#!/bin/bash

#backup_mysql_data

#检查目录权限

BackupDir=/data/dumpbackup

SaveDir=/data/dumpbackup/data

fdate=`date "+%Y%m%d%H%M%S"`

chown -R mysql:mysql $BackupDir

chmod -R 775 $BackupDir

chmod -R 775 $SaveDir

#备份database库

function database () {

echo "`date "+%m %d %H:%M:%S"` Begin backup database" >> $BackupDir/backmysql.log

if [ ! -d $BackupDir/mysql ];then

mkdir -p $BackupDir/mysql

fi

chown -R mysql:mysql $BackupDir/mysql

/opt/mysql/mysql-8.0.25-linux-glibc2.12-x86_64/bin/mysqldump -h192.168.65.228 -P 3306 -u admin -p'password' databaseName --set-gtid-purged=off > $BackupDir/mysql/database_$fdate.sql

echo "`date "+%m %d %H:%M:%S"` backup database done" >> $BackupDir/backmysql.log

}

#压缩删除备份文件

function compress () {

echo "`date "+%m %d %H:%M:%S"` Begin complete database " >> $BackupDir/backmysql.log

chown -R mysql:mysql $BackupDir/

cd $BackupDir

tar zcvPf $BackupDir/mysql_$fdate.tar.gz $BackupDir/mysql/database_$fdate.sql

if [ ! -d $SaveDir ];then

mkdir -p $SaveDir

fi

cd $BackupDir

\cp $BackupDir/mysql_$fdate.tar.gz $SaveDir

rm -fr $BackupDir/mysql/database_$fdate.sql

rm -fr $BackupDir/mysql_$fdate.tar.gz

echo "`date "+%m %d %H:%M:%S"` copy data to savedir done" >> $BackupDir/backmysql.log

#判断备份文件数是否大于3

nuf=`find $SaveDir -name '*.tar.gz' -size +10M|wc -l`

if [[ $? -eq 0 && $nuf -gt 3 ]];then

#删除3天之前的数据

find $SaveDir -name '*.tar.gz' -mtime +3 -exec rm -rf {} \;

echo "`date "+%m %d %H:%M:%S"` delete nfs than 3 days" >> $BackupDir/backmysql.log

fi

echo `date "+%m %d %H:%M:%S"` "All is OK" >> $BackupDir/backmysql.log

\cp -r $BackupDir/backmysql.log $SaveDir

}

database

compress

echo $fdate "mysql数据库备份完成"