MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0
Once server s1 has been configured and started, install the
Group Replication plugin. If you used
plugin_load_add='group_replication.so' in the
option file then the Group Replication plugin is installed and
you can proceed to the next step. In the event that you decide
to install the plugin manually, connect to the server and issue
the following:
INSTALL PLUGIN group_replication SONAME 'group_replication.so';
The mysql.session user must exist before
you can load Group Replication.
mysql.session was added in MySQL version
8.0.2. If your data dictionary was initialized using an
earlier version you must perform the MySQL upgrade procedure
(see Section 2.11, “Upgrading MySQL”). If the upgrade is not run,
Group Replication fails to start with the error message
There was an error when trying to access the server
with user: mysql.session@localhost. Make sure the user is
present in the server and that mysql_upgrade was ran after a
server update..
To check that the plugin was installed successfully, issue
SHOW PLUGINS; and check the output. It should
show something like this:
mysql> SHOW PLUGINS;
+----------------------------+----------+--------------------+----------------------+-------------+
| Name | Status | Type | Library | License |
+----------------------------+----------+--------------------+----------------------+-------------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | PROPRIETARY |
(...)
| group_replication | ACTIVE | GROUP REPLICATION | group_replication.so | PROPRIETARY |
+----------------------------+----------+--------------------+----------------------+-------------+