Linux下MySQL定时自动完整备份（mysqldump+crontab）

#mysql专用目录
mkdir /mysql
#mysql备份目录
mkdir /mysql/backup
#mysql备份脚本
mkdir /mysql/backup/scripts
#mysql备份文件
mkdir /mysql/backup/files
#mysql备份日志
mkdir /mysql/backup/logs

vi /mysql/backup/scripts/backup_full.sh

#!/bin/bash

#备份目录
BACKUP_ROOT=/mysql/backup
BACKUP_FILEDIR=$BACKUP_ROOT/files
BACKUP_LOGDIR=$BACKUP_ROOT/logs

#当前日期
DATE=$(date +%Y%m%d)

######备份######

#查询所有数据库
#-uroot -p123456表示使用root账号执行命令，且root账号的密码为:123456
DATABASES=$(mysql -uroot -p123456 -e "show databases" | grep -Ev "Database|sys|information_schema")
#DATABASES=$(mysql -uroot -p123456 -e "SELECT SCHEMA_NAME FROM information_schema.SCHEMATA WHERE SCHEMA_NAME NOT IN ('sys','mysql','information_schema','performance_schema');" | grep -v "SCHEMA_NAME","ken.io") 
echo $DATABASES
#循环数据库进行备份
for db in $DATABASES
do
echo
echo ----------$BACKUP_FILEDIR/${db}_$DATE.sql.gz BEGIN----------
mysqldump -uroot -pRoot@1024 --default-character-set=utf8 -q --lock-all-tables --flush-logs -E -R --triggers -B ${db} | gzip > $BACKUP_FILEDIR/${db}_$DATE.sql.gz
echo ----------$BACKUP_FILEDIR/${db}_$DATE.sql.gz COMPLETE----------
echo
done

echo "done"

#执行备份脚本
sh /mysql/backup/scripts/backup_full.sh

#查看备份文件
ll /mysql/backup/files -h

#解压指定文件({file}自己替换成备份的文件)
gunzip /mysql/backup/files/{file}

yum install -y crontab

#添加定时任务
crontab -e

#每天凌晨3点执行
00 3 * * * sh /mysql/backup/scripts/backup_full.sh

#查看定时任务
crontab -l

#创建脚本文件
vi /mysql/backup/scripts/backup_full_clean.sh

#写入以下内容
#!/bin/bash
find /mysql/backup/files -mtime +7 -name "*.gz" -exec rm -rf {} \;

#添加定时任务
crontab -e

#每天凌晨1点执行
00 1 * * * sh /mysql/backup/scripts/backup_full_clean.sh

#查看定时任务
crontab -l