I've three servers with Debian 9, Maria 10.1 and running a Galera
cluster.
We're upgrading the hardware by getting three new servers. They will
have Debian 10 and Maria 10.3.
What are my options for accomplishing this with minimal service
downtime?
One option I can think of
Using a mysqldump snapshot, set up Maria on one of the new servers to
replicate as an asyncronous slave from one node of the existing
cluster.Set up Maria on the two remaining new servers in a cluster with
that async slave.When all looks good, migrate workload to the new
cluster.
Does that seem reasonable?
Tom
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