xtrabackup的mysql备份脚本

34yhtee

一、安装xtrabackup工具
安装方法见：xtrabackup安装
二、配置备份脚本

1.拷贝mysql_backup_shell到mysql业务服务器目录，比如：/data/backup_shell/mysql_backup_shell
2.进入拷贝后mysql_backup_shell所在目录， 然后执行chmod 777 mysql_backup.sh

3.修改backup.conf
需要修改的项：
mysql_conf_file=/usr/local/meb/my.cnf.3309  #mysql cnf文件路径
user=root  #mysql连接用户名
port=3309  #端口号
host=127.0.0.1 #mysql ip
password= #密码,可以为空
socket=/data0/mysql/3309/mysql.sock #mysql socket
backup_dir=/root/workspace/mysqlbackup/  #全备份后文件存放目录
full_backup_month_day=29  #全备份在每月哪天进行， 29代表本月29号进行全备份
is_tar_full=1 #取值为0或1，为1表示会压缩全备份目录，并且删除全备份目录，而保留全备份目录压缩后tar.gz文件。 取0不压缩，保留全备份目录。
PS: 除上面这些项，其他项一般不需要修改。


4.利用crontab配置定时任务（每天23:59开始备份）

1 2	#crontab -e 59 23 * * * YourPath/mysql_backup_shell/mysql_backup.sh > /tmp/monitor.log 2>&1

YourPath指解压缩后目录存放的路径，比如/data/backup_shell


5.命令行运行脚本

第一种运行方式
> ./mysql_backup.sh
根据backup.conf文件里面full_backup_month_day值， 和当天日期比较， 如果相同执行全备份；如果不相同执行增量备份。

第二种运行方式
mysql_backup.sh提供一个参数-t，方便测试和出错后手动启动备份使用。
  ./mysql_backup.sh -t full #会进行全备份
  ./mysql_backup.sh -t inc  #会进行增量份


说明：
1.每个月执行一次全备份，具体哪天由backup.conf文件里面full_backup_month_day项控制。
2.每天23:59执行增量备份
3.每次全备份前会删除上个月全备份和增量备份的文件， 换句话：只会持续保持一个月的数据内容。
4.增量备份基于上次的增量备份进行， 除全备以后第一次增量备份， 其余都基于上次增量备份目录进行。

