openstack-manuals/doc/install-guide/source/environment-messaging-obs.rst

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Message queue for SUSE
~~~~~~~~~~~~~~~~~~~~~~
OpenStack uses a :term:`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 <https://www.rabbitmq.com>`__,
`Qpid <https://qpid.apache.org>`__, and `ZeroMQ <http://zeromq.org>`__.
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:
.. code-block:: console
# zypper install rabbitmq-server
2. Start the message queue service and configure it to start when the
system boots:
.. code-block:: console
# systemctl enable rabbitmq-server.service
# systemctl start rabbitmq-server.service
3. Add the ``openstack`` user:
.. code-block:: console
# rabbitmqctl add_user openstack RABBIT_PASS
Creating user "openstack" ...
Replace ``RABBIT_PASS`` with a suitable password.
4. Permit configuration, write, and read access for the
``openstack`` user:
.. code-block:: console
# rabbitmqctl set_permissions openstack ".*" ".*" ".*"
Setting permissions for user "openstack" in vhost "/" ...