openstack/deb-python-keystoneauth1
Code Issues Proposed changes

Add doc data back in. This will be replaced by real doc data.

Browse Source 
Change-Id: I59c11298a1d350a81a7298e9333da0c36e61a1a7
This commit is contained in:
Morgan Fainberg
2015-04-28 16:12:16 -04:00
parent faf52ea373
commit 49a223a370
12 changed files with 1376 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

90
doc/Makefile Normal file
View File

@@ -0,0 +1,90 @@
# Makefile for Sphinx documentation
#
# You can set these variables from the command line.
SPHINXOPTS =
SPHINXBUILD = sphinx-build
SPHINXSOURCE = source
PAPER =
BUILDDIR = build
# Internal variables.
PAPEROPT_a4 = -D latex_paper_size=a4
PAPEROPT_letter = -D latex_paper_size=letter
ALLSPHINXOPTS = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(SPHINXSOURCE)
.PHONY: help clean html dirhtml pickle json htmlhelp qthelp latex changes linkcheck doctest
help:
@echo "Please use \`make <target>' where <target> is one of"
@echo " html to make standalone HTML files"
@echo " dirhtml to make HTML files named index.html in directories"
@echo " pickle to make pickle files"
@echo " json to make JSON files"
@echo " htmlhelp to make HTML files and a HTML help project"
@echo " qthelp to make HTML files and a qthelp project"
@echo " latex to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
@echo " changes to make an overview of all changed/added/deprecated items"
@echo " linkcheck to check all external links for integrity"
@echo " doctest to run all doctests embedded in the documentation (if enabled)"
clean:
-rm -rf $(BUILDDIR)/*
html:
$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
@echo
@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
dirhtml:
$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
@echo
@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
pickle:
$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
@echo
@echo "Build finished; now you can process the pickle files."
json:
$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
@echo
@echo "Build finished; now you can process the JSON files."
htmlhelp:
$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
@echo
@echo "Build finished; now you can run HTML Help Workshop with the" \
".hhp project file in $(BUILDDIR)/htmlhelp."
qthelp:
$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
@echo
@echo "Build finished; now you can run "qcollectiongenerator" with the" \
".qhcp project file in $(BUILDDIR)/qthelp, like this:"
@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/python-keystoneclient.qhcp"
@echo "To view the help file:"
@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/python-keystoneclient.qhc"
latex:
$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
@echo
@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
@echo "Run \`make all-pdf' or \`make all-ps' in that directory to" \
"run these through (pdf)latex."
changes:
$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
@echo
@echo "The overview file is in $(BUILDDIR)/changes."
linkcheck:
$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
@echo
@echo "Link check complete; look for any errors in the above output " \
"or in $(BUILDDIR)/linkcheck/output.txt."
doctest:
$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
@echo "Testing of doctests in the sources finished, look at the " \
"results in $(BUILDDIR)/doctest/output.txt."

0
doc/ext/__init__.py Normal file
View File

46
doc/ext/apidoc.py Normal file
View File

@@ -0,0 +1,46 @@
# Copyright 2014 OpenStack Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# NOTE(blk-u): Uncomment the [pbr] section in setup.cfg and remove this
# Sphinx extension when https://launchpad.net/bugs/1260495 is fixed.
import os.path as path
from sphinx import apidoc
# NOTE(blk-u): pbr will run Sphinx multiple times when it generates
# documentation. Once for each builder. To run this extension we use the
# 'builder-inited' hook that fires at the beginning of a Sphinx build.
# We use ``run_already`` to make sure apidocs are only generated once
# even if Sphinx is run multiple times.
run_already = False
def run_apidoc(app):
global run_already
if run_already:
return
run_already = True
package_dir = path.abspath(path.join(app.srcdir, '..', '..',
'keystoneclient'))
source_dir = path.join(app.srcdir, 'api')
apidoc.main(['apidoc', package_dir, '-f',
'-H', 'keystoneclient Modules',
'-o', source_dir])
def setup(app):
app.connect('builder-inited', run_apidoc)