三、脚本

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# xtrabackup backup shell # Author : zouqingyun # Date   : 2016-03-23 source /etc/profile work_dir=`dirname $0` cd $work_dir #获取配置文件中配置项的值 conf_file=$work_dir/backup.conf user=`sed '/^user=/!d;s/.*=//' $conf_file` password=`sed '/^password=/!d;s/.*=//' $conf_file` mysql_conf_file=`sed '/^mysql_conf_file=/!d;s/.*=//' $conf_file` port=`sed '/^port=/!d;s/.*=//' $conf_file` # mysql host host=`sed '/^host=/!d;s/.*=//' $conf_file` # mysql socket mysql_socket=`sed '/^socket=/!d;s/.*=//' $conf_file` backup_dir=`sed '/^backup_dir=/!d;s/.*=//' $conf_file` full_backup_month_day=`sed '/^full_backup_month_day=/!d;s/.*=//' $conf_file` full_backup_prefix=`sed '/^full_backup_prefix=/!d;s/.*=//' $conf_file` increment_prefix=`sed '/^increment_prefix=/!d;s/.*=//' $conf_file` mysql_conf_file=`sed '/^mysql_conf_file=/!d;s/.*=//' $conf_file` error_log_name=`sed '/^error_log=/!d;s/.*=//' $conf_file` index_file_name=`sed '/^index_file=/!d;s/.*=//' $conf_file` is_tar_full=`sed '/^is_tar_full=/!d;s/.*=//' $conf_file` #获取当前时间 backup_date=`date +%F` backup_time=`date +%H-%M-%S` backup_month_day=`date +%d` #获取日志和错误文件所在目录 log_dir=$work_dir/log var_dir=$work_dir/var #日志和错误文件路径 error_log=$log_dir/$error_log_name index_file=$var_dir/$index_file_name mkdir -p $backup_dir mkdir -p $log_dir mkdir -p $var_dir #调用xtrabckup进行全量备份 function full_backup() {   backup_folder=${full_backup_prefix}_${backup_date}_${backup_time}   echo "backup_folder: $backup_folder"   mkdir -p $backup_dir/$backup_folder   echo "xtrabackup --defaults-file=$mysql_conf_file --user=$user --password=$password --port=$port --socket=$mysql_socket --backup --no-lock --target-dir=$backup_dir/$backup_folder > $log_dir/${backup_folder}.log"   xtrabackup \   --defaults-file=$mysql_conf_file \    --user=$user \    --password=$password \    --port=$port \     --socket=$mysql_socket \     --backup \     --no-lock \     --target-dir=$backup_dir/$backup_folder > $log_dir/${backup_folder}.log 2>&1   return $? } #调用xtrabckup进行增量备份 function increment_backup() {   backup_folder=${increment_prefix}_${backup_date}_${backup_time}   echo "index_file : $index_file"   incr_base_folder=`sed -n '$p' $index_file | \                    awk -F '[, {}]*' '{print $3}' | \                    awk -F ':' '{print $2}'`   echo "backup_folder: $backup_folder"   echo "incr_base_folder: $incr_base_folder"   mkdir -p $backup_dir/$backup_folder   echo "xtrabackup --defaults-file=$mysql_conf_file --user=$user --password=$password --port=$port --socket=$mysql_socket --backup --no-lock --target-dir=$backup_dir/$backup_folder --incremental-basedir=$backup_dir/$incr_base_folder > $log_dir/${backup_folder}.log"   xtrabackup \     --defaults-file=$mysql_conf_file \     --user=$user \     --password=$password \     --port=$port \     --socket=$mysql_socket \     --backup \     --no-lock \     --target-dir=$backup_dir/$backup_folder \     --incremental-basedir=$backup_dir/$incr_base_folder > $log_dir/${backup_folder}.log 2>&1   return $? } #根据索引文件记录的恢复记录， 删除备份目录 function delete_before_backup() {   if [ ! -n "`cat $index_file`" ]; then     return   fi   cat $index_file | awk -F '[, {}]*' '{print $3}' | \     awk -v backup_dir=$backup_dir -F ':' '{if($2!=""){printf("rm -rf %s/%s\n", backup_dir, $2)}}' | \     /bin/bash   cat $index_file | awk -F '[, {}]*' '{print $3}' | \     awk -v log_dir=$log_dir -F ':' '{if($2!=""){printf("rm -rf %s/%s.log\n", log_dir, $2)}}' | \     /bin/bash } #备份索引文件 function backup_index_file() {   cp $index_file ${index_file}_$(date -d "1 day ago" +%F) } function send_index_file_to_remote() {   echo 'send index file ok' } #写入索引日志 function append_index_to_file() {   echo "{week_day:$backup_month_day, \          dir:${1}_${backup_date}_${backup_time}, \          type:${1}, \          date:${backup_date}}" >> $index_file } #写入解压日志 function append_tar_index_to_file() {   echo "{week_day:$backup_month_day, \          dir:${1}_${backup_date}_${backup_time}.tar.gz, \          type:${1}, \          date:${backup_date}}" >> $index_file } #记录错误日志 function logging_backup_err() {   echo "{week_day:$backup_month_day, \          dir:${1}_${backup_date}_${backup_time}, \          type:${1}, \          date:${backup_date}}" >> $error_log } #清除索引文件 function purge_index_from_file() {   > $index_file } #清除错误日志 function purge_err_log() {   > $error_log } #压缩全备份目录 function tar_backup_file() {   tar_file=${1}_${backup_date}_${backup_time}   tar -C $backup_dir -zcvf $backup_dir/${tar_file}.tar.gz ${tar_file}   echo "tar $1 ok" } function send_backup_to_remote() {   echo "send $1 remote ok" } #获取恢复的类型，返回类型：0:full, 1:inc # 0:full, 1:incr function get_backup_type() {   full_backup_month_day=`sed '/^full_backup_month_day=/!d;s/.