Creating a custom DNS Alias with Istio (E.g. xxx.default.svc.cluster.local points to xxx.default.global)

Networking
1

Hello,

I have a remote cluster which works when using xxx.default.global (with ServiceEntry). However, I would like to use a custom cluster.local DNS.

Example: mongodb-primary-0.mongodb-headless.default.svc.cluster.local points to mongodb-primary-0.default.global

Is this possible (Istio 1.5.1)? I tried the following without success:

apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry
metadata:
  name: mongodb-arbiter-0-headless
spec:
  hosts:
  - "somecustom.subdomain.svc.cluster.local"
  location: MESH_INTERNAL
  ports:
  - name: tcp
    number: 27017
    protocol: TCP
  - name: http1
    number: 9216
    protocol: http
  resolution: DNS
  endpoints:
  - address: myservice.default.global
    ports:
      tcp: 27017
      http1: 9216

I know it is possible to rewrite DNS directly with CoreDNS but it is the least favourable solution for me.

Thanks