237
doc/source/authentication-plugins.rst Normal file
View File

@@ -0,0 +1,237 @@
======================
Authentication Plugins
======================
Introduction
============
Authentication plugins provide a generic means by which to extend the
authentication mechanisms known to OpenStack clients.
In the vast majority of cases the authentication plugins used will be those
written for use with the OpenStack Identity Service (Keystone), however this is
not the only possible case, and the mechanisms by which authentication plugins
are used and implemented should be generic enough to cover completely
customized authentication solutions.
The subset of authentication plugins intended for use with an OpenStack
Identity server (such as Keystone) are called Identity Plugins.
Available Plugins
=================
Keystoneclient ships with a number of plugins and particularly Identity
Plugins.
V2 Identity Plugins
-------------------
Standard V2 identity plugins are defined in the module:
:py:mod:`keystoneclient.auth.identity.v2`
They include:
- :py:class:`~keystoneclient.auth.identity.v2.Password`: Authenticate against
a V2 identity service using a username and password.
- :py:class:`~keystoneclient.auth.identity.v2.Token`: Authenticate against a
V2 identity service using an existing token.
V2 identity plugins must use an auth_url that points to the root of a V2
identity server URL, i.e.: `http://hostname:5000/v2.0`.
V3 Identity Plugins
-------------------
Standard V3 identity plugins are defined in the module
:py:mod:`keystoneclient.auth.identity.v3`.
V3 Identity plugins are slightly different from their V2 counterparts as a V3
authentication request can contain multiple authentication methods. To handle
this V3 defines a number of different
:py:class:`~keystoneclient.auth.identity.v3.AuthMethod` classes:
- :py:class:`~keystoneclient.auth.identity.v3.PasswordMethod`: Authenticate
against a V3 identity service using a username and password.
- :py:class:`~keystoneclient.auth.identity.v3.TokenMethod`: Authenticate against
a V2 identity service using an existing token.
The :py:class:`~keystoneclient.auth.identity.v3.AuthMethod` objects are then
passed to the :py:class:`~keystoneclient.auth.identity.v3.Auth` plugin::
>>> from keystoneclient import session
>>> from keystoneclient.auth.identity import v3
>>> password = v3.PasswordMethod(username='user',
... password='password')
>>> auth = v3.Auth(auth_url='http://my.keystone.com:5000/v3',
... auth_methods=[password],
... project_id='projectid')
>>> sess = session.Session(auth=auth)
As in the majority of cases you will only want to use one
:py:class:`~keystoneclient.auth.identity.v3.AuthMethod` there are also helper
authentication plugins for the various
:py:class:`~keystoneclient.auth.identity.v3.AuthMethod` which can be used more
like the V2 plugins:
- :py:class:`~keystoneclient.auth.identity.v3.Password`: Authenticate using
only a :py:class:`~keystoneclient.auth.identity.v3.PasswordMethod`.
- :py:class:`~keystoneclient.auth.identity.v3.Token`: Authenticate using only a
:py:class:`~keystoneclient.auth.identity.v3.TokenMethod`.
::
>>> auth = v3.Password(auth_url='http://my.keystone.com:5000/v3',
... username='username',
... password='password',
... project_id='projectid')
>>> sess = session.Session(auth=auth)
This will have exactly the same effect as using the single
:py:class:`~keystoneclient.auth.identity.v3.PasswordMethod` above.
V3 identity plugins must use an auth_url that points to the root of a V3
identity server URL, i.e.: `http://hostname:5000/v3`.
Version Independent Identity Plugins
------------------------------------
Standard version independent identity plugins are defined in the module
:py:mod:`keystoneclient.auth.identity.generic`.
For the cases of plugins that exist under both the identity V2 and V3 APIs
there is an abstraction to allow the plugin to determine which of the V2 and V3
APIs are supported by the server and use the most appropriate API.
These plugins are:
- :py:class:`~keystoneclient.auth.identity.generic.Password`: Authenticate
using a user/password against either v2 or v3 API.
- :py:class:`~keystoneclient.auth.identity.generic.Token`: Authenticate using
an existing token against either v2 or v3 API.
These plugins work by first querying the identity server to determine available
versions and so the `auth_url` used with the plugins should point to the base
URL of the identity server to use. If the `auth_url` points to either a V2 or
V3 endpoint it will restrict the plugin to only working with that version of
the API.
Simple Plugins
--------------
In addition to the Identity plugins a simple plugin that will always use the
same provided token and endpoint is available. This is useful in situations
where you have an ``ADMIN_TOKEN`` or in testing when you specifically know the
endpoint you want to communicate with.
It can be found at :py:class:`keystoneclient.auth.token_endpoint.Token`.
V3 OAuth 1.0a Plugins
---------------------
There also exists a plugin for OAuth 1.0a authentication. We provide a helper
authentication plugin at:
:py:class:`~keystoneclient.v3.contrib.oauth1.auth.OAuth`.
The plugin requires the OAuth consumer's key and secret, as well as the OAuth
access token's key and secret. For example::
>>> from keystoneclient.v3.contrib.oauth1 import auth
>>> from keystoneclient import session
>>> from keystoneclient.v3 import client
>>> a = auth.OAuth('http://my.keystone.com:5000/v3',
... consumer_key=consumer_id,
... consumer_secret=consumer_secret,
... access_key=access_token_key,
... access_secret=access_token_secret)
>>> s = session.Session(auth=a)
Loading Plugins by Name
=======================
In auth_token middleware and for some service to service communication it is
possible to specify a plugin to load via name. The authentication options that
are available are then specific to the plugin that you specified. Currently the
authentication plugins that are available in `keystoneclient` are:
- password: :py:class:`keystoneclient.auth.identity.generic.Password`
- token: :py:class:`keystoneclient.auth.identity.generic.Token`
- v2password: :py:class:`keystoneclient.auth.identity.v2.Password`
- v2token: :py:class:`keystoneclient.auth.identity.v2.Token`
- v3password: :py:class:`keystoneclient.auth.identity.v3.Password`
- v3token: :py:class:`keystoneclient.auth.identity.v3.Token`
Creating Authentication Plugins
===============================
Creating an Identity Plugin
---------------------------
If you have implemented a new authentication mechanism into the Identity
service then you will be able to reuse a lot of the infrastructure available
for the existing Identity mechanisms. As the V2 identity API is essentially
frozen, it is expected that new plugins are for the V3 API.
To implement a new V3 plugin that can be combined with others you should
implement the base :py:class:`keystoneclient.auth.identity.v3.AuthMethod` class
and implement the
:py:meth:`~keystoneclient.auth.identity.v3.AuthMethod.get_auth_data` function.
If your Plugin cannot be used in conjunction with existing
:py:class:`keystoneclient.auth.identity.v3.AuthMethod` then you should just
override :py:class:`keystoneclient.auth.identity.v3.Auth` directly.
The new :py:class:`~keystoneclient.auth.identity.v3.AuthMethod` should take all
the required parameters via
:py:meth:`~keystoneclient.auth.identity.v3.AuthMethod.__init__` and return from
:py:meth:`~keystoneclient.auth.identity.v3.AuthMethod.get_auth_data` a tuple
with the unique identifier of this plugin (e.g. *password*) and a dictionary
containing the payload of values to send to the authentication server. The
session, calling auth object and request headers are also passed to this
function so that the plugin may use or manipulate them.
You should also provide a class that inherits from
:py:class:`keystoneclient.auth.identity.v3.Auth` with an instance of your new
:py:class:`~keystoneclient.auth.identity.v3.AuthMethod` as the `auth_methods`
parameter to :py:class:`keystoneclient.auth.identity.v3.Auth`.
By convention (and like above) these are named `PluginType` and
`PluginTypeMethod` (for example
:py:class:`~keystoneclient.auth.identity.v3.Password` and
:py:class:`~keystoneclient.auth.identity.v3.PasswordMethod`).
Creating a Custom Plugin
------------------------
To implement an entirely new plugin you should implement the base class
:py:class:`keystoneclient.auth.base.BaseAuthPlugin` and provide the
:py:meth:`~keystoneclient.auth.base.BaseAuthPlugin.get_endpoint`,
:py:meth:`~keystoneclient.auth.base.BaseAuthPlugin.get_token` and
:py:meth:`~keystoneclient.auth.base.BaseAuthPlugin.invalidate` functions.
:py:meth:`~keystoneclient.auth.base.BaseAuthPlugin.get_token` is called to
retrieve the string token from a plugin. It is intended that a plugin will
cache a received token and so if the token is still valid then it should be
re-used rather than fetching a new one. A session object is provided with which
the plugin can contact it's server. (Note: use `authenticated=False` when
making those requests or it will end up being called recursively). The return
value should be the token as a string.
:py:meth:`~keystoneclient.auth.base.BaseAuthPlugin.get_endpoint` is called to
determine a base URL for a particular service's requests. The keyword arguments
provided to the function are those that are given by the `endpoint_filter`
variable in :py:meth:`keystoneclient.session.Session.request`. A session object
is also provided so that the plugin may contact an external source to determine
the endpoint. Again this will be generally be called once per request and so
it is up to the plugin to cache these responses if appropriate. The return
value should be the base URL to communicate with.
:py:meth:`~keystoneclient.auth.base.BaseAuthPlugin.invalidate` should also be
implemented to clear the current user credentials so that on the next
:py:meth:`~keystoneclient.auth.base.BaseAuthPlugin.get_token` call a new token
can be retrieved.
The most simple example of a plugin is the
:py:class:`keystoneclient.auth.token_endpoint.Token` plugin.

