MySql定時備份腳本

shell腳本mysql_backup_test_backup.sh

#!/bin/bash
# 設置mysql的登陸用戶名和密碼(根據實際狀況填寫)
mysql_user="***"
mysql_password="****"
mysql_host="localhost"
mysql_port="3306"
mysql_charset="utf8mb4"

# 備份文件存放地址(根據實際狀況填寫)
backup_location=/home/app/***/sql_backup

# 是否刪除過時數據
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!"

# 判斷mysql實例是否正常運行
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

# 備份指定數據庫中數據(此處假設數據庫是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

# 刪除過時數據
find $backup_dir -name "$dataname-*.sql" -type f -mtime +$expire_days -exec rm -rf {} \; > /dev/null 2>&1`

編輯定時任務:

可以在咱們導出數據的時候在咱們的腳本⾥帶上全量結束的position

--master-data=0|1|2

crontab -e # 添加定時任務(天天12:50以及23:50執行備份操做) 50 12,23 * * * cd /home/app/jinxd/;sh mysql_backup_test_backup.sh >> log.txt 2>>log.txt

遇到的問題

1.定時任務執行失敗

多是本身安裝的mysql，定時器找不到mysql的路徑，mysqldump前面加上mysql的bin路徑

/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.定時器備份出來的時間不對，多是定時器的時區不對

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