1. 规划

 

 

 

2.设置mysql启动参数

#关于group replication 一些参数

master_info_repository = TABLE
relay_log_info_repository = TABLE
relay_log_recovery=1
gtid_mode = on
enforce_gtid_consistency = 1
log_slave_updates = ON
server_id=1    #第一个节点是1 ，第二个节点是2 ......

transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="09440083-2b74-11ea-838b-549f3510fe78"
loose-group_replication_start_on_boot=off
loose-group_replication_local_address="172.18.12.2:23306"
loose-group_replication_group_seeds="172.17.12.2:23306,172.17.12.3:23306,172.17.12.4:23306,172.17.12.5:23306,172.17.12.6:23306"
loose-grup_replication_bootstrap_group=off

 

3.初始化：

mysqld --initialize

4.第一个节点启动

mysqld --defaults-file=/etc/my.cnf &

 

 

 set sql_log_bin=0;

create user 'rpl_user'@'%';

root@localhost 03:05:  [(none)]> grant replication slave on *.* to rpl_user@'%' identified by '123456';

set sql_log_bin=1;

 

 

root@localhost 03:07:  [(none)]> change master to master_user='rpl_user', master_password='123456' FOR CHANNEL  'group-replication_recovery';

 

 

安装group_replication插件

install plugin group_replication soname 'group_replication.so';
show plugins;

 

 

查看group相关参数

root@localhost 03:11:  [(none)]> show global variables  like '%group%';

 

 

设置第一个节点启动为on

 set global group_replication_bootstrap_group=on;

 

启动mgr

start group_replication;

 

 

查看是否加入到组中

select * from performance_schema.replication_group_members;