my.cnf
[mysql]
prompt='node2 [h] {u} (d) > '
#
[client]
user = sa
password = cc.123
port = 22113
socket = /tmp/mysql_sandbox22113.sock
[mysqld]
user = root
port = 22113
socket = /tmp/mysql_sandbox22113.sock
basedir = /usr/local/8.0.11
datadir = /home/data/group_sp_msb_8_0_11/node2/data
tmpdir = /home/data/group_sp_msb_8_0_11/node2/tmp
pid-file = /home/data/group_sp_msb_8_0_11/node2/data/mysql_sandbox22113.pid
bind-address = 0.0.0.0
report-port=22113
log-error=msandbox.err
server-id=200
relay-log-index=mysql-relay
relay-log=mysql-relay
log-bin=mysql-bin
log-error=msandbox.err
binlog_checksum=NONE
log_slave_updates=ON
plugin-load=group_replication.so
group_replication=FORCE_PLUS_PERMANENT
group_replication_start_on_boot=OFF
group_replication_bootstrap_group=OFF
transaction_write_set_extraction=XXHASH64
report-host=127.0.0.1
loose-group_replication_group_name="aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"
loose-group-replication-single-primary-mode=on
master-info-repository=table
relay-log-info-repository=table
gtid_mode=ON
log-slave-updates
enforce-gtid-consistency
loose-group-replication-local-address=127.0.0.1:22238
loose-group-replication-group-seeds=127.0.0.1:22237,127.0.0.1:22238,127.0.0.1:22239,127.0.0.1:22240
mysqlx-port=32113
mysqlx-socket=/tmp/mysqlx-32113.sock
关于MGR相关参数说明 transaction_write_set_extraction #记录事务的算法 group_replication_start_on_boot #是否随服务器启动而自动启动组复制 group_replication_bootstrap_group #引导组成员的组，这个用于第一次搭建MGR跟重新搭建MGR的时候使用 group_replication_group_name #此GROUP的名字，必须是一个有效的UUID，以此来区分整个内网里边的各个不的GROUP group_replication_local_address #本地的IP地址字符串，host:port group_replication_group_seeds #需要接受本实例的信息服务器IP地址字符串 group_replication_single_primary_mode #是否启动单主模式，如果启动，则本实例是主库，提供读写，其他实例仅提供读 group_replication_enforce_update_everywhere_checks #多主模式下，强制检查每一个实例是否允许该操作
loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa" #集群名称 loose-group_replication_start_on_boot=off #是否随着服务启动集群 loose-group_replication_local_address= "127.0.0.1:3011" #集群本机端口，和服务端口不同 loose-group_replication_group_seeds= "127.0.0.1:3013,127.0.0.1:3012,127.0.0.1:3011" #集群包含的所有节点 loose-group_replication_bootstrap_group= off #是否设置为主节点，当创建集群时其他加入的节点都以该节点为目标加入集群
PRIMARY MEMBER_ROLE
change master to
master_user='rpl_user',
master_password='123456'
for channel 'group_replication_recovery';
-- install plugin group_replication soname 'group_replication.so';
set global group_replication_bootstrap_group=on;
start group_replication;
set global group_replication_bootstrap_group=off;
其他节点
change master to
master_user='rpl_user',
master_password='123456'
for channel 'group_replication_recovery';
-- install plugin group_replication soname 'group_replication.so';
#非seed结点直接start group_replication 就行
start group_replication;
下图来自MySQL官方
