---- On Thu, 12 Jun 2025 22:04:29 -0700 Thamanna Farhath <thamanna.f@zybisys.com> wrote ---
> Hi Team,
>
> As part of enhancing our OpenStack RBAC policy management, we are in the process of setting up custom roles for various admin-related activities.
>
> Custom Roles Used: admin_instance_read,admin_volume_read,admin_network_read,admin_glance_read
> Policy Customizations:
>
> # Compute - List all instances across tenants"os_compute_api:servers:index:get_all_tenants": "rule:context_is_admin or role:admin_instance_read""os_compute_api:servers:detail:get_all_tenants": "rule:context_is_admin or role:admin_instance_read"# Network - Get networks (shared/external/own project)"get_network": "(rule:admin_only) or (role:reader and project_id:%(project_id)s) or rule:shared or rule:external or rule:context_is_advsvc or role:admin_network_read"# Volume - List all volumes and snapshots across projects"volume:get_all": "rule:xena_system_admin_or_project_reader or role:admin_volume_read""volume:get_all_snapshots": "rule:xena_system_admin_or_project_reader or role:admin_volume_read"# Image - List all images including shared/community/public"get_image": "role:admin or (role:reader and project_id:%(project_id)s) or project_id:%(member_id)s or 'community':%(visibility)s or 'public':%(visibility)s or 'shared':%(visibility)s or role:admin_glance_read""get_images": "role:admin or (role:reader and project_id:%(project_id)s) or role:admin_glance_read"
> Issue:
>
> Despite the above configurations, listing all instances, images, volumes, and networks across all projects still only works for the admin role. The custom roles (e.g., admin_instance_read, etc.) are not taking effect for cross-project visibility as expected.
>

What error or instances list do you get for 'admin_instance_read' ?

If policy is allowed as per customer override, then compute allowsthe user to list cross-project instances but I will
suggest to remove the admin access from policy and try how it behaves:

# Compute - List all instances across tenants
"os_compute_api:servers:index:get_all_tenants": "role:admin_instance_read"
"os_compute_api:servers:detail:get_all_tenants": "role:admin_instance_read"

> Request:
>
> I would appreciate any suggestions or insights on:
>
> Whether additional policy bindings or role scopes are required.
>
>
> If any service-specific constraints might be overriding the custom roles.
>
>
> Any known limitations regarding get_all_tenants behavior with custom roles.

Can you list the command/API you are trying to list all instance?

In compute, along with project-id filter you need to pass '--all-tenants' filter also, otherwise nova will always
return requested user instances only.

-gmaan

>
>
>
>
> Thanks & Regards
> Thamanna Farhath N
> Associate engineer - R&D
> Zybisys IT consulting
>
>
>
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