menting the Istio configuration for attribute generation
and Prometheus handler. You should be careful about cardinality explosion in
time series if you have many services with non-stable IP addresses.</p><h3 id=passthroughcluster-metrics>PassthroughCluster metrics</h3><p>This section explains the metrics and the labels emitted based on the listener
type invoked in Envoy.</p><ul><li><p>HTTP proxy listener: This happens when the port of the external service is
same as one of the service ports defined in the 