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Cache prometheusize rename between scrapes #1080

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Merged
BupycHuk merged 6 commits into from
Jun 23, 2025
Merged

Cache prometheusize rename between scrapes #1080

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dcc893d
cache prometheusize
vigno99 May 9, 2025
f40a12c
Add prefix
vigno99 May 9, 2025
6ec34f2
thread safe
vigno99 May 12, 2025
fb550a3
Merge branch 'main' into cache_name
vigno88 May 12, 2025
7cb2e54
Merge branch 'main' into cache_name
idoqo Jun 9, 2025
24099d3
Merge branch 'main' into cache_name
idoqo Jun 10, 2025
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9 changes: 9 additions & 0 deletions exporter/metrics.go
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Original file line number Diff line number Diff line change
Expand Up @@ -164,10 +164,17 @@ var (
dollarRe = regexp.MustCompile(`\_$`)
)

var prometheusizeCache = make(map[string]string)

// prometheusize renames metrics by replacing some prefixes with shorter names
// replace special chars to follow Prometheus metric naming rules and adds the
// exporter name prefix.
func prometheusize(s string) string {
if renamed, exists := prometheusizeCache[s]; exists {
return renamed
}
back := strings.Clone(s)

for _, pair := range prefixes {
if strings.HasPrefix(s, pair[0]+".") {
s = pair[1] + strings.TrimPrefix(s, pair[0])
Expand All @@ -180,6 +187,8 @@ func prometheusize(s string) string {
s = repeatedUnderscoresRe.ReplaceAllString(s, "_")
s = strings.TrimPrefix(s, "_")

prometheusizeCache[back] = strings.Clone(s)

return exporterPrefix + s
}

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