func()

in pkg/virtualgateway/membership_designator.go [40:71]

• 29 lines of code
• 8 McCabe index (conditional complexity)

func (d *membershipDesignator) DesignateForPod(ctx context.Context, pod *corev1.Pod) (*appmesh.VirtualGateway, error) {

	// see https://github.com/kubernetes/kubernetes/issues/88282 and https://github.com/kubernetes/kubernetes/issues/76680
	req := webhook.ContextGetAdmissionRequest(ctx)
	vgList := appmesh.VirtualGatewayList{}
	if err := d.k8sClient.List(ctx, &vgList, client.InNamespace(req.Namespace)); err != nil {
		return nil, errors.Wrap(err, "failed to list VirtualGateways in cluster")
	}

	var vgCandidates []*appmesh.VirtualGateway
	for _, vgObj := range vgList.Items {
		selector, err := metav1.LabelSelectorAsSelector(vgObj.Spec.PodSelector)
		if err != nil {
			return nil, err
		}
		if selector.Matches(labels.Set(pod.Labels)) {
			vgCandidates = append(vgCandidates, vgObj.DeepCopy())
		}
	}
	if len(vgCandidates) == 0 {
		return nil, nil
	}
	if len(vgCandidates) > 1 {
		var vgCandidatesNames []string
		for _, vg := range vgCandidates {
			vgCandidatesNames = append(vgCandidatesNames, k8s.NamespacedName(vg).String())
		}
		return nil, errors.Errorf("found multiple matching VirtualGateways for pod %s: %s",
			k8s.NamespacedName(pod).String(), strings.Join(vgCandidatesNames, ","))
	}
	return vgCandidates[0], nil
}