利用MySQL备份工具mydumper备份代码

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    #!/usr/bin/phthon  
      
      
    import os  
    import time  
    import commands  
    import shutil  
    import threading  
    from os.path import join,getsize  
    import MySQLdb as mydb  
      
      
    # 备份目录  
    baseDir = "/data2/backup/backup_data/"  
      
      
    # ns 或 wx;  备份后是否要压缩(mydumper 自带压缩功能)，要压缩 True，否则 False.  
    idc = 'ns'; isZip = True  
      
      
    # 备份失败是否重试 ，True 则重试,不重试 设 False,retry_sleep 多久后才开始重试(秒)  
    is_errRetryBackup = True; retry_sleep = 300  
      
      
    # 备份日期  
    backup_date = time.strftime("%Y%m%d")  
      
      
    # 备份命令  
    cmd  = "/usr/local/bin/mydumper -h %s -u root -p password? -P %s %s -t 5 -o %s"  
      
      
    ''''' 
    功能描述： 
      1. mydumper 远程批量备份,备份列表由配置文件提供 
      2. 可按要求对备份是否压缩(mydumper 自动压缩) 
      3. 备份失败允许再尝试备份一次 
      4. 备份信息写入数据库 
    '''  
    def main():  
        thread_pool = []  
      
      
        # 是否启用压缩  
        zip = '-c' if isZip == True else ''  
      
      
        # 从配置文件读取 ip,名称,端口,并拼凑备份语句  
        #f = open('/data2/backup/cnf/other_list.cnf','r')  
        f = open('/data/other_list.cnf','r')  
        for lines in f.readlines():  
            if (not lines.startswith('#') and len(lines.strip()) > 0):  
                str = lines.split()  
                host,businessName,port,isMaster = str[0],str[1],str[2],str[3]  
                # 业务文件夹不存在则创建  
                dir = baseDir + '/' + businessName;  
                if (not os.path.exists(dir)):  
                     os.makedirs(dir)  
      
      
                dir += "/%s%s" % (businessName,backup_date)  
                # 业务目录: dir,备份目录: dir/name+备份日期  
                strcmd  = cmd % (host,zip,dir)  
      
      
                th = threading.Thread(target = mydumper,args =(strcmd,dir,host,is_errRetryBackup,int(isMaster)))  
                thread_pool.append(th)  
      
      
        if (thread_pool):  
            for t in thread_pool:  
                t.daemon = True  
                t.start()  
            for t in thread_pool:  
                t.join()  
      
      
    def mydumper(sCmd,backupDir,is_Retry,isMaster):  
        master_host = ""; backup_host = host; name = businessName; port = port; backup_type = 1; file = "";  
        start_time = ""; stop_time = ""; returncode = 0; file_size = 0; slave_statement = ""; std_err = "";  
      
      
        start_time = time.strftime("%Y%m%d%H%M%S")  
      
      
        # 清除可能遗留的备份  
        if (os.path.exists(backupDir)):  
            shutil.rmtree(backupDir)  
      
      
        # 执行备份  
        returncode,std_err = execute(sCmd)  
      
      
        stop_time = time.strftime("%Y%m%d%H%M%S")  
      
      
        if (returncode == 0):  
            # 备份 std_err 返回不为空也视为出错。  
            if (std_err.strip() != ""):  
                returncode = 123456  
            else:  
                # 获取 change master to 信息，再次校验备份是否有效  
                returncode,std_err,master_host,slave_statement = statement(backupDir,backup_host,isMaster)  
      
      
                if (returncode == 0):  
                    file = backupDir  
      
      
        if (returncode != 0):  
            # 异常备份标记为: 日期 + _ERR  
            errDir = backupDir + "_ERR"  
            os.rename(backupDir,errDir)  
            file = errDir  
      
      
        # 获取备份大小  
        file_size = getDirsize(file)  
      
      
        if (len(std_err) > 255):  
            std_err = std_err[:250] + "..."  
      
      
        my_args  = [idc,name,backup_type,file,start_time,stop_time,returncode,file_size,slave_statement,std_err]  
      
