mysql增量备份脚本

2、增量备份

2.1、添加备份脚本

[root@localhost]# vim /mnt/data/backup/mysql/mysql_m_bak_diff.sh

#!/bin/bash
#mysql 增量备份
time=`date +%Y%m%d`
now=`date +%F' '%T`
etime=`date -d '-7 day' +%Y%m%d`
#备份文件路径
mkdir -p /mnt/data/backup/mysql/diff_back/$time
mkdir -p /mnt/data/backup/mysql/diff_back/$time/log
backupdir="/mnt/data/backup/mysql/diff_back/$time"
log_dir="/mnt/data/backup/mysql/diff_back/$time/log"
#bin-log日志文件路径
BinFile="/mnt/data/mysql/logs/"
user=root
passwd=123456echo "$now 重新生成binlog日志" >> $log_dir/$time.log
/mnt/data/mysql/bin/mysqladmin -P3308 -u$user -p$passwd --socket=/mnt/data/mysql/mysql.sock flush-logs
if [ $? -eq 0 ];then
    echo "$now binlog日志重新生成成功" >> $log_dir/$time.log
    echo "$now Begin backup mysql database" >> $log_dir/$time.log
    #查找binlog日志
    new_blog=`/mnt/data/mysql/bin/mysql -P3308 -u$user -p$passwd --socket=/mnt/data/mysql/mysql.sock -e "show master status\G" |grep 'File'|awk '{print $2}'`
    num=`/mnt/data/mysql/bin/mysql -P3308 -u$user -p$passwd --socket=/mnt/data/mysql/mysql.sock -e "show master status\G" |grep 'File'|awk '{print $2}'|awk -F '.' '{print $2}'`
    next_num=`expr $num - 1`
    old_blog=`find $BinFile -name "mysql-bin.*$next_num"`
    #备份文件
    \cp  $old_blog $backupdir/
    old_blog_n=`find $backupdir -name "mysql-bin.*$next_num"`
    mv $old_blog_n $backupdir/master_bak_$time.sql
        if [ $? -eq 0 ];then
            echo "$now mysql copy successfully " >> $log_dir/$time.log
            echo "$now 开始执行压缩......" >> $log_dir/$time.log
            tar -zcvf $backupdir/master_bak_$time.tar.gz -C  $backupdir master_bak_$time.sql
            if [ $? -eq 0 ];then
                echo  "$now 文件压缩成功......" >> $log_dir/$time.log
                rm -rf $backupdir/master_bak_$time.sql
                size=`du -sh $backupdir/master_bak_$time.tar.gz |awk '{print $1}'`
                echo "$now backup mysql database successfully completed" >> $log_dir/$time.log
                echo "$now deploy-主数据库数据备份成功——增量备份,文件大小为:$size\n 二进制文件为: $old_blog_n" > /tmp/tmp.log
                rm -rf /tmp/tmp.log
            else
                echo  "$now 文件压缩失败......" >> $log_dir/$time.log
                echo "$now deploy-主数据库数据备份成功__增量备份,但文件压缩失败,\n 二进制文件为: $old_blog_n " > /tmp/tmp.log
                rm -rf /tmp/tmp.log
            fi
        else
            echo "$now backup mysql database faild" >> $log_dir/$time.log
            echo "$now deploy-主数据库数据备份失败——增量备份,请检查mysql是否正常" > /tmp/tmp.log
            rm -rf /tmp/tmp.log
        fi
​
else
    echo "$now binlog日志重新生成失败" >> $log_dir/$time.log
    echo "$now deploy-主数据库数据备份失败__差量备份,刷新binlog日志失败" > /tmp/tmp.log
    rm -rf /tmp/tmp.log
fi

2.2、添加执行权限

[root@localhost ~]# chmod +x /mnt/data/backup/mysql/mysql_m_bak_diff.sh

2.3、添加计划任务

[root@localhost ~]# crontab -e   #添加内容，每天2点执行
0 2 * * * sh /mnt/data/backup/mysql/mysql_m_bak_diff.sh
​
#wq保存退出

2.4、手动备份

[root@localhost ~]# sh /mnt/data/backup/mysql/mysql_m_bak_diff.sh
mysqladmin: [Warning] Using a password on the command line interface can be insecure.
mysql: [Warning] Using a password on the command line interface can be insecure.
mysql: [Warning] Using a password on the command line interface can be insecure.
master_bak_20230223.sql

2.5、查看备份文件

[root@localhost ~]# ll -h /mnt/data/backup/mysql/diff_back/20230223/
总用量 120K
drwxr-xr-x. 2 root root   26 2月  23 14:22 log
-rw-r--r--. 1 root root 119K 2月  23 14:40 master_bak_20230223.tar.gz
[root@ops deploy]# cat /mnt/data/backup/mysql/diff_back/20230223/log/20230223.log
2023-02-23 14:40:07 重新生成binlog日志
2023-02-23 14:40:07 binlog日志重新生成成功
2023-02-23 14:40:07 Begin backup mysql database
2023-02-23 14:40:07 mysql copy successfully 
2023-02-23 14:40:07 开始执行压缩......
2023-02-23 14:40:07 文件压缩成功......
2023-02-23 14:40:07 backup mysql database successfully completed

2.6、增量数据恢复

[root@localhost ~]# mysqlbinlog --no-defaults --start-datetime="2022-10-31 17:53:00" --stop-datetime="2022-11-01 16:18:00" --database=dbname   mysql-bin.000073 | mysql -uroot -p123456     #指定时间段，指定库进行恢复