Linux 使用crontab定时备份Mysql数据库

1、在usr/usr_sh目录新建mysql_bak.sh

确保新建/opt/shell/目录、/usr/bin/mysql为mysql启动命令、/data/htdocs/web/WEB-INF/classes/project.properties为项目配置文件、/data/mysql_bak/为数据库备份路径

 

2、编写mysql_bak.sh备份数据库脚本内容

#!/bin/bash
#此脚本直接执行即可备份，记得添加计划任务定时备份
num=$(rpm -qa |grep dos2unix |wc -l)
if [ $num != 1 ];then
        yum install dos2unix -y
fi
/usr/bin/dos2unix -k /data/htdocs/web/WEB-INF/classes/project.properties >/dev/null 2>&1
#数据库地址用户名密码统一设置为变量
myip=$(head -n 5  /data/htdocs/web/WEB-INF/classes/project.properties |grep "jdbc:mysql" |awk -F ":" '{print $3}'|awk -F "//" '{print $2}')
username=$(head -n 5 /data/htdocs/web/WEB-INF/classes/project.properties |grep "jdbc.username"|awk -F "=" '{print $2}')
pass=`head -n 5  /data/htdocs/web/WEB-INF/classes/project.properties |grep jdbc.pass|awk -F "=" '{print $2}'`
#备份时间
b=$(date +%Y_%m_%d_%H:%M)
#MySQL备份路径
mkdir -p /data/mysql_bak/$b
#MySQL保留15备份记录
find /data/mysql_bak/ -type d -mtime +15 -exec rm -rf {} \; >/dev/null 2>&1
#远程备份数据库
/usr/bin/mysql -u$username -p$pass -h $myip -e 'show databases' | grep -v information_schema | grep -v Database |grep -v performance_schema| grep -v mysql > /opt/shell/libname.txt
for i in `cat /opt/shell/libname.txt`
do
         /usr/bin/mysqldump -u$username -p$pass -h $myip  --default-character-set=utf8 --skip-lock-tables  ${i} |gzip > /data/mysql_bak/$b/${i}.sql.gz
done

 

3、使用crontab创建定时任务

[root@rabbitmq2 /]crontab -e 

添加0 */1 * * *  /usr/usr_sh/mysql_bak.sh 每小时一次启动执行备份命令

service crond restart重新启动定时任务

 

4、相关的crontab可以参考https://baijiahao.baidu.com/s?id=1609952845993989858&wfr=spider&for=pc

 

5、其中如果写了用户名和密码，linux会发送邮件到/var/spool/mail/root

mysql: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.