Tim Gross cff3c9b874 replication: fix potential panic during upgrades (#17476) ...

If the authoritative region has been upgraded to a version of Nomad that has new
replicated objects (such as ACL Auth Methods, ACL Binding Rules, etc.), the
non-authoritative regions will start replicating those objects as soon as their
leader is upgraded. If a server in the non-authoritative region is upgraded and
then becomes the leader before all the other servers in the region have been
upgraded, then it will attempt to write a Raft log entry that the followers
don't understand. The followers will then panic.

Add same the minimum version checks that we do for RPC writes to the leader's
replication loop.

2023-06-12 08:53:56 -04:00

157 B

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