if err != nil {
		return nil, err
	}
	if container == nil {
		return nil, fmt.Errorf("container not found (%q)", containerName)
	}
	// TODO(tallclair): Pass a proper timeout value.
	return kl.runner.RunInContainer(ctx, container.ID, cmd, 0)
}

// GetExec gets the URL the exec will be served from, or nil if the Kubelet will serve it.