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# -*- coding: utf-8 -*-
# Description: unbound netdata python.d module
# Author: Austin S. Hemmelgarn (Ferroin)
# SPDX-License-Identifier: GPL-3.0-or-later
import os
import sys
from copy import deepcopy
from bases.FrameworkServices.SocketService import SocketService
from bases.loaders import YamlOrderedLoader
PRECISION = 1000
ORDER = [
'queries',
'recursion',
'reqlist',
]
CHARTS = {
'queries': {
'options': [None, 'Queries Processed', 'queries', 'Unbound', 'unbound.queries', 'line'],
'lines': [
['ratelimit', 'ratelimited', 'absolute', 1, 1],
['cachemiss', 'cache_miss', 'absolute', 1, 1],
['cachehit', 'cache_hit', 'absolute', 1, 1],
['expired', 'expired', 'absolute', 1, 1],
['prefetch', 'prefetched', 'absolute', 1, 1],
['recursive', 'recursive', 'absolute', 1, 1]
]
},
'recursion': {
'options': [None, 'Recursion Timings', 'seconds', 'Unbound', 'unbound.recursion', 'line'],
'lines': [
['recursive_avg', 'average', 'absolute', 1, PRECISION],
['recursive_med', 'median', 'absolute', 1, PRECISION]
]
},
'reqlist': {
'options': [None, 'Request List', 'items', 'Unbound', 'unbound.reqlist', 'line'],
'lines': [
['reqlist_avg', 'average_size', 'absolute', 1, 1],
['reqlist_max', 'maximum_size', 'absolute', 1, 1],
['reqlist_overwritten', 'overwritten_requests', 'absolute', 1, 1],
['reqlist_exceeded', 'overruns', 'absolute', 1, 1],
['reqlist_current', 'current_size', 'absolute', 1, 1],
['reqlist_user', 'user_requests', 'absolute', 1, 1]
]
}
}
# These get added too if we are told to use extended stats.
EXTENDED_ORDER = ['cache']
EXTENDED_CHARTS = {
'cache': {
'options': [None, 'Cache Sizes', 'items', 'Unbound', 'unbound.cache', 'stacked'],
'lines': [
['cache_message', 'message_cache', 'absolute', 1, 1],
['cache_rrset', 'rrset_cache', 'absolute', 1, 1],
['cache_infra', 'infra_cache', 'absolute', 1, 1],
['cache_key', 'dnssec_key_cache', 'absolute', 1, 1],
['cache_dnscss', 'dnscrypt_Shared_Secret_cache', 'absolute', 1, 1],
['cache_dnscn', 'dnscrypt_Nonce_cache', 'absolute', 1, 1]
]
}
}
# This is used as a templates for the per-thread charts.
PER_THREAD_CHARTS = {
'_queries': {
'options': [None, '{longname} Queries Processed', 'queries', 'Queries Processed',
'unbound.threads.queries', 'line'],
'lines': [
['{shortname}_ratelimit', 'ratelimited', 'absolute', 1, 1],
['{shortname}_cachemiss', 'cache_miss', 'absolute', 1, 1],
['{shortname}_cachehit', 'cache_hit', 'absolute', 1, 1],
['{shortname}_expired', 'expired', 'absolute', 1, 1],
['{shortname}_prefetch', 'prefetched', 'absolute', 1, 1],
['{shortname}_recursive', 'recursive', 'absolute', 1, 1]
]
},
'_recursion': {
'options': [None, '{longname} Recursion Timings', 'seconds', 'Recursive Timings',
'unbound.threads.recursion', 'line'],
'lines': [
['{shortname}_recursive_avg', 'average', 'absolute', 1, PRECISION],
['{shortname}_recursive_med', 'median', 'absolute', 1, PRECISION]
]
},
'_reqlist': {
'options': [None, '{longname} Request List', 'items', 'Request List', 'unbound.threads.reqlist', 'line'],
'lines': [
['{shortname}_reqlist_avg', 'average_size', 'absolute', 1, 1],
['{shortname}_reqlist_max', 'maximum_size', 'absolute', 1, 1],
['{shortname}_reqlist_overwritten', 'overwritten_requests', 'absolute', 1, 1],
['{shortname}_reqlist_exceeded', 'overruns', 'absolute', 1, 1],
['{shortname}_reqlist_current', 'current_size', 'absolute', 1, 1],
['{shortname}_reqlist_user', 'user_requests', 'absolute', 1, 1]
]
