Merge "Revise interoperable image import documentation"
This commit is contained in:
Zuul
Gerrit Code Review
commit
7416aa989f
|
|
@ -16,12 +16,12 @@
|
|||
Interoperable Image Import
|
||||
==========================
|
||||
|
||||
The EXPERIMENTAL version 2.6 of the Image Service API introduces a Minimal
|
||||
Viable Product of the interoperable image import process described in the
|
||||
Glance design document `Image Import Refactor`_. The API calls available
|
||||
in the current implementation are described in the `Interoperable Image
|
||||
Import`_ section of the Image Service API reference. Here's how to configure
|
||||
Glance to enable the interoperable image import process.
|
||||
Version 2.6 of the Image Service API introduces new API calls that implement an
|
||||
interoperable image import process. These API calls, and the workflow for
|
||||
using them, are described in the `Interoperable Image Import`_ section of the
|
||||
`Image Service API reference`_. That documentation explains the end user's
|
||||
view of interoperable image import. In this section, we discuss what
|
||||
configuration options are available to operators.
|
||||
|
||||
The interoperable image import process uses Glance tasks, but does *not*
|
||||
require that the Tasks API be exposed to end users. Further, it requires
|
||||
|
|
@ -39,17 +39,36 @@ be set:
|
|||
descriptions in the sample **glance-api.conf** file to see what
|
||||
options are available.
|
||||
|
||||
.. note::
|
||||
You can find an example glance-api.conf_ file in the **etc/**
|
||||
subdirectory of the Glance source code tree. Make sure that you are
|
||||
looking in the correct branch for the OpenStack release you are working
|
||||
with.
|
||||
|
||||
* in the default options group:
|
||||
|
||||
* ``enable_image_import`` must be set to **True** (the default is
|
||||
False). When False, the **/versions** API response does not
|
||||
include the v2.6 API and calls to the import URIs will behave
|
||||
like they do in v2.5, that is, they'll return a 404 response.
|
||||
* ``enable_image_import`` must be either absent or set to **True** (the
|
||||
default).
|
||||
|
||||
.. note ::
|
||||
In the Pike release, the default value for this option was **False**.
|
||||
This option is DEPRECATED and will be removed in the Rocky release.
|
||||
|
||||
If ``enable_image_import`` is set **False**, requests to the v2 endpoint
|
||||
for URIs defined only in v2.6 will return 404 (Not Found) with a message in
|
||||
the response body stating "Image import is not supported at this site."
|
||||
Additionally, the image-create response will not contain the
|
||||
"OpenStack-image-import-methods" header.
|
||||
|
||||
* ``node_staging_uri`` must specify a location writable by the glance
|
||||
user. If you have multiple Glance API nodes, this should be a
|
||||
reference to a shared filesystem available to all the nodes.
|
||||
|
||||
* ``enabled_import_methods`` must specify the import methods you are exposing
|
||||
at your installation. The default value for this setting is
|
||||
``['glance-direct','web-download']``. See the next section for a
|
||||
description of these import methods.
|
||||
|
||||
Additionally, your policies must be such that an ordinary end user
|
||||
can manipulate tasks. In releases prior to Pike, we recommended that
|
||||
the task-related policies be admin-only so that end users could not
|
||||
|
|
@ -71,16 +90,61 @@ Image Import Methods
|
|||
--------------------
|
||||
|
||||
Glance provides two import methods that you can make available to your
|
||||
users: ``glance-direct`` and ``web-download``.
|
||||
users: ``glance-direct`` and ``web-download``. By default, both methods
|
||||
are enabled.
|
||||
|
||||
.. TODO(rosmaita): quick description of what they are
|
||||
* The ``glance-direct`` import method allows your users to upload image data
|
||||
directly to Glance.
|
||||
|
||||
* The ``web-download`` method allows an end user to import an image from a
|
||||
remote URL. The image data is retrieved from the URL and stored in the
|
||||
Glance backend. (In other words, this is a *copy-from* operation.)
|
||||
|
||||
.. note::
|
||||
The ``web-download`` import method replaces the copy-from functionality
|
||||
that was available in the Image API v1 but previously absent from v2.
|
||||
This note is a gentle reminder that the Image API v1 is DEPRECATED and
|
||||
will be removed from Glance during the Rocky development cycle. The
|
||||
Queens release of Glance (16.x.x) is the final version in which you can
|
||||
expect to find the Image API v1.
|
||||
|
||||
You control which methods are available to API users by the
|
||||
``enabled_import_methods`` configuration option in the default section of the
|
||||
**glance-api.conf** file.
|
||||
|
||||
Configuring the glance-direct method
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
For the ``glance-direct`` method, make sure that ``glance-direct`` is included
|
||||
in the list specified by your ``enabled_import_methods`` setting, and that all
|
||||
the options described above are set properly.
