Hot to setup Azure Functions with custom Application Insight(Instrumentation key)?

Question

For an Azure Function(AF) one can select Application Insights (AI) in Azure Portal. All information put into ILogger in .Net application will be sent to this AI. But in my case AF and AI are running under different accounts. Is there any way to specify a sink for Ilogger using just the Instrumentation key?

I could directly use TelemetryClient from AI libraries, but I am not sure if all information will be sent before AF shuts down, and calling Flush at the end of each function seems wrong.

Edit: Different accounts means, different Active directories.

Answer 1

You can directly add the application insights via Application Settings.

1. Nav to azure portal -> your function app -> Configuration -> Application Settings.

2. Then add these 2 settings:

   Key name: APPINSIGHTS_INSTRUMENTATIONKEY, and the value is the instrumentation key like xx22-xxdsds333.

   key name: APPLICATIONINSIGHTS_CONNECTION_STRING, and the value is InstrumentationKey=the instrumentation key.

   Then click the Save button.

   The screenshot is as below:

   

3. At last, you can use ILogger to write messages to application insights.