}
}
# This maps the Unbound stat names to our names and precision requiremnets.
STAT_MAP = {
'total.num.queries_ip_ratelimited': ('ratelimit', 1),
'total.num.cachehits': ('cachehit', 1),
'total.num.cachemiss': ('cachemiss', 1),
'total.num.zero_ttl': ('expired', 1),
'total.num.prefetch': ('prefetch', 1),
'total.num.recursivereplies': ('recursive', 1),
'total.requestlist.avg': ('reqlist_avg', 1),
'total.requestlist.max': ('reqlist_max', 1),
'total.requestlist.overwritten': ('reqlist_overwritten', 1),
'total.requestlist.exceeded': ('reqlist_exceeded', 1),
'total.requestlist.current.all': ('reqlist_current', 1),
'total.requestlist.current.user': ('reqlist_user', 1),
'total.recursion.time.avg': ('recursive_avg', PRECISION),
'total.recursion.time.median': ('recursive_med', PRECISION),
'msg.cache.count': ('cache_message', 1),
'rrset.cache.count': ('cache_rrset', 1),
'infra.cache.count': ('cache_infra', 1),
'key.cache.count': ('cache_key', 1),
'dnscrypt_shared_secret.cache.count': ('cache_dnscss', 1),
'dnscrypt_nonce.cache.count': ('cache_dnscn', 1)
}
# Same as above, but for per-thread stats.
PER_THREAD_STAT_MAP = {
'{shortname}.num.queries_ip_ratelimited': ('{shortname}_ratelimit', 1),
'{shortname}.num.cachehits': ('{shortname}_cachehit', 1),
'{shortname}.num.cachemiss': ('{shortname}_cachemiss', 1),
'{shortname}.num.zero_ttl': ('{shortname}_expired', 1),
'{shortname}.num.prefetch': ('{shortname}_prefetch', 1),
'{shortname}.num.recursivereplies': ('{shortname}_recursive', 1),
'{shortname}.requestlist.avg': ('{shortname}_reqlist_avg', 1),
'{shortname}.requestlist.max': ('{shortname}_reqlist_max', 1),
'{shortname}.requestlist.overwritten': ('{shortname}_reqlist_overwritten', 1),
'{shortname}.requestlist.exceeded': ('{shortname}_reqlist_exceeded', 1),
'{shortname}.requestlist.current.all': ('{shortname}_reqlist_current', 1),
'{shortname}.requestlist.current.user': ('{shortname}_reqlist_user', 1),
'{shortname}.recursion.time.avg': ('{shortname}_recursive_avg', PRECISION),
'{shortname}.recursion.time.median': ('{shortname}_recursive_med', PRECISION)
}
# Used to actually generate per-thread charts.
def _get_perthread_info(thread):
sname = 'thread{0}'.format(thread)
lname = 'Thread {0}'.format(thread)
charts = dict()
order = []
statmap = dict()
for item in PER_THREAD_CHARTS:
cname = '{0}{1}'.format(sname, item)
chart = deepcopy(PER_THREAD_CHARTS[item])
chart['options'][1] = chart['options'][1].format(longname=lname)
for index, line in enumerate(chart['lines']):
chart['lines'][index][0] = line[0].format(shortname=sname)
order.append(cname)
charts[cname] = chart
for key, value in PER_THREAD_STAT_MAP.items():
statmap[key.format(shortname=sname)] = (value[0].format(shortname=sname), value[1])
return (charts, order, statmap)
class Service(SocketService):
def __init__(self, configuration=None, name=None):