|
||||
|
||||
Configuring the web-download method
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
To enable the ``web-download`` import method, make sure that it is included in
|
||||
the list of methods in the ``enabled_import_methods`` option, and that all the
|
||||
options described above are set properly.
|
||||
|
||||
.. note::
|
||||
You must configure the ``node_staging_uri`` for the ``web-download`` import
|
||||
method because that is where Glance will store the downloaded content.
|
||||
This gives you the opportunity to have the image data be processed by the
|
||||
same plugin chain for each of the import methods. See :ref:`iir_plugins`
|
||||
for more information.
|
||||
|
||||
Additionally, you have the following configuration available.
|
||||
|
||||
Depending on the nature of your cloud and the sophistication of your users,
|
||||
you may wish to restrict what URIs they may use for the web-download import
|
||||
method. You can do this by configuring options in the
|
||||
method.
|
||||
|
||||
.. note::
|
||||
You should be aware of OSSN-0078_, "copy_from in Image Service API v1 allows
|
||||
network port scan". The v1 copy_from feature does not have the
|
||||
configurability described here.
|
||||
|
||||
You can do this by configuring options in the
|
||||
``[import_filtering_opts]`` section of the **glance-image-import.conf** file.
|
||||
|
||||
.. note::
|
||||
|
|
@ -92,8 +156,6 @@ method. You can do this by configuring options in the
|
|||
you are looking in the correct branch for the OpenStack release you are
|
||||
working with.
|
||||
|
||||
.. _glance-image-import.conf.sample: http://git.openstack.org/cgit/openstack/glance/tree/etc/glance-image-import.conf.sample
|
||||
|
||||
You can whitelist ("allow *only* these") or blacklist ("do *not* allow these")
|
||||
at three levels:
|
||||
|
||||
|
|
@ -153,6 +215,14 @@ using the http or https scheme. The only ports users will be able to specify
|
|||
are 80 and 443. (Users do not have to specify a port, but if they do, it must
|
||||
be either 80 or 443.)
|
||||
|
||||
.. note::
|
||||
The **glance-image-import.conf** is an optional file. You can find an
|
||||
example file named glance-image-import.conf.sample_ in the **etc/**
|
||||
subdirectory of the Glance source code tree. Make sure that you are looking
|
||||
in the correct branch for the OpenStack release you are working with.
|
||||
|
||||
.. _iir_plugins:
|
||||
|
||||
Customizing the image import process
|
||||
------------------------------------
|
||||
|
||||
|
|
@ -208,12 +278,6 @@ one of the plugin names in the list providing the value for the
|
|||
``image_import_plugins`` option. Plugins are executed in the order they are
|
||||
specified in this list.
|
||||
|
||||
.. _`Image Import Refactor`: https://specs.openstack.org/openstack/glance-specs/specs/mitaka/approved/image-import/image-import-refactor.html
|
||||
.. _`Interoperable Image Import`: https://developer.openstack.org/api-ref/image/v2/index.html#interoperable-image-import
|
||||
.. _`Stevedore`: https://docs.openstack.org/stevedore
|
||||
.. _`Taskflow`: https://docs.openstack.org/taskflow
|
||||
.. _`Taskflow "Task" object`: https://docs.openstack.org/taskflow/latest/user/atoms.html#task
|
||||
|
||||
The Image Property Injection Plugin
|
||||
-----------------------------------
|
||||
.. list-table::
|
||||
|
|
@ -313,4 +377,14 @@ required.
|
|||
See the :ref:`property-protections` section of this Guide for more
|
||||
information.
|
||||
|
||||
.. _glance-api.conf: http://git.openstack.org/cgit/openstack/glance/tree/etc/glance-api.conf
|
||||
.. _glance-image-import.conf.sample: http://git.openstack.org/cgit/openstack/glance/tree/etc/glance-image-import.conf.sample
|
||||
.. _`Image Import Refactor`: https://specs.openstack.org/openstack/glance-specs/specs/mitaka/approved/image-import/image-import-refactor.html
|
||||
.. _`Image Service API reference`: https://developer.openstack.org/api-ref/image/
|
||||
.. _`Inject metadata properties automatically to non-admin images`: https://specs.openstack.org/openstack/glance-specs/specs/queens/approved/glance/inject-automatic-metadata.html
|
||||
.. _`Interoperable Image Import`: https://developer.openstack.org/api-ref/image/v2/index.html#interoperable-image-import
|
||||
.. _OSSN-0078: https://wiki.openstack.org/wiki/OSSN/OSSN-0078
|
||||
.. _`Stevedore`: https://docs.openstack.org/stevedore
|
||||
.. _`Taskflow`: https://docs.openstack.org/taskflow
|
||||
.. _`Taskflow "Task" object`: https://docs.openstack.org/taskflow/latest/user/atoms.html#task
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue