|Upgrading CloudBees CD versions between 5.x and 8.2 that are using the built-in (default) database is not supported. This means that you must switch to an alternate CloudBees CD-supported database before your upgrade. For instructions, see Switching to an alternate database.|
|Clustered environment||Link to the upgrade process steps|
For a detailed description, see the KBEC-00041 - CloudBees CD TCP port usage-diagram and descriptions KB article.