Adding Keystone protection with RBAC
Admin guide was missing Keystone API protection with Role Based Access Control (RBAC). This patch gets the information from Keystone configuration.rst Change-Id: I7609452ef6ca8ddbaefaecaa305561fab8564252 Closes-bug: 1279486
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tellesnobrega
Diane Fleming
parent
e161b84a19
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a8ece637f4
@ -4,15 +4,15 @@
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xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
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xml:id="ch-identity-mgmt-config">
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<title>Identity management</title>
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<para>The OpenStack Identity Service, code-named keystone, is the
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<para>OpenStack Identity, code-named keystone, is the
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default identity management system for OpenStack. After you
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install the Identity Service, you configure it through the
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install Identity, you configure it through the
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<filename>etc/keystone.conf</filename> configuration file and,
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possibly, a separate logging configuration file. You initialize
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data into the Identity Service by using the
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data into Identity by using the
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<command>keystone</command> command-line client.</para>
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<section xml:id="keystone-admin-concepts">
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<title>Identity Service concepts</title>
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<title>Identity concepts</title>
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<xi:include
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href="../common/section_keystone-concepts-user-management.xml"/>
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<xi:include
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@ -29,7 +29,7 @@
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<xi:include href="identity/section_keystone-token-binding.xml"/>
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<section xml:id="user-crud">
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<title>User CRUD</title>
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<para>The Identity Service provides a user CRUD filter that can
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<para>Identity provides a user CRUD filter that can
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be added to the public_api pipeline. This user CRUD filter
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enables users to use a HTTP PATCH to change their own password.
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To enable this extension you should define a
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@ -44,16 +44,15 @@ paste.filter_factory = keystone.contrib.user_crud:CrudExtension.factory
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[pipeline:public_api]
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pipeline = stats_monitoring url_normalize token_auth admin_token_auth xml_body json_body debug ec2_extension user_crud_extension public_service</programlisting>
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<para>Each user can then change their own password with a HTTP PATCH:</para>
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<screen><prompt>$</prompt> <userinput>curl -X PATCH http://localhost:5000/v2.0/OS-KSCRUD/users/<userid> -H "Content-type: application/json" \
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-H "X_Auth_Token: <authtokenid>" -d '{"user": {"password": "ABCD", "original_password": "DCBA"}}'</userinput></screen>
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<para>In addition to changing their password, all of the user's current
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tokens are deleted (if the back-end is KVS or sql).</para>
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<note><para>Only use a KVS backend for tokens when testing.</para></note>
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<screen><prompt>$</prompt> <userinput>curl -X PATCH http://localhost:5000/v2.0/OS-KSCRUD/users/<replaceable>USERID</replaceable> -H "Content-type: application/json" \
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-H "X_Auth_Token: <replaceable>AUTHTOKENID</replaceable>" -d '{"user": {"password": "ABCD", "original_password": "DCBA"}}'</userinput></screen>
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<para>In addition to changing their password, all current
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tokens for the user are deleted (if the back end is KVS or sql).</para>
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<note><para>Only use a KVS back end for tokens when testing.</para></note>
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</section>
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<section xml:id="keystone-logging">
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<title>Logging</title>
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<para>You configure logging externally to the rest of the Identity
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Service. The file specifying the logging configuration is in the
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<para>You configure logging externally to the rest of Identity. The file specifying the logging configuration is in the
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<literal>[DEFAULT]</literal> section of the
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<filename>keystone.conf</filename> file under
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<literal>log_config</literal>. To route logging through
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@ -61,7 +60,7 @@ pipeline = stats_monitoring url_normalize token_auth admin_token_auth xml_body j
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<literal>[DEFAULT]</literal> section.</para>
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<para>A sample logging file is available with the project in the
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<filename>etc/logging.conf.sample</filename> directory. Like
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other OpenStack projects, the Identity Service uses the Python
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other OpenStack projects, Identity uses the Python
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logging module, which includes extensive configuration options
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that let you define the output levels and formats.</para>
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<para>Review the <filename>etc/keystone.conf</filename> sample
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@ -100,7 +99,7 @@ admin_tenant_name = service</programlisting>
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</section>
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<section xml:id="monitoring">
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<title>Monitoring</title>
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<para>The Identity Service provides some basic request/response
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<para>Identity provides some basic request and response
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monitoring statistics out of the box.</para>
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<para>Enable data collection by defining a
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<literal>stats_monitoring</literal> filter and including it at
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@ -127,8 +126,8 @@ pipeline = [...] json_body stats_reporting ec2_extension [...] admin_service</pr
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http://localhost:35357/v2.0/OS-STATS/stats</userinput></screen>
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</section>
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<section xml:id="running-keystone">
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<title>Start the Identity Service</title>
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<para>To start the services for the Identity Service, run the
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<title>Start the Identity services</title>
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<para>To start the services for Identity, run the
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following command:</para>
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<screen><prompt>$</prompt> <userinput>keystone-all</userinput></screen>
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<para>This command starts two wsgi.Server instances configured by
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@ -172,7 +171,7 @@ keystone --username=admin --password=secrete --tenant_name=admin tenant-create -
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<section xml:id="auth-token-middleware-with-username-and-password">
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<title>Authentication middleware with user name and
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password</title>
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<para>You can also configure the Identity Service authentication
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<para>You can also configure Identity authentication
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middleware using the <option>admin_user</option> and
