#!/bin/bash
#删除3天以前备份
source /etc/profile #加载系统环境变量
source ~/.bash_profile #加载用户环境变量
set -o nounset #引用未初始化变量时退出
#set -o errexit #执行shell命令遇到错误时退出
user="root"
password="TestBicon@123"
host="localhost"
port="3306"
#需备份的数据库，数组
db=("test")
#备份时加锁方式，
#MyISAM为锁表--lock-all-tables，
#InnoDB为锁行--single-transaction
lock="--single-transaction"
mysql_path="/usr/local/mysql"
backup_path="/data/mysql/bayonet"
date=$(date +%Y-%m-%d_%H-%M-%S)
day=3
backup_log="${backup_path}/backup.log"
#建立备份目录
if [ ! -e $backup_path ];then
mkdir -p $backup_path
fi
#删除以前备份
find $backup_path/backup -type f -mtime +$day -exec rm -rf {} \; > /dev/null 2>&1
#备份并压缩
backup_sql(){
dbname=$1
backup_name="${dbname}.sql"
backup_gz_name="${dbname}_${date}"
#-R备份存储过程，函数，触发器
mysqldump -h $host -P $port -u $user -p$password $lock --default-character-set=utf8 --opt --flush-logs --set-gtid-purged=OFF --events --triggers --routines --master-data=2 --databases $dbname > $backup_path/$backup_name
if [[ $? == 0 ]];then
cd $backup_path
tar zcpvf $backup_gz_name.tar.gz $backup_name
size=$(du $backup_gz_name.tar.gz -sh | awk '{print $1}')
#建立备份目录
if [ ! -e $backup_path/backup ];then
mkdir -p $backup_path/backup
fi
#归档
cp $backup_gz_name.tar.gz backup
#修改名称
mv $backup_gz_name.tar.gz ${dbname}.tar.gz
rm -rf $backup_name
echo "$date 备份 $dbname($size) 成功 "
else
cd $backup_path
rm -rf $backup_name
echo "$date 备份 $dbname 失败 "
fi
}
#循环备份
length=${#db[@]}
for (( i = 0; i < $length; i++ )); do
echo "开始备份数据库：${db[$i]}"
backup_sql ${db[$i]} >> $backup_log 2>&1
echo "结束备份数据库：${db[$i]}"
done
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