Azure front door health probe stops emitting logs

Question

I'm experiencing issues with Azure Front Door health probes. We are using Service Tag AzureFrontDoor.Backend to allow AFD to redirect to Kubernetes pods.

When I configure the probe protocol to HTTP (port 80), I receive a 307 redirect, why?

When I switch the protocol to HTTPS (port 443), I stop receiving any health probe logs, though I have enabled the log.

These are my settings

Answer 1

Hi @Lifei Wang , addressing your questions:

• When I configure the probe protocol to HTTP (port 80), I receive a 307 redirect, why?
  • Because your AFD (Azure Front Door) default-route is set to "Redirect all traffic to use HTTPS". Your health probe is using HTTP, so it gets a redirect (HTTP code 307).
• When I switch the protocol to HTTPS (port 443), I stop receiving any health probe logs, though I have enabled the log.
  • Referring to this document, Azure Front Door logs every failed health probe request. If you don't see any entry in health probe logs, it means there is no failed request.

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