Topic
migration
Planned moves between versions and platforms: compatibility checks, rehearsal, cutover and rollback.
2 engineering notes.
- MySQL 8.0 is out of support: an upgrade probe for 8.4 LTSMySQL 8.0 reached end of life in April 2026. Three queries that find the accounts, plugins and replication state blocking an 8.4 upgrade.
- PostgreSQL 19 is a release candidate: what a Patroni upgrade should checkPostgreSQL 19 RC1 is out, RC2 lands 12 November and general availability is planned for 19 November 2026. A planning checklist for a Patroni-managed cluster.
Related service: Infrastructure & Cloud Migration →
