Stein Series Release Notes


Upgrade Notes

  • To fix bug: 2004933 oslo.messaging notification queues are now renamed and created with amqp_auto_delete=true. When upgrading the agent old queues should be deleted to free up message broker resources. Previous queue that can be deleted are named There may also be queues with uuid of previous agent instances as name, these can also safely be deleted. (Look in the agent logs for relevant agent uuids).

    On rabbitmq queues can be deleted via the web console. For example with curl:

    curl -i -u username:password \
      -H "content-type:application/json" -XDELETE \

    Another example with vhost: ‘/’ deleting the queue:

    curl -i -u username:password \
      -H "content-type:application/json" \
      -XDELETE \


    In the example above the vhost is /. To ensure the vhost is correctly encoded the use of %2F, instead of / is required.

Bug Fixes

  • Fixes an issue where old oslo.messaging notification pool queues remained in the broker without any consumer after agent restart. The notification queues will now be created with amqp_auto_delete=true. See bug: 2004933.

  • Fixes an issue causing heavy RAM (and/or-storage) usage on the message broker back-end. The ironic-neutron-agent uses oslo.messaging notifications, with all notification listeners using pools. Since all listeneres are using pools the default notification queue in messaging is not consumed (only the pool queues are consumed). The default notification queue was continously growing, consuming more and more resources on the messaging back-end. See oslo.messaging bug: 1814544 and bug: 2004938 for more details.