KEP-3619: implement features.supplemental_groups_policy in RuntimeStatus

Signed-off-by: Shingo Omura <everpeace@gmail.com>

internal/cri/server/service.go

@@ -156,6 +156,8 @@ type criService struct {
 	sandboxService sandboxService
 	// runtimeHandlers contains runtime handler info
 	runtimeHandlers []*runtime.RuntimeHandler
+	// runtimeFeatures container runtime features info
+	runtimeFeatures *runtime.RuntimeFeatures
 }
 
 type CRIServiceOptions struct {
@@ -244,6 +246,10 @@ func NewCRIService(options *CRIServiceOptions) (CRIService, runtime.RuntimeServi
 		return nil, nil, fmt.Errorf("failed to introspect runtime handlers: %w", err)
 	}
 
+	c.runtimeFeatures = &runtime.RuntimeFeatures{
+		SupplementalGroupsPolicy: true,
+	}
+
 	return c, c, nil
 }
 

internal/cri/server/status.go

@@ -58,6 +58,7 @@ func (c *criService) Status(ctx context.Context, r *runtime.StatusRequest) (*run
 			networkCondition,
 		}},
 		RuntimeHandlers: c.runtimeHandlers,
+		Features:        c.runtimeFeatures,
 	}
 	if r.Verbose {
 		configByt, err := json.Marshal(c.config)