tio:istio_request_duration_milliseconds_bucket:p95:rate1m&#34;
    expr: |
      histogram_quantile(0.95,
        sum(irate(istio_request_duration_milliseconds_bucket{reporter=&#34;source&#34;}[1m]))
        by (
          destination_canonical_service,
          destination_workload_namespace,
          source_canonical_service,
          source_workload_namespace,
          le
        )
      )
</code></pre><p>The production instance of Prometheus would then be updated to federate from the Istio instance 