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# -*- coding: utf-8 -*-
# Description: bind rndc netdata python.d module
# Author: l2isbad
# SPDX-License-Identifier: GPL-3.0-or-later
import os
from collections import defaultdict
from subprocess import Popen
from bases.collection import find_binary
from bases.FrameworkServices.SimpleService import SimpleService
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', 'MiB', '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 = 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 (os.path.isfile(self.named_stats_path) and os.access(self.named_stats_path, os.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 = os.path.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], '')
if dimension_id not in self.charts[chart_name]:
self.charts[chart_name].add_dimension([dimension_id, dimension, 'incremental'])
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)
if k not in data:
data[k] = 0
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()])
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