<p>I want to configure istio in such a way that it does not uses Prometheus or Grafana which come by default with it. I want to use my existing Prometheus and Grafana which is already deplyoed in cluster. Any help will be appreciated.</p>

Bunny
<p>You need to configure your existing prometheus with a scrape configuration.For prometheus config you can use this <a href="https://github.com/istio/istio/blob/master/manifests/istio-telemetry/prometheus/templates/configmap.yaml" rel="nofollow noreferrer">ConfigMap</a>. For grafana you need to configure your prometheus as datasource and you can use this <a href="https://github.com/istio/istio/blob/master/manifests/istio-telemetry/grafana/templates/configmap.yaml" rel="nofollow noreferrer">configMap</a> for that. You can generate the ConfigMaps using helm template and use.</p>

<p>Check this <a href="https://istiobyexample.dev/prometheus/" rel="nofollow noreferrer">guide</a></p>
