add streaming metrics (#8512)

Signed-off-by: Kuat Yessenov <kuat@google.com>
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Kuat 2020-11-16 13:38:33 -08:00 committed by GitHub
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@ -38,6 +38,10 @@ For TCP traffic, Istio generates the following metrics:
* **Tcp Connections Closed** (`istio_tcp_connections_closed_total`): This is a `COUNTER` incremented for every closed connection.
* **gRPC Request Message Count** (`istio_request_messages_total`): This is a `COUNTER` incremented for every gRPC message sent from a client.
* **gRPC Response Message Count** (`istio_response_messages_total`): This is a `COUNTER` incremented for every gRPC message sent from a server.
## Labels
* **Reporter**: This identifies the reporter of the request. It is set to `destination`