几个小时后，Google Cloud DataFlow作业会发出警报 [英] Google Cloud DataFlow job throws alert after few hours

问题描述

使用2.11.0版本运行DataFlow流作业.几个小时后，我收到以下身份验证错误:

Running a DataFlow streaming job using 2.11.0 release. I get the following authentication error after few hours:

File "streaming_twitter.py", line 188, in <lambda> 
File "streaming_twitter.py", line 102, in estimate 
File "streaming_twitter.py", line 84, in estimate_aiplatform 
File "streaming_twitter.py", line 42, in get_service 
File "/usr/local/lib/python2.7/dist-packages/googleapiclient/_helpers.py", line 130, in positional_wrapper return wrapped(*args, **kwargs) 
File "/usr/local/lib/python2.7/dist-packages/googleapiclient/discovery.py", line 227, in build credentials=credentials) 
File "/usr/local/lib/python2.7/dist-packages/googleapiclient/_helpers.py", line 130, in positional_wrapper return wrapped(*args, **kwargs) 
File "/usr/local/lib/python2.7/dist-packages/googleapiclient/discovery.py", line 363, in build_from_document credentials = _auth.default_credentials() 
File "/usr/local/lib/python2.7/dist-packages/googleapiclient/_auth.py", line 42, in default_credentials credentials, _ = google.auth.default() 
File "/usr/local/lib/python2.7/dist-packages/google/auth/_default.py", line 306, in default raise exceptions.DefaultCredentialsError(_HELP_MESSAGE) DefaultCredentialsError: Could not automatically determine credentials. Please set GOOGLE_APPLICATION_CREDENTIALS or explicitly create credentials and re-run the application. 

此数据流作业对AI平台预测执行API请求似乎是身份验证令牌即将到期.

This Dataflow job performs an API request to AI Platform prediction and seems to be Authentication token is expiring.

代码段:

def get_service():
    # If it hasn't been instantiated yet: do it now
    return discovery.build('ml', 'v1',
                           discoveryServiceUrl=DISCOVERY_SERVICE,
                           cache_discovery=True)

我尝试在服务功能中添加以下几行:

I tried adding the following lines to the service function:

    os.environ[
        "GOOGLE_APPLICATION_CREDENTIALS"] = "/tmp/key.json"

但是我得到了

DefaultCredentialsError: File "/tmp/key.json" was not found. [while running 'generatedPtransform-930']

我认为是因为文件不在DataFlow机器中.另一种选择是在构建方法中使用 developerKey 参数，但AI Platform预测似乎不支持该参数，但出现错误:

I assume because file is not in DataFlow machine. Other option is to use developerKey param in build method, but doesnt seems supported by AI Platform prediction, I get error:

Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project."> [while running 'generatedPtransform-22624']

要了解如何解决它以及最佳实践是什么?

Looking to understand how to fix it and what is the best practice?

有什么建议吗?

• 完整日志此处
• 完整代码此处

推荐答案

设置 os.environ ['GOOGLE_APPLICATION_CREDENTIALS'] ='/tmp/key.json'仅在DirectRunner本地运行.一旦部署到像Dataflow这样的分布式运行程序，每个工作人员将无法找到 local 文件/tmp/key.json .

Setting os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = '/tmp/key.json' only works locally with the DirectRunner. Once deploying to a distributed runner like Dataflow, each worker won't be able to find the local file /tmp/key.json.

如果希望每个工作人员使用一个特定的服务帐户，则可以告诉Beam使用哪个服务帐户来标识工作人员.

If you want each worker to use a specific service account, you can tell Beam which service account to use to identify workers.

首先，授予 roles/dataflow.要您的工作人员使用的服务帐户中的工作人员角色.无需下载服务帐户密钥文件:)

First, grant the roles/dataflow.worker role to the service account you want your workers to use. There is no need to download the service account key file :)

然后，如果要让 PipelineOptions 解析命令行参数，则只需使用

Then if you're letting PipelineOptions parse your command line arguments, you can simply use the service_account_email option, and specify it like --service_account_email [e-mail] when running your pipeline.

您的 GOOGLE_APPLICATION_CREDENTIALS 指向的服务帐户仅用于开始作业，但是每个工作人员都使用 service_account_email 指定的服务帐户.如果未传递 service_account_email ，则默认为来自 GOOGLE_APPLICATION_CREDENTIALS 文件的电子邮件.

The service account pointed by your GOOGLE_APPLICATION_CREDENTIALS is simply used to start the job, but each worker uses the service account specified by the service_account_email. If a service_account_email is not passed, it defaults to the email from your GOOGLE_APPLICATION_CREDENTIALS file.

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