summaryrefslogtreecommitdiffstats
path: root/python.d/bind_rndc.chart.py
blob: 5a9749287bfc617fe098714120a969fd71c3435e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
# -*- coding: utf-8 -*-
# Description: bind rndc netdata python.d module
# Author: l2isbad

from os.path import getsize
from os import access, R_OK
from subprocess import Popen
from collections import defaultdict
from base import SimpleService

priority = 60000
retries = 60
update_every = 30

ORDER = ['name_server_statistics', 'incoming_queries', 'outgoing_queries', 'named_stats_size']

CHARTS = {
    'name_server_statistics': {
        'options': [None, 'Name Server Statistics', 'stats', 'name server statistics',
                    'bind_rndc.name_server_statistics', 'line'],
        'lines': [
            ['nms_requests', 'requests', 'incremental'],
            ['nms_rejected_queries', 'rejected_queries', 'incremental'],
            ['nms_success', 'success', 'incremental'],
            ['nms_failure', 'failure', 'incremental'],
            ['nms_responses', 'responses', 'incremental'],
            ['nms_duplicate', 'duplicate', 'incremental'],
            ['nms_recursion', 'recursion', 'incremental'],
            ['nms_nxrrset', 'nxrrset', 'incremental'],
            ['nms_nxdomain', 'nxdomain', 'incremental'],
            ['nms_non_auth_answer', 'non_auth_answer', 'incremental'],
            ['nms_auth_answer', 'auth_answer', 'incremental'],
            ['nms_dropped_queries', 'dropped_queries', 'incremental'],
        ]},
    'incoming_queries': {
        'options': [None, 'Incoming Queries', 'queries', 'incoming queries',
                    'bind_rndc.incoming_queries', 'line'],
        'lines': [
        ]},
    'outgoing_queries': {
        'options': [None, 'Outgoing Queries', 'queries', 'outgoing queries',
                    'bind_rndc.outgoing_queries', 'line'],
        'lines': [
        ]},
    'named_stats_size': {
        'options': [None, 'Named Stats File Size', 'MB', 'file size',
                    'bind_rndc.stats_size', 'line'],
        'lines': [
            ['stats_size', None, 'absolute', 1, 1 << 20]
        ]}
}

NMS = {
    'nms_requests':
        ['IPv4 requests received',
         'IPv6 requests received',
         'TCP requests received',
         'requests with EDNS(0) receive'],
    'nms_responses':
        ['responses sent',
         'truncated responses sent',
         'responses with EDNS(0) sent',
         'requests with unsupported EDNS version received'],
    'nms_failure':
        ['other query failures',
         'queries resulted in SERVFAIL'],
    'nms_auth_answer':
        ['queries resulted in authoritative answer'],
    'nms_non_auth_answer':
        ['queries resulted in non authoritative answer'],
    'nms_nxrrset':
        ['queries resulted in nxrrset'],
    'nms_success':
        ['queries resulted in successful answer'],
    'nms_nxdomain':
        ['queries resulted in NXDOMAIN'],
    'nms_recursion':
        ['queries caused recursion'],
    'nms_duplicate':
        ['duplicate queries received'],
    'nms_rejected_queries':
        ['auth queries rejected',
         'recursive queries rejected'],
    'nms_dropped_queries':
        ['queries dropped']
}

STATS = ['Name Server Statistics', 'Incoming Queries', 'Outgoing Queries']


class Service(SimpleService):
    def __init__(self, configuration=None, name=None):
        SimpleService.__init__(self, configuration=configuration, name=name)
        self.order = ORDER
        self.definitions = CHARTS
        self.named_stats_path = self.configuration.get('named_stats_path', '/var/log/bind/named.stats')
        self.rndc = self.find_binary('rndc')
        self.data = dict(nms_requests=0, nms_responses=0, nms_failure=0, nms_auth=0,
                         nms_non_auth=0, nms_nxrrset=0, nms_success=0, nms_nxdomain=0,
                         nms_recursion=0, nms_duplicate=0, nms_rejected_queries=0,
                         nms_dropped_queries=0)

    def check(self):
        if not self.rndc:
            self.error('Can\'t locate \'rndc\' binary or binary is not executable by netdata')
            return False

        if not access(self.named_stats_path, R_OK):
            self.error('Cannot access file %s' % self.named_stats_path)
            return False

        run_rndc = Popen([self.rndc, 'stats'], shell=False)
        run_rndc.wait()

        if not run_rndc.returncode:
            return True
        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: dict
        """
        result = dict()
        try:
            current_size = getsize(self.named_stats_path)
            run_rndc = Popen([self.rndc, 'stats'], shell=False)
            run_rndc.wait()

            if run_rndc.returncode:
                return None
            with open(self.named_stats_path) as named_stats:
                named_stats.seek(current_size)
                result['stats'] = named_stats.readlines()
                result['size'] = current_size
                return result
        except (OSError, IOError):
            return None

    def _get_data(self):
        """
        Parse data from _get_raw_data()
        :return: dict
        """

        raw_data = self._get_raw_data()

        if raw_data is None:
            return None
        parsed = dict()
        for stat in STATS:
            parsed[stat] = parse_stats(field=stat,
                                       named_stats=raw_data['stats'])

        self.data.update(nms_mapper(data=parsed['Name Server Statistics']))

        for elem in zip(['Incoming Queries', 'Outgoing Queries'], ['incoming_queries', 'outgoing_queries']):
            parsed_key, chart_name = elem[0], elem[1]
            for dimension_id, value in queries_mapper(data=parsed[parsed_key],
                                                      add=chart_name[:9]).items():
                if dimension_id not in self.data:
                    dimension = dimension_id.replace(chart_name[:9], '')
                    self._add_new_dimension(dimension_id=dimension_id,
                                            dimension=dimension,
                                            chart_name=chart_name,
                                            priority=self.priority + self.order.index(chart_name))
                self.data[dimension_id] = value

        self.data['stats_size'] = raw_data['size']
        return self.data


def parse_stats(field, named_stats):
    """
    :param field: str:
    :param named_stats: list:
    :return: dict

    Example:
    filed: 'Incoming Queries'
    names_stats (list of lines):
    ++ Incoming Requests ++
             1405660 QUERY
                   3 NOTIFY
    ++ Incoming Queries ++
             1214961 A
                  75 NS
                   2 CNAME
                2897 SOA
               35544 PTR
                  14 MX
                5822 TXT
              145974 AAAA
                 371 SRV
    ++ Outgoing Queries ++
    ...

    result:
    {'A', 1214961, 'NS': 75, 'CNAME': 2, 'SOA': 2897, ...}
    """
    data = dict()
    ns = iter(named_stats)
    for line in ns:
        if field not in line:
            continue
        while True:
            try:
                line = next(ns)
            except StopIteration:
                break
            if '++' not in line:
                if '[' in line:
                    continue
                v, k = line.strip().split(' ', 1)
                data[k] = int(v)
                continue
            break
        break
    return data


def nms_mapper(data):
    """
    :param data: dict
    :return: dict(defaultdict)
    """
    result = defaultdict(int)
    for k, v in NMS.items():
        for elem in v:
            result[k] += data.get(elem, 0)
    return result


def queries_mapper(data, add):
    """
    :param data: dict
    :param add: str
    :return: dict
    """
    return dict([(add + k, v) for k, v in data.items()])