Merge pull request #10214 from hashicorp/watsonian/raft-protocol-upgrade-note

Flesh out Raft Protocol Support note
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Joel Watson 2021-05-10 13:20:35 -05:00 committed by GitHub
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@ -19,9 +19,12 @@ upgrade flow.
### Changes to Raft Protocol Support
Consul 1.8 supported Raft protocols 2 and 3. Consul 1.9.0 now only supports
Raft protocol 3 so before upgrading to Consul 1.9.0 users may have to first
upgrade to a previous release supporting both protocol versions and upgrade
the protocol in use to version 3.
Raft protocol 3. Consul has defaulted to using Raft protocol 3 since version 1.0.0,
so this should only impact users who have been using Consul prior to 1.0.0 and
may have the `raft_protocol` config setting set to 2. Users in that position
should upgrade to a previous release supporting both protocol versions and
update their configuration to use Raft protocol 3 before continuing their upgrade
to Consul 1.9.0.
### Changes to Configuration Defaults