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[docs] update promql query for istio request duration 

A minor issue I stumbled across while learning how to drive Flagger, is that the docs still use `istio_request_duration_seconds_bucket` to illustrate the query behind the `request-duration` metric. I understand that this changed with Istio 1.5 (https://github.com/fluxcd/flagger/issues/478), but it seems that in the current version of flagger, the correct metric must already be used, since I'm getting duration metrics out of Istio 1.10 :)

This change simply makes the docs clearer for those of us trying to understand exactly what `request-duration` entails!

Signed-off-by: David Young <davidy@funkypenguin.co.nz>
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David Young 2021-09-20 10:51:18 +12:00
parent e8b17406b7
commit a2b58d59ab
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docs/gitbook/faq.md
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@ -446,7 +446,7 @@ Istio query:
histogram_quantile(0.99,
sum(
irate(
istio_request_duration_seconds_bucket{
istio_request_duration_milliseconds_bucket{
reporter="destination",
destination_workload=~"$workload",
destination_workload_namespace=~"$namespace"