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charm-deployment-guide
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Merge "Clarify Neutron AZ"

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Zuul 2021-09-10 14:06:24 +00:00 committed by Gerrit Code Review
parent 6b6fadf25d 07ad8b6728
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16
deploy-guide/source/app-ha.rst
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@ -77,7 +77,7 @@ the corresponding MAAS node's zone (AZ column).
make extensive use of the placement directive in combination with bundles
(and possibly bundle overlays).
Availability zones
Availability Zones
~~~~~~~~~~~~~~~~~~
The term "availability zone" can take on different meanings depending on the
@ -104,9 +104,8 @@ zone awareness to a unit, however both the backing cloud and the charm need to
support it. For the purposes of this document, this variable associates a MAAS
zone with a unit at deploy time.
This feature is available to the `neutron-gateway`_, `nova-compute`_, and
`ceph-osd`_ charms and is enabled via configuration option
``customize-failure-domain`` (details below).
This feature is enabled via configuration option ``customize-failure-domain``
for the charms that support it.
Neutron AZ
^^^^^^^^^^
@ -124,6 +123,14 @@ client-specified AZ during router/network creation, the Neutron agents will be
distributed amongst the zones. When 'true', and MAAS is the backing cloud, this
option overrides option ``default-availability-zone``.
These options also affect the `neutron-openvswitch`_ subordinate charm as AZ
information is passed over the relation it forms with the nova-compute charm.
This is useful for Neutron agent scheduling.
.. note::
The OVN charms do not currently support the configuration of Neutron AZs.
Nova AZ
^^^^^^^
@ -799,6 +806,7 @@ Charms`_ project group.
.. _ceph-osd charm README: https://opendev.org/openstack/charm-ceph-osd/src/branch/master/README.md
.. _ceph-mon: https://jaas.ai/ceph-mon
.. _ceph-osd: https://jaas.ai/ceph-osd
.. _neutron-openvswitch: https://jaas.ai/neutron-openvswitch
.. _nova-compute: https://jaas.ai/nova-compute
.. _neutron-gateway: https://jaas.ai/neutron-gateway
.. _swift-proxy: https://jaas.ai/swift-proxy