*=//' $conf_file`   backup_type=0   if [ "${full_backup_month_day}_x" == "${backup_month_day}_x" ]; then     backup_type=0   else     backup_type=1   fi   if [ ! -n "`cat $index_file`" ]; then     backup_type=0   fi   return $backup_type } #检测配置文件各项数据合法性 function test_conf_file() {   if [ ! -n "$user" ]; then echo 'fail: configure file user not set'; exit 2; fi   #if [ ! -n "$password" ]; then echo 'fail: configure file password not set'; exit 2; fi   #if [ ! -n "$host" ]; then echo 'fail: configure file host not set'; exit 2; fi   if [ ! -n "$mysql_socket" ]; then echo 'fail: configure file mysql_socket not set'; exit 2; fi   #if [ ! -n "$port" ]; then echo 'fail: configure file port not set'; exit 2; fi   if [ ! -n "$backup_dir" ]; then echo 'fail: configure file backup_dir not set'; exit 2; fi   if [ ! -n "$full_backup_month_day" ]; then echo 'fail: configure file full_backup_month_day not set'; exit 2; fi   if [ ! -n "$full_backup_prefix" ]; then echo 'fail: configure file full_backup_prefix not set'; exit 2; fi   if [ ! -n "$increment_prefix" ]; then echo 'fail: configure file increment_prefix not set'; exit 2; fi   if [ ! -n "$mysql_conf_file" ]; then echo 'fail: configure file mysql_conf_file not set'; exit 2; fi   if [ ! -n "$error_log" ]; then echo 'fail: configure file error_log not set'; exit 2; fi   if [ ! -n "$index_file" ]; then echo 'fail: configure file index_file not set'; exit 2; fi   if [ ! -n "$is_tar_full" ]; then echo 'fail: configure file is_tar_full not set'; exit 2; fi } #运行主函数 function run() {   test_conf_file   backup_type=-1   #解析命令行参数   while getopts "t:" arg   do     case $arg in         t)             if [ "$OPTARG" = "$full_backup_prefix" ]; then                 backup_type=0             elif [ "$OPTARG" = "$increment_prefix" ]; then                 backup_type=1             fi             ;;         ?)             echo "unkonw argument"         exit 1         ;;         esac   done   if [ "$backup_type" -eq -1 ]; then     get_backup_type     backup_type=$?      fi   echo "backup_type: $backup_type"   case $backup_type in     0)#全量备份       echo '----------------------full backup start----------------'       echo 'delete_before_backup start'       delete_before_backup       echo 'call xtrabackup to full backup start'       full_backup       backup_ok=$?       if [ 0 -eq "$backup_ok" ]; then         if [ 1 -eq "$is_tar_full" ]; then           tar_backup_file $full_backup_prefix         fi         #send_backup_to_remote $full_backup_prefix         echo 'backup_index_file start'         backup_index_file         # send_index_file_to_remote         echo 'purge_index_from_file start'         purge_index_from_file         echo 'append_index_to_file start'         if [ 1 -eq "$is_tar_full" ]; then           append_tar_index_to_file $full_backup_prefix         fi         append_index_to_file $full_backup_prefix         echo 'call xtrabackup to increment backup start'         increment_backup         backup_ok=$?         if [ 0 -eq "$backup_ok" ]; then           # tar_backup_file $increment_prefix           # send_backup_to_remote $increment_prefix           echo 'append_index_to_file start'           append_index_to_file $increment_prefix           rm -rf ${backup_dir}/${full_backup_prefix}_${backup_date}_${backup_time}         else           rm -rf ${backup_dir}/${increment_prefix}_${backup_date}_${backup_time}           logging_backup_err $increment_prefix         fi       else         rm -rf ${backup_dir}/${full_backup_prefix}_${backup_date}_${backup_time}         logging_backup_err $full_backup_prefix       fi       ;;     1)#增量备份       echo '----------------------incr backup start----------------'       echo 'call xtrabackup to increment backup start'       increment_backup       backup_ok=$?       if [ 0 -eq "$backup_ok" ]; then         # tar_backup_file $increment_prefix         # send_backup_to_remote $increment_prefix         echo 'append_index_to_file start'         append_index_to_file $increment_prefix       else         rm -rf ${backup_dir}/${increment_prefix}_${backup_date}_${backup_time}         logging_backup_err $increment_prefix       fi       ;;   esac } run $@