240
doc/source/conf.py Normal file
View File

@@ -0,0 +1,240 @@
# -*- coding: utf-8 -*-
#
# python-keystoneclient documentation build configuration file, created by
# sphinx-quickstart on Sun Dec 6 14:19:25 2009.
#
# This file is execfile()d with the current directory set to its containing
# dir.
#
# Note that not all possible configuration values are present in this
# autogenerated file.
#
# All configuration values have a default; values that are commented out
# serve to show the default.
from __future__ import unicode_literals
import os
import sys
import pbr.version
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__),
'..', '..')))
# NOTE(blk-u): Path for our Sphinx extension, remove when
# https://launchpad.net/bugs/1260495 is fixed.
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__),
'..')))
# If extensions (or modules to document with autodoc) are in another directory,
# add these directories to sys.path here. If the directory is relative to the
# documentation root, use os.path.abspath to make it absolute, like shown here.
#sys.path.append(os.path.abspath('.'))
# -- General configuration ----------------------------------------------------
# Add any Sphinx extension module names here, as strings. They can be
# extensions
# coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
extensions = ['sphinx.ext.autodoc',
'sphinx.ext.todo',
'sphinx.ext.coverage',
'sphinx.ext.intersphinx',
'oslosphinx',
# NOTE(blk-u): Uncomment the [pbr] section in setup.cfg and
# remove this Sphinx extension when
# https://launchpad.net/bugs/1260495 is fixed.
'ext.apidoc',
]
todo_include_todos = True
# Add any paths that contain templates here, relative to this directory.
# templates_path = ['_templates']
# The suffix of source filenames.
source_suffix = '.rst'
# The encoding of source files.
#source_encoding = 'utf-8'
# The master toctree document.
master_doc = 'index'
# General information about the project.
project = 'python-keystoneclient'
copyright = 'OpenStack Contributors'
# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
version_info = pbr.version.VersionInfo('python-keystoneclient')
# The short X.Y version.
version = version_info.version_string()
# The full version, including alpha/beta/rc tags.
release = version_info.release_string()
# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#language = None
# There are two options for replacing |today|: either, you set today to some
# non-false value, then it is used:
#today = ''
# Else, today_fmt is used as the format for a strftime call.
#today_fmt = '%B %d, %Y'
# List of documents that shouldn't be included in the build.
#unused_docs = []
# List of directories, relative to source directory, that shouldn't be searched
# for source files.
exclude_trees = []
# The reST default role (used for this markup: `text`) to use for all
# documents.
#default_role = None
# If true, '()' will be appended to :func: etc. cross-reference text.
add_function_parentheses = True
# If true, the current module name will be prepended to all description
# unit titles (such as .. function::).
add_module_names = True
# If true, sectionauthor and moduleauthor directives will be shown in the
# output. They are ignored by default.
#show_authors = False
# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'
# A list of ignored prefixes for module index sorting.
#modindex_common_prefix = []
# Grouping the document tree for man pages.
# List of tuples 'sourcefile', 'target', 'title', 'Authors name', 'manual'
man_pages = [
('man/keystone', 'keystone', 'Client for OpenStack Identity API',
['OpenStack Contributors'], 1),
]
# -- Options for HTML output --------------------------------------------------
# The theme to use for HTML and HTML Help pages. Major themes that come with
# Sphinx are currently 'default' and 'sphinxdoc'.
#html_theme_path = ["."]
#html_theme = '_theme'
# Theme options are theme-specific and customize the look and feel of a theme
# further. For a list of options available for each theme, see the
# documentation.
#html_theme_options = {}
# Add any paths that contain custom themes here, relative to this directory.
#html_theme_path = []
# The name for this set of Sphinx documents. If None, it defaults to
# "<project> v<release> documentation".
#html_title = None
# A shorter title for the navigation bar. Default is the same as html_title.
#html_short_title = None
# The name of an image file (relative to this directory) to place at the top
# of the sidebar.
#html_logo = None
# The name of an image file (within the static path) to use as favicon of the
# docs. This file should be a Windows icon file (.ico) being 16x16 or 32x32
# pixels large.
#html_favicon = None
# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
#html_static_path = ['static']
# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
# using the given strftime format.
git_cmd = "git log --pretty=format:'%ad, commit %h' --date=local -n1"
html_last_updated_fmt = os.popen(git_cmd).read()
# If true, SmartyPants will be used to convert quotes and dashes to
# typographically correct entities.
#html_use_smartypants = True
# Custom sidebar templates, maps document names to template names.
#html_sidebars = {}
# Additional templates that should be rendered to pages, maps page names to
# template names.
#html_additional_pages = {}
# If false, no module index is generated.
#html_use_modindex = True
# If false, no index is generated.
#html_use_index = True
# If true, the index is split into individual pages for each letter.
#html_split_index = False
# If true, links to the reST sources are added to the pages.
#html_show_sourcelink = True
# If true, an OpenSearch description file will be output, and all pages will
# contain a <link> tag referring to it. The value of this option must be the
# base URL from which the finished HTML is served.
#html_use_opensearch = ''
# If nonempty, this is the file name suffix for HTML files (e.g. ".xhtml").
#html_file_suffix = ''
# Output file base name for HTML help builder.
htmlhelp_basename = 'python-keystoneclientdoc'
# -- Options for LaTeX output -------------------------------------------------
# The paper size ('letter' or 'a4').
#latex_paper_size = 'letter'
# The font size ('10pt', '11pt' or '12pt').
#latex_font_size = '10pt'
# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title, author, documentclass [howto/manual])
# .
latex_documents = [
('index', 'python-keystoneclient.tex',
'python-keystoneclient Documentation',
'Nebula Inc, based on work by Rackspace and Jacob Kaplan-Moss',
'manual'),
]
# The name of an image file (relative to this directory) to place at the top of
# the title page.
#latex_logo = None
# For "manual" documents, if this is true, then toplevel headings are parts,
# not chapters.
#latex_use_parts = False
# Additional stuff for the LaTeX preamble.
#latex_preamble = ''
# Documents to append as an appendix to all manuals.
#latex_appendices = []
# If false, no module index is generated.
#latex_use_modindex = True
intersphinx_mapping = {
'python': ('http://docs.python.org/', None),
'osloconfig': ('http://docs.openstack.org/developer/oslo.config/', None),
}

