RFC 024: ResourcePatchPolicy for soperator#2610
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Problem
Soperator exposes only a curated subset of the K8s API for its generated resources (StatefulSet, DaemonSet, Service, ConfigMap…). Advanced users can't tweak them (annotations, tolerations, limits, hostNetwork) without requesting a new API field, forking, or fragile post-hoc patching that gets reverted on reconcile.
Solution
Adds the experimental ResourcePatchPolicy CRD (slurm.nebius.ai/v1alpha1) — a declarative escape hatch inspired by Envoy Gateway's EnvoyPatchPolicy.
JSON Patch (RFC 6902) and JSON Merge Patch (RFC 7386) applied in-memory to generated resources before submit, re-applied every reconcile.
targetRef for SlurmCluster | NodeSet | NodeConfigurator; selection by kind + exact name; priority ordering; protected-field guards (name/namespace/ownerReferences/selector).
Status controller reports an Accepted condition; opt-in via controllersEnabled.resourcepatchpolicy (off by default).
Testing
Engine unit tests, render-level tests against the real controller/worker/node-configurator resources, and controller tests (fake client). go build, go vet, make lint and affected tests pass. Verified manually on a cluster.
Release Notes
Feature: Added the experimental ResourcePatchPolicy CRD to patch operator-generated resources via JSON Patch / JSON Merge Patch, without forking. Opt-in (controllersEnabled.resourcepatchpolicy: true); permanently v1alpha1.