Merge "Add section for feature supportability"
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@ -13,6 +13,7 @@ deployments with loose coupling between OpenStack services.
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find-us
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deployment
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openstack-charms
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support-notes
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creating-charms
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how-to-contribute
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author-guides/index
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45
doc/source/support-notes.rst
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45
doc/source/support-notes.rst
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.. _support-notes:
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=============
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Support notes
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=============
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This page describes supportability aspects within the OpenStack Charms project.
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Cross model relations
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---------------------
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Juju relations that are added between applications that reside in separate Juju
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models are called `Cross model relations`_ (CMR). For a Charmed OpenStack
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deployment, CMR support must also be present in terms of the manner in which
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the charms are combined. The OpenStack Charms do not generically support CMR.
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.. important::
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It is recommended to exercise each new CMR scenario in a lab environment
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before committing to that topology in production.
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The current list of supported CMR scenarios with regard to OpenStack Charms is
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as follows:
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#. The keystone application in one model, related to the vault application in a
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second model.
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#. The ceph-mon application in one model, related to the ceph-rbd-mirror
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application in a second model. This scenario is documented in `Ceph RBD
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mirroring`_.
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#. A ceph-radosgw application in one model, related to another ceph-radosgw
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application in a second model. This scenario is documented in `Ceph RADOS
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Gateway multisite replication`_.
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Other scenarios may work but are currently not supported. Distinct development
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and testing efforts are required in order to qualify each unique CMR scenario.
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If you would like to help drive the development work towards implementing a
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supported CMR scenario file a Launchpad bug describing your use case. To assist
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in this effort kindly use the `cross-model`_ bug tag.
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.. LINKS
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.. _Cross model relations: https://juju.is/docs/cross-model-relations
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.. _cross-model: https://bugs.launchpad.net/bugs/+bugs?field.tag=cross-model
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.. _Ceph RBD Mirroring: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-ceph-rbd-mirror.html
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.. _Ceph RADOS Gateway Multisite replication: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-rgw-multisite.html
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