request help: any methods to remove leading and trailing zeros for histrogram buckets

[Yiyiyimu]

Hi @knyar thanks for this repo. It's so great!

One problem is, when I have a lot of buckets, say

local DEFAULT_BUCKETS = { 1, 2, 5, 7, 10, 15, 20, 25, 30, 40, 50, 60, 70,
    80, 90, 100, 200, 300, 400, 500, 1000,
    2000, 5000, 10000, 30000, 60000
}

I'll get the grafana panel like this and it's quite annoying.

I get the reason for add those zeros, but since grafana does not support formatting legends(buckets), is there any method to remove those zeros?

[dolik-rce]

Hi @Yiyiyimu,

If you're using Grafana 7+, you might be able to reformat the labels using transformations. Alternatively (should work in older versions of grafana as well), you can wrap your query in label_replace, which can contain regex to select only part of label without leading and trailing zeros.

But I think that is only a temporary workaround. The library probably should format the labels properly when exposing the metrics, just as it does for "+Inf". What do you think @knyar?

[Yiyiyimu]

Thank for the suggestions @dolik-rce! I try to implement that in #119, welcome have some review~

It seems transformation in Grafana does not work for this situation. The organize fields option could only work with a single frame, but not a heatmap. And since it is not actually "label" but called "legends" in grafana, so I could not add label_replace function` for this situation. But still thanks for the suggestions!