将gcloud服务帐户限制为特定存储桶

Question

我有2个桶，prod和staging，我有一个服务帐户。我想限制此帐户只能访问暂存存储桶。现在我在https://cloud.google.com/iam/docs/conditions-overview上看到这应该是可能的。我创建了这样的policy.json

{
  "bindings": [
    {
      "role": "roles/storage.objectCreator",
      "members": "serviceAccount:[email protected]",
      "condition": {
        "title": "staging bucket only",
        "expression": "resource.name.startsWith(\"projects/_/buckets/uploads-staging\")"
      }
    }
  ]
}

但当我解雇gcloud projects set-iam-policy lalala policy.json我得到：

The specified policy does not contain an "etag" field identifying a
specific version to replace. Changing a policy without an "etag" can
overwrite concurrent policy changes.

Replace existing policy (Y/n)?

ERROR: (gcloud.projects.set-iam-policy) INVALID_ARGUMENT: Can't set conditional policy on policy type: resourcemanager_projects and id: /lalala

我觉得我误解了角色，政策和服务帐户是如何相关的。但无论如何：是否有可能以这种方式限制服务帐户？

Answer 1

以下评论，我能够解决我的问题。显然存储桶权限在某种程度上是特殊的，但是我能够使用gsutil在存储桶上设置一个允许我的用户访问的策略：

gsutils iam ch serviceAccount:[email protected]:objectCreator gs://lalala-uploads-staging

解雇之后，访问是按预期的。我发现这有点令人困惑，这不会反映在服务帐户政策上：

% gcloud iam service-accounts get-iam-policy [email protected]
etag: ACAB

感谢大家