Widget with AWS Costs

[tigpt]

Picking on @diego7marques projecto that have AWS costs in Home Assistant, it would be lovely to have an Widget on iOS and macOS with AWS monthly costs and forecast.

For easy deploy and configuration, the Mobile app will expect a string from the user with a URL that it can fetch containing a JSON in a specific format, once this JSON is there and the data is validated, the app will be able to fetch it to refresh the data and draw a widget on iOS Home Screen.

This json would be generic enough that future applications can use it to draw other widgets on there native environments.

TODO:

• Define json structure
• Create a POC
• Create a Cloud Formation Stack containing the Lambda and the required IAM permissions that any user can deploy on there account and copy the URL to the app that will draw the widget.

[diego7marques]

AWS perspective:

MVP 1 requirements:

• Define the required IAM permissions
• Create the lambda function code and return the following response:

{
"cost": {
  "month_to_date_cost": 12,
  "month_current_day": 9,
  "forecasted_cost": 20,
  "currency": "USD"
  }
}

• Create the lambda function with endpoint enabled

MVP 2 requirements:

• Create the resources on user account using CloudFormation.

Topics to investigate/clarify:

• How to control the lambda/CF releases workflow as it is deployed on customer accounts
• How to ensure lambda is requested securely.
• How to cache (or store) data for historical charts