndc.wait()
+
+ if run_rndc.returncode:
+ return None, None
+
+ try:
+ with open(self.named_stats_path) as bind_rndc:
+ bind_rndc.seek(current_size)
+ result = bind_rndc.read()
+ except OSError:
+ return None, None
+ else:
+ return result, current_size
+
+ def _get_data(self):
+
+ """
+ Parse data from _get_raw_data()
+ :return: dict
+ """
+
+ raw_data, size = self._get_raw_data()
+
+ if raw_data is None:
+ return None
+
+ rndc_stats = dict()
+
+ for regex in self.regex_options:
+ rndc_stats.update({k: [(y, int(x)) for x, y in self.regex_values.findall(v)]
+ for k, v in findall(regex, raw_data)})
+
+ nms = dict(rndc_stats.get('Name Server Statistics', []))
+
+ to_netdata = dict()
+
+ to_netdata['requests'] = sum([v for k, v in nms.items() if 'request' in k and 'received' in k])
+ to_netdata['responses'] = sum([v for k, v in nms.items() if 'responses' in k and 'sent' in k])
+ to_netdata['success'] = nms.get('queries resulted in successful answer', 0)
+ to_netdata['auth_answer'] = nms.get('queries resulted in authoritative answer', 0)
+ to_netdata['nonauth_answer'] = nms.get('queries resulted in non authoritative answer', 0)
+ to_netdata['nxrrset'] = nms.get('queries resulted in nxrrset', 0)
+ to_netdata['failure'] = sum([nms.get('queries resulted in SERVFAIL', 0), nms.get('other query failures', 0)])
+ to_netdata['nxdomain'] = nms.get('queries resulted in NXDOMAIN', 0)
+ to_netdata['recursion'] = nms.get('queries caused recursion', 0)
+ to_netdata['duplicate'] = nms.get('duplicate queries received', 0)
+ to_netdata['rejections'] = nms.get('recursive queries rejected', 0)
+ to_netdata['stats_size'] = size
+
+ return to_netdata
+
+ def create_charts(self):
+
+ self.order = ['stats_size', 'bind_stats']
+ self.definitions = {
+ 'bind_stats': {
+ 'options': [None, 'Name Server Statistics', 'stats', 'NS Statistics', 'bind_rndc.stats', 'line'],
+ 'lines': [
+ ["requests", None, "incremental"], ["responses", None, "incremental"],
+ ["success", None, "incremental"], ["auth_answer", None, "incremental"],
+ ["nonauth_answer", None, "incremental"], ["nxrrset", None, "incremental"],
+ ["failure", None, "incremental"], ["nxdomain", None, "incremental"],
+ ["recursion", None, "incremental"], ["duplicate", None, "incremental"],
+ ["rejections", None, "incremental"]
+ ]},
+ 'stats_size': {
+ 'options': [None, '%s file size' % split(self.named_stats_path)[1].capitalize(), 'megabyte',
+ '%s size' % split(self.named_stats_path)[1].capitalize(), 'bind_rndc.size', 'line'],
+ 'lines': [
+ ["stats_size", None, "absolute", 1, 1048576]
+ ]}
+ }