Backup, zip, FTP upload, rotate script for Minecraft server

minecraft_backup.py

#!/usr/bin/python3
from ftplib import FTP
import glob
from os import system, path, remove
from os.path import join
from datetime import datetime
import logging
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s %(levelname)s %(message)s')


def perform_backup():
    current_time = datetime.now().strftime('%Y-%m-%dT%H-%M-%S')
    backup_name = f'server-{current_time}'
    temp_backup_dir = f'/opt/minecraft/server_backups/server-{current_time}'
    system(f'mkdir -p /opt/minecraft/server_backups')
    target_zip_file = f'/opt/minecraft/server_backups/server-{current_time}.tar.gz'
    logging.info(f'Starting Minecraft backup process {current_time}.')

    # Copy dir to operate on
    logging.info('Copying server files')
    system(f'cp -r /opt/minecraft/server {temp_backup_dir}')

    # Archive/compress
    logging.info('Archiving and compressing.')
    system(f'tar czf {target_zip_file} {temp_backup_dir}')

    # Delete temp dir
    logging.info('Cleaning up')
    system(f'rm -rf {temp_backup_dir}')

    logging.info('Backup completed.')
    return backup_name + '.tar.gz'


def rotate_backups():
    """Delete old backups so it doesn't fill disk space"""
    MAX_BACKUPS = 30
    files = glob.glob("/opt/minecraft/server_backups/*.tar.gz")
    # Oldest files are at the front. Newest files at the end
    files.sort(key=path.getmtime)
    logging.info(f'Found {len(files)} files: {files}')
    #print(f'Oldest 2 files: {files[:2]}')
    #print(f'Newest 2 files: {files[-2:]}')
    backup_overflow_count = len(files) - MAX_BACKUPS
    logging.info(f'Found {backup_overflow_count} too many backups')
    if backup_overflow_count > 0:
        for f in files[0:backup_overflow_count]:
            logging.info(f'Will remove: {f}')
            remove(f)


def upload_over_ftp(file_to_upload): 
    logging.info(f'Uploading {file_to_upload} over FTP')
    with FTP('host', 'user', 'pass') as ftp:
        with open(join('/opt/minecraft/server_backups/', file_to_upload), 'rb') as f:
            ftp.storbinary(f'STOR minecraft-backups/{file_to_upload}', f)
    logging.info('Done uploading over FTP')


def main():
    new_backup_file = perform_backup()
    rotate_backups()
    upload_over_ftp(new_backup_file)


main()