samples/custom-bootstrap/custom-bootstrap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: istio-custom-bootstrap-config
  namespace: default
data:
  custom_bootstrap.json: |
    "tracing": {
      "http": {
        "name": "envoy.tracers.zipkin",
        "typed_config": {
          "@type": "type.googleapis.com/envoy.config.trace.v3.ZipkinConfig",
          "collector_cluster": "zipkin",
          "collector_endpoint": "/api/v1/spans/custom",
          "collector_endpoint_version": "HTTP_JSON",
          "trace_id_128bit": true,
          "shared_span_context": false
        }
      }
    }