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I have a MySQL 5.7 (5.7.19-17-57-log Percona XtraDB Cluster) cluster using Galera, but I am in the middle of upgrading to 8.0 -- 8.0.23-14 Percona Server (GPL), Release '14'. I wasn't sure if it was possible to join the 8.0 box to the clustered 5.7.

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  • Which flavour of MySQL is this? Percona? Or the one from Codership/Galera?
    – dbdemon
    May 25, 2021 at 11:30
  • Is it possible to join Server version: 8.0.23-14 Percona Server (GPL), Release '14' with a clustered version that is Server version: 5.7.19-17-57-log Percona XtraDB Cluster (GPL) May 25, 2021 at 12:18
  • Search percona.com and galeracluster.com/library/documentation. Then test it on 3 machines (3 VMs on a single machine should suffice; one could be a garbd). The likely issues are with the major differences between 5.7 and 8.0, together with how Galera deals with them.
    – Rick James
    May 25, 2021 at 18:38
  • And please report back on what you discover. (Consider self-Answering this Question.)
    – Rick James
    May 25, 2021 at 18:39
  • Ok i will look into this and if it doesn't work. No issues with updating the post. May 26, 2021 at 17:24

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It's not possible to make a Percona MySQL server 8.0 join a Percona XtraDB Cluster, regardless of version. The 8.0 server has to be Percona XtraDB, otherwise it won't have the necessary Galera libraries and bindings.

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  • Thank you for the answer. May 26, 2021 at 17:24

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