RE</code> 补丁操作的 <code>EnvoyFilter</code> 为例：</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: test-relative
  namespace: bookinfo
spec:
  workloadSelector:
    labels:
      app: reviews2
  configPatches:
    # 第一个补丁将 Lua 过滤器添加到 listener/http 连接管理器
  - applyTo: HTTP_FILTER
    match:
      context: SIDECAR_INBOUND
      listener:
        portNumber: 8080
     