Add documentation for glance-download plugin
This patch adds documentation and API reference support for glance download plugin. Related blueprint glance-download-import Co-Authored-By: Victor Coutellier <victor.coutellier@gmail.com> Change-Id: Ie36232f3474d398a913025c8d408f08f879874d8
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Abhishek Kekane
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@ -18,11 +18,12 @@ the import methods available in the cloud in which you want to import
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an image. Each of these methods is well defined (which is what makes
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this process interoperable among different OpenStack clouds).
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Three import methods are defined:
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Four import methods are defined:
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* ``glance-direct``
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* ``web-download``
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* ``copy-image``
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* ``glance-download``
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.. note::
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@ -92,6 +93,17 @@ The ``copy-image`` workflow has **two** parts:
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the import process. You will specify that you are using the
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``copy-image`` import method in the body of the import call.
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The glance-download import method
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---------------------------------
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The ``glance-download`` workflow has **two** parts:
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1. Create an image record as described above.
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2. Issue the :ref:`Image Import <image-import-call>` call to complete
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the import process. You will specify that you are using the
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``glance-download`` import method in the body of the import call.
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.. _image-stage-call:
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Stage binary image data
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@ -183,6 +195,10 @@ service by being posted to an accessible location with a URL that you know.
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In the ``copy-image`` workflow, the data is made available to the Image
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service by copying existing image data to the staging area.
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In the ``glance-download`` workflow, the data is made available to the Image
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service by fetching an image accessible from another glance service specified
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by a region name and an image id that you know.
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Beginning with API version 2.8, an optional ``stores`` parameter may be added
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to the body request. When present, it contains the list of backing store
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identifiers to import the image binary data to. If at least one store
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@ -289,11 +305,22 @@ If you are using the ``copy-image`` import method:
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permission to copy unowned images. Consult your cloud's local
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documentation for details.
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If you are using the ``glance-download`` import method:
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- The image status must be ``queued``. (This indicates that no image data
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has yet been associated with the image.)
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- The body of your request must indicate that you are using the
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``glance-download`` import method, and it must contain the region name of the
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remote openstack region and the image id to fetch.
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You might optionaly set the service interface name (public by default) to
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request.
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**Synchronous Postconditions**
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- With correct permissions, you can see the image status as
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``importing`` (only for glance-direct and web-download import methods)
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through API calls. (Be aware, however, that if the import
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``importing`` (only for glance-direct, web-download and glance-download
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import methods) through API calls. (Be aware, however, that if the import
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process completes before you make the API call, the image may already
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show as ``active``.)
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@ -335,3 +362,9 @@ Request Example - copy-image import method
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.. literalinclude:: samples/image-import-c-i-request.json
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:language: json
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Request Example - glance-download import method
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-----------------------------------------------
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.. literalinclude:: samples/image-import-gd-request.json
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:language: json
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@ -0,0 +1,8 @@
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{
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"method": {
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"name": "glance-download",
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"glance_image_id": "c4705b36-b281-40f6-a01d-bf98883ead8e",
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"glance_region": "REGION2",
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"glance_service_interface": "public"
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}
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}
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@ -79,9 +79,9 @@ task-related policies:
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Image Import Methods
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--------------------
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Glance provides three import methods that you can make available to your
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users: ``glance-direct``, ``web-download`` and ``copy-image``. By default,
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all three methods are enabled.
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Glance provides four import methods that you can make available to your
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users: ``glance-direct``, ``web-download``, ``glance-download``, and
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``copy-image``. By default, all four methods are enabled.
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* The ``glance-direct`` import method allows your users to upload image data
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directly to Glance.
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@ -95,6 +95,10 @@ all three methods are enabled.
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that was available in the Image API v1 but previously absent from v2.
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Additionally, the Image API v1 was removed in Glance 17.0.0 (Rocky).
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* The ``glance-download`` method allows an end user to import an image from a
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remote glance. This import method is used to import an image from another
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openstack region which is federated by the same keystone.
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* The ``copy-image`` method allows and end user to copy existing image to
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other Glance backends available in deployment. This import method is
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only used if multiple glance backends are enabled in your deployment.
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@ -261,6 +265,43 @@ be either 80 or 443.)
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subdirectory of the Glance source code tree. Make sure that you are looking
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in the correct branch for the OpenStack release you are working with.
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Configuring the glance-download method
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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To enable the ``glance-download`` import method, make sure that it is included
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in the list of methods in the ``enabled_import_methods`` option, and that all
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the options described above are set properly.
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Additionally, you have the following configuration available.
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Depending your needs on image properties you may configure addional properties
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to be copied from the remote image to the local image.
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You can do this by configuring options in the
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``[glance_download_opts]`` section of the **glance-image-import.conf** file.
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``extra_properties`` options is a list of properties that should be copied from
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the remote image. The properties listed should be read as properties that
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"start with" as it allows you to set a namespace instead of explicitly listing
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each property of the namespace.
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Default values are :
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``['hw_', 'trait:', 'os_distro', 'os_secure_boot', 'os_type']``
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If you decide to set this option the default values will be totally ignored
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unless you explicitly set them.
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.. note::
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The ``extra_properties`` option will ignore namespaces reserved by glance,
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meaning that all the properties starting with ``os_glance`` won't be set
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on the local image.
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.. note::
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The **glance-image-import.conf** is an optional file. You can find an
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example file named glance-image-import.conf.sample in the **etc/**
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subdirectory of the Glance source code tree. Make sure that you are looking
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in the correct branch for the OpenStack release you are working with.
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Configuring the copy-image method
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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