EnvoyFilter 使用 Replace 操作不正確

當 EnvoyFilter 使用 REPLACE 操作，且 ApplyTo 設定為 HTTP_FILTER 或 NETWORK_FILTER 時，會發生此訊息。這將導致 REPLACE 操作被忽略，因為 HTTP_FILTER 和 NETWORK_FILTER 對於 REPLACE 無效。

範例

考慮一個具有 REPLACE 修補操作的 EnvoyFilter，此 EnvoyFilter 將被直接忽略。

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: test-replace-2
  namespace: bookinfo
spec:
  workloadSelector:
    labels:
      app: reviews2
  priority: 10
  configPatches:
    # The first patch adds the Lua filter to the listener/http connection manager
  - applyTo: HTTP_FILTER
    match:
      context: SIDECAR_INBOUND
      listener:
        portNumber: 8080
        filterChain:
          filter:
            name: "envoy.filters.network.http_connection_manager"
            subFilter:
              name: "envoy.filters.http.router"
    patch:
      operation: REPLACE
      value: # Lua filter specification
       name: envoy.lua
       typed_config:
          "@type": "type.googleapis.com/envoy.extensions.filters.http.lua.v3.Lua"
          inlineCode: |
            function envoy_on_request(request_handle)
              -- Make an HTTP call to an upstream host with the following headers, body, and timeout.
              local headers, body = request_handle:httpCall(
               "lua_cluster",
               {
                [":method"] = "POST",
                [":path"] = "/acl",
                [":authority"] = "internal.org.net"
               },
              "authorize call",
              5000)
            end