48
doc/source/images/graphs_authComp.svg Normal file
View File

@@ -0,0 +1,48 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.27.20101213.0545 (20101213.0545)
-->
<!-- Title: AuthComp Pages: 1 -->
<svg width="510pt" height="118pt"
viewBox="0.00 0.00 510.00 118.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph1" class="graph" transform="scale(1 1) rotate(0) translate(4 114)">
<title>AuthComp</title>
<polygon fill="white" stroke="white" points="-4,5 -4,-114 507,-114 507,5 -4,5"/>
<!-- AuthComp -->
<g id="node2" class="node"><title>AuthComp</title>
<polygon fill="#fdefe3" stroke="#c00000" points="292,-65 194,-65 194,-25 292,-25 292,-65"/>
<text text-anchor="middle" x="243" y="-48.4" font-family="Helvetica,sans-Serif" font-size="14.00">Auth</text>
<text text-anchor="middle" x="243" y="-32.4" font-family="Helvetica,sans-Serif" font-size="14.00">Component</text>
</g>
<!-- Reject -->
<!-- AuthComp&#45;&gt;Reject -->
<g id="edge3" class="edge"><title>AuthComp&#45;&gt;Reject</title>
<path fill="none" stroke="black" d="M193.933,-51.2787C157.514,-55.939 108.38,-62.2263 73.8172,-66.649"/>
<polygon fill="black" stroke="black" points="73.0637,-63.2168 63.5888,-67.9578 73.9522,-70.1602 73.0637,-63.2168"/>
<text text-anchor="middle" x="129" y="-97.4" font-family="Times,serif" font-size="14.00">Reject</text>
<text text-anchor="middle" x="129" y="-82.4" font-family="Times,serif" font-size="14.00">Unauthenticated</text>
<text text-anchor="middle" x="129" y="-67.4" font-family="Times,serif" font-size="14.00">Requests</text>
</g>
<!-- Service -->
<g id="node6" class="node"><title>Service</title>
<polygon fill="#d1ebf1" stroke="#1f477d" points="502,-65 408,-65 408,-25 502,-25 502,-65"/>
<text text-anchor="middle" x="455" y="-48.4" font-family="Helvetica,sans-Serif" font-size="14.00">OpenStack</text>
<text text-anchor="middle" x="455" y="-32.4" font-family="Helvetica,sans-Serif" font-size="14.00">Service</text>
</g>
<!-- AuthComp&#45;&gt;Service -->
<g id="edge5" class="edge"><title>AuthComp&#45;&gt;Service</title>
<path fill="none" stroke="black" d="M292.17,-45C323.626,-45 364.563,-45 397.52,-45"/>
<polygon fill="black" stroke="black" points="397.917,-48.5001 407.917,-45 397.917,-41.5001 397.917,-48.5001"/>
<text text-anchor="middle" x="350" y="-77.4" font-family="Times,serif" font-size="14.00">Forward</text>
<text text-anchor="middle" x="350" y="-62.4" font-family="Times,serif" font-size="14.00">Authenticated</text>
<text text-anchor="middle" x="350" y="-47.4" font-family="Times,serif" font-size="14.00">Requests</text>
</g>
<!-- Start -->
<!-- Start&#45;&gt;AuthComp -->
<g id="edge7" class="edge"><title>Start&#45;&gt;AuthComp</title>
<path fill="none" stroke="black" d="M59.1526,-21.4745C90.4482,-25.4792 142.816,-32.1802 183.673,-37.4084"/>
<polygon fill="black" stroke="black" points="183.43,-40.9057 193.793,-38.7034 184.318,-33.9623 183.43,-40.9057"/>
</g>
</g>
</svg>
Side by Side

