#!/usr/bin/phthonimport osimport timeimport commandsimport shutilimport threadingfrom os.path import join, getsizeimport 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, port, zip, dir)th = threading.Thread(target = mydumper, args =(strcmd, dir, businessName, host, port, is_errRetryBackup, int(isMaster)))thread_pool.append(th)if (thread_pool):for t in thread_pool:t.daemon = Truet.start()for t in thread_pool:t.join()def mydumper(sCmd, backupDir, businessName, host, port, 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 = 123456else:# 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 = backupDirif (returncode != 0):# 异常备份标记为: 日期 + _ERRerrDir = 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, master_host, backup_host, name, port, 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(), name, host, port, False, isMaster)def getDirsize(path):# 获取备份文件夹大小size = 0Lfor root, dirs, files in os.walk(path):size += sum([getsize(join(root, name)) for name in files])return (size)def statement(path, backup_host, 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 slavenum = 3sFinds = "SLAVE STATUS"else:num = 2sFinds = "MASTER STATUS"f = open(path, ‘r’)rows = f.readlines(); i = 100; lst =[]for s in rows:if (s.find(sFinds) > 0):i = 1; continueif (i <= num):lst.append(s.split(‘:’)[1].strip())i += 1if (isMaster == 1):# 备机是 mastermaster_host = backup_hostlog_file, log_pos = lst;else:# 备机是 slavemaster_host, log_file, log_pos = lst;er_code = 0er_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_file, log_pos )return (er_code, er_info, master_host, 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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