def isos
      volumes = @compute_resource.images_by_storage('iso',params[:storage])
      respond_to do |format|
        format.json { render :json => volumes }
      end
    end
def isos
      volumes = @compute_resource.images_by_storage('iso',params[:storage])
      respond_to do |format|
        format.json { render :json => volumes }
      end
    end
GET foreman_fog_proxmox/isos/:storage