I want to query the application settings on a function app from resource graph

Question

I want to query the application settings on a function app from resource graph

oblivion 1

If possible I would like to query that info, all the function apps have a application settings that exists somewhere in a json file that i cant query. I wanted to do it so i can query many azure function apps application settings at one time.

Lohith GN 516 Reputation points

2022-02-20T12:25:59.743+00:00

Can you elaborate on what you mean by "Query Many Azure Function APps application settings at one time"?

A Function App is like a container. A container provides you with Application Settings.
A Function App will contain N number of functions i.e. the container contains 1 or more functions. Each function by the virtue of being contained in a Function App - gets the same application setting.

You cannot query FunctionApp1 application settings from FunctionApp2>Function1. That is fundamentally not correct and fundamentally not supported also.

The JSON file you mention is called local.settings.json. As the name implies it is used only during your local development. When you are doing your local development - you do not have Azure on your desktop/laptop - but you need somebody to provide your functions the application settings of your function app. The Function runtime injects your local.settings.json file values to your function app configuration during local development. In Azure - your function app has a Application Settings page and you set your key value pairs there. When you function app starts azure will inject the app settings as Environment variables to your function app.

Having said that - there is another best practice we do for production level deployment. We store the secrets in Azure Key Vault. In your function app - we can map your application setting key's values to key vault secret directly.

Do let me know what are you trying to do - whats your requirement ?

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Lohith GN 516 Reputation points

2022-02-20T12:25:59.743+00:00

Can you elaborate on what you mean by "Query Many Azure Function APps application settings at one time"?

A Function App is like a container. A container provides you with Application Settings.
A Function App will contain N number of functions i.e. the container contains 1 or more functions. Each function by the virtue of being contained in a Function App - gets the same application setting.

You cannot query FunctionApp1 application settings from FunctionApp2>Function1. That is fundamentally not correct and fundamentally not supported also.

The JSON file you mention is called local.settings.json. As the name implies it is used only during your local development. When you are doing your local development - you do not have Azure on your desktop/laptop - but you need somebody to provide your functions the application settings of your function app. The Function runtime injects your local.settings.json file values to your function app configuration during local development. In Azure - your function app has a Application Settings page and you set your key value pairs there. When you function app starts azure will inject the app settings as Environment variables to your function app.

Having said that - there is another best practice we do for production level deployment. We store the secrets in Azure Key Vault. In your function app - we can map your application setting key's values to key vault secret directly.

Do let me know what are you trying to do - whats your requirement ?

Answer 1

@oblivion You cannot use Resource Graph to get the appsettings details of your function app.
The workaround will be using the Management REST API, Powershell or CLI to get the app setting details of the function app.

In case if you are using Azure Management API You need to write your custom logic to first query all the function apps on your subscription using Web Apps List API and filter with the function app. Now use List Application Settings API to get the app setting for a particular function app.

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I want to query the application settings on a function app from resource graph

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