/
stream_monitor.py
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/
stream_monitor.py
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import argparse
import json
import logging
import os
import re
import subprocess
import sys
import threading
import time
from datetime import datetime, timedelta
from functools import partial
from http.server import BaseHTTPRequestHandler, HTTPServer
LOG_LEVEL = os.environ.get("LOGGING", "INFO").upper()
logging.basicConfig(
stream=sys.stdout,
level=LOG_LEVEL,
format="%(asctime)s %(levelname)s %(name)s %(threadName)s : %(message)s",
)
_state = {"container_active": False, "last_log_times": {}}
log_line_regex = r"(\w+):([^:]*):(.*):\b"
compiled = re.compile(log_line_regex)
class GetHandler(BaseHTTPRequestHandler):
def __init__(self, offline_diff_duration, *args, **kwargs):
self.offline_diff_duration = offline_diff_duration
super().__init__(*args, **kwargs)
def do_GET(self):
self.send_response(200)
self.send_header("Content-type", "application/json")
self.end_headers()
logging.debug("state: ")
logging.debug(_state)
online_time = datetime.now() - timedelta(seconds=self.offline_diff_duration)
response = {"active": _state["container_running"]}
cameras = {}
for k, v in _state["last_log_times"].items():
logging.debug(f"Comparing times: [{v}] and [{online_time}]")
if online_time < v:
cameras[k] = {"status": "running"}
else:
cameras[k] = {"status": "offline"}
response["cameras"] = cameras
logging.debug("response")
logging.debug(response)
self.wfile.write(json.dumps(response).encode())
self.wfile.write(b"\n")
def parse_log_line(line):
"""
:param line: Stream log line
:return: Log split into [level, camera, time]
"""
m = compiled.match(line)
if m:
groups = m.groups()
return [groups[0], groups[1], groups[2]]
def monitor_worker(container_name, check_interval, log_lines):
captures = 0
previous_log_time = None
while True:
result = subprocess.run(
["docker", "logs", "--tail", str(log_lines * 2), container_name],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
)
docker_log = result.stdout.decode("utf-8")
logging.debug(f"docker_log: {docker_log}")
if "No such container" in docker_log:
_state["container_running"] = False
time.sleep(check_interval)
continue
else:
_state["container_running"] = True
if len(docker_log) > 0:
for line in docker_log.splitlines():
log_line = parse_log_line(line)
logging.debug(f"log_line: {log_line}")
if log_line:
log_time = log_line[2]
if previous_log_time and log_time == previous_log_time:
logging.debug("No new logs detected")
else:
camera = log_line[1]
_state["last_log_times"][camera] = datetime.now()
captures += 1
previous_log_time = log_time
else:
logging.debug("Log lines empty")
time.sleep(check_interval)
logging.debug(f"Captures: {captures}")
def server_worker(host, port, offline_diff_duration):
handler = partial(GetHandler, offline_diff_duration)
server = HTTPServer((host, port), handler)
logging.info("Starting server, use <Ctrl-C> to stop")
server.serve_forever()
if __name__ == "__main__":
parser = argparse.ArgumentParser()
# Container Name
parser.add_argument(
"-c",
"--container",
type=str,
default="stream",
help="Stream Container Name or ID",
)
# Server listening HOST and PORT
parser.add_argument(
"-l", "--listen", type=str, default="localhost", help="Server listen address"
)
parser.add_argument(
"-p", "--port", type=int, default=8001, help="Server listen port"
)
# Check Interval
parser.add_argument(
"-i",
"--interval",
type=int,
default=2,
help="Interval between reading logs in seconds",
)
# Active Duration
parser.add_argument(
"-d",
"--duration",
type=int,
default=20,
help="Duration to use in considering a camera as offline in seconds",
)
# Log Lines to Process
parser.add_argument(
"-n",
"--count",
type=int,
default=1,
help="Number of cameras in config.ini",
)
args = parser.parse_args()
monitor = threading.Thread(
target=monitor_worker, args=(args.container, args.interval, args.count)
)
server = threading.Thread(
target=server_worker, args=(args.listen, args.port, args.duration)
)
monitor.start()
server.start()