In Abiquo, user scopes are access lists. Scopes control the cloud locations (datacenters and public cloud regions) and tenants (Abiquo enterprises) that an administrator can manage. Scopes can also allow the tenants in a scope to access a resource with this scope. So administrators can use resource scopes to share virtual machine templates and virtual appliance spec blueprints. Abiquo 4.0 introduces user scopes and scope hierarchies.
In Abiquo 4.0, administrators assign scopes to users, instead of to roles as in previous versions. During the upgrade, Abiquo will assign role scopes to users with that role. In previous versions, the default scope for all roles was the global scope. Now there is a default scope for each enterprise tenant.
In the dialog to create a user, Abiquo displays the enterprise’s default scope as the first element in the dropdown list.
A user with the default enterprise administrator role can assign the following scopes:
An administrator with the “Allow user to switch enterprises” privilege can assign the following scopes:
When you create an enterprise, you must add a default scope for that enterprise, which Abiquo will suggest as the scope for new users. Note that the default scope is always available for selection, even if it is above the scope of the administrator creating the user. Therefore Abiquo recommends that the default scope should be lower than or equal to the administrator’s scope. When you edit the enterprise, you can change the default scope and the new value will be available when you subsequently create users.
When you create an enterprise, Abiquo automatically adds the new enterprise to your scope so you can manage it, for example, to add it to other scopes. And a higher-level administrator can later remove it from your scope.
Abiquo 4.0 also introduces scope hierarchies for resource sharing. A scope hierarchy is for sharing resources with related tenants without the need for the administrator to have all of these related tenants in their own scope. So administrators can share VM templates and VApp specs with tenants in child scopes beneath their own scope, but administrators manage only the tenants within their own scope.
The scope hierarchy feature is optional: you can just create a single level of scopes at the same level as the global scope as in previous versions of Abiquo. The scope hierarchy feature is also flexible, because an enterprise can belong to more than one scope, which means that an administrator could create an enterprise hierarchy for sharing, as well as more scopes for sharing templates of a specific type only with groups of tenants that will use those templates.
Access to shared resources is the same as in previous versions. All users whose enterprises are listed in the scopes of a shared resource can access that resource (VM template or VApp spec).
In Abiquo v4.0 the users who can administer shared resources have changed. The criteria are as follows:
An administrator with sharing permissions and unlimited scope can manage all scopes. An administrator with a limited scope can assign the following scopes:
To give an example of the tenant administrator, by default, tenant administrators do not have the Allow user to switch enterprises privilege. This means that they can only work with local resources in their own enterprise and Abiquo will not display the Scopes tab when they edit a template or spec.
An administrator with scope privileges and the “Allow user to switch enterprises” privilege can create a hierarchy by assigning a parent scope to any scope except an unlimited scope. An unlimited scope is the Global scope or a Use all enterprises or Use all datacenters scope.
The following diagram shows an example of a scope hierarchy.
The following screenshot shows an administrator that can manage two national resellers.
These resellers have customers, with their own departments, and the administrator does not manage their users but the administrator does share templates with them.
An administrator can belong to an enterprise that is not included in their own scope, which means that they cannot manage some elements of this enterprise, eg. they cannot create users. But an administrator will usually have access to the Apps library, which is determined by their Apps library privileges, allowed datacenters, and datacenter scope. And the administrator will be able to administer templates and specs when their enterprise is the owner of the resource. To share resources and manage shared resources, such as VM templates and VApp specs, with enterprises in their child scopes, an administrator will need access to the owner enterprise and the “Allow user to switch enterprises” privilege.