NetworkPolicy를 적용한 뒤 서비스 이름만 안 풀림: IP로는 호출 성공

ERROR ledger call failed: Get "http://ledger.ledger.svc.cluster.local:8080/v1/entries": dial tcp: lookup ledger.ledger.svc.cluster.local: i/o timeout

$ kubectl -n payments exec deploy/pay-api -- curl -s -o /dev/null -w '%{http_code}' http://10.96.12.40:8080/health
200
$ kubectl -n payments exec deploy/pay-api -- nslookup ledger.ledger.svc.cluster.local
;; connection timed out; no servers could be reached

spec:
  podSelector: {}
  policyTypes: [Egress]
  egress:
    - to:
        - namespaceSelector:
            matchLabels: { kubernetes.io/metadata.name: ledger }
      ports:
        - { protocol: TCP, port: 8080 }