MySql定时备份脚本

shell脚本mysql_backup_test_backup.sh

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#!/bin/bash # 设置mysql的登录用户名和密码(根据实际情况填写) mysql_user="***" mysql_password="****" mysql_host="localhost" mysql_port="3306" mysql_charset="utf8mb4"   # 备份文件存放地址(根据实际情况填写) backup_location=/home/app/***/sql_backup   # 是否删除过期数据 expire_backup_delete="ON" expire_days=7 backup_time=`date +%Y%m%d%H%M` backup_dir=$backup_location welcome_msg="Welcome to use MySQL backup tools!"   # 判断mysql实例是否正常运行 mysql_ps=`ps -ef |grep mysql |wc -l` mysql_listen=`netstat -an |grep LISTEN |grep $mysql_port|wc -l` if [ [$mysql_ps == 0] -o [$mysql_listen == 0] ]; then         echo "ERROR:MySQL is not running! backup stop!"         exit else         echo $welcome_msg fi   # 备份指定数据库中数据(此处假设数据库是mysql_backup_test) mysqldump -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password -B mysql_backup_test> $backup_dir/mysql_backup_test-$backup_time.sql flag=`echo $?` if [ $flag == "0" ];then         echo "database mysql_backup_test success backup to $backup_dir/mysql_backup_test-$backup_time.sql.gz" else         echo "database mysql_backup_test backup fail!" fi   # 删除过期数据 find $backup_dir -name "$dataname-*.sql" -type f -mtime +$expire_days -exec rm -rf {} \; > /dev/null 2>&1`

编辑定时任务:

能够在我们导出数据的时候在我们的脚本⾥带上全量结束的position

--master-data=0|1|2

crontab -e
# 添加定时任务(每天12:50以及23:50执行备份操作)
50 12,23 * * * cd /home/app/jinxd/;sh mysql_backup_test_backup.sh >> log.txt 2>>log.txt

遇到的问题

1.定时任务执行失败

可能是自己安装的mysql，定时器找不到mysql的路径，mysqldump前面加上mysql的bin路径

/usr/local/mysql/bin/mysqldump -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password -B $dataname> $backup_dir/$dataname-$backup_time.sql

2.定时器备份出来的时间不对，可能是定时器的时区不对

cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
service crond restart