MySQL 8.0中如何通过Clone来实现一个远程从库的搭建

这篇文章给大家分享的是有关MySQL 8.0中如何通过Clone来实现一个远程从库的搭建的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。

环境如下

Mater: 192.168.3.133 port:3307 doner 捐赠者

Slave: 192.168.3.134 port:3307 recipient 接受者

第一步：两台机器MySQL分别进行初始化安装

进入MySQL软件目录进行初始化安装并修改密码：（MySQL8.0.19 下载解压步骤省略）

[root@mgr2 bin]#cd /zcloud/db/abcMgr/abcMgr02/mysql/bin  [root@mgr2 bin]# ./mysqld --initialize --user=mysql  [root@mgr2 bin]# ./mysqld_safe --user=mysql &  [1] 19556  [root@mgr2 bin]# 2020-03-12T01:32:26.503048Z mysqld_safe Logging to ‘/rock/mysqldata/error.log’.  2020-03-12T01:32:26.536292Z mysqld_safe Starting mysqld daemon with databases from /rock/mysqldata  [root@mgr2 bin]#  [root@mgr2 bin]# mysql -uroot -p -P3307  Enter password:  Welcome to the MySQL monitor. Commands end with ; or \g.  Your MySQL connection id is 8  Server version: 8.0.19  Copyright © 2000, 2019, Oracle and/or its affiliates. All rights reserved.  Oracle is a registered trademark of Oracle Corporation and/or its  affiliates. Other names may be trademarks of their respective  owners.  Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.  root@localhost:(none) 09:33:06 >alter user user() identified by ‘root1234’;  Query OK, 0 rows affected (0.00 sec) root@localhost:(none) 09:33:26 >flush privileges;  Query OK, 0 rows affected (0.00 sec)  root@localhost:(none) 09:33:31 >exit  Bye

第二步：doner节点192.168.3.133相关操作

–创建用户

root@localhost:(none) 10:07:05 >create user ‘donor_user’@‘192.168.3.134’ identified by ‘password’;  Query OK, 0 rows affected (0.00 sec)  root@localhost:(none) 10:07:07 >grant backup_admin on . to ‘donor_user’@‘192.168.3.134’;  Query OK, 0 rows affected (0.01 sec)

–安装clone插件

root@localhost:(none) 10:23:16 >install plugin clone soname ‘mysql_clone.so’;  Query OK, 0 rows affected (0.01 sec)

第三步：recipient节点192.168.3.134相关操作

–创建用户（也可以不创建用户，用root直接操作）

mysql> create user ‘recipient_user’@‘192.168.3.134’ identified by ‘password’;

–安装clone插件

mysql> grant clone_admin on . to ‘recipient_user’@‘192.168.3.134’;

–设置参数clone_valid_donor_list

root@localhost:(none) 03:28:40 >set global clone_valid_donor_list=‘192.168.3.133:3307’;  Query OK, 0 rows affected (0.00 sec)

–换成recipient_user’@‘192.168.3.134’ 用户登陆，执行clone语句(这里其实可以用本地root用户直接进行登录操作)

[root@mgr3 bin]# mysql -urecipient_user -ppassword -P3307 -h292.168.3.134  recipient_user@192.168.3.134:(none) 03:39:46 >clone instance from ‘donor_user’@‘192.168.3.133’:3307 identified by ‘password’;  Query OK, 0 rows affected (2.34 sec)  recipient_user@192.168.3.134:(none) 03:39:57 >Restarting mysqld…  2020-03-12T07:40:01.285267Z mysqld_safe Number of processes running now: 0  2020-03-12T07:40:01.290169Z mysqld_safe mysqld restarted

