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.. _external-rabbitmq-guide:
=================
External RabbitMQ
=================
Sometimes, for various reasons (Redundancy, organisational policies, etc.),
it might be necessary to use an external RabbitMQ cluster.
This use case can be achieved with the following steps:
Requirements
~~~~~~~~~~~~
* An existing RabbitMQ cluster, reachable from all of your
nodes.
Enabling External RabbitMQ support
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In order to enable external RabbitMQ support,
you will first need to disable RabbitMQ deployment,
by ensuring the following line exists within ``/etc/kolla/globals.yml`` :
.. code-block:: yaml
enable_rabbitmq: "no"
Overwriting transport_url within ``globals.yml``
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
When you use an external RabbitMQ cluster, you must overwrite
``*_transport_url`` within ``/etc/kolla/globals.yml``
.. code-block:: yaml
rpc_transport_url:
notify_transport_url:
nova_cell_rpc_transport_url:
nova_cell_notify_transport_url:
For example:
.. code-block:: yaml
rpc_transport_url: rabbit://openstack:6Y6Eh3blPXB1Qn4190JKxRoyVhTaFsY2k2V0DuIc@10.0.0.1:5672,openstack:6Y6Eh3blPXB1Qn4190JKxRoyVhTaFsY2k2V0DuIc@10.0.0.2:5672,openstack:6Y6Eh3blPXB1Qn4190JKxRoyVhTaFsY2k2V0DuIc@10.0.0.3:5672//
notify_transport_url: "{{ rpc_transport_url }}"
nova_cell_rpc_transport_url: rabbit://openstack:6Y6Eh3blPXB1Qn4190JKxRoyVhTaFsY2k2V0DuIc@10.0.0.1:5672//
nova_cell_notify_transport_url: "{{ nova_cell_rpc_transport_url }}"
.. note::
Ensure the rabbitmq user used in ``*_transport_url`` exists.