This section explains how to upgrade a group replication setup. The basic process of upgrading members of a group is the same as upgrading stand-alone instances, see Section 2.11.1, “Upgrading MySQL” for the actual process of doing upgrade and types available. Choosing between an in-place or logical upgrade depends on the amount of data stored in the group. Usually an in-place upgrade is faster, and therefore is recommended. Due to the distributed nature of Group Replication, there are considerations such as what order to upgrade members of a group, which are described in this section. You should also consult Section 17.4.3, “Upgrading a Replication Setup”.
If your group can be taken fully offline see Section 18.6.1, “Group Replication Offline Upgrade”. If your group needs to remain online, as is common with production deployments, see Section 18.6.2, “Group Replication Online Upgrade” for the different approaches available for upgrading a group with minimal downtime.