MySQL數據庫的備份與恢復（5）——編寫一個簡單的mysqldump分庫備份腳本

MySQL數據庫的備份與恢復（5）——編寫一個簡單的mysqldump分庫備份腳本

編寫一個腳本，用於備份除了information_schema和performance_schema數據庫之外的所有數據庫，每個數據庫生成一個sql文件。

step1、取出MySQL包含的所有數據庫名稱

[root@Mysql11 tmp]# mysql -uroot -p123456 -e "show databases;"
mysql: [Warning] Using a password on the command line interface can be insecure.
+--------------------+
| Database           |
+--------------------+
| information_schema |
| hist               |
| mysql              |
| performance_schema |
| sys                |
| wanggx             |
+--------------------+

step2、過濾掉系統數據庫和標題行

[root@Mysql11 tmp]# mysql -uroot -p123456 -e "show databases;"|grep -Evi "database|information|performance"
mysql: [Warning] Using a password on the command line interface can be insecure.
hist
mysql
sys
wanggx

step3、編寫腳本

vim backup.sh

腳本的內容如下：

### 利用for循環取出所有的數據庫名稱，具體的原理參見step1和step2
for dbname in `mysql -uroot -p123456 -e "show databases;"|grep -Evi "database|infor|perfor"`
do
    ### 針對每個數據庫名稱生成相應的mysqldump命令
    mysqldump -uroot -p123456 --events -B $dbname|gzip > /tmp/${dbname}_bak.sql.gz
done

step4、爲腳本增加可執行權限

[root@Mysql11 tmp]# pwd
/tmp
[root@Mysql11 tmp]# vim backup.sh
[root@Mysql11 tmp]# chmod +x backup.sh 
[root@Mysql11 tmp]# ll
總用量 4
-rwxr-xr-x. 1 root root 184 7月   2 15:09 backup.sh

step5、執行腳本，查看執行結果

[root@Mysql11 tmp]# ./backup.sh
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.
mysqldump: [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.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
[root@Mysql11 tmp]# ls
backup.sh  hist_bak.sql.gz  mysql_bak.sql.gz  sys_bak.sql.gz  wanggx_bak.sql.gz