154 lines
4.8 KiB
Python
Executable File
154 lines
4.8 KiB
Python
Executable File
#!/usr/bin/env python3
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from threading import Thread
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from time import time, sleep
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import traceback
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import logging
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import json
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import sys
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import os
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from pymonitor.elasticsearch import ESBackend
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from pymonitor.influxdb import InfluxBackend
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class MonitorDaemon(Thread):
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def __init__(self, config):
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Thread.__init__(self)
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self.config = config
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self.threads = []
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self.backend = {"elasticsearch": ESBackend,
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"influxdb": InfluxBackend}[self.config["backend"]["type"]](self, self.config["backend"])
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def run(self):
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"""
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Start all monitoring threads and block until they exit
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"""
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logger = logging.getLogger("monitordaemon")
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checkerPath = os.path.dirname(os.path.realpath(__file__)) + "/monitors/"
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sys.path.append(checkerPath)
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logger.debug("path %s" % checkerPath)
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# Create all monitoring threads
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logger.debug("creating monitor threads")
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for instance in self.config["monitors"]:
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monitor_thread = MonitorThread(instance, self.backend)
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self.threads.append(monitor_thread)
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# Setup backend
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self.backend.connect()
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logger.debug("starting monitor threads")
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for monitor_thread in self.threads:
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monitor_thread.start()
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# Tear down all threads
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logger.debug("joining monitor threads")
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for monitor_thread in self.threads:
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monitor_thread.join()
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logger.debug("joined monitor threads")
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def shutdown(self):
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"""
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Signal all monitoring threads to stop
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"""
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for monitor_thread in self.threads:
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monitor_thread.shutdown()
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class MonitorThread(Thread):
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def __init__(self, config, backend):
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"""
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Load checker function and prepare scheduler
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"""
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Thread.__init__(self)
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self.config = config
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self.backend = backend
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self.logger = logging.getLogger("monitordaemon.monitorthread.%s" % self.config["type"])
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self.logger.debug("initing worker thread with config %s" % self.config)
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self.logger.debug("importing %s" % self.config["type"])
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self.imported = __import__(self.config["type"])
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self.checker_func = getattr(self.imported, self.config["type"])
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self.logger.debug("checker func %s" % self.checker_func)
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self.alive = True
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self.delay = int(self.config["freq"])
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self.lastRun = 0
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def run(self):
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"""
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Call execute method every x seconds forever
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"""
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self.logger.debug("starting scheduler")
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while self.alive:
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if time() - self.lastRun > self.delay:
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self.lastRun = time()
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try:
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self.execute(self.config["args"])
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except:
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tb = traceback.format_exc()
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self.logger.warning(tb)
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sleep(0.5)
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self.logger.debug("scheduler exited")
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def execute(self, args):
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"""
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Run the loaded checker function. Pass each Metric object yielded to the backend.
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"""
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before = time()
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for result in self.checker_func(**args):
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result.tags.update(type=self.config["type"])
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self.logger.debug("result: %s" % (result,))
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self.backend.add_data(result)
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duration = time() - before
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self.logger.info("runtime: %.3f" % duration)
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def shutdown(self):
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"""
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Tell thread to exit
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"""
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self.logger.debug("canceling scheduler")
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self.alive = False
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def main():
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from optparse import OptionParser
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parser = OptionParser()
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parser.add_option("-c", "--config", action="store", type="string", dest="config", help="Path to config file")
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parser.add_option("-l", "--logging", action="store", dest="logging", help="Logging level", default="INFO",
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choices=['CRITICAL', 'ERROR', 'WARNING', 'INFO', 'DEBUG'])
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(options, args) = parser.parse_args()
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logging.basicConfig(level=getattr(logging, options.logging),
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format="%(asctime)-15s %(levelname)-8s %(name)s@%(filename)s:%(lineno)d %(message)s")
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logger = logging.getLogger("init")
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logger.debug("options: %s" % options)
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if options.config is None:
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parser.print_help()
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sys.exit()
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with open(options.config, "r") as c:
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if options.config.endswith('.json'):
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conf = json.load(c)
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elif options.config.endswith('.yml'):
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from yaml import load as yaml_load
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conf = yaml_load(c)
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else:
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raise Exception("Invalid config format")
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logger.debug("starting daemon with conf: %s" % conf)
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daemon = MonitorDaemon(conf)
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try:
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daemon.start()
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daemon.join()
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except KeyboardInterrupt:
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print("")
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daemon.shutdown()
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