MySQL Group Replication multi-machine multi-instance installation configuration

1. Configure hosts

172.16.90.39 node3-01 node3-01.novalocal
172.16.90.40 node3-02 node3-02.novalocal
172.16.90.41 node3-03 node3-03.novalocal

2. Create a database instance on each node

mkdir -p /data/mysql/{data,logs}
cd /data/mysql
chown -R mysql:mysql *
cd /usr/local/mysql/
chown -R mysql:mysql *
bin/mysqld --initialize-insecure --basedir=/usr/local/mysql/ --datadir=/data/mysql/data/

3. Configure the first node: /etc/my.cnf

[mysqld]
#Server Configuration
basedir=/usr/local/mysql
datadir=/data/mysql/data
port = 3306
socket = /usr/local/mysql/mysql.sock
user=mysql


#Replication Framework
server_id=1
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=/data/mysql/logs/binlog
binlog_format=ROW
binlog_row_image=minimal
relay-log=/data/mysql/logs/relay-bin

#Group Replication
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="0374cfa3-deae-11e6-b0fe-fa163e2d23ab"       
loose-group_replication_start_on_boot=off
loose-group_replication_local_address= "node3-01:24901"
loose-group_replication_group_seeds= "node3-01:24901,node3-02:24901,node3-03:24901"
loose-group_replication_bootstrap_group= off
loose-group_replication_single_primary_mode=FALSE
loose-group_replication_enforce_update_everywhere_checks= TRUE

In the parameter configuration, except the following parameters are different in each node, other configurations are the same: server_id, loose-group_replication_local_address

4. Start the first node

/usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf

5. Log in to the first node

mysql -h127.0.0.1 -P3306 -uroot --skip-password
#Change the default password after login
SET PASSWORD = PASSWORD('root');
flush privileges;

6. Create the users required for group replication

SET SQL_LOG_BIN=0;
CREATE USER rpl_user@'%';
GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%' IDENTIFIED BY 'rpl_pass';
FLUSH PRIVILEGES;
SET SQL_LOG_BIN=1;
CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='rpl_pass' FOR CHANNEL 'group_replication_recovery';

7. Install the group replication plugin

mysql> INSTALL PLUGIN group_replication SONAME 'group_replication.so';
Query OK, 0 rows affected (0.05 sec)
mysql> SHOW PLUGINS;
+----------------------------+----------+--------------------+
| Name                       | Status   | Type               |
+----------------------------+----------+--------------------+
| binlog                     | ACTIVE   | STORAGE ENGINE     |
...
| group_replication          | ACTIVE   | GROUP REPLICATION  |
+----------------------------+----------+--------------------+
45 rows in set (0.02 sec)

8. Start group replication

SET GLOBAL group_replication_bootstrap_group=ON;
START GROUP_REPLICATION;
SET GLOBAL group_replication_bootstrap_group=OFF;
#Check if group replication is started successfully
SELECT * FROM performance_schema.replication_group_members;

9、配置第二个节点（仅列出和s1的不同之处）

server_id=2
loose-group_replication_local_address= "db2:24901"

10、启动第二个节点（实例）

/usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf

11、登录第二个节点并修改默认密码

mysql -h127.0.0.1 -P3306 -uroot --skip-password
SET PASSWORD = PASSWORD('root');
flush privileges;

12、配置group replication需要的用户

SET SQL_LOG_BIN=0;
CREATE USER rpl_user@'%';
GRANT REPLICATION SLAVE ON *.* TO rpl_user@'%' IDENTIFIED BY 'rpl_pass';
FLUSH PRIVILEGES;
SET SQL_LOG_BIN=1;
CHANGE MASTER TO MASTER_USER='rpl_user', MASTER_PASSWORD='rpl_pass' FOR CHANNEL 'group_replication_recovery';

13、安装group replication插件

INSTALL PLUGIN group_replication SONAME 'group_replication.so';
Show plugins;
+----------------------------+----------+--------------------+
| Name                       | Status   | Type               |
+----------------------------+----------+--------------------+
| binlog                     | ACTIVE   | STORAGE ENGINE     |
...
| group_replication          | ACTIVE   | GROUP REPLICATION  |
+----------------------------+----------+--------------------+
45 rows in set (0.02 sec)

14、将s2添加到组中

set global group_replication_allow_local_disjoint_gtids_join=ON;
start group_replication;
#查看改group replication情况
SELECT * FROM performance_schema.replication_group_members;

15、添加第三个节点

#操作同第二个节点，my.cnf的参数略有不同
#添加完成查看各节点的运行状态
SELECT * FROM performance_schema.replication_group_members;

16、主从模式（single-primary）下的配置

主从（单主）模式的相关配置除了下面两个配置外，其他和多主都相同

loose-group_replication_single_primary_mode=TRUE
loose-group_replication_enforce_update_everywhere_checks=FALSE

17、主从下查看primary_member

SELECT VARIABLE_VALUE FROM performance_schema.global_status WHERE VARIABLE_NAME= 'group_replication_primary_member';

18、mysql在java中的连接配置

多主模式：loadbalance
jdbc.url=jdbc:mysql:loadbalance://172.16.90.39:3306,172.16.90.40:3306,172.16.90.41:3306/ifaes_test?loadBalanceBlacklistTimeout=5000&useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true
主从模式:replication
jdbc.url=jdbc:mysql:replication://172.16.90.39:3306,172.16.90.40:3306,172.16.90.41:3306/ifaes_test?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true

MySQL Group Replication multi-machine multi-instance installation configuration

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