利用MySQL備份工具mydumper備份代碼

    #!/usr/bin/phthon


import os  
import time  
import commands  
import shutil  
import threading  
from os.path import join, getsize  
import MySQLdb as mydb  


# 備份目錄  
baseDir = "/data2/backup/backup_data/"  


# ns 或 wx;  備份后是否要壓縮(mydumper 自帶壓縮功能)，要壓縮 True，否則 False.  
idc = 'ns'; isZip = True  


# 備份失敗是否重試 ，True 則重試,不重試 設 False, retry_sleep 多久后才開始重試(秒)  
is_errRetryBackup = True; retry_sleep = 300  


# 備份日期  
backup_date = time.strftime("%Y%m%d")  


# 備份命令  
cmd  = "/usr/local/bin/mydumper -h %s -u root -p password? -P %s %s -t 5 -o %s"  


''''' 
功能描述： 
  1. mydumper 遠程批量備份, 備份列表由配置文件提供 
  2. 可按要求對備份是否壓縮(mydumper 自動壓縮) 
  3. 備份失敗允許再嘗試備份一次 
  4. 備份信息寫入數據庫 
'''  
def main():  
    thread_pool = []  


    # 是否啟用壓縮  
    zip = '-c' if isZip == True else ''  


    # 從配置文件讀取 ip, 名稱, 端口, 并拼湊備份語句  
    #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]  
            # 業務文件夾不存在則創建  
            dir = baseDir + '/' + businessName;  
            if (not os.path.exists(dir)):  
                 os.makedirs(dir)  


            dir += "/%s%s" % (businessName, backup_date)  
            # 業務目錄: dir , 備份目錄: dir/name+備份日期  
            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 = True  
            t.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")  


    # 清除可能遺留的備份  
    if (os.path.exists(backupDir)):  
        shutil.rmtree(backupDir)  


    # 執行備份  
    returncode, std_err = execute(sCmd)  


    stop_time = time.strftime("%Y%m%d%H%M%S")  


    if (returncode == 0):  
        # 備份 std_err 返回不為空也視為出錯。  
        if (std_err.strip() != ""):  
            returncode = 123456  
        else:  
            # 獲取 change master to 信息，再次校驗備份是否有效  
            returncode, std_err, master_host, slave_statement = statement(backupDir, backup_host, isMaster)  


            if (returncode == 0):  
                file = backupDir  


    if (returncode != 0):  
        # 異常備份標記為: 日期 + _ERR  
        errDir = backupDir + "_ERR"  
        os.rename(backupDir, errDir)  
        file = errDir  


    # 獲取備份大小  
    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]  


    # 寫入數據庫  
    call_proc(my_args)  


    # 備份失敗是否需要重備? 重備允許一次.  
    if (is_Retry == True and returncode != 0):  
        time.sleep(retry_sleep)  


        oldfile = sCmd.split('-o')[1]  
        pos = oldfile.rfind("/") + 1  


        # 獲取備份全路徑, 備份文件標記為重備 字樣  
        retry_file = oldfile[:pos] + "ReBackup-" + oldfile[pos:]  


        retryCmd = sCmd.replace(oldfile,  retry_file)  


        # 重備開始  
        mydumper(retryCmd, retry_file.strip(), name, host, port, False, isMaster)  


def getDirsize(path):  
    # 獲取備份文件夾大小  
    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, backup_host, isMaster):  
    ''''' 
    功能: 從 metadata 讀取change master to 信息 
    1. 備份過程: 會先生成: metadata.partial, 完成后metadata.partial會重名為: metadata 并寫入備份完成時間 
    2. metadata 分3段: 
       (1) Started dump: 備份開始時間. 
       (2) master 的log-file 和 log-pos 信息 (必有); slave 的host、log-file 和 log-pos 信息 （備機是slave 才有) 
       (3) Finished dump: 備份結束時間 
    3. 返回錯碼, 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):  
            # 備機是 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):  
            # 備機是 master  
            master_host = backup_host  
            log_file, log_pos = lst;  
        else:  
            # 備機是 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_file, log_pos )  


    return (er_code, er_info, master_host, sMetadata)  


def execute(cmd):  
    ''''' 
    1.執行 shell 命令 
    2.返回執行信息 (returncode = 0 則執行成功, std_err 為報錯的錯誤信息) 
    '''  
    try:  
        returncode, std_err = commands.getstatusoutput(cmd)  
        return (returncode, std_err)  
    except os.error, e:  
        # 異常返回 1001 錯誤  
        return (1001, e)  


def call_proc(my_args):  
    # 備份信息寫入數據庫  
    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()  </pre>