Google Cloud Datastore Emulator不使用默认凭据

问题描述 投票:2回答:2

根据Google's Cloud Datastore Emulator installation instructions,我能够在bash终端窗口中安装和运行模拟器而没有gcloud beta emulators datastore start --project gramm-id的问题。

我还在per the instructions的另一个终端设置了环境变量$(gcloud beta emulators datastore env-init)并验证了它们的定义。

但是,当我运行我的python脚本以使用以下代码将实体添加到本地数据存储区时:

from google.cloud import datastore

print(os.environ['DATASTORE_HOST'])          # output: http://localhost:8081
print(os.environ['DATASTORE_EMULATOR_HOST']) # output: localhost:8081


client = datastore.Client('gramm-id')
kind = 'Task'
name = 'simpleTask'

task_key = client.key(kind, name)
task = client.Enity(key=task_key)
task['description'] = 'Buy milk'
client.put(task)

我收到错误:

Traceback (most recent call last):
  File "tools.py", line 237, in <module>
    client = datastore.Client('gramm-id')
  File "/home/.../lib/python3.6/site-packages/google/cloud/datastore/client.py", line 205, in __init__
    project=project, credentials=credentials, _http=_http)
... long stack trace ....
  File "/home/.../lib/python3.6/site-packages/google/auth/_default.py", line 306, in default
    raise exceptions.DefaultCredentialsError(_HELP_MESSAGE)
google.auth.exceptions.DefaultCredentialsError: Could not automatically determine credentials. Please set GOOGLE_APPLICATION_CREDENTIALS or explicitly create credentials and re-run the application. For more information, please see https://developers.google.com/accounts/docs/application-default-credentials.

我认为我不需要create a GCP service account and provide access credentials在我的机器上使用数据存储模拟器。

我的系统:

  • Ubuntu 18.04
  • Anaconda python 3.6.6
  • Google Cloud SDK 215.0.0
  • cloud-datastore-emulator 2.0.2。

我错过了什么?

python google-cloud-platform google-cloud-datastore
2个回答
5
投票

gcloud auth application-default login

这将提示您通过浏览器窗口登录,并为您正确设置GOOGLE_APPLICATION_CREDENTIALS。 [1]


0
投票

从理论上讲,你应该可以使用模拟凭证,例如:

class EmulatorCreds(google.auth.credentials.Credentials):

    def __init__(self):
        self.token = b'secret'
        self.expiry = None

    @property
    def valid(self):
        return True

    def refresh(self, _):
        raise RuntimeError('Should never be refreshed.')

client = datastore.Client(
    project='gramm-id',
    credentials=EmulatorCreds() , 
    _http=requests.Session()  # Un-authorized
)

然而it seems like this doesn't currently work,所以现在你需要设置GOOGLE_APPLICATION_CREDENTIALS

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