python3-based rotating log sink

rotating_log_sync.py

#!/usr/bin/env python3

import logging
import os
import sys

from logging.handlers import RotatingFileHandler


def main(sysargs=sys.argv[:], stdin=sys.stdin):
    max_bytes = int(os.environ.get('MAX_BYTES', '10240'))
    backup_count = int(os.environ.get('BACKUP_COUNT', '2'))

    log = logging.getLogger(__name__)
    log.setLevel(logging.DEBUG)
    log.propogate = False
    handler = RotatingFileHandler(sysargs[1],
                                  mode='a+',
                                  maxBytes=max_bytes,
                                  backupCount=backup_count,
                                  encoding='utf-8')
    handler.setLevel(logging.DEBUG)
    handler.setFormatter(
        logging.Formatter('%(asctime)s:%(levelname)s: %(message)s'))
    log.addHandler(handler)

    try:
        for line in stdin:
            log.info(line.rstrip('\n'))
    except KeyboardInterrupt:
        return 0
    except Exception:
        return 1
    finally:
        handler.flush()


if __name__ == '__main__':
    sys.exit(main())