how to restart MySQL MGR

检查MGR状态

SELECT * FROM performance_schema.replication_group_members;

关闭MGR,三个节点

STOP GROUP_REPLICATION;

启动MGR

主节点

SET GLOBAL group_replication_bootstrap_group=ON;
START GROUP_REPLICATION;
SET GLOBAL group_replication_bootstrap_group=OFF;

从节点

START GROUP_REPLICATION;