      
        # 写入数据库  
        call_proc(my_args)  
      
      
        # 备份失败是否需要重备? 重备允许一次.  
        if (is_Retry == True and returncode != 0):  
            time.sleep(retry_sleep)  
      
      
            oldfile = sCmd.split('-o')[1]  
            pos = oldfile.rfind("/") + 1  
      
      
            # 获取备份全路径,备份文件标记为重备 字样  
            retry_file = oldfile[:pos] + "ReBackup-" + oldfile[pos:]  
      
      
            retryCmd = sCmd.replace(oldfile,retry_file)  
      
      
            # 重备开始  
            mydumper(retryCmd,retry_file.strip(),False,isMaster)  
      
      
    def getDirsize(path):  
        # 获取备份文件夹大小  
        size = 0L  
        for root,dirs,files in os.walk(path):  
            size += sum([getsize(join(root,name)) for name in files])  
        return (size)  
      
      
    def statement(path,isMaster):  
        ''''' 
        功能: 从 metadata 读取change master to 信息 
        1. 备份过程: 会先生成: metadata.partial,完成后metadata.partial会重名为: metadata 并写入备份完成时间 
        2. metadata 分3段: 
           (1) Started dump: 备份开始时间. 
           (2) master 的log-file 和 log-pos 信息 (必有); slave 的host、log-file 和 log-pos 信息 （备机是slave 才有) 
           (3) Finished dump: 备份结束时间 
        3. 返回错码,master_host 和 change master to 信息 
        '''  
        path += "/metadata"; sMetadata = ""; master_host = ""; er_code = 654321; er_info = "%s not exists !!!" % (path)  
      
      
        if (os.path.exists(path)):  
            if (isMaster != 1):  
                # 备机是 slave  
                num = 3  
                sFinds = "SLAVE STATUS"  
            else:  
                num = 2  
                sFinds = "MASTER STATUS"  
      
      
            f = open(path,'r')  
            rows = f.readlines(); i = 100; lst =[]  
            for s in rows:  
                if (s.find(sFinds) > 0):  
                    i = 1; continue  
      
      
                if (i <= num):  
                    lst.append(s.split(':')[1].strip())  
                    i += 1  
      
      
            if (isMaster == 1):  
                # 备机是 master  
                master_host = backup_host  
                log_file,log_pos = lst;  
            else:  
                # 备机是 slave  
                master_host,log_file,log_pos = lst;  
      
      
            er_code = 0  
            er_info = ""  
            sMetadata = "CHANGE MASTER TO MASTER_HOST='%s',MASTER_LOG_FILE='%s',MASTER_LOG_POS=%s,MASTER_USER='rep_user',MASTER_PASSWORD='meizu.com'" % (master_host,log_pos )  
      
      
        return (er_code,er_info,sMetadata)  
      
      
    def execute(cmd):  
        ''''' 
        1.执行 shell 命令 
        2.返回执行信息 (returncode = 0 则执行成功,std_err 为报错的错误信息) 
        '''  
        try:  
            returncode,std_err = commands.getstatusoutput(cmd)  
            return (returncode,std_err)  
        except os.error,e:  
            # 异常返回 1001 错误  
            return (1001,e)  
      
      
    def call_proc(my_args):  
        # 备份信息写入数据库  
        try:  
            conn = mydb.connect(host = '127.0.0.1',user = 'test',passwd = 'zxc/213?',db = 'meizu_item')  
            cur  = conn.cursor()  
      
      
            cur.callproc('sp_backup_i',[my_args[0],my_args[1],my_args[2],my_args[3],my_args[4],my_args[5],my_args[6],my_args[7],my_args[8],my_args[9],my_args[10],my_args[11],my_args[12]])  
            conn.commit()  
        except mydb.Error,e:  
            pass  
            # print "Mysql Error %d: %s" % (e.args[0],e.args[1])  
        finally:  
            cur.close(); conn.close()  
      
      
    if __name__ == '__main__':  
        main()  

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