wulianwang00 2015-02-07
需求描述:
每天晚上23点,对数据库进行一次完整备份。第二天0-22点,每小时进行一次增量备份。每次备份前把上次的完整备份和23次增量备份移动到指定目录里,保留7天的数据。
ps:不要问我,为什么是23点执行完整备份,0点不更好处理吗?bingo,这是我们的业务需求,呵呵,不能说太细,你懂得。不要问我,为啥用不用shell,至少不用写subprocess.call来调系统命令。我只能说,我乐意,你管的着?哈哈!
#-*- coding: UTF-8 -*- 
#!/usr/bin/Python 
#==================================================== 
# Author: gaochenchao - EMail:[email protected] 
# Last modified: 2015-2-5 
# Filename: innobackup.py 
# Description: backup mysql files,base percona xtrabackup 
# blog:gccmx.blog.51cto.com 
#==================================================== 
import datetime 
import subprocess 
import os 
import sys 
import logging 
logging.basicConfig(level=logging.DEBUG, 
                format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s', 
                datefmt='%a, %d %b %Y %H:%M:%S', 
                filename='backup.log', 
                filemode='a') 
backuser = 'bkuser'
backpass = 'bk2015'
basedir = '/mnt/backups'
tomorrowdate = datetime.date.fromordinal(datetime.date.today().toordinal()+1).strftime("%y%m%d") 
todaydate = datetime.datetime.now().strftime("%y%m%d") 
fullback_dir = "%s/%s" %(basedir,tomorrowdate) 
cuhour = datetime.datetime.now().strftime("%H") 
#cuhour = sys.argv[1] 
increment_dir = '%s/%s' %(basedir,cuhour) 
increbase_dir='' 
stores = '/mnt/stores'
  
#转储老的备份数据,移动到以当前年月日命名的文件夹内,目录如150209-bak 
def storebefore(): 
    suffix = datetime.datetime.now().strftime("%y%m%d") 
    storedir = "%s/%s-bak" %(stores,suffix) 
    if not os.path.exists(storedir): 
        subprocess.call("mkdir -p %s" %(storedir),shell=True) 
    command = "cd %s && mv * %s" %(basedir,storedir) 
    subprocess.call(command,shell=True) 
      
# 删除转储目录中超过7天的备份数据 
def cleanstore(): 
    command = "find %s -type d -mtime +7 |xargs rm -fr" % stores 
    subprocess.call(command,shell=True) 
  
# 备份方法,每天23点完整备份,第二天0-22点增量备份 
def backup(): 
    if not os.path.exists(basedir): 
        subprocess.call("mkdir -p %s"%basedir,shell=True) 
    commandfull = "innobackupex --user=%s --password=%s --no-timestamp %s" %(backuser,backpass,fullback_dir) 
    if cuhour == '23': 
        storebefore() 
        subprocess.call("rm -fr %s/*"%basedir,shell=True) 
        subprocess.call(commandfull,shell=True) 
        logging.info(commandfull) 
    else: 
        if int(cuhour) - 1 >= 0: 
            increbase_dir = '%s/%s' %(basedir,str(int(cuhour) - 1)) 
        else: 
            increbase_dir = "%s/%s" %(basedir,todaydate) 
        if not os.path.exists(increbase_dir): 
            logging.info('上次的增量备份目录 [%s] 不存在,终止执行'%increbase_dir) 
            exit(0) 
        commandincre = "innobackupex --user=%s --password=%s --no-timestamp --incremental %s --incremental-basedir=%s" %( 
                        backuser,backpass,increment_dir,increbase_dir) 
        subprocess.call(commandincre,shell=True) 
        logging.info(commandincre) 
          
if __name__ == '__main__': 
    backup() 
    cleanstore()
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