143 lines
3.8 KiB
Python
Executable File
143 lines
3.8 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (C) 2015 Hewlett-Packard Development Company, L.P.
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# Copyright (C) 2021 Acme Gating, LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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#
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import re
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import socket
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import time
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from statsd.defaults.env import statsd
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INTERVAL = 10
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GAUGES = [
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'zk_avg_latency',
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'zk_min_latency',
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'zk_max_latency',
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'zk_outstanding_requests',
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'zk_znode_count',
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'zk_followers',
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'zk_synced_followers',
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'zk_pending_syncs',
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'zk_watch_count',
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'zk_ephemerals_count',
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'zk_approximate_data_size',
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'zk_open_file_descriptor_count',
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'zk_max_file_descriptor_count',
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]
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COUNTERS = [
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'zk_packets_received',
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'zk_packets_sent',
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]
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class Socket:
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def __init__(self, host, port):
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self.host = host
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self.port = port
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self.socket = None
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def open(self):
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.settimeout(5)
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s.connect((self.host, self.port))
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self.socket = s
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def __enter__(self):
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self.open()
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return self.socket
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def __exit__(self, etype, value, tb):
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self.socket.close()
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self.socket = None
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class ZooKeeperStats:
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def __init__(self, host, port=2181):
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self.socket = Socket(host, port)
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# The hostname to use when reporting stats (e.g., zk01)
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if host in ('localhost', '127.0.0.1', '::1'):
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self.hostname = socket.gethostname()
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else:
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self.hostname = host
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self.log = logging.getLogger("ZooKeeperStats")
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self.prevdata = {}
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def command(self, command):
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with self.socket as socket:
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socket.send((command + '\n').encode('utf8'))
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data = ''
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while True:
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r = socket.recv(4096)
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data += r.decode('utf8')
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if not r:
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break
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return data
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def getStats(self):
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data = self.command('mntr')
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lines = data.split('\n')
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ret = []
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for line in lines:
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if not line:
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continue
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if '\t' not in line:
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continue
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key, value = line.split('\t')
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ret.append((key, value))
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return dict(ret)
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def reportStats(self, stats):
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pipe = statsd.pipeline()
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base = 'zk.%s.' % (self.hostname,)
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for key in GAUGES:
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try:
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value = int(stats.get(key, 0))
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pipe.gauge(base + key, value)
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except Exception:
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self.log.exception("Unable to process %s", key)
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for key in COUNTERS:
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try:
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newvalue = int(stats.get(key, 0))
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oldvalue = self.prevdata.get(key)
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if oldvalue is not None:
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value = newvalue - oldvalue
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pipe.incr(base + key, value)
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self.prevdata[key] = newvalue
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except Exception:
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self.log.exception("Unable to process %s", key)
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pipe.send()
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def run(self):
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while True:
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try:
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self._run()
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except Exception:
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self.log.exception("Exception in main loop:")
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def _run(self):
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time.sleep(INTERVAL)
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stats = self.getStats()
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self.reportStats(stats)
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logging.basicConfig(level=logging.DEBUG)
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p = ZooKeeperStats('localhost')
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p.run()
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