使用python脚本定时备份web网站

#!/usr/bin/env python
#-*- coding: utf-8 -*-

import os
import time

# 备份的指定目录
source = ['/data/www/Admin/','/data/www/tpl/']
# 备份文件存放路径
target_dir='/home/backup/web_back/'
# 备份时长
data = 5
# 备份日志
filebak_log = "/var/log/filebak.log"
# 删除备份文件日志
filerm_log = "/var/log/filerm.log"

def file_bak():
    """备份指定目录下的文件"""
    target=target_dir+time.strftime('%Y%m%d%H%M%S')+'.tar.gz'
    cmd='tar -zcPf %s %s '%(target,' '.join(source))
    if os.system(cmd)==0 :
        with open(filebak_log,'a') as filebak:
            filebak.write('successfull backup to %s 
' % target)
 
def file_rm():
    """删除备份目录下超过一定时长的文件"""
    f = list(os.listdir(target_dir))
    now_time = time.strftime('%Y%m%d%H%M%S')[0:8]
    for i in f:
        if i[15:] == 'tar.gz':
            exit_time = i[0:8]
            update_time = int(exit_time) + data
            if update_time < int(now_time):
                os.remove(target_dir+i)
                with open(filerm_log,'a') as file_log:
                    file_log.write("%s删除备份文件%s 
" % (now_time,i))

if __name__ == '__main__':
    file_bak()
    file_rm()

 # linux定时执行python文件

 # crontab -e 添加如下信息：

 # 0 4 * * * /usr/bin/python /root/bak.py >> /var/log/bak.py.log 2>&1