def METHOD_NAME():
    bastion_node = get_bastion_node(auth=False)
    prepare_private_registry(bastion_node, RANCHER_K3S_VERSION)
    ag_nodes = prepare_airgap_k3s(bastion_node, NUMBER_OF_INSTANCES,
                                  'system_default_registry')
    server_ops = K3S_SERVER_OPTIONS + " --system-default-registry={}".format(
        bastion_node.host_name)
    agent_ops = K3S_AGENT_OPTIONS
    deploy_airgap_cluster(bastion_node, ag_nodes, "k3s", server_ops, agent_ops)