This document describes the latest changes, enhancements, known issues, and fixes for Mirantis Kubernetes Engine (MKE) for v3.3.x.
Upgrading from MKE 3.3.x to MKE 3.4.x can result in minor MKE middleware downgrades. For more information, refer to the component version tables at the head of the release notes
In developing MKE 3.3.x, Mirantis has been transitioning from legacy Docker Hub-issued licenses to JWT licenses, as detailed below:
Versions 3.3.0 to 3.3.5: Docker Hub licenses only
Versions 3.3.6 to 3.3.11: Docker Hub licenses and JWT licenses
Versions 3.3.12 and later: JWT licenses only
Using a JWT license with an MKE instance that manages MCR causes the engine to log error messages, though MCR does not fail. This applies to MKE 3.3.12 and earlier. Applying a JWT license to MKE 3.3.0 through 3.3.5 causes the MKE web UI to fail until the license configuration is manually removed.