Hi,
Does Galera support rolling upgrades between multiple major versions? I
will be upgrading my Galera cluster from MariaDB 10.3.34 to 10.6.x. It'd
save a lot of time to jump straight from 10.3 to 10.6 instead of
upgrading 10.3 -> 10.4 -> 10.5 -> 10.6.
The documentation at
https://mariadb.com/kb/en/upgrading-from-mariadb-103-to-mariadb-104-with-galera-cluster/
implies that the MariaDB version is irrelevant, and only the Galera
version matters.
Next, make sure that the Galera version numbers are compatible.
If you are upgrading from the most recent MariaDB 10.3 release to
MariaDB 10.4, then the versions will
be compatible. MariaDB 10.3 uses Galera 3 (i.e. Galera wsrep provider
versions 25.3.x), and MariaDB
10.4 uses Galera 4 (i.e. Galera wsrep provider versions 26.4.x). This
means that upgrading to MariaDB
10.4 also upgrades the system to Galera 4. However, Galera 3 and Galera
4 should be compatible for the
purposes of a rolling upgrade, as long as you are using Galera 26.4.2
or later.
--
With kind regards,
William Edwards
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