更改密码后Azure ChainedTokenCredential失败

Question

更改密码后，Azure ChainedTokenCredential本地开发失败。我已经使用ChainedTokenCredential在Azure中使用ManagedIdentityCredential和DefaultAzureCredential在本地测试我的函数应用程序了好几个星期。一切都很顺利。下面是一个代码示例，它在Azure中正常工作，但在本地不起作用

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，从那以后我得到了以下错误

[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, 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'.
[2021-04-19T15:18:07.147Z] 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, 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'.
[2021-04-19T15:18:07.241Z] 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'

我试图解决这个问题的事情：

1. 登录和注销VSCode Azure扩展
2. 登录和注销az cli
3. az account clear
4. 正在清除浏览器缓存
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是如何获得我的证书的。我相信它是存储在本地的，因为我在运行调试器时没有登录到Azure扩展时会遇到相同的错误。我以为DefaultAzureCredential会以我的身份使用我的Azure扩展登录进行身份验证，但我不确定

任何帮助都将不胜感激

Answer 1

这个问题是通过使用@Charles Lowell的解决方案解决的。由于使用fzf.exe（模糊查找工具），我在查找该文件时遇到问题，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

我发现的另一种选择是使用VisualStudioCodeCredential()而不是DefaultAzureCredential()。这将使用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。我很高兴能开始工作

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

Answer 2

在az account clear之后，您需要使用最新密码az login，您可以登录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