UCS 5.2 Alpha released

UCS 5.2 Alpha has been released on our testing mirror.

You can test the alpha version of the upcoming UCS 5.2. New installations as well as updates from UCS 5.0 are possible.

Attention The alpha release is not covered by the support. It is meant to test and evaluate. You can use UCS 5.2 Alpha to test Apps, software compatibility and so on. All machines that run 5.2 Alpha at some point should be considered unsupported and “to-be-thrown-away”: We will not support any smooth package updates, not to a potential Beta release, certainly not to the official and final UCS 5.2 release.

See also our blog post UCS 5.2 Alpha: Preliminary version of the next UCS released

In order to install UCS 5.2 from scratch, you can use the following ISO image and follow our univention-system-setup as always:

In order to update from UCS 5.0-5 errata881 to UCS 5.2, you can do the following:

ucr set repository/online/server='https://updates-test.software-univention.de' repository/online/verify='no'

Note that we run a script before the actual upgrade is done. This may fail with error messages and hints how to fix them. E.g., you need to migrate to Keycloak. Please follow this link: 1. Introduction — Migration guide: SimpleSAMLPHP to Keycloak


  • During the installation (not upgrade), the Keycloak App will be installed in the background. This requires a working internet connection (configured in the dedicated page in our System setup)
  • Before upgrading from UCS 5.0, you need to install the Keycloak App. The only version available, that also supports UCS 5.2 is not released yet and still resides in the Test App Center. Until version 22.0.3-ucs2 is available in the production App Center, please do univention-install univention-appcenter-dev; univention-app dev-use-test-appcenter before installing Keycloak
  • The upgrade will require the very latest software version of UCS (UCS 5.0-5 errata881 at the time of writing). Via the command line tool univention-upgrade, you will see an upgrade to 5.0-6 and then to 5.1-0 and then to 5.2-0. This is intentional. The UMC module “Software updates” will not show 5.1-0.
  • The test mirror will be updated frequently. It may be that at this very moment, some development versions of the packages are broken and the upgrade will not work completely. Please bear with us while we will fix these errors. We should find them via our testing infrastructure. But if the problems persist, please notify us.
  • All UCS servers that upgrade from UCS 5.0 to UCS 5.2 should have set this UCR variable prior to the upgrade: ucr set ucs/server/sso/fqdn=ucs-sso-ng."$(ucr get domainname)"