至此，远程数据的克隆已经完成了。

通过查询两张表来监控一下克隆的进度和结果状态：

–查看clone进度和状态

root@localhost:(none) 03:34:49 >SELECT * FROM performance_schema.clone_progress;  ±-----±----------±----------±---------------------------±---------------------------±--------±----------±----------±----------±-----------±--------------+ | ID | STAGE | STATE | BEGIN_TIME | END_TIME | THREADS | ESTIMATE | DATA | NETWORK | DATA_SPEED | NETWORK_SPEED |  ±-----±----------±----------±---------------------------±---------------------------±--------±----------±----------±----------±-----------±--------------+ | 1 | DROP DATA | Completed | 2020-03-12 15:29:15.385694 | 2020-03-12 15:29:15.634609 | 1 | 0 | 0 | 0 | 0 | 0 |  | 1 | FILE COPY | Completed | 2020-03-12 15:29:15.634765 | 2020-03-12 15:29:17.452961 | 1 | 465800520 | 465800520 | 465833356 | 0 | 0 |  | 1 | PAGE COPY | Completed | 2020-03-12 15:29:17.453144 | 2020-03-12 15:29:17.554224 | 1 | 0 | 0 | 99 | 0 | 0 |  | 1 | REDO COPY | Completed | 2020-03-12 15:29:17.554413 | 2020-03-12 15:29:17.654430 | 1 | 2560 | 2560 | 3031 | 0 | 0 |  | 1 | FILE SYNC | Completed | 2020-03-12 15:29:17.654596 | 2020-03-12 15:29:17.730172 | 1 | 0 | 0 | 0 | 0 | 0 |  | 1 | RESTART | Completed | 2020-03-12 15:29:17.730172 | 2020-03-12 15:29:22.160372 | 0 | 0 | 0 | 0 | 0 | 0 |  | 1 | RECOVERY | Completed | 2020-03-12 15:29:22.160372 | 2020-03-12 15:29:22.478889 | 0 | 0 | 0 | 0 | 0 | 0 |  ±-----±----------±----------±---------------------------±---------------------------±--------±----------±----------±----------±-----------±--------------+  7 rows in set (0.00 sec)  root@localhost:(none) 03:34:52 >SELECT * FROM performance_schema.clone_status\G  *************************** 1. row ***************************  ID: 1  PID: 0  STATE: Completed  BEGIN_TIME: 2020-03-12 15:29:15.385  END_TIME: 2020-03-12 15:29:22.479  SOURCE: 192.168.3.133:3307  DESTINATION: LOCAL INSTANCE  ERROR_NO: 0  ERROR_MESSAGE:  BINLOG_FILE: mysql-bin.000002  BINLOG_POSITION: 421  GTID_EXECUTED: 3e75bf2f-6401-11ea-8995-000c29db65a6:1  1 row in set (0.00 sec)

–在主库133上建立复制账号：

root@localhost:(none) 04:12:23 >create user repl@‘192.168.3.%’ identified by ‘repl’;  Query OK, 0 rows affected (0.00 sec)  root@localhost:(none) 04:13:03 >grant all on . to repl@‘192.168.3.%’; Query OK, 0 rows affected (0.00 sec)

–在从库134上进行复制步骤的完成：

root@localhost:(none) 04:16:09 >change master to master_host=‘192.168.3.133’,master_port=3307,master_user=‘repl’,master_password=‘repl’,master_auto_position=1; Query OK, 0 rows affected, 2 warnings (0.00 sec)  root@localhost:(none) 04:17:32 >start slave;  Query OK, 0 rows affected (0.00 sec)  root@localhost:(none) 04:17:35 >show slave status\G  *************************** 1. row ***************************  Slave_IO_State: Waiting for master to send event  Master_Host: 192.168.3.133  Master_User: repl  Master_Port: 3307  Connect_Retry: 60  Master_Log_File: mysql-bin.000002  Read_Master_Log_Pos: 1193  Relay_Log_File: mgr3-relay-bin.000002  Relay_Log_Pos: 904  Relay_Master_Log_File: mysql-bin.000002  Slave_IO_Running: Yes  Slave_SQL_Running: Yes  Replicate_Do_DB:  Replicate_Ignore_DB:  Replicate_Do_Table:  Replicate_Ignore_Table:  Replicate_Wild_Do_Table:  Replicate_Wild_Ignore_Table:  Last_Errno: 0  Last_Error:  Skip_Counter: 0  Exec_Master_Log_Pos: 1193  Relay_Log_Space: 1103  Until_Condition: None  Until_Log_File:  Until_Log_Pos: 0  Master_SSL_Allowed: No  Master_SSL_CA_File:  Master_SSL_CA_Path:  Master_SSL_Cert:  Master_SSL_Cipher:  Master_SSL_Key:  Seconds_Behind_Master: 0  Master_SSL_Verify_Server_Cert: No  Last_IO_Errno: 0  Last_IO_Error:  Last_SQL_Errno: 0  Last_SQL_Error:  Replicate_Ignore_Server_Ids:  Master_Server_Id: 207  Master_UUID: 3e75bf2f-6401-11ea-8995-000c29db65a6  Master_Info_File: mysql.slave_master_info  SQL_Delay: 0  SQL_Remaining_Delay: NULL  Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates  Master_Retry_Count: 86400  Master_Bind:  Last_IO_Error_Timestamp:  Last_SQL_Error_Timestamp:  Master_SSL_Crl:  Master_SSL_Crlpath:  Retrieved_Gtid_Set: 3e75bf2f-6401-11ea-8995-000c29db65a6:3-4  Executed_Gtid_Set: 3e75bf2f-6401-11ea-8995-000c29db65a6:1-4  Auto_Position: 1  Replicate_Rewrite_DB:  Channel_Name:  Master_TLS_Version:  Master_public_key_path:  Get_master_public_key: 0  Network_Namespace:  1 row in set (0.00 sec)

至此远程从库通过clone插件的方式搭建成功了，非常简单也非常快速，不需要mysqldump也不需要xtrabackup，在线搭建成功，非常快，以后用8.0可以考虑这种便捷的方式了。

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