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openstack-manuals/doc/install-guide/source/environment-messaging-ubuntu.rst
Dmitriy Chubinidze 121f42e246 docs: increasing file descriptor limit 
When installing RabbitMQ, in some cases it is necessary to
increase the file descriptor limit to ensure stable operations.

Change-Id: I2791e6786bb55868073968321fd857d4fab8a960
2025-03-11 23:08:43 +00:00

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Message queue for Ubuntu

OpenStack uses a message queue to coordinate operations and status information among services. The message queue service typically runs on the controller node. OpenStack supports several message queue services including RabbitMQ and Qpid. However, most distributions that package OpenStack support a particular message queue service. This guide implements the RabbitMQ message queue service because most distributions support it. If you prefer to implement a different message queue service, consult the documentation associated with it.

The message queue runs on the controller node.

Install and configure components

  1. Install the package:

    # apt install rabbitmq-server

  2. Add the openstack user:

    # rabbitmqctl add_user openstack RABBIT_PASS

Creating user "openstack" ...

    Replace RABBIT_PASS with a suitable password.

  3. Permit configuration, write, and read access for the openstack user:

    # rabbitmqctl set_permissions openstack ".*" ".*" ".*"

Setting permissions for user "openstack" in vhost "/" ...

Note

Sometimes it's necessary to increase the file descriptor limit for RabbitMQ to handle a large number of connections properly.