Is it possible to connect to different external hosts with same ports via TCP?

Networking
1

Hi,
I’am using isito 1.6.16 and i have following service entry for two external database instances:

apiVersion: networking.istio.io/v1beta1
kind: ServiceEntry
metadata:
  name: external-db-se
spec:
  hosts:
  - db1.external.host.com
  - db2.external.host.com
  location: MESH_EXTERNAL
  ports:
  - number: 5433
    name: tcp-db
    protocol: TCP
  resolution: NONE

but no matter what call is made, it always connects to db1.external.host.com

curl db1.external.host.com
[2021-09-22T21:05:01.786Z] "- - -" 0 - "-" 2087 2714 171337 - "-" "-" "-" "-" "10.55.68.8:5433" outbound|5433||db1.external.host.com 10.128.79.17:37608 10.55.68.8:5433 10.128.79.17:37606 - 

curl db2.external.host.com
[2021-09-22T21:05:01.786Z] "- - -" 0 - "-" 2087 2714 171337 - "-" "-" "-" "-" "10.56.95.8:5433" outbound|5433||db1.external.host.com 10.128.79.17:37608 10.56.95.8:5433 10.128.79.17:37606 -

curl 10.55.68.8:5433
[2021-09-22T21:05:01.786Z] "- - -" 0 - "-" 2087 2714 171337 - "-" "-" "-" "-" "10.55.68.8:5433" outbound|5433||db1.external.host.com 10.128.79.17:37608 10.55.68.8:5433 10.128.79.17:37606 -

curl 10.56.95.8:5433
[2021-09-22T21:05:01.786Z] "- - -" 0 - "-" 2087 2714 171337 - "-" "-" "-" "-" "10.56.95.8:5433" outbound|5433||db1.external.host.com 10.128.79.17:37608 10.56.95.8:5433 10.128.79.17:37606 -

Are there any workarounds for this? Is it possible to at least connect one database per service?

2

(I am not an expert.)

Your solution might be to use resolution DNS.

You can also use wildcard host (e.g. “*.foo.bar”) but the resolution must be set to DNS.

Thinking that you might have to use endpoints: and specify specific domain names. Offcourse you need resolution: DNS for endpoints to work.