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#!/usr/bin/env python
# -*- coding: utf-8 -*-
try:
from urllib.request import urlopen, Request
except ImportError:
from urllib2 import urlopen, Request
import time
import plugins
import urllib2
import json
class Plugin(plugins.BasePlugin):
__name__ = 'powerdns'
def run(self, config):
'''
Experimental plugin for PowerDNS authoritative server. Might also work with PowerDNS recursor,
but it may need extra delta_keys / absolute_keys.
Add to /etc/agent360.ini:
[powerdns]
enabled=yes
statistics_url=http://localhost:8081/api/v1/servers/localhost/statistics
api_key=changeme
;ca_file=
;ca_path=
;timeout=10
'''
# Create request to configured URL
request = urllib2.Request(config.get(__name__, 'statistics_url'), headers={'X-API-Key': '%s' % config.get(__name__, 'api_key')})
# defaults
timeout = 10
results = dict()
raw_response = None
# next / previous cached metrics (for calculating deltas)
next_cache = dict()
prev_cache = self.get_agent_cache()
# use timeout from config if specified
if config.has_option(__name__, 'timeout'):
timeout = int(config.get(__name__, 'timeout'))
# create response based on configuration
if config.has_option(__name__, 'ca_file'):
raw_response = urllib2.urlopen(request, timeout=timeout, cafile=config.get(__name__, 'ca_file'))
elif config.has_option(__name__, 'ca_path'):
raw_response = urllib2.urlopen(request, timeout=timeout, capath=config.get(__name__, 'ca_path'))
else:
raw_response = urllib2.urlopen(request, timeout=timeout)
# set next_cache timestamp
next_cache['ts'] = time.time()
# parse raw response as JSON
try:
stats = json.loads(raw_response.read())
except Exception:
return False
# keys for which we should calculate the delta
delta_keys = (
'corrupt-packets',
'deferred-cache-inserts',
'deferred-cache-lookup',
'deferred-packetcache-inserts',
'deferred-packetcache-lookup',
'dnsupdate-answers',
'dnsupdate-changes',
'dnsupdate-queries',
'dnsupdate-refused',
'incoming-notifications',
'overload-drops',
'packetcache-hit',
'packetcache-miss',
'query-cache-hit',
'query-cache-miss',
'rd-queries',
'recursing-answers',
'recursing-questions',
'recursion-unanswered',
'servfail-packets',
'signatures',
'sys-msec',
'tcp-answers',
'tcp-answers-bytes',
'tcp-queries',
'tcp4-answers',
'tcp4-answers-bytes',
'tcp4-queries',
'tcp6-answers',
'tcp6-answers-bytes',
'tcp6-queries',
'timedout-packets',
'udp-answers',
'udp-answers-bytes',
'udp-do-queries',
'udp-in-errors',
'udp-noport-errors',
'udp-queries',
'udp-recvbuf-errors',
'udp-sndbuf-errors',
'udp4-answers',
'udp4-answers-bytes',
'udp4-queries',
'udp6-answers',
'udp6-answers-bytes',
'udp6-queries',
'user-msec'
)
# keys for which we should store the absolute value:
absolute_keys = (
'key-cache-size',
'latency',
'fd-usage',
'meta-cache-size',
'open-tcp-connections',
'packetcache-size',
'qsize-q',
'query-cache-size',
'real-memory-usage',
'security-status',
'signature-cache-size',
'uptime'
)
data = dict()
for stat in stats:
if 'name' in stat and 'value' in stat and 'type' in stat:
if stat['type'] == 'StatisticItem':
if stat['name'] in delta_keys:
results[stat['name']] = self.absolute_to_per_second(stat['name'], float(stat['value']), prev_cache)
data[stat['name']] = float(stat['value'])
elif stat['name'] in absolute_keys:
results[stat['name']] = float(stat['value'])
data['ts'] = time.time()
self.set_agent_cache(data)
return results
if __name__ == '__main__':
Plugin().execute()