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Updates #5210

Change-Id: Ib02cd5e43d0a8db60c1f09755a8ac7b140b670be
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-08-02 09:33:46 -07:00
committed by Brad Fitzpatrick
parent a029989aff
commit 116f55ff66
36 changed files with 230 additions and 211 deletions
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12
tsweb/tsweb.go
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@@ -582,17 +582,17 @@ func writePromExpVar(w io.Writer, prefix string, kv expvar.KeyValue) {
// VarzHandler is an HTTP handler to write expvar values into the
// prometheus export format:
//
// https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md
// https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md
//
// It makes the following assumptions:
//
// * *expvar.Int are counters (unless marked as a gauge_; see below)
// * a *tailscale/metrics.Set is descended into, joining keys with
// - *expvar.Int are counters (unless marked as a gauge_; see below)
// - a *tailscale/metrics.Set is descended into, joining keys with
// underscores. So use underscores as your metric names.
// * an expvar named starting with "gauge_" or "counter_" is of that
// - an expvar named starting with "gauge_" or "counter_" is of that
// Prometheus type, and has that prefix stripped.
// * anything else is untyped and thus not exported.
// * expvar.Func can return an int or int64 (for now) and anything else
// - anything else is untyped and thus not exported.
// - expvar.Func can return an int or int64 (for now) and anything else
// is not exported.
//
// This will evolve over time, or perhaps be replaced.