# The unbound control protocol is always TLS encapsulated
# unless it's used over a UNIX socket, so enable TLS _before_
# doing the normal SocketService initialization.
configuration['tls'] = True
self.port = 8935
SocketService.__init__(self, configuration, name)
self.ext = self.configuration.get('extended', None)
self.ubconf = self.configuration.get('ubconf', None)
self.perthread = self.configuration.get('per_thread', False)
self.threads = None
self.order = deepcopy(ORDER)
self.definitions = deepcopy(CHARTS)
self.request = 'UBCT1 stats\n'
self.statmap = deepcopy(STAT_MAP)
self._parse_config()
self._auto_config()
self.debug('Extended stats: {0}'.format(self.ext))
self.debug('Per-thread stats: {0}'.format(self.perthread))
if self.ext:
self.order = self.order + EXTENDED_ORDER
self.definitions.update(EXTENDED_CHARTS)
if self.unix_socket:
self.debug('Using unix socket: {0}'.format(self.unix_socket))
else:
self.debug('Connecting to: {0}:{1}'.format(self.host, self.port))
self.debug('Using key: {0}'.format(self.key))
self.debug('Using certificate: {0}'.format(self.cert))
def _auto_config(self):
if self.ubconf and os.access(self.ubconf, os.R_OK):
self.debug('Unbound config: {0}'.format(self.ubconf))
conf = YamlOrderedLoader.load_config_from_file(self.ubconf)[0]
if self.ext is None:
if 'extended-statistics' in conf['server']:
self.ext = conf['server']['extended-statistics']
if 'remote-control' in conf:
if conf['remote-control'].get('control-use-cert', False):
self.key = self.key or conf['remote-control'].get('control-key-file')
self.cert = self.cert or conf['remote-control'].get('control-cert-file')
self.port = self.port or conf['remote-control'].get('control-port')
else:
self.unix_socket = self.unix_socket or conf['remote-control'].get('control-interface')
else:
self.debug('Unbound configuration not found.')
if not self.key:
self.key = '/etc/unbound/unbound_control.key'
if not self.cert:
self.cert = '/etc/unbound/unbound_control.pem'
if not self.port:
self.port = 8953
def _generate_perthread_charts(self):
tmporder = list()
for thread in range(0, self.threads):
charts, order, statmap = _get_perthread_info(thread)
tmporder.extend(order)
self.definitions.update(charts)
self.statmap.update(statmap)
self.order.extend(sorted(tmporder))
def check(self):
# Check if authentication is working.
self._connect()
result = bool(self._sock)
self._disconnect()
# If auth works, and we need per-thread charts, query the server
# to see how many threads it's using. This somewhat abuses the
# SocketService API to get the data we need.
if result and self.perthread:
tmp = self.request
if sys.version_info[0] < 3:
self.request = 'UBCT1 status\n'
else:
self.request = b'UBCT1 status\n'
raw = self._get_raw_data()
for line in raw.splitlines():
if line.startswith('threads'):
self.threads = int(line.split()[1])
self._generate_perthread_charts()
break
if self.threads is None:
self.info('Unable to auto-detect thread counts, disabling per-thread stats.')
self.perthread = False
self.request = tmp
return result
@staticmethod
def _check_raw_data(data):
# The server will close the connection when it's done sending
# data, so just keep looping until that happens.
return False
def _get_data(self):
raw = self._get_raw_data()
data = dict()
tmp = dict()
for line in raw.splitlines():
stat = line.split('=')
tmp[stat[0]] = stat[1]
for item in self.statmap:
if item in tmp:
data[self.statmap[item][0]] = float(tmp[item]) * self.statmap[item][1]
return data
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