Python实现日志备份守护进程的示例

# 确保已安装 Python3 和 pip
sudo apt install python3 python3-pip   # Ubuntu
sudo yum install python3 python3-pip   # CentOS

import os
import time
import logging
from datetime import datetime
import subprocess

# 配置日志
logging.basicConfig(
    filename='/var/log/backup_daemon.log',
    level=logging.INFO,
    format='%(asctime)s - %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S'
)

def backup_logs():
    log_dir = '/var/log/app'
    backup_dir = '/backup/logs'

    # 遍历日志目录
    for root, _, files in os.walk(log_dir):
        for file in files:
            src_path = os.path.join(root, file)
            dest_path = os.path.join(backup_dir, f"{file}.tar.gz")

            # 检查是否已备份
            if not os.path.exists(dest_path):
                logging.info(f"Backing up {file}...")
                # 使用 tar 压缩
                try:
                    subprocess.run(
                        ['tar', '-czf', dest_path, src_path],
                        check=True,
                        stdout=subprocess.DEVNULL,
                        stderr=subprocess.DEVNULL
                    )
                except subprocess.CalledProcessError as e:
                    logging.error(f"Failed to backup {file}: {e}")

if __name__ == "__main__":
    logging.info("Daemon started.")
    while True:
        backup_logs()
        time.sleep(300)  # 5分钟执行一次

sudo vim /etc/systemd/system/backup_daemon.service

[Unit]
Description=Python Log Backup Daemon
After=network.target

[Service]
Type=simple
ExecStart=/usr/bin/python3 /path/to/backup_daemon.py  # 修改为实际脚本路径
Restart=on-failure
RestartSec=5s
User=root
WorkingDirectory=/  # 可选：设置工作目录

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl start backup_daemon
sudo systemctl enable backup_daemon

sudo touch /var/log/app/test.log

ls /backup/logs  # 5分钟后应生成 test.log.tar.gz

tail -f /var/log/backup_daemon.log

systemctl status backup_daemon

sudo systemctl stop backup_daemon

journalctl -u backup_daemon -f  # 实时跟踪日志