Konnect entities: Gateway Control Plane Group - Control Plane Group Memberships

[pmalek]

Problem statement

Introduce ControlPlane group membership for KonnectControlPlane.

For details see https://docs.google.com/document/d/1TxW2ovqPRm-w1td1e_V0CyaET4lpiEBCJ7hiYMZJqng/edit#heading=h.i2q1r7wb62uu

Proposed solution

• Introduce ControlPlane group membership for KonnectControlPlane.

Prerequisites

• Konnect entities: KonnectControlPlane CRD #432
• PUT for CP group membership
  • https://kongstrong.slack.com/archives/C03LRB400TC/p1719493489848099, getting 404 even though implemented via https://github.com/Kong/koko-private/pull/3754 and https://github.com/Kong/koko-private/pull/3772

Acceptance criteria

• KGO can set ControlPlane group membership on Konnect's ControlPlanes.

[pmalek]

Blocked by lacking KHCP changes (details in linked slack thread).

[pmalek]

KHCP ticket in progress: https://konghq.atlassian.net/browse/KHCP-13304

[pmalek]

https://github.com/Kong/khcp/pull/8011 implemented support for empty arrays.

There's an investigation ongoing checking why allowing empty arrays doesn't work :

curl  -H 'Content-Type: application/json' -H "Authorization: Bearer ${KONNECT_TOKEN}" -XPUT https://eu.api.konghq.tech/v2/control-planes/xxxxxxxxxxxxxx/group-memberships --data '{"members":[]}'
{"status":400,"title":"Invalid Request","instance":"kong:trace:15106412113331495426","detail":"Invalid Parameters","invalid_parameters":[{"field":"members","rule":"array_not_empty","choices":[],"reason":"members should not be empty"}]}%

[pmalek]

This has now been fixed https://github.com/Kong/khcp/pull/8014 and deployed to dev.