After

Width:  |  Height:  |  Size: 2.9 KiB

53
doc/source/images/graphs_authCompDelegate.svg Normal file
View File

@@ -0,0 +1,53 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.27.20101213.0545 (20101213.0545)
-->
<!-- Title: AuthCompDelegate Pages: 1 -->
<svg width="588pt" height="104pt"
viewBox="0.00 0.00 588.00 104.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph1" class="graph" transform="scale(1 1) rotate(0) translate(4 100)">
<title>AuthCompDelegate</title>
<polygon fill="white" stroke="white" points="-4,5 -4,-100 585,-100 585,5 -4,5"/>
<!-- AuthComp -->
<g id="node2" class="node"><title>AuthComp</title>
<polygon fill="#fdefe3" stroke="#c00000" points="338,-65 240,-65 240,-25 338,-25 338,-65"/>
<text text-anchor="middle" x="289" y="-48.4" font-family="Helvetica,sans-Serif" font-size="14.00">Auth</text>
<text text-anchor="middle" x="289" y="-32.4" font-family="Helvetica,sans-Serif" font-size="14.00">Component</text>
</g>
<!-- Reject -->
<!-- AuthComp&#45;&gt;Reject -->
<g id="edge3" class="edge"><title>AuthComp&#45;&gt;Reject</title>
<path fill="none" stroke="black" d="M239.6,-50.1899C191.406,-55.2531 118.917,-62.8686 73.5875,-67.6309"/>
<polygon fill="black" stroke="black" points="73.0928,-64.1635 63.5132,-68.6893 73.8242,-71.1252 73.0928,-64.1635"/>
<text text-anchor="middle" x="152" y="-83.4" font-family="Times,serif" font-size="14.00">Reject Requests</text>
<text text-anchor="middle" x="152" y="-68.4" font-family="Times,serif" font-size="14.00">Indicated by the Service</text>
</g>
<!-- Service -->
<g id="node6" class="node"><title>Service</title>
<polygon fill="#d1ebf1" stroke="#1f477d" points="580,-65 486,-65 486,-25 580,-25 580,-65"/>
<text text-anchor="middle" x="533" y="-48.4" font-family="Helvetica,sans-Serif" font-size="14.00">OpenStack</text>
<text text-anchor="middle" x="533" y="-32.4" font-family="Helvetica,sans-Serif" font-size="14.00">Service</text>
</g>
<!-- AuthComp&#45;&gt;Service -->
<g id="edge5" class="edge"><title>AuthComp&#45;&gt;Service</title>
<path fill="none" stroke="black" d="M338.009,-49.0804C344.065,-49.4598 350.172,-49.7828 356,-50 405.743,-51.8535 418.259,-51.9103 468,-50 470.523,-49.9031 473.101,-49.7851 475.704,-49.6504"/>
<polygon fill="black" stroke="black" points="476.03,-53.1374 485.807,-49.0576 475.62,-46.1494 476.03,-53.1374"/>
<text text-anchor="middle" x="412" y="-68.4" font-family="Times,serif" font-size="14.00">Forward Requests</text>
<text text-anchor="middle" x="412" y="-53.4" font-family="Times,serif" font-size="14.00">with Identiy Status</text>
</g>
<!-- Service&#45;&gt;AuthComp -->
<g id="edge7" class="edge"><title>Service&#45;&gt;AuthComp</title>
<path fill="none" stroke="black" d="M495.062,-24.9037C486.397,-21.2187 477.064,-17.9304 468,-16 419.314,-5.63183 404.743,-5.9037 356,-16 349.891,-17.2653 343.655,-19.116 337.566,-21.2803"/>
<polygon fill="black" stroke="black" points="336.234,-18.0426 328.158,-24.9003 338.748,-24.5757 336.234,-18.0426"/>
<text text-anchor="middle" x="412" y="-33.4" font-family="Times,serif" font-size="14.00">Send Response OR</text>
<text text-anchor="middle" x="412" y="-18.4" font-family="Times,serif" font-size="14.00">Reject Message</text>
</g>
<!-- Start -->
<!-- Start&#45;&gt;AuthComp -->
<g id="edge9" class="edge"><title>Start&#45;&gt;AuthComp</title>
<path fill="none" stroke="black" d="M59.0178,-20.8384C99.2135,-25.0613 175.782,-33.1055 229.492,-38.7482"/>
<polygon fill="black" stroke="black" points="229.265,-42.2435 239.576,-39.8076 229.997,-35.2818 229.265,-42.2435"/>
</g>
</g>
</svg>
Side by Side

After

Width:  |  Height:  |  Size: 3.5 KiB

49
doc/source/index.rst Normal file
View File

@@ -0,0 +1,49 @@
Python bindings to the OpenStack Identity API (Keystone)
========================================================
This is a client for OpenStack Identity API. There's a Python API for
:doc:`Identity API v3 <using-api-v3>` and :doc:`v2 <using-api-v2>` (the
:mod:`keystoneclient` modules), and a command-line script (installed as
:doc:`keystone <man/keystone>`).
Contents:
.. toctree::
:maxdepth: 1
man/keystone
using-api-v3
using-sessions
authentication-plugins
using-api-v2
api/modules
Related Identity Projects
=========================
In addition to creating the Python client library, the Keystone team also
provides `Identity Service`_, as well as `WSGI Middleware`_.
.. _`Identity Service`: http://docs.openstack.org/developer/keystone/
.. _`WSGI Middleware`: http://docs.openstack.org/developer/keystonemiddleware/
Contributing
============
Code is hosted `on GitHub`_. Submit bugs to the Keystone project on
`Launchpad`_. Submit code to the ``openstack/python-keystoneclient`` project
using `Gerrit`_.
.. _on GitHub: https://github.com/openstack/python-keystoneclient
.. _Launchpad: https://launchpad.net/python-keystoneclient
.. _Gerrit: http://docs.openstack.org/infra/manual/developers.html#development-workflow
Run tests with ``python setup.py test``.
Indices and tables
==================
* :ref:`genindex`
* :ref:`modindex`
* :ref:`search`