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<option>admin_password</option> options. When using the
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<option>admin_user</option> and
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@ -226,6 +225,94 @@ admin_password = keystone123</programlisting>
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role on the admin tenant.</para>
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</note>
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</section>
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<section xml:id="identity-service-api-protection-with-role-based-access-control">
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<title>Identity API protection with role-based access control (RBAC)
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</title>
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<para>Like most OpenStack projects, Identity supports the protection of
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its APIs by defining policy rules based on an RBAC approach. Identity
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stores a reference to a policy JSON file in the main Identity
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configuration file, <filename>keystone.conf</filename>. Typically this
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file is named <filename>policy.json</filename>, and it contains the rules
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for which roles have access to certain actions in defined services.</para>
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<para>Each Identity API v3 call has a line in the policy file that dictates which
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level of governance of access applies.</para>
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<programlisting language="ini"><replaceable>API_NAME</replaceable>: <replaceable>RULE_STATEMENT</replaceable> or <replaceable>MATCH_STATEMENT</replaceable></programlisting>
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<para>Where:</para>
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<para><code><replaceable>RULE_STATEMENT</replaceable></code> can contain <code><replaceable>RULE_STATEMENT</replaceable></code> or <code><replaceable>MATCH_STATEMENT</replaceable></code>.</para>
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<para><code><replaceable>MATCH_STATEMENT</replaceable></code> is a set of identifiers that must match between the token
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provided by the caller of the API and the parameters or target entities of
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the API call in question. For example:</para>
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<programlisting language="ini">"identity:create_user": [["role:admin", "domain_id:%(user.domain_id)s"]]</programlisting>
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<para>Indicates that to create a user, you must have the admin role in your token and
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the <literal>domain_id</literal> in your token (which implies this must be a domain-scoped token)
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must match the <literal>domain_id</literal> in the user object that you are trying to
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create. In other words, you must have the admin role on the domain in which
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you are creating the user, and the token that you use must be scoped to that
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domain.</para>
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<para>Each component of a match statement uses this format:</para>
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<programlisting language="ini"><replaceable>ATTRIB_FROM_TOKEN</replaceable>:<replaceable>CONSTANT</replaceable> or <replaceable>ATTRIB_RELATED_TO_API_CALL</replaceable></programlisting>
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<para>The Identity service expects these attributes:</para>
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<para>Attributes from token: <literal>user_id</literal>, the <literal>domain_id</literal> or <literal>project_id</literal> depending on
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the scope, and the list of roles you have within that scope.</para>
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<para>Attributes related to API call: Any parameters passed into the API call
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are available, along with any filters specified in the query string. You
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reference attributes of objects passed with an object.attribute syntax
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(such as, <literal>user.domain_id</literal>). The target objects of an API are
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also available using a target.object.attribute syntax. For
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instance:</para>
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<programlisting language="ini">"identity:delete_user": [["role:admin", "domain_id:%(target.user.domain_id)s"]]</programlisting>
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<para>would ensure that Identity only deletes the user object in the same
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domain as the provided token.</para>
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<para>Every target object has an `id` and a `name` available as
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`target.<replaceable>OBJECT</replaceable>.id` and `target.<replaceable>OBJECT</replaceable>.name`. Identity
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retrieves other attributes from the database, and the attributes vary
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between object types. The Identity service filters out some database
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fields, such as user passwords.</para>
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<para>List of object attributes:</para>
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<programlisting language="ini">role:
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target.role.id
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target.role.name
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user:
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target.user.default_project_id
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target.user.description
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target.user.domain_id
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target.user.enabled
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target.user.id
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target.user.name
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group:
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target.group.description
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target.group.domain_id
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target.group.id
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target.group.name
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domain:
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target.domain.enabled
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target.domain.id
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target.domain.name
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project:
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target.project.description
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target.project.domain_id
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target.project.enabled
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target.project.id
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target.project.name</programlisting>
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<para>The default <filename>policy.json</filename> file supplied provides a
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somewhat basic example of API protection, and does not assume any
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particular use of domains. Refer to
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<filename>policy.v3cloudsample.json</filename> as an example of
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multi-domain configuration installations where a cloud provider wants to
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delegate administration of the contents of a domain to a particular admin
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domain. This example policy file also shows the use of an admin_domain to
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allow a cloud provider to enable cloud administrators to have wider access
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across the APIs.</para>
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<para>A clean installation could start with the standard policy file, to allow
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creation of the admin_domain with the first users within it. You could
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then obtain the domain_id of the admin domain, paste the ID into a
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modified version of <filename>policy.v3cloudsample.json</filename>, and
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then enable it as the main policy file.</para>
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</section>
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<?hard-pagebreak?>
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<xi:include href="../common/section_identity-troubleshooting.xml"/>
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</chapter>
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