#!/usr/bin/env python3 # -*- coding: utf-8 -*- import json import logging import time import signal import yaml import requests import subprocess import argparse import threading import socketserver import sys from http.server import BaseHTTPRequestHandler from threading import Event from datetime import datetime from concurrent.futures import ThreadPoolExecutor from threading import Lock xprint_lock = Lock() def xprint(*args, **kwargs): """Thread safe print function""" with xprint_lock: print(*args, **kwargs) sys.stdout.flush() parser = argparse.ArgumentParser(description='Sensors polling and metrics recording.') parser.add_argument("-v", "--verbosity", help="Increase output verbosity", type=str, choices=['DEBUG', 'INFO', 'WARNING'], default='INFO') args = parser.parse_args() verbosity = args.verbosity logger = logging.getLogger('sensors-polling') if verbosity == 'DEBUG': logger.setLevel(logging.DEBUG) elif verbosity == 'INFO': logger.setLevel(logging.INFO) elif verbosity == 'WARNING': logger.setLevel(logging.WARNING) # create console handler ch = logging.StreamHandler() # create formatter formatter = logging.Formatter('[%(levelname)s] %(name)s: [%(threadName)s] %(message)s') # add formatter to ch ch.setFormatter(formatter) # add ch to logger logger.addHandler(ch) logger.info("====== Starting ======") stop = Event() last_data = {} def handler(signum, frame): global stop logger.info("Got interrupt: "+str(signum)) stop.set() logger.info("Shutdown") signal.signal(signal.SIGTERM,handler) signal.signal(signal.SIGINT,handler) with open('./conf.yml') as conf: yaml_conf = yaml.safe_load(conf) polling_conf = yaml_conf.get("polling_conf") http_port = yaml_conf.get("http_port") default_polling_interval = yaml_conf.get("default_polling_interval") default_recording_interval = yaml_conf.get("default_recording_interval") max_threads = len(polling_conf) recording_api_key = yaml_conf.get("recording_api_key") post_url = yaml_conf.get("post_url") def sensors_polling(poller_conf): global stop global last_data s = requests.Session() start_time=time.time() last_polling_time=None last_recording_time=None if 'polling_interval' in poller_conf.keys(): polling_interval = poller_conf['polling_interval'] else: polling_interval = default_polling_interval if 'recording_interval' in poller_conf.keys(): recording_interval = poller_conf['recording_interval'] else: recording_interval = default_recording_interval while True: if stop.is_set(): logger.info('Stopping thread '+poller_conf['name']) break logger.debug('New while loop for '+poller_conf['name']) utc_now = datetime.utcnow() now = datetime.now() current_time=time.time() logger.debug('current_time: '+str(current_time)) # Polling try: logger.debug('Getting data for '+poller_conf['name']) command = [poller_conf['executable']] + poller_conf['arguments'] returned_output = subprocess.check_output(command) data = json.loads(returned_output.decode("utf-8")) logger.debug('Got: '+returned_output.decode("utf-8")) for metric in poller_conf['metrics']: last_data[metric['name']] = {'value': data[metric['name']], 'timestamp': utc_now.isoformat()} last_polling_time=time.time() logger.debug('last_polling_time: '+str(last_polling_time)) except Exception as e: logger.error(e) if last_polling_time is None: polling_missed = int((current_time - start_time) // polling_interval) else: polling_missed = int((current_time - last_polling_time) // polling_interval) if polling_missed > 0: logger.warning("Missed "+str(polling_missed)+" polling iteration(s)") # Recording if last_polling_time is not None: if last_recording_time is not None: recording_interval_elapsed = (current_time - last_recording_time > recording_interval) polling_recent_enough = (last_polling_time > last_recording_time + recording_interval/2) logger.debug('recording_interval_elapsed: '+str(recording_interval_elapsed)) logger.debug('polling_recent_enough: '+str(polling_recent_enough)) if last_recording_time is None or (recording_interval_elapsed and polling_recent_enough): try: for metric in poller_conf['metrics']: logger.debug('Posting data for '+metric['name']) #r = s.post(post_url[metric['type']], # headers={'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0', # 'X-API-KEY': recording_api_key}, # json={'metric': metric['name'], # 'value': last_data[metric['name']]['value'], # 'time': utc_now.isoformat()}) #if r.status_code != 201: # logger.error(str(r.status_code)+" "+r.reason) # It has to be current_time variable so the interval check works correctly last_recording_time=current_time logger.debug('last_recording_time: '+str(last_recording_time)) except Exception as e: logger.error(e) if last_recording_time is None: recording_missed = int((current_time - start_time) // recording_interval) else: recording_missed = int((current_time - last_recording_time) // recording_interval) if recording_missed > 0: logger.warning("Missed "+str(recording_missed)+" recording iteration(s)") # Sleeping time_to_sleep = polling_interval - ((current_time - start_time) % polling_interval) logger.debug('Sleeping '+str(time_to_sleep)+' seconds for '+poller_conf['name']) stop.wait(timeout=time_to_sleep) def metric_list(): metrics = [] for poller_conf in polling_conf: for metric in poller_conf['metrics']: metrics.append(metric['name']) return metrics class MyHandler(BaseHTTPRequestHandler): def do_GET(self): if self.path == '/': self.send_response(200) self.send_header('Content-type', 'text/plain') self.end_headers() self.wfile.write(bytes(str(metric_list())+'\n', 'utf-8')) if self.path[1:] in metric_list(): self.send_response(200) self.send_header('Content-type', 'text/plain') self.end_headers() self.wfile.write(bytes(json.dumps(last_data[self.path[1:]])+'\n', 'utf-8')) else: self.send_response(404) # This rewrites the BaseHTTP logging function def log_message(self, format, *args): if verbosity == 'INFO': xprint("%s - - [%s] %s" % (self.address_string(), self.log_date_time_string(), format%args)) class WebThread(threading.Thread): def run(self): httpd.serve_forever() httpd = socketserver.TCPServer(("", http_port), MyHandler, bind_and_activate=False) httpd.allow_reuse_address = True httpd.server_bind() httpd.server_activate() webserver_thread = WebThread() webserver_thread.start() executor = ThreadPoolExecutor(max_workers=max_threads) threads = [] for poller_conf in polling_conf: threads.append(executor.submit(sensors_polling, poller_conf)) logger.info("Polling "+str(metric_list())) while True: if stop.is_set(): executor.shutdown(wait=True) httpd.shutdown() httpd.server_close() break for thread in threads: if not thread.running(): try: res = thread.exception(timeout=1) if res is not None: logger.error(res) except Exception as e: logger.error(e) stop.wait(timeout=0.5) logger.info("====== Ended successfully ======") # vim: set ts=4 sw=4 sts=4 et :