How and where to define an environment variable on Azure

Question

I have an ASP.NET MVC web application deployed to Azure. I\'m reading my setting using the GetEnvironmentVariable(...) method.

The problem is that I can

Answer 1

I came across this question when facing the same problem myself. Well, just to give a clearer answer which I found at blog.elmah.io.

All you need to do is:

1. Include the new appsetting.{env}.json in the publishOptions in file project.json.
2. Go to Azure Portal and open the web application.
3. Select application settings.
4. Add an entry for ASPNETCORE_ENVIRONMENT and set it to whatever you want.

That's it.

Answer 2

I assume you are using Azure App Service (formerly known as Azure Websites).

To define your own environment variable, click to your site → All Settings → Application settings:

Add an app setting in the "App settings" section:

You can verify the value from the debug console.

Going to https://{your site name}.scm.azurewebsites.net/DebugConsole:

Answer 3

Actually this solves my problem (which I found yesterday - and it's on Scott Hanselman's blog also):

Best practices for private config data and connection strings in configuration in ASP.NET and Azure

TLDR;

Put settings in a separate file that doesn't go to the repository and are not being deployed to the server. Next define missing variables in app settings like Xiaomin Wu showed.

Answer 4

I know OP specified in the portal, but command line is more repeatable. To do it using Azure CLI:

az webapp config appsettings set -n $webappname -g $resourceGroupName --settings ConnectionStrings__Default=$connectionString

To set an environment variable ConnectionStrings__Default to the variable $connectionString

Answer 5

In the new version 2019 go to the resource -> Configuration.

Then click on "New application settings".

Then add "ASPNETCORE_ENVIRONMENT" as key and click on OK then Save.

Note that you must have the appsettings.(environment).json file for .Net Core.

Answer 6

(2019 version) Navigate to your AppService in the Azure cloud portal then Configuration.