#!/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, 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, 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 = 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: 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_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()
