Open Telekom Cloud will upgrade from the Juno to the Mitaka release – another significant milestone to further improve the stability and performance of the OpenStack platform for you. The Open Telekom Cloud team will implement this major upgrade on December 18th between 1:00 and 4:45 am (CET). We will do so with the utmost accuracy and the highest management attention. Unfortunately, such a major upgrade will cause some service interruptions, since we need to shut down all resources in availability zone 2. The web interface, API, and virtual resources will not be available several times for some minutes. During the maintenance window on December 18th, only resources and services running in availability zone 2 (EU-DE-02), Magdeburg will be affected by this upgrade.