[pve-devel] [PATCH perl-rs v3 1/2] pve-rs: resource_scheduling: allow granular usage changes

[Daniel Kral]

On Thu Nov 13, 2025 at 10:30 AM CET, Daniel Kral wrote:
> On Wed Nov 12, 2025 at 11:49 AM CET, Thomas Lamprecht wrote:
>> Am 27.10.25 um 17:46 schrieb Daniel Kral:
>>> Needs a build dependency bump for
>>> librust-proxmox-resource-scheduling-dev and a versioned breaks for
>>> pve-ha-manager.
>>
>> The latter only due to the (signature) change to add_service_usage_to_node, or?
>> While versioned breaks can be done, if it's somewhat easy to avoid them it's
>> always better to do so, especially as it makes downgrades much easier 
>>
>> Can we keep backward compat without having to bend to
>> much backwards? E.g. adding a new method for the new more granular way while
>> keeping add_service_usage_to_node as is, like "record_service_usage_for_node" (or
>> just slap a 2 at the end of the method name is also a simple trick that, while not
>> beautiful, works and avoids bikeshedding).
>
> I'd go for that route, but the new `sid` parameter is needed to track on
> which node a service puts its load on, i.e. where we need to remove it
> later. That's information we didn't get before and we unfortunately
> cannot make it optional, e.g. shoving it in the already existing
> StaticNodeUsage as a Option<_> field. (Haven't tested it yet, but this
> shouldn't be an API break for perlmod?)
>
> Another approach would be to allow both the non-granular and granular
> behavior to coexist - at least for the 9.x series, even though it might
> be a little ugly, it's probably not too bad.
>
> What do you think?

As noted off-list, I've gone with staying the breaking change for v4
now, as there's no neet way to do this otherwise.