openstack/openstack-manuals
Code Issues Proposed changes
openstack-manuals/doc/admin-guide/source/keystone_use_trusts.rst
Joseph Robinson 2ce5b11b1a [User Guides] Rename Admin-Guide-Cloud to Admin-Guide 
This patch changes the name of the Admin-Guide from the Cloud
Admin Guide to the Administrator guide. This affects the
filename in the repository, and references to cloud administrators
within the document texts.

1.) Changing instances of 'cloud administrator'
    to 'administrator'.

2.) Change links from '/admin-guide-cloud/' to
    '/admin-guide/' within the Admin Guide.

3.) Adjust .htaccess file.

Change-Id: I7f21a710e922981aa295afc0616de36fd819b523
Implements: blueprint user-guides-reorganised
2016-04-01 19:50:13 +09:00

1.8 KiB
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Use trusts

OpenStack Identity manages authentication and authorization. A trust is an OpenStack Identity extension that enables delegation and, optionally, impersonation through keystone. A trust extension defines a relationship between:

Trustor

The user delegating a limited set of their own rights to another user.

Trustee

The user trust is being delegated to, for a limited time.

The trust can eventually allow the trustee to impersonate the trustor. For security reasons, some safeties are added. For example, if a trustor loses a given role, any trusts the user issued with that role, and the related tokens, are automatically revoked.

The delegation parameters are:

User ID

The user IDs for the trustor and trustee.

Privileges

The delegated privileges are a combination of a tenant ID and a number of roles that must be a subset of the roles assigned to the trustor.

If you omit all privileges, nothing is delegated. You cannot delegate everything.

Delegation depth

Defines whether or not the delegation is recursive. If it is recursive, defines the delegation chain length.

Specify one of the following values:

  • 0. The delegate cannot delegate these permissions further.
  • 1. The delegate can delegate the permissions to any set of delegates but the latter cannot delegate further.
  • inf. The delegation is infinitely recursive.
Endpoints

A list of endpoints associated with the delegation.

This parameter further restricts the delegation to the specified endpoints only. If you omit the endpoints, the delegation is useless. A special value of all_endpoints allows the trust to be used by all endpoints associated with the delegated tenant.

Duration

(Optional) Comprised of the start time and end time for the trust.