How to update a value of Key in appsettings.json file in azure devops pipeline

Question

How to update a value of Key in appsettings.json file in azure devops pipeline

Sathish Kumar Karikalan 81

I have below default configuration Appsettings.json file, I need to update the value of InstrumentationKey during CD process, is there any powershell script to replace the InstrumentationKey default value with the new value.

"ApplicationInsights": {

    "InstrumentationKey": "xxxxxxxx-yyyy-zzzz-aaaa-bbbbbbbb",

    "RoleName": "API_Localhost"
}

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Answer 1

Ben Gimblett 4,560 Microsoft Employee

Hi
Use App Service App Settings - the underscore replaces ":" for the hierarchy. The following snip (below) shows both the legacy instrumentation key and the newer connection string config .

App Settings override the config file values and are also exposed as Env Vars at runtime.

Azure Dev Ops (ADO) supports tasks for App service - and more generically there's a PS1 and CLI commands for setting app settings which can be used in a pipeline. CLI example here.

App settings also help a lot if you want to use App Service slots.
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Sathish Kumar Karikalan 81 Reputation points

2023-07-11T10:18:15.1133333+00:00

I have already added Key value pairs to appsettings of web app through IAC pipeline, but application team have config files such as index.html and appsettings.json with the below highlighted default values and they have their own release pipeline, whenever they do release these default values getting deployed to app, They can use Variable group but since that is manual process whenever keys changes, we need to update Variable group as well, so we need this kind of automation. I can able to retrieve the appsettings from webapp through powershell, I need to override the below highlighted default value in application code with the value I got from appsettings. is there any way available in Powershell for finding "ApplicationInsights:InstrumentationKey" and updating its default value.
Ben Gimblett 4,560 Reputation points Microsoft Employee

2023-07-11T10:38:18.32+00:00

you would need to parametrize the json and have a task to "find-and-replace" the value --- aka "variable substitution". There's an Az Dev Ops example here. But obviously this is something that can easily be done in other products / through command line.

But honestly, it would be better to rely on the app settings BECAUSE these will take PRECEDENCE

So where both exist - the app setting will be used and the file value ignored. And as per previous the app setting allows for far greater flexibility

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How to update a value of Key in appsettings.json file in azure devops pipeline

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