ILB ASE deployment: "The Function Runtime is Unable to Start"

[CreditDataResearch]

Cross-posted from https://stackoverflow.com/questions/54351036/what-would-prevent-the-azure-function-runtime-from-starting-in-an-ilb-ase-deploy/54358222#54358222

• ILB ASE with function app.
• JumpBox configured with the custom domain in its HOSTS file and set up to trust my self-signed certificate for both the function.custom and function.scm.custom domains
• Function storage accessible
• CORS set to * for testing
• Kudu console for the function app accessible with deployment credentials
• But accessing function url returns Function host is not running

And there is a popup error:

And another:

Multiple 500 and 503 errors in the F12 Dev Console

Please provide the following:

• Timestamp: 2019-01-25T09:25:12.567Z
• Function App version (1.0 or 2.0): 2.0
• Function App name: ratings
• Function name(s) (as appropriate): GetRating
• Invocation ID: Session ID b7d7410324a748d1b85277b10d5b79d2
• Region: UK South (Isolated ILB ASE)

Expected behaviour is to be able to test the function in the portal from the JumpBox.

Fails due to errors shown above in portal.

[tohling]

@CreditDataResearch, thank you for opening the issue. I will investigate and update the thread when I have more information.

[tohling]

@CreditDataResearch , we don't see any errors in the platform or the worker that your Function App is running on. We do see errors in the Functions Logs that points to the Functions Runtime process being unable to load your Function code. Are you able to run your Function(s) locally? Do you see any other logs in Application Insights?

[kashimiz]

@CreditDataResearch, are you still experiencing this issue?