从Nixops1.7迁移到2.0和从<deployment>.nix迁移到nixops.nix

Question

我尝试将我的nixops从版本1.7迁移到nixops_unstable 2.0.0-pre7220cbd。在安装nixops_unstable之后，我不能再使用nixops命令了：

$ nixops deploy -d streaming
Traceback (most recent call last):
  File "/nix/store/diamr11y34lkmnjwkyw5qnv5xcn1x60h-python3.9-nixops-2.0.0-pre-7220cbd/bin/.nixops-wrapped", line 9, in 
    sys.exit(main())
  File "/nix/store/3ybyi0v3pj8hlchzcchsx3m2myjpbmir-python3-3.9.13-env/lib/python3.9/site-packages/nixops/__main__.py", line 56, in main
    args.op(args)
  File "/nix/store/3ybyi0v3pj8hlchzcchsx3m2myjpbmir-python3-3.9.13-env/lib/python3.9/site-packages/nixops/script_defs.py", line 710, in op_deploy
    with deployment(args, True, "nixops deploy") as depl:
  File "/nix/store/gwlgfywzqypv91rxw916v81mpzhckdz5-python3-3.9.13/lib/python3.9/contextlib.py", line 119, in __enter__
    return next(self.gen)
  File "/nix/store/3ybyi0v3pj8hlchzcchsx3m2myjpbmir-python3-3.9.13-env/lib/python3.9/site-packages/nixops/script_defs.py", line 72, in deployment
    with network_state(args, writable, description=activityDescription) as sf:
  File "/nix/store/gwlgfywzqypv91rxw916v81mpzhckdz5-python3-3.9.13/lib/python3.9/contextlib.py", line 119, in __enter__
    return next(self.gen)
  File "/nix/store/3ybyi0v3pj8hlchzcchsx3m2myjpbmir-python3-3.9.13-env/lib/python3.9/site-packages/nixops/script_defs.py", line 102, in network_state
    network = eval_network(get_network_file(args))
  File "/nix/store/3ybyi0v3pj8hlchzcchsx3m2myjpbmir-python3-3.9.13-env/lib/python3.9/site-packages/nixops/script_defs.py", line 60, in get_network_file
    raise ValueError(f"Neither flake.nix nor nixops.nix exists in {network_dir}")
ValueError: Neither flake.nix nor nixops.nix exists in /home/matthias/nixops

我想这里最重要的部分是ValueError: Neither flake.nix nor nixops.nix exists in /home/matthias/nixops。这是正确的，我从来没有nixops.nix，但是这个部署是用/home/matthias/nixops/streaming.nix定义的。

目前，我不想迁移到使用片上，我只是尝试使用nixops_unstable的现有方式。

将streaming.nix更改为nixops.nix不起作用，可能是因为它无法将其现有状态与这个新文件名相关联，因为该文件实际上是nixop状态的一部分：

{
  "c54b29a1-417e-11eb-9873-0242cc6606ab": {
    "configsPath": "/nix/store/46s4g876yjdijfdjwpqqjzj94pyp05lz-nixops-machines", 
    "name": "streaming", 
    "nixExprs": "[\"/home/matthias/nixops/streaming.nix\"]", 
    "resources": {
      "styx": {
        "configsPath": "/nix/store/46s4g876yjdijfdjwpqqjzj94pyp05lz-nixops-machines", 
        "creationTime": "1608329862", 
        "index": "0", 
        "keys": "XXXXXXXX", 
        "none.sshPrivateKey": "XXXXXXXX\n", 
        "none.sshPublicKey": "XXXXXXXX", 
        "none.sshPublicKeyDeployed": "1", 
        "publicVpnKey": "XXXXXXXX", 
        "sshPinged": "1", 
        "state": "3", 
        "stateVersion": "20.09", 
        "targetHost": "styx.p7m.de", 
        "toplevel": "/nix/store/hjlv7mlp71rij4vn3dhvr6rxickldjaa-nixos-system-styx-22.05.915.9ff91ce2e4c", 
        "type": "none", 
        "vmId": "nixops-c54b29a1-417e-11eb-9873-0242cc6606ab-styx"
      }
    }, 
    "rollbackEnabled": "1"
  }
}

我发现的关于迁移的文档非常稀少：https://nixops.readthedocs.io/en/latest/manual/migrating.html。我只能或多或少地发现，我必须定义network.storage.legacy = {}，这并不能解决我的迁移问题。

如何从.nix转换为nixops.nix？如何区分用于对类似服务器进行分组的不同部署？

Answer 1

通过对每个部署执行以下步骤完成了转换：

1. 我将文件${deploymentname}.nix移到${deploymentname}/nixops.nix
2. 我使用nixops1.7：nixops export -d ${deploymentname} > ${deploymentname}/state.json导出所有状态
3. 我从步骤1更新了移动文件在${deploymentname}.json文件中的位置(该文件位于nixExprs键上)
4. 我更新了${deploymentname}/nixops.nix中的配置，它使用相对路径引用外部文件。
5. 我使用nixops2.0：cd ${deploymentname}/ ; nixops import < ${deploymentname}.json导入状态
6. 我重新部署：nixops deploy -d ${deploymentname}