1.配置server1
1.關閉server1的mysqld並刪除數據，查看uuid
[root@server1 mysql]# systemctl stop mysqld
[root@server1 mysql]# rm -fr *
[root@server1 mysql]# cat auto.cnf
[auto]
server-uuid=ad3a5dd5-b76f-11e9-bb9b-5254004772f0
2.編輯mysql配置文件，並重啓數據庫
[root@server1 mysql]# vim /etc/my.cnf
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
transaction_write_set_extraction=XXHASH64 ##指示server必須爲每個事務收集寫集合，並使用XXHASH64哈希算法將其編碼爲散列
loose-group_replication_group_name="3f7d3133-b4fb-11e9-a23a-52540039676f" ##告知插件，正在加入或創建的組要命名
loose-group_replication_start_on_boot=off ##指示插件在server啓動時不自動啓動組複製
loose-group_replication_local_address= "172.25.16.1:33061" ##告訴插件使用IP地址本地主機，端口33061用於接收來自組中其他成員的傳入連接
loose-group_replication_group_seeds= "172.25.16.1:33061,172.25.16.2:33061,172.25.16.3:33061"
loose-group_replication_bootstrap_group=off ##配置是否自動引導組
loose-group_replication_ip_whitelist="127.0.0.1,172.25.16.0/24" ##用戶白名單
loose-group_replication_enforce_update_everywhere_checks=ON ##多主模式下爲多主更新啓用或禁用嚴格一致性檢查
loose-group_replication_single_primary_mode=OFF ##設置組自動選擇一個server來處理讀/寫工作
[root@server1 mysql]# systemctl start mysqld
[root@server1 mysql]# systemctl restart mysqld
3.獲取初始密碼，並登陸數據庫修改密碼
[root@server1 mysql]# cat /var/log/mysql.log | grep password
2019-08-05T10:56:28.716457Z 1 [Note] A temporary password is generated for root@localhost: QllupXywe3;b
[root@server1 mysql]# mysql -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.24-log
Copyright (c) 2000, 2018, 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.
mysql> alter user root@localhost identified by 'Szy+123en';
4.在server1上啓動組複製
mysql> show databases;
mysql> SET SQL_LOG_BIN=0; #禁用二進制日至
mysql> CREATE USER rpl_user@'%' IDENTIFIED BY 'Bgg+2019'; #創建用戶
mysql> GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%'; #加用戶權限
mysql> FLUSH PRIVILEGES; #刷新數據
mysql> SET SQL_LOG_BIN=1; #啓用二進制日至
mysql> CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='Szy+123en' FOR CHANNEL 'group_replication_recovery'; #當配置了用戶，使用CHANGE MASTER TO語句將服務器爲下一次需要從其他成員恢復狀態時使SET SQL_LOG_BIN=0;用group_replication_recovery複製通道的給定憑證，發出以下命令，用創建用戶時直接使用的值替換rpl_user和密碼
mysql> INSTALL PLUGIN group_replication SONAME 'group_replication.so'; #安裝組插件
mysql> SHOW PLUGINS;
mysql> SET GLOBAL group_replication_bootstrap_group=ON; #master上要先打開，等打開組複製之後再開啓（slave上不用進行）
mysql> START GROUP_REPLICATION; #打開組複製
mysql> SET GLOBAL group_replication_bootstrap_group=OFF;
5.在server1上創建表，便於測試
mysql> create database test;
Query OK, 1 row affected (0.02 sec)
mysql> use test;
Database changed
mysql> create table class (name int primary key,grades text not null);
Query OK, 0 rows affected (0.06 sec)
mysql> insert into class values (1,'tom');
Query OK, 1 row affected (0.02 sec)
mysql> select * from class
-> ;
+------+--------+
| name | grades |
+------+--------+
| 1 | tom |
+------+--------+
1 row in set (0.00 sec)
6.查看server1是否加入組複製羣組
mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| group_replication_applier | ad3a5dd5-b76f-11e9-bb9b-5254004772f0 | server1 | 3306 | ONLINE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
1 row in set (0.00 sec)
2.配置server2
1.清空數據庫數據
[root@server2 ~]# systemctl stop mysqld
[root@server2 ~]# cd /var/lib/mysql
[root@server2 mysql]# ls
[root@server2 mysql]# rm -rf *
2.修改數據庫配置文件
[root@server2 ~]# vim /etc/my.cnf
enforce-gtid-consistency=true
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="3f7d3133-b4fb-11e9-a23a-52540039676f"
loose-group_replication_start_on_boot=off
loose-group_replication_local_address= "172.25.16.2:33061"
loose-group_replication_group_seeds= "172.25.16.1:33061,172.25.16.2:33061,172.25.16.3:33061"
loose-group_replication_bootstrap_group=off
loose-group_replication_ip_whitelist="127.0.0.1,172.25.16.0/24"
loose-group_replication_enforce_update_everywhere_checks=ON
loose-group_replication_single_primary_mode=OFF
[root@server2 ~]# systemctl start mysqld
3.獲取臨時密碼，進入數據庫修改密碼
[root@server2 mysql]# cat /var/log/mysqld.log | grep password
2019-08-05T11:51:03.681848Z 1 [Note] A temporary password is generated for root@localhost: >NuN6,w2sEq(
[root@server2 mysql]# mysql -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.24-log
Copyright (c) 2000, 2018, 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.
