title: How to integrate Istio with Prometheus
body: <p>I need to do a POC on collecting k8s application metrics using Istio + Prometheus. 
  My prometheus is running on a VM. I do not want to run Prometheus as a container in kubernetes.<br>
  Can anyone help me getting the right documentation for this? 
  Or suggest how can I do this without running prometheus as a pod in k8s?</p>