MySQL 5.7 GR Single Primary测试

1、查看组复制状态和查找主节点

[root@localhost][(none)]> select *fromperformance_schema.replication_group_members;+---------------------------+--------------------------------------+-------------+-------------+--------------+| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE |+---------------------------+--------------------------------------+-------------+-------------+--------------+| group_replication_applier |3ac20522-27d6-11e8-8b41-080027049941| gr2        |3306| ONLINE      || group_replication_applier |56ba1eb1-27d6-11e8-8c74-08002750f3b8 | gr3        |3306| ONLINE      || group_replication_applier |783e5b4c-27d4-11e8-ba62-080027a663f9 | gr1        |3306| ONLINE      |+---------------------------+--------------------------------------+-------------+-------------+--------------+3rowsinset (0.00sec)[root@localhost][(none)]> select *fromperformance_schema.global_status where VARIABLE_NAME='group_replication_primary_member';+----------------------------------+--------------------------------------+| VARIABLE_NAME                    | VARIABLE_VALUE                      |+----------------------------------+--------------------------------------+| group_replication_primary_member |783e5b4c-27d4-11e8-ba62-080027a663f9 |+----------------------------------+--------------------------------------+1rowinset (0.00sec)

可以通过上面的SQL查找出成员gr1是RW节点，即主节点。

2、单主写入测试

gr1节点：在主节点上创建数据库和表，并且插入数据

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