mysql> alter user root@localhost identified by 'Szy+123en';
Query OK, 0 rows affected (0.02 sec)
4.啓動server2的組複製
mysql> SET SQL_LOG_BIN=0;
Query OK, 0 rows affected (0.00 sec)
mysql> CREATE USER rpl_user@'%' IDENTIFIED BY 'Szy+123en';
Query OK, 0 rows affected (0.01 sec)
mysql> GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%';
Query OK, 0 rows affected (0.00 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
mysql> SET SQL_LOG_BIN=1;
Query OK, 0 rows affected (0.00 sec)
mysql> CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='Szy+123en' FOR CHANNE
Query OK, 0 rows affected, 2 warnings (0.09 sec)
mysql> INSTALL PLUGIN group_replication SONAME 'group_replication.so';
Query OK, 0 rows affected (0.24 sec)
mysql> set global group_replication_allow_local_disjoint_gtids_join=on;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected, 1 warning (5.90 sec)
測試：在server1上查看server2是否加入組複製羣組，是否在線
mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| group_replication_applier | 4d41bf26-b777-11e9-aa93-52540039676f | server2 | 3306 | ONLINE |
| group_replication_applier | ad3a5dd5-b76f-11e9-bb9b-5254004772f0 | server1 | 3306 | ONLINE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
2 rows in set (0.00 sec)
在server1的class表插入的數據，看server2是否同步成功
3.配置server3
1.將server2的安裝包傳給server3
2.安裝所有包
3.編輯mysql配置文件
[root@server3 ~]# vim /etc/my.cnf
server-id=3
gtid_mode=ON
enforce-gtid-consistency=true
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="3f7d3133-b4fb-11e9-a23a-52540039676f"
loose-group_replication_start_on_boot=off
loose-group_replication_local_address= "172.25.16.3:33061"
[root@server3 ~]# systemctl start mysqld
4.獲取臨時密碼，進入數據庫並修改密碼
[root@server3 ~]# cat /var/log/mysqld.log | grep password
2019-08-05T12:29:43.983430Z 1 [Note] A temporary password is generated for root@localhost: bcj(gD>Uk6oF
[root@server3 ~]# mysql -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.24-log
Copyright (c) 2000, 2018, 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.
mysql> alter user root@localhost identified by 'Szy+123en';
Query OK, 0 rows affected (0.02 sec)
5.在server3開啓組複製
mysql> SET SQL_LOG_BIN=0;
Query OK, 0 rows affected (0.00 sec)
mysql> CREATE USER rpl_user@'%' IDENTIFIED BY 'Szy+123en';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%';
Query OK, 0 rows affected (0.00 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
mysql> SET SQL_LOG_BIN=1;
Query OK, 0 rows affected (0.00 sec)
mysql> CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='Szy+123en' FOR CHANNEL 'group_replication_recovery';
Query OK, 0 rows affected, 2 warnings (0.08 sec)
mysql> INSTALL PLUGIN group_replication SONAME 'group_replication.so';
Query OK, 0 rows affected (0.20 sec)
mysql> set global group_replication_allow_local_disjoint_gtids_join=on;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected, 1 warning (3.50 sec)
測試：
在server1上查看server3是否加入，並在線
mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
| group_replication_applier | 4d41bf26-b777-11e9-aa93-52540039676f | server2 | 3306 | ONLINE |
| group_replication_applier | ad3a5dd5-b76f-11e9-bb9b-5254004772f0 | server1 | 3306 | ONLINE |
| group_replication_applier | b4443ef0-b77c-11e9-98b7-52540046c65d | server3 | 3306 | ONLINE |
+---------------------------+--------------------------------------+-------------+-------------+--------------+
3 rows in set (0.08 sec)
server3是否能夠查看class表裏的數據
在server3的class表裏添加信息
server2和server1可以查看到添加的信息
