MySQL 8.0 : Use Clone Feature2024/06/03 |
|
Use Clone Feature to take MySQL backup.
|
|
| [1] | Clone feature is not enabled by default, so enable it. |
|
root@dlp:~#
vi /etc/mysql/mysql.conf.d/mysqld.cnf # add into [mysqld] section [mysqld] ..... .....
plugin-load=mysql_clone.so
# line 31 : if cloning from other hosts, change bind address
bind-address = 0.0.0.0
mysqlx-bind-address = 127.0.0.1
root@dlp:~#
systemctl restart mysql
# show plugins root@dlp:~# mysql -e "select plugin_name, plugin_status, plugin_type from information_schema.plugins where plugin_name = 'clone';" Enter password: +-------------+---------------+-------------+ | plugin_name | plugin_status | plugin_type | +-------------+---------------+-------------+ | clone | ACTIVE | CLONE | +-------------+---------------+-------------+ |
| [2] | Get Clone in a directory on localhost. |
|
# create a directory for clone data root@dlp:~# mkdir /home/mysql_backup root@dlp:~# chown mysql:mysql /home/mysql_backup # writing to target directory for cloning is denied by AppArmor, so allow it before running root@dlp:~# vi /etc/apparmor.d/usr.sbin.mysqld # add target directory to allow mysqld can write
/usr/sbin/mysqld {
.....
.....
/home/mysql_backup/ r,
/home/mysql_backup/** rwk,
}
root@dlp:~#
systemctl restart apparmor
# run getting clone # if specified directory already exists on the filesystem, it will be error, # so specify new directory for [directory = ***] section root@dlp:~# mysql -e "clone local data directory = '/home/mysql_backup/backup01/';"
ll /home/mysql_backup/backup01 total 70688 drwxr-x--- 2 mysql mysql 4096 Jun 3 01:12 '#clone'/ drwxr-x--- 2 mysql mysql 4096 Jun 3 01:12 '#innodb_redo'/ drwxr-x--- 7 mysql mysql 4096 Jun 3 01:12 ./ drwxr-xr-x 3 mysql mysql 4096 Jun 3 01:12 ../ -rw-r----- 1 mysql mysql 3940 Jun 3 01:12 ib_buffer_pool -rw-r----- 1 mysql mysql 12582912 Jun 3 01:12 ibdata1 drwxr-x--- 2 mysql mysql 4096 Jun 3 01:12 mysql/ -rw-r----- 1 mysql mysql 26214400 Jun 3 01:12 mysql.ibd drwxr-x--- 2 mysql mysql 4096 Jun 3 01:12 sys/ drwxr-x--- 2 mysql mysql 4096 Jun 3 01:12 test_database/ -rw-r----- 1 mysql mysql 16777216 Jun 3 01:12 undo_001 -rw-r----- 1 mysql mysql 16777216 Jun 3 01:12 undo_002 |
| [3] | To use [CLONE INSTANCE FROM], it's possible to get clone from a remote host directly. On Official documents, clone source is called [Donor] and clone target is called [Recipient]. |
|
# on Donor Host, create a user and add [BACKUP_ADMIN] privilege for clone root@dlp:~# mysql mysql> create user 'clone_user'@'%' identified by 'password'; Query OK, 0 rows affected (0.09 sec) mysql> grant BACKUP_ADMIN on *.* to 'clone_user'@'%'; Query OK, 0 rows affected (0.10 sec) # on Recipient Host, create a user and add [CLONE_ADMIN] privilege for clone root@node01:~# mysql mysql> create user 'clone_user'@'%' identified by 'password'; Query OK, 0 rows affected (0.11 sec) mysql> grant CLONE_ADMIN on *.* to 'clone_user'@'%'; Query OK, 0 rows affected (0.04 sec) # on Recipient Host, run Clone job # before clone, set [set global clone_valid_donor_list = (Donor IP address:port)] # clone data is copied under [/var/lib/mysql] mysql> set global clone_valid_donor_list = '10.0.0.30:3306'; Query OK, 0 rows affected (0.00 sec) mysql> clone instance from clone_user@10.0.0.30:3306 identified by 'password'; Query OK, 0 rows affected (0.45 sec) # confirm clone status # OK if [STATE] is [Completed] mysql> select STATE from performance_schema.clone_status; +-----------+ | STATE | +-----------+ | Completed | +-----------+ 1 row in set (0.00 sec) # if specify cloned target directory, add [data directory = '***'] # but then it needs to set suitable permission to the target directory like [2], [3] mysql> clone instance from clone_user@10.0.0.30:3306 identified by 'password' data directory = '/home/mysql_backup/backup01/'; |
| Sponsored Link |