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IAM-backed ObjectStores generate wildcard Secret RBAC

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@martinohansen 已经在做这个了。

开始于 2026年5月7日。

  • #893 来自 @martinohansen —— 未关闭

评估

难度
3/5
预计耗时
1-2 天
新手友好度
64/100
Issue 类型
缺陷
描述清晰度
描述清楚
活跃度
冷清
技术栈
aws, go, kubernetes

调研方向

从 Role 生成和 AWS 凭据引用收集路径开始,然后将其与现有的 Azure 默认/托管身份处理进行比较。验证 IAM 继承情况和显式凭据 Secret 情况,并添加或更新测试,使完成条件为:对于空集合没有 Secret 规则,而当存在 Secret 名称时有一条限定范围的规则。

由索引模型根据 Issue 内容生成。

描述

bug
Summary

When an ObjectStore uses AWS IAM role inheritance (inheritFromIAMRole: true) and does not reference any credential Secrets, the generated <cluster>-barman-cloud Role still contains a secrets rule with no resourceNames.

In Kubernetes RBAC, an omitted or empty resourceNames list does not restrict the rule to no objects; it allows the verbs on all resources of that type. As a result, an IAM-backed barman-cloud instance can get/list/watch every Secret in the namespace even though barman-cloud does not need any Secret for the AWS credential chain.

Why this matters

Deployments using IRSA, pod identity, or IMDS typically set inheritFromIAMRole: true so barman-cloud gets credentials from the pod environment. In that mode, barman-cloud returns before reading AWS credential Secret references, so the plugin should not grant Secret access unless a credential Secret is actually needed.

Expected behavior

If no credential Secret names are collected for the ObjectStores referenced by a cluster, the generated Role should not include a secrets rule. For AWS credentials with inheritFromIAMRole: true, AWS Secret references should be ignored the same way Azure default/managed identity credentials are ignored today.

Actual behavior

The Role includes a secrets rule with an empty resourceNames field, which grants access to all Secrets in the namespace.

Proposed fix
  • Skip AWS credential Secret references when inheritFromIAMRole is true.
  • Omit the generated secrets PolicyRule when the collected Secret name set is empty.
  • Keep the existing scoped secrets rule when explicit credential Secret refs are present.
主要语言
Go
星标
198
派生
81
平均合并
2 天 6 小时
30 天内合并 PR
19

环境准备

  • 没有 Dockerfile 或 Docker Compose 文件
  • 没有 Pull Request 模板
  • 阅读贡献指南

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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