158
doc/source/man/keystone.rst Normal file
View File

@@ -0,0 +1,158 @@
==============================================================
:program:`keystone` command line utility (pending deprecation)
==============================================================
.. program:: keystone
.. highlight:: bash
SYNOPSIS
========
:program:`keystone` [options] <command> [command-options]
:program:`keystone help`
:program:`keystone help` <command>
DESCRIPTION
===========
.. WARNING::
The :program:`keystone` command line utility is pending deprecation. The
`OpenStackClient unified command line utility
<http://docs.openstack.org/developer/python-openstackclient/>`_ should be
used instead. The :program:`keystone` command line utility only supports V2
of the Identity API whereas the OSC program supports both V2 and V3.
The :program:`keystone` command line utility interacts with services providing
OpenStack Identity API (e.g. Keystone).
To communicate with the API, you will need to be authenticated - and the
:program:`keystone` provides multiple options for this.
While bootstrapping Keystone the authentication is accomplished with a
shared secret token and the location of the Identity API endpoint. The
shared secret token is configured in keystone.conf as "admin_token".
You can specify those values on the command line with :option:`--os-token`
and :option:`--os-endpoint`, or set them in environment variables:
.. envvar:: OS_SERVICE_TOKEN
Your Keystone administrative token
.. envvar:: OS_SERVICE_ENDPOINT
Your Identity API endpoint
The command line options will override any environment variables set.
If you already have accounts, you can use your OpenStack username and
password. You can do this with the :option:`--os-username`,
:option:`--os-password`.
Keystone allows a user to be associated with one or more projects which are
historically called tenants. To specify the project for which you want to
authorize against, you may optionally specify a :option:`--os-tenant-id` or
:option:`--os-tenant-name`.
Instead of using options, it is easier to just set them as environment
variables:
.. envvar:: OS_USERNAME
Your Keystone username.
.. envvar:: OS_PASSWORD
Your Keystone password.
.. envvar:: OS_TENANT_NAME
Name of Keystone project.
.. envvar:: OS_TENANT_ID
ID of Keystone Tenant.
.. envvar:: OS_AUTH_URL
The OpenStack API server URL.
.. envvar:: OS_IDENTITY_API_VERSION
The OpenStack Identity API version.
.. envvar:: OS_CACERT
The location for the CA truststore (PEM formatted) for this client.
.. envvar:: OS_CERT
The location for the keystore (PEM formatted) containing the public
key of this client. This keystore can also optionally contain the
private key of this client.
.. envvar:: OS_KEY
The location for the keystore (PEM formatted) containing the private
key of this client. This value can be empty if the private key is
included in the OS_CERT file.
For example, in Bash you'd use::
export OS_USERNAME=yourname
export OS_PASSWORD=yadayadayada
export OS_TENANT_NAME=myproject
export OS_AUTH_URL=http(s)://example.com:5000/v2.0/
export OS_IDENTITY_API_VERSION=2.0
export OS_CACERT=/etc/keystone/yourca.pem
export OS_CERT=/etc/keystone/yourpublickey.pem
export OS_KEY=/etc/keystone/yourprivatekey.pem
OPTIONS
=======
To get a list of available commands and options run::
keystone help
To get usage and options of a command::
keystone help <command>
EXAMPLES
========
Get information about endpoint-create command::
keystone help endpoint-create
View endpoints of OpenStack services::
keystone catalog
Create a 'service' project::
keystone tenant-create --name=service
Create service user for nova::
keystone user-create --name=nova \
--tenant_id=<project ID> \
--email=nova@nothing.com
View roles::
keystone role-list
BUGS
====
Keystone client is hosted in Launchpad so you can view current bugs at
https://bugs.launchpad.net/python-keystoneclient/.

117
doc/source/using-api-v2.rst Normal file
View File

@@ -0,0 +1,117 @@
=======================
Using the V2 Client API
=======================
Introduction
============
The main concepts in the Identity v2 API are:
* tenants
* users
* roles
* services
* endpoints
The V2 client API lets you query and make changes through
managers. For example, to manipulate tenants, you interact with a
``keystoneclient.v2_0.tenants.TenantManager`` object.
You obtain access to managers via attributes of the
``keystoneclient.v2_0.client.Client`` object. For example, the ``tenants``
attribute of the ``Client`` class is a tenant manager::
>>> from keystoneclient.v2_0 import client
>>> keystone = client.Client(...)
>>> keystone.tenants.list() # List tenants
You create a valid ``keystoneclient.v2_0.client.Client`` object by passing
authentication data to the constructor. Authentication and examples of common
tasks are provided below.
You can generally expect that when the client needs to propagate an exception
it will raise an instance of subclass of
``keystoneclient.exceptions.ClientException``
Authenticating
==============
There are two ways to authenticate against Keystone:
* against the admin endpoint with the admin token
* against the public endpoint with a username and password
If you are an administrator, you can authenticate by connecting to the admin
endpoint and using the admin token (sometimes referred to as the service
token). The token is specified as the ``admin_token`` configuration option in
your keystone.conf config file, which is typically in /etc/keystone::
>>> from keystoneclient.v2_0 import client
>>> token = '012345SECRET99TOKEN012345'
>>> endpoint = 'http://192.168.206.130:35357/v2.0'
>>> keystone = client.Client(token=token, endpoint=endpoint)
If you have a username and password, authentication is done against the
public endpoint. You must also specify a tenant that is associated with the
user::
>>> from keystoneclient.v2_0 import client
>>> username='adminUser'
>>> password='secreetword'
>>> tenant_name='openstackDemo'
>>> auth_url='http://192.168.206.130:5000/v2.0'
>>> keystone = client.Client(username=username, password=password,
... tenant_name=tenant_name, auth_url=auth_url)
Creating tenants
================
This example will create a tenant named *openStackDemo*::
>>> from keystoneclient.v2_0 import client
>>> keystone = client.Client(...)
>>> keystone.tenants.create(tenant_name="openstackDemo",
... description="Default Tenant", enabled=True)
<Tenant {u'id': u'9b7962da6eb04745b477ae920ad55939', u'enabled': True, u'description': u'Default Tenant', u'name': u'openstackDemo'}>
Creating users
==============
This example will create a user named *adminUser* with a password *secretword*
in the opoenstackDemo tenant. We first need to retrieve the tenant::
>>> from keystoneclient.v2_0 import client
>>> keystone = client.Client(...)
>>> tenants = keystone.tenants.list()
>>> my_tenant = [x for x in tenants if x.name=='openstackDemo'][0]
>>> my_user = keystone.users.create(name="adminUser",
... password="secretword",
... tenant_id=my_tenant.id)
Creating roles and adding users
===============================
This example will create an admin role and add the *my_user* user to that
role, but only for the *my_tenant* tenant:
>>> from keystoneclient.v2_0 import client
>>> keystone = client.Client(...)
>>> role = keystone.roles.create('admin')
>>> my_tenant = ...
>>> my_user = ...
>>> keystone.roles.add_user_role(my_user, role, my_tenant)
Creating services and endpoints
===============================
This example will create the service and corresponding endpoint for the
Compute service::
>>> from keystoneclient.v2_0 import client
>>> keystone = client.Client(...)
>>> service = keystone.services.create(name="nova", service_type="compute",
... description="Nova Compute Service")
>>> keystone.endpoints.create(
... region="RegionOne", service_id=service.id,
... publicurl="http://192.168.206.130:8774/v2/%(tenant_id)s",
... adminurl="http://192.168.206.130:8774/v2/%(tenant_id)s",
... internalurl="http://192.168.206.130:8774/v2/%(tenant_id)s")

