We are running kolla-ansible Train and I successfully followed the recommendations in [1] to change our RMQ settings, and our RMQ works a lot better now, but one of the recommendations is to run RMQ 3.8 and so far I haven’t been able to make it work. Our working RMQ container has these settings in the Dockerfile to force 3.7 and the appropriate erlang version: 'erlang-21.3*', 'rabbitmq-server-3.7.23*' I changed those settings to allow 3.8: 'rabbitmq-server-3.*.*el8ost*' Now my RMQ container fails to start with: {"log":"20:29:28.440 [error] Supervisor rabbit_prelaunch_sup had child prelaunch started with rabbit_prelaunch:run_prelaunch_first_phase() at undefined exit with reason no_configuration_schema_found in context start_error\r\n","stream":"stdout","time":"2022-02-22T20:29:28.441064637Z"} What am I missing? [1] https://wiki.openstack.org/wiki/Large_Scale_Configuration_Rabbit