#kubernetes - May 2023

Hi everyone, I want to create a production level high availability kubernetes cluster on premise, so what are the things that I should take care of, can you guys guide me or give me some resources so that I can read these things?

If anyone is willing to field an Istio/Envoy question in here:

I have an issue where all services are behind the same Gateway (Istio 1.13.x) attached to a GCP LB and the calls are svcA -> svcB -> svcC -> svcB -> svcD and is resulting in downstream_remote_disconnect in istio-proxy logs for svcB
When I clone svcB in another namespace behind a different VirtualService and do svcA -> svcB -> svcC -> svcB(clone) -> svcD I get the expected 200. Is there anything obvious as to why this is the case?
I am happy to provide more details as needed.

[2023-05-16T22:15:56.839Z] "GET /uri?query=test HTTP/1.1" 0 DC downstream_remote_disconnect - "-" 0 0 119998 - "34.29.X.X, 34.111.X.X,35.191.X.X" "axios/0.27.2" "53b3a438-a3dc-4df7-86a9-7229048d993e" "<http://svcB.stage.XXX.com|svcB.stage.XXX.com>" "10.88.X.X:8080" inbound|8080|| 127.0.0.6:46205 10.88.X.X:8080 35.191.X.X:0 outbound_.8080_._.svcB.svcB.svc.cluster.local default