更改密码后 Azure ChainedTokenCredential 失败

编程问答 2022-05-10

问题描述

Azure ChainedTokenCredential 更改密码后本地开发失败。我已经使用 ChainedTokenCredential 数周来在 Azure 中使用 ManagedIdentityCredential 进行身份验证，并使用 DefaultAzureCredential 对我的 Function App 进行本地测试。一切都按预期进行。这是一个在 Azure 中有效但在本地仍有效的代码示例。

def get_client():

    MSI_credential = ManagedIdentityCredential()
    default_credential = DefaultAzureCredential()
    credential_chain = ChainedTokenCredential(MSI_credential,default_credential)

    storageurl = os.environ["STORAGE_ACCOUNT"]

    client = BlobServiceClient(storageurl,credential=credential_chain)
    return client

上周我不得不更改我的密码，从那时起我收到以下错误。

[2021-04-19T15:18:06.931Z] SharedTokenCacheCredential.get_token Failed: Azure Active Directory error '(invalid_grant) AADSTS50173: The provided grant has expired due to it being revoked,a fresh auth token is needed. The user might have changed or reset their password. The grant was issued on '2021-02-08T20:05:01.4240000Z' and the TokensValidFrom date (before which tokens are not valid) for this user is '2021-04-15T15:49:33.0000000Z'.
[2021-04-19T15:18:06.963Z] Trace ID: xxx
[2021-04-19T15:18:06.972Z] Correlation ID: xxx
[2021-04-19T15:18:06.974Z] Timestamp: 2021-04-19 15:17:46Z'
[2021-04-19T15:18:06.977Z] DefaultAzureCredential.get_token Failed: SharedTokenCacheCredential raised unexpected error "Azure Active Directory error '(invalid_grant) AADSTS50173: The provided grant has expired due to it being revoked,a fresh auth token is needed. The user might have changed or reset their password. The grant was issued on '2021-02-08T20:05:01.4240000Z' and the TokensValidFrom date (before which tokens are not valid) for this user is '2021-04-15T15:49:33.0000000Z'.
[2021-04-19T15:18:07.014Z] Trace ID: xxx
[2021-04-19T15:18:07.040Z] Correlation ID: 
[2021-04-19T15:18:07.046Z] Timestamp: 2021-04-19 15:17:46Z'"
[2021-04-19T15:18:07.061Z] DefaultAzureCredential Failed to retrieve a token from the included credentials.
Attempted credentials:
        EnvironmentCredential: EnvironmentCredential authentication unavailable. Environment variables are not fully configured.
        ManagedIdentityCredential: ManagedIdentityCredential authentication unavailable,no managed identity endpoint found.
        SharedTokenCacheCredential: Azure Active Directory error '(invalid_grant) AADSTS50173: The provided grant has expired due to it being revoked,a fresh auth token is needed. The user might have changed or reset their password. The grant was issued on '2021-02-08T20:05:01.4240000Z' and the TokensValidFrom date (before which tokens are not valid) for this user is '2021-04-15T15:49:33.0000000Z'.
[2021-04-19T15:18:07.094Z] Trace ID: xxx
[2021-04-19T15:18:07.097Z] Correlation xxx
[2021-04-19T15:18:07.108Z] Timestamp: 2021-04-19 15:17:46Z'
[2021-04-19T15:18:07.111Z] ChainedTokenCredential.get_token Failed: DefaultAzureCredential raised unexpected error "DefaultAzureCredential Failed to retrieve a token from the included credentials.
Attempted credentials:
        EnvironmentCredential: EnvironmentCredential authentication unavailable. Environment variables are not fully configured.
        ManagedIdentityCredential: ManagedIdentityCredential authentication unavailable,a fresh auth token is needed. The user might have changed or reset their password. The grant was issued on '2021-02-08T20:05:01.4240000Z' and the TokensValidFrom date (before which tokens are not valid) for this user is '2021-04-15T15:49:33.0000000Z'.
[2021-04-19T15:18:07.147Z] Trace ID: xxx
[2021-04-19T15:18:07.181Z] Correlation ID: xxx
[2021-04-19T15:18:07.195Z] Timestamp: 2021-04-19 15:17:46Z'"
[2021-04-19T15:18:07.201Z] ChainedTokenCredential Failed to retrieve a token from the included credentials.
Attempted credentials:
        ManagedIdentityCredential: ManagedIdentityCredential authentication unavailable,no managed identity endpoint found.
        DefaultAzureCredential: DefaultAzureCredential Failed to retrieve a token from the included credentials.
Attempted credentials:
        EnvironmentCredential: EnvironmentCredential authentication unavailable. Environment variables are not fully configured.
        ManagedIdentityCredential: ManagedIdentityCredential authentication unavailable,a fresh auth token is needed. The user might have changed or reset their password. The grant was issued on '2021-02-08T20:05:01.4240000Z' and the TokensValidFrom date (before which tokens are not valid) for this user is '2021-04-15T15:49:33.0000000Z'.
[2021-04-19T15:18:07.241Z] Trace ID: xxx
[2021-04-19T15:18:07.264Z] Correlation ID: xxx
[2021-04-19T15:18:07.303Z] Timestamp: 2021-04-19 15:17:46Z'

我尝试解决的问题：

  1. 登录和注销 VSCode Azure 扩展
  2. 登录和退出az cli
  3. az account clear
  4. 清除浏览器缓存。
  5. 重新启动 PC 和 VSCode。
  6. 清除 VSCode 缓存
    • C:\Users\<user>\AppData\Roaming\Code\Cache
    • C:\Users\<user>\AppData\Roaming\Code\CacheData

我正在使用 Azure 扩展“附加到 Python 函数”来运行调试器。我不确定 DefaultAzureCredential 如何获得我的凭据。我相信它存储在本地，因为我在未登录 Azure 扩展的情况下运行调试器时遇到相同的错误。我以为 DefaultAzureCredential 会使用我的 Azure 扩展登录作为我进行身份验证，但我不确定。

任何帮助将不胜感激！

解决方法

在az account clear之后，您需要az login使用您的最新密码，您可以使用该密码登录azure portal。

DefaultAzureCredential 基于 Azure Identity 客户端库。您可以使用

跳过共享缓存 
default_credential = DefaultAzureCredential(exclude_shared_token_cache_credential=True)

并尝试通过 Azure CLI 进行身份验证。

,

问题已通过使用@Charles Lowell 的解决方案解决。由于使用 fzf.exe（模糊查找工具），我无法找到该文件，并且默认情况下它不会在隐藏文件夹中查找。删除 C:\Users\<user>\AppData\Local\.IdentityService\msal.cache 有效。

我发现另一种方法是使用 VisualStudioCodeCredential() 而不是 DefaultAzureCredential()。这使用 vscode 扩展进行身份验证。我更喜欢这种方法，但并非所有开发人员都使用 VSCode。我很高兴让 DefaultAzureCredential 工作。

def get_client():

    MSI_credential = ManagedIdentityCredential()
    vscode_credential = VisualStudioCodeCredential()
    credential_chain = ChainedTokenCredential(MSI_credential,vscode_credential)

有关 DefaultAzureCredential() 的更多信息，请参见 here。

谢谢大家！

azureazureazureazure-identitypythonvisual-studio-code