admin: render histograms in HTML output
Open
area/admin
area/stats
enhancement
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- C++
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Description
Currently histograms are rendered textually, either as buckets or percentiles. Either are very hard to read in /stats output.
I thought this was mostly going to be a js/css/html exercise but actually the data we have coming out for histograms is very sparse and hard to render nicely. The raw data inside circlhist is much better. So this needs to add better access to the raw buckets in circlhist.
Draft PR: https://github.com/envoyproxy/envoy/pull/26472
Related issue: https://github.com/envoyproxy/envoy/issues/11259
@postwait @ramaraochavali @ggreenway FYI.
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