_canonical_service=&#34;productpage&#34;,
  source_canonical_revision=&#34;v1&#34;,
  source_principal=&#34;cluster.local/ns/default/sa/default&#34;,
  source_version=&#34;v1&#34;,
  source_workload=&#34;productpage-v1&#34;,
  source_workload_namespace=&#34;default&#34;
} 214
</code></pre><h3 id=control-plane-metrics>Control plane metrics</h3><p>The Istio control plane also provides a collection of self-monitoring metrics. These metrics allow monitoring of the behavior
of Istio itself (as distinct from that