=&#34;2xx&#34;,cluster_name=&#34;xds-grpc&#34;} 7163

envoy_cluster_upstream_rq_completed{cluster_name=&#34;xds-grpc&#34;} 7164

envoy_cluster_ssl_connection_error{cluster_name=&#34;xds-grpc&#34;} 0

envoy_cluster_lb_subsets_removed{cluster_name=&#34;xds-grpc&#34;} 0

envoy_cluster_internal_upstream_rq{response_code=&#34;503&#34;,cluster_name=&#34;xds-grpc&#34;} 1
</code></pre><h3 id=service-level-metrics>Service-level metrics</h3><p>In addition to the proxy-level metrics, Istio provides a set of service-or