Hello all, first of all thank you very much for this stable virtualization environment. It has been a pillar for our company’s business for more than 5 years now and after migrating from version 3 to 4 it has been so stable ever since. Anyway, I ran into a problem I cannot fix on my own yesterday: After a lot of consideration and hesitation since this is a production environment I followed the upgrade guide (https://www.ovirt.org/documentation/upgrade_guide/ <https://www.ovirt.org/documentation/upgrade_guide/>), configured a vanilla CentOS 8 server as controller, decommissioned the old 4.3 controller and fired up the new one. It worked like a charm until I tried to migrate VMs, start new ones or even create new disks. We use Ceph as managed storage, providing a SSD only and a HDD only pool. The UI simply told me that there was an error. I started investigating the issue and found corresponding log entries in ovirt-engine.log: 2021-03-22 10:36:37,247+01 ERROR [org.ovirt.engine.core.common.utils.cinderlib.CinderlibExecutor] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-24) [67bf193c] cinderlib execution failed: But that was all the engine had to say about the issue. There was no stack trace or additional information. There is no logfile in /var/log/ovirt-engine/cinderlib/, the directory simply is empty while on the other controller it was frequently filed with annoying „already mounted“ messages. Can anyone help me with that issue? I searched the web for a solution or someone else with the same problem, but came up empty. Is there a way to turn up the log level for cinderlib? Are there any dependencies I have to install besides the ovirt packages? Any help is very much appreciated! Kind regards and stay healthy, Marc -- ________________________________________________________________________ Dipl.-Inform. Marc-Christian Schröer schroeer@ingenit.com Geschäftsführer / CEO ---------------------------------------------------------------------- ingenit GmbH & Co. KG Tel. +49 (0)231 58 698-120 Emil-Figge-Strasse 76-80 Fax. +49 (0)231 58 698-121 D-44227 Dortmund www.ingenit.com Registergericht: Amtsgericht Dortmund, HRA 13 914 Gesellschafter : Thomas Klute, Marc-Christian Schröer ________________________________________________________________________