Add Envoy sidecar request/response filter time metrics (#72)
diff --git a/service-mesh-probe/service-mesh.proto b/service-mesh-probe/service-mesh.proto
index 0e0325e..47dbe36 100644
--- a/service-mesh-probe/service-mesh.proto
+++ b/service-mesh-probe/service-mesh.proto
@@ -59,6 +59,17 @@
// The tcp detail of the mesh metrics if it's a TCP metrics, otherwise should be empty.
TCPInfo tcp = 15;
+
+ // Internal request(response) latency is the time cost inside the Envoy sidecar proxy.
+ // For more details, check https://www.envoyproxy.io/docs/envoy/v1.22.0/api-v3/data/accesslog/v3/accesslog.proto.html#data-accesslog-v3-accesslogcommon.
+ // internalRequestLatencyNanos is the interval between the first downstream byte received and the first upstream byte sent
+ int64 internalRequestLatencyNanos = 16;
+ // internalResponseLatencyNanos = time_to_first_downstream_tx_byte - time_to_first_upstream_rx_byte;
+ // | ... request workflow ... | upstream | ----- response -----> | proxy | ------- response -------> | client |
+ // | time_to_first_upstream_rx_byte |
+ // | time_to_last_downstream_tx_byte |
+ // | internalResponseLatencyNanos |
+ int64 internalResponseLatencyNanos = 17;
}
enum Protocol {
