7ce48d1161
That's one giant hole in our docs. Whoops. Change-Id: I8ac6f204dd3ebe424dfe4335a491b8c9df7d0cc4 Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
38 lines
1.4 KiB
ReStructuredText
38 lines
1.4 KiB
ReStructuredText
==================
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Availability zones
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==================
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Availability Zones are an end-user visible logical abstraction for partitioning
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a cloud without knowing the physical infrastructure. Availability zones can be
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used to partition a cloud on arbitrary factors, such as location (country,
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datacenter, rack), network layout and/or power source. Because of the
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flexibility, the names and purposes of availability zones can vary massively
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between clouds.
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In addition, other services, such as the :neutron-doc:`networking service <>`
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and the :cinder-doc:`block storage service <>`, also provide an availability
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zone feature. However, the implementation of these features differs vastly
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between these different services. Consult the documentation for these other
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services for more information on their implementation of this feature.
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.. tip::
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Server Groups provide another mechanism for configuring the colocation of
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instances during scheduling. For more information, refer to
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:doc:`/user/server-groups`.
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Usage
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-----
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Availability zones can only be created and configured by an admin but they can
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be used by an end-user when creating an instance. For example:
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.. code-block:: console
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$ openstack server create --availability-zone ZONE ... SERVER
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It is also possible to specify a destination host and/or node using this
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command; however, this is an admin-only operation by default. For more
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information, see :ref:`using-availability-zones-to-select-hosts`.
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