140
doc/source/using-api-v3.rst Normal file
View File

@@ -0,0 +1,140 @@
=======================
Using the V3 Client API
=======================
Introduction
============
The main concepts in the Identity v3 API are:
* :py:mod:`~keystoneclient.v3.credentials`
* :py:mod:`~keystoneclient.v3.domains`
* :py:mod:`~keystoneclient.v3.endpoints`
* :py:mod:`~keystoneclient.v3.groups`
* :py:mod:`~keystoneclient.v3.policies`
* :py:mod:`~keystoneclient.v3.projects`
* :py:mod:`~keystoneclient.v3.regions`
* :py:mod:`~keystoneclient.v3.role_assignments`
* :py:mod:`~keystoneclient.v3.roles`
* :py:mod:`~keystoneclient.v3.services`
* :py:mod:`~keystoneclient.v3.tokens`
* :py:mod:`~keystoneclient.v3.users`
The :py:mod:`keystoneclient.v3.client` API lets you query and make changes
through ``managers``. For example, to manipulate a project (formerly
called tenant), you interact with a
:py:class:`keystoneclient.v3.projects.ProjectManager` object.
You obtain access to managers through attributes of a
:py:class:`keystoneclient.v3.client.Client` object. For example, the
``projects`` attribute of a ``Client`` object is a projects manager::
>>> from keystoneclient.v3 import client
>>> keystone = client.Client(...)
>>> keystone.projects.list() # List projects
While it is possible to instantiate a
:py:class:`keystoneclient.v3.client.Client` object (as done above for
clarity), the recommended approach is to use the discovery mechanism
provided by the :py:class:`keystoneclient.client.Client` class. The
appropriate class will be instantiated depending on the API versions
available::
>>> from keystoneclient import client
>>> keystone =
... client.Client(auth_url='http://localhost:5000', ...)
>>> type(keystone)
<class 'keystoneclient.v3.client.Client'>
One can force the use of a specific version of the API, either by
using the ``version`` keyword argument::
>>> from keystoneclient import client
>>> keystone = client.Client(auth_url='http://localhost:5000',
version=(2,), ...)
>>> type(keystone)
<class 'keystoneclient.v2_0.client.Client'>
>>> keystone = client.Client(auth_url='http://localhost:5000',
version=(3,), ...)
>>> type(keystone)
<class 'keystoneclient.v3.client.Client'>
Or by specifying directly the specific API version authentication URL
as the auth_url keyword argument::
>>> from keystoneclient import client
>>> keystone =
... client.Client(auth_url='http://localhost:5000/v2.0', ...)
>>> type(keystone)
<class 'keystoneclient.v2_0.client.Client'>
>>> keystone =
... client.Client(auth_url='http://localhost:5000/v3', ...)
>>> type(keystone)
<class 'keystoneclient.v3.client.Client'>
Upon successful authentication, a :py:class:`keystoneclient.v3.client.Client`
object is returned (when using the Identity v3 API). Authentication and
examples of common tasks are provided below.
You can generally expect that when the client needs to propagate an
exception it will raise an instance of subclass of
``keystoneclient.exceptions.ClientException`` (see
:py:class:`keystoneclient.openstack.common.apiclient.exceptions.ClientException`)
Authenticating Using Sessions
=============================
Instantiate a :py:class:`keystoneclient.v3.client.Client` using a
:py:class:`~keystoneclient.session.Session` to provide the authentication
plugin, SSL/TLS certificates, and other data::
>>> from keystoneclient.auth.identity import v3
>>> from keystoneclient import session
>>> from keystoneclient.v3 import client
>>> auth = v3.Password(auth_url='https://my.keystone.com:5000/v3',
... user_id='myuserid',
... password='mypassword',
... project_id='myprojectid')
>>> sess = session.Session(auth=auth)
>>> keystone = client.Client(session=sess)
For more information on Sessions refer to: `Using Sessions`_.
.. _`Using Sessions`: using-sessions.html
Non-Session Authentication (deprecated)
=======================================
The *deprecated* way to authenticate is to pass the username, the user's domain
name (which will default to 'Default' if it is not specified), and a
password::
>>> from keystoneclient import client
>>> auth_url = 'http://localhost:5000'
>>> username = 'adminUser'
>>> user_domain_name = 'Default'
>>> password = 'secreetword'
>>> keystone = client.Client(auth_url=auth_url, version=(3,),
... username=username, password=password,
... user_domain_name=user_domain_name)
A :py:class:`~keystoneclient.session.Session` should be passed to the Client
instead. Using a Session you're not limited to authentication using a username
and password but can take advantage of other more secure authentication
methods.
You may optionally specify a domain or project (along with its project
domain name), to obtain a scoped token::
>>> from keystoneclient import client
>>> auth_url = 'http://localhost:5000'
>>> username = 'adminUser'
>>> user_domain_name = 'Default'
>>> project_name = 'demo'
>>> project_domain_name = 'Default'
>>> password = 'secreetword'
>>> keystone = client.Client(auth_url=auth_url, version=(3,),
... username=username, password=password,
... user_domain_name=user_domain_name,
... project_name=project_name,
... project_domain_name=project_domain_name)

