TLS Handshake Issue with Ambassador API Gateway for DigitalOcean Functions

I have set up a Kubernetes cluster and am using Ambassador as an API gateway to route traffic to DigitalOcean Functions. I followed the instructions provided in the DigitalOcean Kubernetes Starter Kit for Developers, specifically from this section: Setting up Ambassador Edge Stack.

However, I am encountering a TLS handshake issue when trying to route traffic through Ambassador to the DigitalOcean Function. The error I’m receiving is:

upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: TLS error: 268436496:SSL routines:OPENSSL_internal:SSLV3_ALERT_HANDSHAKE_FAILURE 268435610:SSL routines:OPENSSL_internal:HANDSHAKE_FAILURE_ON_CLIENT_HELLO

I’ve ensured that my configurations align with the instructions in the repository, but I’m still facing this issue. I suspect there might be a TLS configuration mismatch or some other underlying problem causing the handshake failure.

Here is my Mapping for Ambassador:

apiVersion: getambassador.io/v3alpha1
kind: Mapping
metadata:
  name: create-robot-mapping
  namespace: ambassador
spec:
  prefix: /create_robot
  service: https://faas-fra1-afec6ce7.doserverless.co/api/v1/web/fn-0c047659-5abf-4444-9c03-8ab68910414e/quayio/create_robot
  host_rewrite: faas-fra1-afec6ce7.doserverless.co
  host: ambassador.mydomain

Any assistance or guidance on how to resolve this issue would be highly appreciated. I’m eager to get this setup working smoothly and integrate DigitalOcean Functions seamlessly with my Kubernetes cluster via Ambassador.

Thank you in advance for your support.