MySQL8.4组复制的实现步骤

mkdir -p /opt/mysql/10000/{data,log,tmp} 

vi /opt/mysql/10000/my.cnf
 
[mysql]
#设置mysql客户端默认编码
default-character-set=utf8
[mysqld]
port=10000
pid-file= /opt/mysql/10000/mysqld.pid
socket= /opt/mysql/10000/mysqld.sock
datadir= /opt/mysql/10000/data
log-error=/opt/mysql/10000/log/mysqld.log
tmpdir=/opt/mysql/10000/tmp
secure-file-priv= NULL
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
#服务器唯一ID，默认是1
server-id=10000
#启用二进制日志
log-bin=mysql-bin
#最大连接数
max_connections=1000
#设置默认时区
default-time_zone='+8:00'
# 0:区分大小写
# 1:不区分大小写
lower_case_table_names=1
user = mysql
#启用全局事务标识符（GTID）模式
gtid_mode=on
#强制GTID的一致性。这意味着在执行事务时，MySQL将确保所有涉及的服务器都使用相同的GTID集。
enforce_gtid_consistency=on

chown -R mysql:mysql /opt/mysql/10000
mysqld --defaults-file=/opt/mysql/10000/my.cnf --initialize

mysqld --defaults-file=/opt/mysql/10000/my.cnf &

#查看临时密码
cat /opt/mysql/10000/log/mysqld.log|grep "A temporary password"
#登录
mysql -uroot -p'EG+Pvd&jj0N=' --socket=/opt/mysql/10000/mysqld.sock
>ALTER USER 'root'@'localhost' identified by '123456';
  flush privileges;

mysql -uroot -p'123456' --socket=/opt/mysql/10000/mysqld.sock
 >CREATE USER 'repl'@'%' IDENTIFIED  BY '123456';
  GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%';
  flush privileges;

vi /opt/mysql/10000/my.cnf
#组复制设置
plugin_load_add='group_replication.so'
group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
group_replication_start_on_boot=off
group_replication_local_address= "192.168.221.100:33061"
group_replication_group_seeds= "192.168.221.100:33061,192.168.221.100:33062,192.168.221.100:33063"
group_replication_bootstrap_group=off
disabled_storage_engines="MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,MEMORY"

cp -rf /opt/mysql/10000 /opt/mysql/10001
sed -i "s#10000#10001#g" /opt/mysql/10001/my.cnf
rm -f /opt/mysql/10001/data/auto.cnf
sed -i  "s#group_replication_local_address= '192.168.221.100:33061'#group_replication_local_address= '192.168.221.100:33062'#g" /opt/mysql/10001/my.cnf
chown -R mysql:mysql /opt/mysql/10001
mysqld --defaults-file=/opt/mysql/10001/my.cnf &

cp -rf /opt/mysql/10000 /opt/mysql/10002
sed -i "s#10000#10002#g" /opt/mysql/10002/my.cnf
rm -f /opt/mysql/10002/data/auto.cnf
sed -i  "s#group_replication_local_address= '192.168.221.100:33061'#group_replication_local_address= '192.168.221.100:33063'#g" /opt/mysql/10002/my.cnf
chown -R mysql:mysql /opt/mysql/10002
mysqld --defaults-file=/opt/mysql/10002/my.cnf &

mysql -uroot -p'123456' --socket=/opt/mysql/10000/mysqld.sock
> set global group_replication_recovery_get_public_key=on;
  CHANGE REPLICATION SOURCE TO SOURCE_USER='repl', SOURCE_PASSWORD='123456' FOR CHANNEL 'group_replication_recovery';
  SET GLOBAL group_replication_bootstrap_group=ON;
  START GROUP_REPLICATION;
  SET GLOBAL group_replication_bootstrap_group=OFF;

mysql -uroot -p'123456' --socket=/opt/mysql/10001/mysqld.sock
> START GROUP_REPLICATION;

mysql -uroot -p'123456' --socket=/opt/mysql/10002/mysqld.sock
> START GROUP_REPLICATION;

mysql -uroot -p'123456' --socket=/opt/mysql/10000/mysqld.sock
> SELECT CHANNEL_NAME,MEMBER_ID,MEMBER_HOST,MEMBER_PORT, MEMBER_ROLE FROM performance_schema.replication_group_members;

mysql -uroot -p'123456' --socket=/opt/mysql/10000/mysqld.sock
> create database test;
   use test;
   create table test (id int,name varchar(10));
   ALTER TABLE test ADD PRIMARY KEY id(id);
   insert into test values(1,'a'),(2,'b'),(3,'c');

mysql -uroot -p'123456' --socket=/opt/mysql/10001/mysqld.sock
>  use test;
   select * from test;

mysql -uroot -p'123456' --socket=/opt/mysql/10002/mysqld.sock
>  use test;
   select * from test;

mysql -uroot -p'123456' --socket=/opt/mysql/10000/mysqld.sock
>  stop GROUP_REPLICATION;
set global group_replication_single_primary_mode=off;
set global group_replication_enforce_update_everywhere_checks=ON;
 
 
mysql -uroot -p'123456' --socket=/opt/mysql/10001/mysqld.sock
>  stop GROUP_REPLICATION;
set global group_replication_single_primary_mode=off;
set global group_replication_enforce_update_everywhere_checks=ON;
 
mysql -uroot -p'123456' --socket=/opt/mysql/10002/mysqld.sock
>  stop GROUP_REPLICATION;
set global group_replication_single_primary_mode=off;
set global group_replication_enforce_update_everywhere_checks=ON;

mysql -uroot -p'123456' --socket=/opt/mysql/10000/mysqld.sock
> SET GLOBAL group_replication_bootstrap_group=ON;
  START GROUP_REPLICATION;
  SET GLOBAL group_replication_bootstrap_group=OFF;

mysql -uroot -p'123456' --socket=/opt/mysql/10001/mysqld.sock
> START GROUP_REPLICATION;

mysql -uroot -p'123456' --socket=/opt/mysql/10002/mysqld.sock
> START GROUP_REPLICATION;

mysql -uroot -p'123456' --socket=/opt/mysql/10000/mysqld.sock
>  SELECT CHANNEL_NAME,MEMBER_ID,MEMBER_HOST,MEMBER_PORT, MEMBER_ROLE FROM performance_schema.replication_group_members;