Move Inventory.Item.Board from Redfish Chassis to Redfish Assembly

[Ed Tanous]

On Wed, Apr 28, 2021 at 9:18 AM Gunnar Mills <gmills at linux.vnet.ibm.com> wrote:
>
>  From some discussion on Discord a few weeks ago. A newer way of
> thinking in Redfish is for a simple rack server to just have one Redfish
> Chassis and things like boards modeled as Redfish Assemblies under the
> Chassis.[1][2] Today we look for inventory item chassis and inventory
> item board[3] to populate the Chassis collection.[4] I propose we move
> the "Inventory.Item.Board" from Redfish Chassis to Redfish Assembly.
> Does this break anyone?

This will definitely break people, given that sensors can be attached
to boards today, and (unless I'm mistaken) Assemblies don't have their
own sensors.  Is there a solution to the sensor issue baked into this
proposal?

> Does anyone have an inventory item board that
> can't be a Redfish Assembly?
>
> Another option would be to only move certain inventory item boards to
> Redfish Assembly, determined by a BoardType or additional more detailed
> Inventory Item interfaces around boards. Unless this is needed though
> would prefer the former for simplicity.

I wouldn't be for this option for the same reasons you do.

>
> https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/39574 is adding
> the Assembly schema. This would be a later commit moving
> "Inventory.Item.Board".
>
> [1]https://redfish.dmtf.org/redfish/mockups/v1/1018
> [2]https://redfishforum.com/thread/325/fru-properties-redfish
>
> [3]https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/xyz/openbmc_project/Inventory/Item/Board.interface.yaml
>
> [4]https://github.com/openbmc/bmcweb/blob/8d1b46d7f8d39db2ba048f9e9007106ca3a28c9b/redfish-core/lib/chassis.hpp#L189
>
> https://redfish.dmtf.org/schemas/v1/Chassis.v1_15_0.json
> https://redfish.dmtf.org/schemas/v1/Assembly.v1_3_0.json
>
> Thanks,
> Gunnar