envoyFilter.yaml

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: trace-filter
  labels:
    workload-type: pod
spec:
  configPatches:
    - applyTo: HTTP_FILTER
      match:
        context: SIDECAR_OUTBOUND
        listener:
          filterChain:
            filter:
              name: envoy.filters.network.http_connection_manager
              subFilter:
                name: envoy.filters.http.router
      patch:
        operation: INSERT_BEFORE
        value:
          name: envoy.filters.http.wasm
          typedConfig:
            '@type': type.googleapis.com/udpa.type.v1.TypedStruct
            typeUrl: type.googleapis.com/envoy.extensions.filters.http.wasm.v3.Wasm
            value:
              config:
                name: trace-outbound-filter
                rootId: trace-outbound-filter
                configuration:
                  "@type": "type.googleapis.com/google.protobuf.StringValue"
                  value: |
                    {{PLUGIN_CONFIG}}
                vmConfig:
                  code:
                    local:
                      filename: /var/local/lib/wasm-filters/http-trace-filter.wasm
                  runtime: envoy.wasm.runtime.v8
                  vmId: trace-outbound-filter
    - applyTo: CLUSTER
      match:
        context: SIDECAR_OUTBOUND
      patch:
        operation: ADD
        value: # cluster specification
          name: trace_analyzer
          type: LOGICAL_DNS
          connect_timeout: 0.5s
          lb_policy: ROUND_ROBIN
          load_assignment:
            cluster_name: trace_analyzer
            endpoints:
              - lb_endpoints:
                  - endpoint:
                      address:
                        socket_address:
                          protocol: TCP
                          address: {{WASM_FILTER_TRACE_BACKEND_ADDRESS}}
                          port_value: {{WASM_FILTER_TRACE_BACKEND_PORT}}
    - applyTo: CLUSTER
      match:
        context: SIDECAR_OUTBOUND
      patch:
        operation: ADD
        value: # cluster specification
          name: trace-sampling-manager
          type: LOGICAL_DNS
          connect_timeout: 0.5s
          lb_policy: ROUND_ROBIN
          load_assignment:
            cluster_name: trace-sampling-manager
            endpoints:
              - lb_endpoints:
                  - endpoint:
                      address:
                        socket_address:
                          protocol: TCP
                          address: {{WASM_FILTER_TRACE_BACKEND_ADDRESS}}
                          port_value: {{WASM_FILTER_TRACE_SAMPLING_PORT}}