217 lines
6.9 KiB
Python
Executable File
217 lines
6.9 KiB
Python
Executable File
#!/usr/bin/env python3
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from threading import Thread
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from elasticsearch import Elasticsearch
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from time import time,sleep
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from pymonitor.builtins import sysinfo
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import datetime
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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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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 = Backend(self.config["backend"]["url"])
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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.info("path %s" % checkerPath)
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# Create/start all monitoring threads
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logger.info("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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self.backend.mapping.update(monitor_thread.mapping)
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self.backend.connect()
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logger.info("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.info("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.info("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 Backend:
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def __init__(self, es_url):
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"""
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Init elasticsearch client
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"""
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self.es_url = es_url
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self.mapping = {}
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self.logger = logging.getLogger("monitordaemon.backend")
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self.sysinfo = {}
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self.update_sys_info()
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logger.info("running on %(hostname)s (%(ipaddr)s)" % self.sysinfo)
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def connect(self):
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self.logger.info("final mapping %s" % self.mapping)
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self.logger.info("connecting to backend at %s" % self.es_url)
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self.es = Elasticsearch([self.es_url])
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self.logger.info("connected to backend")
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self.current_index = ""
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self.check_before_entry()
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def update_sys_info(self):
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"""
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Fetch generic system info that is sent with every piece of monitoring data
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"""
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self.sysinfo["hostname"] = sysinfo.hostname()
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self.sysinfo["ipaddr"] = sysinfo.ipaddr()
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def get_index_name(self):
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"""
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Return name of current index such as 'monitor-2015.12.05'
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"""
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return "monitor-%s" % datetime.datetime.now().strftime("%Y.%m.%d")
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def create_index(self, indexName):
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"""
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Check if current index exists, and if not, create it
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"""
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if not self.es.indices.exists(index=indexName):
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mapping = {
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"mappings": {
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"_default_":{
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"properties": {
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"ipaddr": {
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"type": "ip"
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}
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}
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}
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}
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}
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mapping["mappings"].update(self.mapping)
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self.logger.info("creating index %s with mapping %s" % (indexName, json.dumps(mapping, indent=4)))
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self.es.indices.create(index=indexName, ignore=400, body=mapping)# ignore already exists error
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self.current_index = indexName
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def check_before_entry(self):
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"""
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Called before adding any data to ES. Checks if a new index should be created due to date change
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"""
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indexName = self.get_index_name()
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if indexName != self.current_index:
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self.create_index(indexName)
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def add_data(self, data_type, data):
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"""
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Submit a piece of monitoring data
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"""
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self.check_before_entry()
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doc = self.sysinfo.copy()
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doc.update(data)
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doc["@timestamp"] = datetime.datetime.utcnow().isoformat()
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self.logger.info("logging type %s: %s" % (data_type, doc))
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res = self.es.index(index=self.current_index, doc_type=data_type, body=doc)
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self.logger.info("%s created %s" % (data_type, res["_id"]))
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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.info("initing worker thread with config %s" % self.config)
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self.logger.info("importing %s" % self.config["type"])
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self.checker_func = getattr(__import__(self.config["type"]), self.config["type"])
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self.logger.info("checker func %s" % self.checker_func)
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self.mapping = {}
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#try:
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self.mapping.update(__import__(self.config["type"]).mapping)
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#except:
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# pass
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self.logger.info("mapping %s" % self.mapping)
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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.info("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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self.execute(self.config["args"])
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sleep(0.5)
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self.logger.info("scheduler exited")
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def execute(self, args):
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"""
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Run the loaded checker function
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"""
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result = self.checker_func(**args)
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self.logger.info("result: %s" % (result,))
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self.backend.add_data(self.config["type"], result)
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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.info("cancelling scheduler")
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self.alive=False
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if __name__ == '__main__':
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from optparse import OptionParser
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logging.basicConfig(level=logging.DEBUG, 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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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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(options, args) = parser.parse_args()
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logger.debug("options: %s" % options)
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if options.config == 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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conf = json.load(c)
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logger.info("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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