�，首先在外部服务启动一个 <code>ServiceEntry</code>：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl apply -f - &lt;&lt;EOF
apiVersion: networking.istio.io/v1beta1
kind: ServiceEntry
metadata:
  name: external-address
spec:
  addresses:
  - 198.51.100.1
  hosts:
  - address.internal
  ports:
  - name: http
    number: 80
    protocol: HTTP
EOF
</code></pre><p>调用客户端应用以发起 DNS 请求：</p><div><a data-skipendnotes=true style=display:none href