198
doc/source/using-sessions.rst Normal file
View File

@@ -0,0 +1,198 @@
==============
Using Sessions
==============
Introduction
============
The :py:class:`keystoneclient.session.Session` class was introduced into
keystoneclient as an attempt to bring a unified interface to the various
OpenStack clients that share common authentication and request parameters
between a variety of services.
The model for using a Session and auth plugin as well as the general terms used
have been heavily inspired by the `requests <http://docs.python-requests.org>`_
library. However neither the Session class nor any of the authentication
plugins rely directly on those concepts from the requests library so you should
not expect a direct translation.
Features
--------
- Common client authentication
Authentication is handled by one of a variety of authentication plugins and
then this authentication information is shared between all the services that
use the same Session object.
- Security maintenance
Security code is maintained in a single place and reused between all
clients such that in the event of problems it can be fixed in a single
location.
- Standard discovery mechanisms
Clients are not expected to have any knowledge of an identity token or any
other form of identification credential. Service and endpoint discovery are
handled by the Session and plugins.
Sessions for Users
==================
The Session object is the contact point to your OpenStack cloud services. It
stores the authentication credentials and connection information required to
communicate with OpenStack such that it can be reused to communicate with many
services. When creating services this Session object is passed to the client
so that it may use this information.
A Session will authenticate on demand. When a request that requires
authentication passes through the Session the authentication plugin will be
asked for a valid token. If a valid token is available it will be used
otherwise the authentication plugin may attempt to contact the authentication
service and fetch a new one.
An example from keystoneclient::
>>> from keystoneclient.auth.identity import v3
>>> from keystoneclient import session
>>> from keystoneclient.v3 import client
>>> auth = v3.Password(auth_url='https://my.keystone.com:5000/v2.0',
... username='myuser',
... password='mypassword',
... project_id='proj')
>>> sess = session.Session(auth=auth,
... verify='/path/to/ca.cert')
>>> ks = client.Client(session=sess)
>>> users = ks.users.list()
As clients adopt this means of operating they will be created in a similar
fashion by passing the Session object to the client's constructor.
Migrating keystoneclient to use a Session
-----------------------------------------
By using a session with a keystoneclient Client we presume that you have opted
in to new behavior defined by the session. For example authentication is now
on-demand rather than on creation. To allow this change in behavior there are
a number of functions that have changed behavior or are no longer available.
For example the
:py:meth:`keystoneclient.httpclient.HTTPClient.authenticate` method used
to be able to always re-authenticate the current client and fetch a new token.
As this is now controlled by the Session and not the client this has changed,
however the function will still exist to provide compatibility with older
clients.
Likewise certain parameters such as ``user_id`` and ``auth_token`` that used to
be available on the client object post authentication will remain
uninitialized.
When converting an application to use a session object with keystoneclient you
should be aware of the possibility of changes to authentication and
authentication parameters and make sure to test your code thoroughly. It should
have no impact on the typical CRUD interaction with the client.
Sharing Authentication Plugins
------------------------------
A session can only contain one authentication plugin however there is nothing
that specifically binds the authentication plugin to that session, a new
Session can be created that reuses the existing authentication plugin::
>>> new_sess = session.Session(auth=sess.auth,
verify='/path/to/different-cas.cert')
In this case we cannot know which session object will be used when the plugin
performs the authentication call so the command must be able to succeed with
either.
Authentication plugins can also be provided on a per-request basis. This will
be beneficial in a situation where a single session is juggling multiple
authentication credentials::
>>> sess.get('https://my.keystone.com:5000/v3',
auth=my_auth_plugin)
If an auth plugin is provided via parameter then it will override any auth
plugin on the session.
Sessions for Client Developers
==============================
Sessions are intended to take away much of the hassle of dealing with
authentication data and token formats. Clients should be able to specify filter
parameters for selecting the endpoint and have the parsing of the catalog
managed for them.
Authentication
--------------
When making a request with a session object you can simply pass the keyword
parameter ``authenticated`` to indicate whether the argument should contain a
token, by default a token is included if an authentication plugin is available::
>>> # In keystone this route is unprotected by default
>>> resp = sess.get('https://my.keystone.com:5000/v3',
authenticated=False)
Service Discovery
-----------------
In OpenStack the URLs of available services are distributed to the user as a
part of the token they receive called the Service Catalog. Clients are expected
to use the URLs from the Service Catalog rather than have them provided.
In general a client does not need to know the full URL for the server that they
are communicating with, simply that it should send a request to a path
belonging to the correct service.
This is controlled by the ``endpoint_filter`` parameter to a request which
contains all the information an authentication plugin requires to determine the
correct URL to which to send a request. When using this mode only the path for
the request needs to be specified::
>>> resp = session.get('/v3/users',
endpoint_filter={'service_type': 'identity',
'interface': 'public',
'region_name': 'myregion'})
``endpoint_filter`` accepts a number of arguments with which it can determine
an endpoint url:
- ``service_type``: the type of service. For example ``identity``, ``compute``,
``volume`` or many other predefined identifiers.
- ``interface``: the network exposure the interface has. This will be one of:
- ``public``: An endpoint that is available to the wider internet or network.
- ``internal``: An endpoint that is only accessible within the private network.
- ``admin``: An endpoint to be used for administrative tasks.
- ``region_name``: the name of the region where the endpoint resides.
The endpoint filter is a simple key-value filter and can be provided with any
number of arguments. It is then up to the auth plugin to correctly use the
parameters it understands.
The session object determines the URL matching the filter and append to it the
provided path and so create a valid request. If multiple URL matches are found
then any one may be chosen.
While authentication plugins will endeavour to maintain a consistent set of
arguments for an ``endpoint_filter`` the concept of an authentication plugin is
purposefully generic and a specific mechanism may not know how to interpret
certain arguments and ignore them. For example the
:py:class:`keystoneclient.auth.token_endpoint.Token` plugin (which is used when
you want to always use a specific endpoint and token combination) will always
return the same endpoint regardless of the parameters to ``endpoint_filter`` or
a custom OpenStack authentication mechanism may not have the concept of
multiple ``interface`` options and choose to ignore that parameter.
There is some expectation on the user that they understand the limitations of
the authentication system they are using.