MySQL 8.4 : Use Clone Feature2025/01/31 |
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Use Clone Feature to take MySQL backup. |
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| [1] | Clone feature is not enabled by default, so enable it. |
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[root@www ~]#
vi /etc/my.cnf.d/mysql-server.cnf # add into [mysqld] section [mysqld] ..... .....
plugin-load=mysql_clone.so
bind-address=0.0.0.0
[root@www ~]#
systemctl restart mysqld
# show plugins [root@www ~]# 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. |
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# create a directory for clone data [root@www ~]# mkdir /var/lib/mysql-backup [root@www ~]# chown mysql:mysql /var/lib/mysql-backup # run getting clone # if specified directory already exists on the filesystem, it will be error, # so specify new directory for [directory = ***] section [root@www ~]# mysql -e "clone local data directory = '/var/lib/mysql-backup/backup01/';"
ll /var/lib/mysql-backup/backup01 total 70660 drwxr-x---. 2 mysql mysql 89 Jan 31 11:07 '#clone' -rw-r-----. 1 mysql mysql 4022 Jan 31 11:07 ib_buffer_pool -rw-r-----. 1 mysql mysql 12582912 Jan 31 11:07 ibdata1 drwxr-x---. 2 mysql mysql 23 Jan 31 11:07 '#innodb_redo' drwxr-x---. 2 mysql mysql 6 Jan 31 11:07 mysql -rw-r-----. 1 mysql mysql 26214400 Jan 31 11:07 mysql.ibd drwxr-x---. 2 mysql mysql 28 Jan 31 11:07 sys drwxr-x---. 2 mysql mysql 28 Jan 31 11:07 test_database -rw-r-----. 1 mysql mysql 16777216 Jan 31 11:07 undo_001 -rw-r-----. 1 mysql mysql 16777216 Jan 31 11:07 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]. |
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# on Donor Host, create a user and add [BACKUP_ADMIN] privilege for clone [root@www ~]# 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 = '10.0.0.31:3306'; Query OK, 0 rows affected (0.00 sec) mysql> clone instance from clone_user@10.0.0.31:3306 identified by 'password'; Query OK, 0 rows affected (0.57 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/'; |
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