python自动化脚本之备份mysql数据库

综合别人的python实现备份mysql的自动化脚本，centos7下用python3实现的脚本（python2的只需要修改下print的位置即可）

亲测可执行，且服务器可以定义为其他服务器，未对数据库名是否正确做判断和处理（测试了仅仅输出的备份文件里没什么有效信息而已，不影响）

脚本如下：

 

#!/usr/bin env python3
import os
import time
import datetime
#定义服务器，用户名、密码、数据库名称（多个库分行放置）和备份的路径
DB_HOST = 'localhost'
DB_USER = 'root'
DB_USER_PASSWD = 'mypassword'
DB_NAME = '/mnt/dbbackup/dbnames.txt'
BACKUP_PATH = '/mnt/dbbackup/mysql/'

DATETIME = time.strftime('%Y%m%d-%H%M%S')
TODAYBACKUPPATH = BACKUP_PATH + DATETIME

print("createing backup folder!")
#创建备份文件夹
if not os.path.exists(TODAYBACKUPPATH):
        os.makedirs(TODAYBACKUPPATH)

print("checking for databases names file")


#定义执行备份脚本，读取文件中的数据库名称，注意按行读写，不校验是否存在该库
def run_backup():
        in_file = open(DB_NAME,"r")
        for dbname in in_file.readlines():
                dbname = dbname.strip()
                print("now starting backup database %s" %dbname)
                dumpcmd = "mysqldump -u" +DB_USER + " -p"+DB_USER_PASSWD+" " +dbname+" > "+TODAYBACKUPPATH +"/"+dbname+".sql"
                print(dumpcmd)
                os.system(dumpcmd)
        file1.close()
#执行压缩的函数
def run_tar():
        compress_file = TODAYBACKUPPATH + ".tar.gz"
        compress_cmd = "tar -czvf " +compress_file+" "+DATETIME
        os.chdir(BACKUP_PATH)
        os.system("pwd")
        os.system(compress_cmd)
        print("compress complete!")
        #删除备份文件夹
        remove_cmd = "rm -rf "+TODAYBACKUPPATH
        os.system(remove_cmd)

#备份数据库文件存在就执行备份和压缩，否则退出
if os.path.exists(DB_NAME):
        file1 = open(DB_NAME)
        print("starting backup of all db listed in file "+DB_NAME)
        run_backup()
        run_tar()
        print("backup success!")
else:
        print("database file not found..")
        exit()