Define Environment Variables

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App Cloud lets you externalize configuration - storing data such as encryption keys or external resource addresses in environment variables.

At runtime, environment variables are exposed to the application through its environment. You can use these for example to run your app in production mode setting the APP_MODE environment variable.

$ cf set-env my-dotnetcore-app APP_MODE production
Setting env variable 'APP_MODE' to 'production' for app my-dotnetcore-app in org MyOrg / space MySpace as user@smydomain.com...
OK
TIP: Use 'cf restage' to ensure your env variable changes take effect

Then restage your app as suggested using

$ cf restage my-dotnetcore-app
Restaging app my-dotnetcore-app in org MyOrg / space MySpace as user@mydomain.com...
Creating container
Successfully created container
Downloading app package...

...

All environment variables are accessed using the Environment.GetEnvironmentVariable("APP_MODE") method from within your .NET Core app.

I’ve set my environment variable
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