Doc: Link hubble metrics to L7 visibility.

Signed-off-by: Mandar U Jog <mjog@google.com>
cilium · Nov 9, 2020 · 53f35fb · 53f35fb
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commit 53f35fb
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diff --git a/Documentation/operations/metrics.rst b/Documentation/operations/metrics.rst
@@ -115,6 +115,11 @@ section for the full list of available metrics and their options.
 The port of the Hubble metrics can be configured with the
 ``hubble.metrics.port`` Helm value.
 
+.. Note::
+
+    L7 metrics such as HTTP, are only emitted for pods that enable
+    :ref:`Layer 7 Protocol Visibility <proxy_visibility>`.
+
 When deployed with a non-empty ``hubble.metrics.enabled`` Helm value, the
 Cilium chart will create a Kubernetes headless service named ``hubble-metrics``
 with the ``prometheus.io/scrape:'true'`` annotation set: