2ffeb0c7bb
With overriding hostname for QManager, related bug [1] was worked around meaning we can enable usage of QManager by default again, when quorum queues are used. [1] https://bugs.launchpad.net/oslo.messaging/+bug/2065922 Change-Id: I33a4f2ce910cb47db6b6fb510d6a4eb010325ea7
42 lines
2.1 KiB
YAML
42 lines
2.1 KiB
YAML
---
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prelude: >
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RabbitMQ Quorum Queues are enabled by default along with other significant
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improvements to oslo.messaging, like Queue Manager, Transient Queues to
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use Quorum, usage of Stream Queues for fanout. You can check more details
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for these options in `oslo.messaging release notes <https://docs.openstack.org/releasenotes/oslo.messaging/2024.1.html>`_
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features:
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- |
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Implemented new variables to control new oslo.messaging behaviour:
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- oslomsg_rabbit_stream_fanout: Enabled if ``oslomsg_rabbit_quorum_queues``
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is also set to `True`
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- oslomsg_rabbit_transient_quorum_queues: Enabled if ``oslomsg_rabbit_stream_fanout``
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is `True`
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- oslomsg_rabbit_qos_prefetch_count: Must be set to a positive value if
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``oslomsg_rabbit_stream_fanout`` is `True`
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- oslomsg_rabbit_queue_manager: Enabled if ``oslomsg_rabbit_quorum_queues``
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is also set to `True`
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Each service also has corresponsive variables prefixed with service name, like
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``<service>_oslomsg_rabbit_stream_fanout`` to control them separately.
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upgrade:
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- |
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With enablement of RabbitMQ Quorum Queues by default, all vhosts will
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be re-created and re-named without leading slash ('/'). For instance,
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`/nova` vhost will be renamed to `nova`. This might affect configured
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monitoring alert rules or statistics gathering.
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Renaming process will also lead for prolonged downtime of services
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during upgrade which will last from vhost renaming until service role
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execution completition. This might be especially important for services
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like Nova and Neutron where role runtime may take a while to cover all
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hosts.
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You can disable usage of Quorum Queues and use previous default of HA
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Queues by defining ``oslomsg_rabbit_quorum_queues: False`` in your
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user_variables.yml
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Please check `RabbitMQ maintenance <https://docs.openstack.org/openstack-ansible/latest/admin/maintenance-tasks.html#migrate-between-ha-and-quorum-queues>`_
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documentation for more infromation on how to switch between these 2 modes
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with reduced downtime.
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