openstack/kolla-ansible
Code Issues Proposed changes

Fix nova deployment failure when rabbitmq is disabled

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Nova always tries to create the rabbitmq user regardless of
whether RabbitMQ is enabled or not.
This ps also adds an external rabbitmq doc.

Change-Id: Iec517226e4c82ea351889b55689a3efceaadcc76
This commit is contained in:
wu.chunyang 2021-07-07 23:33:11 +08:00
parent cccae8a654
commit 24d08142d2
3 changed files with 57 additions and 1 deletions
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4
ansible/roles/nova-cell/tasks/rabbitmq.yml
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@ -24,4 +24,6 @@
- nova_cell_rpc_group_name != nova_cell_notify_group_name or
nova_cell_rpc_rabbitmq_users != nova_cell_notify_rabbitmq_users
when: nova_cell_rpc_transport == 'rabbit'
when:
- nova_cell_rpc_transport == 'rabbit'
- enable_rabbitmq | bool

53
doc/source/reference/message-queues/external-rabbitmq-guide.rst Normal file
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@ -0,0 +1,53 @@
.. _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.

1
doc/source/reference/message-queues/index.rst
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@ -8,3 +8,4 @@ This section describes configuration of message queue services.
:maxdepth: 1
rabbitmq
external-rabbitmq-guide