使用 Google Cloud 功能在 Google Cloud 上禁用计费（按键错误：“数据”）

Question

我正在尝试编写一个 Google Cloud 函数来设置上限以禁用超过特定限制的使用。我按照此处的说明操作：https://cloud.google.com/billing/docs/how-to/notify#cap_disable_billing_to_stop_usage。

这就是我的云函数的样子（我只是从上面链接的 Google Cloud 文档页面复制并粘贴）：

import base64
import json
import os
from googleapiclient import discovery
from oauth2client.client import GoogleCredentials
PROJECT_ID = os.getenv('GCP_PROJECT')
PROJECT_NAME = f'projects/{PROJECT_ID}'
def stop_billing(data, context):
    pubsub_data = base64.b64decode(data['data']).decode('utf-8')
    pubsub_json = json.loads(pubsub_data)
    cost_amount = pubsub_json['costAmount']
    budget_amount = pubsub_json['budgetAmount']
    if cost_amount <= budget_amount:
        print(f'No action necessary. (Current cost: {cost_amount})')
        return

    billing = discovery.build(
        'cloudbilling',
        'v1',
        cache_discovery=False,
        credentials=GoogleCredentials.get_application_default()
    )

    projects = billing.projects()

    if __is_billing_enabled(PROJECT_NAME, projects):
        print(__disable_billing_for_project(PROJECT_NAME, projects))
    else:
        print('Billing already disabled')


def __is_billing_enabled(project_name, projects):
    """
    Determine whether billing is enabled for a project
    @param {string} project_name Name of project to check if billing is enabled
    @return {bool} Whether project has billing enabled or not
    """
    res = projects.getBillingInfo(name=project_name).execute()
    return res['billingEnabled']


def __disable_billing_for_project(project_name, projects):
    """
    Disable billing for a project by removing its billing account
    @param {string} project_name Name of project disable billing on
    @return {string} Text containing response from disabling billing
    """
    body = {'billingAccountName': ''}  # Disable billing
    res = projects.updateBillingInfo(name=project_name, body=body).execute()
    print(f'Billing disabled: {json.dumps(res)}')

还附上 Google Cloud Function UI 上的屏幕截图：

我还附上了一张屏幕截图，以显示我也将相关内容复制并粘贴到了

requirements.txt

文件中。

但是当我去测试代码时，它给了我一个错误：

Expand all | Collapse all{
 insertId: "000000-69dce50a-e079-45ed-b949-a241c97fdfe4"  
 labels: {…}  
 logName: "projects/stanford-cs-231n/logs/cloudfunctions.googleapis.com%2Fcloud-functions"  
 receiveTimestamp: "2020-02-06T16:24:26.800908134Z"  
 resource: {…}  
 severity: "ERROR"  
 textPayload: "Traceback (most recent call last):
  File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 383, in run_background_function
    _function_handler.invoke_user_function(event_object)
  File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 217, in invoke_user_function
    return call_user_function(request_or_event)
  File "/env/local/lib/python3.7/site-packages/google/cloud/functions/worker.py", line 214, in call_user_function
    event_context.Context(**request_or_event.context))
  File "/user_code/main.py", line 9, in stop_billing
    pubsub_data = base64.b64decode(data['data']).decode('utf-8')
KeyError: 'data'
"  
 timestamp: "2020-02-06T16:24:25.411Z"  
 trace: "projects/stanford-cs-231n/traces/8e106d5ab629141d5d91b6b68fb30c82"  
}

知道为什么吗？

相关 Stack Overflow 帖子：https://stackoverflow.com/a/58673874/3507127

Answer 1

Google 提供的代码似乎有错误。当我更改

stop_billing

功能时，它就可以工作了：

def stop_billing(data, context):
    if 'data' in data.keys():
        pubsub_data = base64.b64decode(data['data']).decode('utf-8')
        pubsub_json = json.loads(pubsub_data)
        cost_amount = pubsub_json['costAmount']
        budget_amount = pubsub_json['budgetAmount']
    else:
        cost_amount = data['costAmount']
        budget_amount = data['budgetAmount']
    if cost_amount <= budget_amount:
        print(f'No action necessary. (Current cost: {cost_amount})')
        return    
    if PROJECT_ID is None:
        print('No project specified with environment variable')
        return
    billing = discovery.build('cloudbilling', 'v1', cache_discovery=False, )
    projects = billing.projects()
    billing_enabled = __is_billing_enabled(PROJECT_NAME, projects)
    if billing_enabled:
        __disable_billing_for_project(PROJECT_NAME, projects)
    else:
        print('Billing already disabled')

问题在于 pub/sub 消息以 json 消息的形式提供输入，其中包含 base64 编码的“数据”条目。在测试功能中，您提供不带“数据”键且不对其进行编码的 json 条目。这是在我上面重写的函数中检查的。

Answer 2

我推荐这个分步视频教程。 https://www.youtube.com/watch?v=51dwW1j7pho

正如作者后来指出的，只有在云函数配置内部测试云函数时才会出现此错误。 如果你通过手动发布消息到Pub Sub来测试（如18:30左右的视频所示）