# [질문 C 시연용] LOGICAL_DNS 비교 샘플.
# ServiceEntry의 resolution 필드가 Envoy cluster type을 결정한다:
#   resolution: DNS              -> Envoy STRICT_DNS   (A record 모든 IP를 endpoint로 펼침)
#   resolution: DNS_ROUND_ROBIN  -> Envoy LOGICAL_DNS  (필요 시 1개 IP만, 연결 재사용)
# 기존 httpbin-ext(=DNS=STRICT_DNS)와 대조하기 위해 example.com을 ROUND_ROBIN으로 등록.
apiVersion: networking.istio.io/v1beta1
kind: ServiceEntry
metadata:
  name: example-logicaldns
  namespace: mesh-test
spec:
  hosts:
    - example.com
  ports:
    - number: 443
      name: tls
      protocol: TLS
  resolution: DNS_ROUND_ROBIN   # -> LOGICAL_DNS
  location: MESH_EXTERNAL