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relabel debug: support multiple lines metrics input

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This commit is contained in:
Jiekun
2026-03-08 23:17:28 +08:00
parent 6db36e244c
commit f395e5db49
3 changed files with 450 additions and 398 deletions
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35
lib/promrelabel/debug.go
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@@ -35,12 +35,6 @@ func writeRelabelDebug(w io.Writer, isTargetRelabel bool, targetID, metric, rela
return
}
labels, err := promutil.NewLabelsFromString(metric)
if err != nil {
err = fmt.Errorf("cannot parse metric: %w", err)
WriteRelabelDebugSteps(w, targetURL, targetID, format, nil, metric, relabelConfigs, err)
return
}
pcs, err := ParseRelabelConfigsData([]byte(relabelConfigs))
if err != nil {
err = fmt.Errorf("cannot parse relabel configs: %w", err)
@@ -48,8 +42,33 @@ func writeRelabelDebug(w io.Writer, isTargetRelabel bool, targetID, metric, rela
return
}
dss, targetURL := newDebugRelabelSteps(pcs, labels, isTargetRelabel)
WriteRelabelDebugSteps(w, targetURL, targetID, format, dss, metric, relabelConfigs, nil)
// metric input may contain multiple lines, and it's good to add support and print the debug steps for each of them.
// however, the target URL won't change
metrics := strings.Split(metric, "\n")
dsss := make([][]DebugStep, 0, len(metrics))
var lastErr error
for _, m := range metrics {
// try to trim all the special characters and space first
m = strings.TrimSpace(m)
labels, err := promutil.NewLabelsFromString(m)
if err != nil {
lastErr = err
continue
}
dss, tURL := newDebugRelabelSteps(pcs, labels, isTargetRelabel)
targetURL = tURL
dsss = append(dsss, dss)
}
// break here if all failed
if len(dsss) == 0 && lastErr != nil {
err = fmt.Errorf("cannot parse metric: %w", err)
WriteRelabelDebugSteps(w, targetURL, targetID, format, nil, metric, relabelConfigs, lastErr)
return
}
WriteRelabelDebugSteps(w, targetURL, targetID, format, dsss, metric, relabelConfigs, nil)
}
func newDebugRelabelSteps(pcs *ParsedConfigs, labels *promutil.Labels, isTargetRelabel bool) ([]DebugStep, string) {

77
lib/promrelabel/debug.qtpl
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@@ -6,15 +6,15 @@
{% stripspace %}
{% func RelabelDebugSteps(targetURL, targetID, format string, dss []DebugStep, metric, relabelConfigs string, err error) %}
{% func RelabelDebugSteps(targetURL, targetID, format string, dsss [][]DebugStep, metric string, relabelConfigs string, err error) %}
{% if format == "json" %}
{%= RelabelDebugStepsJSON(targetURL, targetID, dss, metric, relabelConfigs, err) %}
{%= RelabelDebugStepsJSON(targetURL, targetID, dsss, metric, relabelConfigs, err) %}
{% else %}
{%= RelabelDebugStepsHTML(targetURL, targetID, dss, metric, relabelConfigs, err) %}
{%= RelabelDebugStepsHTML(targetURL, targetID, dsss, metric, relabelConfigs, err) %}
{% endif %}
{% endfunc %}
{% func RelabelDebugStepsHTML(targetURL, targetID string, dss []DebugStep, metric, relabelConfigs string, err error) %}
{% func RelabelDebugStepsHTML(targetURL, targetID string, dsss [][]DebugStep, metric string, relabelConfigs string, err error) %}
<!DOCTYPE html>
<html lang="en">
<head>
@@ -60,11 +60,13 @@ function submitRelabelDebugForm(e) {
</form>
</div>
{% for _, dss := range dsss %}
<div class="row">
<main class="col-12">
{%= relabelDebugSteps(dss, targetURL, targetID) %}
</main>
</div>
{% endfor %}
</div>
</body>
</html>
@@ -77,7 +79,7 @@ function submitRelabelDebugForm(e) {
</div>
<div>
Labels:<br/>
Labels (One label set per line. Multiple lines will be treated as multiple label sets):<br/>
<textarea name="metric" style="width: 100%; height: 5em; font-family: monospace" class="m-1">{%s metric %}</textarea>
</div>
{% endfunc %}
@@ -151,45 +153,52 @@ function submitRelabelDebugForm(e) {
{% endif %}
{% endfunc %}
{% func RelabelDebugStepsJSON(targetURL, targetID string, dss []DebugStep, metric, relabelConfigs string, err error) %}
{% func RelabelDebugStepsJSON(targetURL, targetID string, dsss [][]DebugStep, metric string, relabelConfigs string, err error) %}
{
{% if err != nil %}
"status": "error",
"error": {%q= fmt.Sprintf("Error: %s", err) %}
{% else %}
{% code var hasError bool %}
"status": "success",
"steps": [
{% for i, ds := range dss %}
{% code
inLabels, inErr := promutil.NewLabelsFromString(ds.In)
outLabels, outErr := promutil.NewLabelsFromString(ds.Out)
changedLabels := getChangedLabelNames(inLabels, outLabels)
%}
"metrics": [
{% for idx, dss := range dsss %}
{% code var hasError bool %}
{
"inLabels": {%q= labelsWithHighlight(inLabels, changedLabels, "#D15757") %},
"outLabels": {%q= labelsWithHighlight(outLabels, changedLabels, "#4495e0") %},
"rule": {%q= ds.Rule %},
"errors": {
{% if inErr != nil %}
"inLabels": {%q= `<span style="color: #D15757">`+inErr.Error()+`</span>` %}{% if outErr != nil %},{% endif %}
{%code hasError = true %}
{% else %}
{% endif %}
{% if outErr != nil %}
"outLabels": {%q= `<span style="color: #D15757">`+outErr.Error()+`</span>` %}
{%code hasError = true %}
{% endif %}
}
"steps": [
{% for i, ds := range dss %}
{% code
inLabels, inErr := promutil.NewLabelsFromString(ds.In)
outLabels, outErr := promutil.NewLabelsFromString(ds.Out)
changedLabels := getChangedLabelNames(inLabels, outLabels)
%}
{
"inLabels": {%q= labelsWithHighlight(inLabels, changedLabels, "#D15757") %},
"outLabels": {%q= labelsWithHighlight(outLabels, changedLabels, "#4495e0") %},
"rule": {%q= ds.Rule %},
"errors": {
{% if inErr != nil %}
"inLabels": {%q= `<span style="color: #D15757">`+inErr.Error()+`</span>` %}{% if outErr != nil %},{% endif %}
{%code hasError = true %}
{% else %}
{% endif %}
{% if outErr != nil %}
"outLabels": {%q= `<span style="color: #D15757">`+outErr.Error()+`</span>` %}
{%code hasError = true %}
{% endif %}
}
}
{% if i != len(dss)-1 %},{% endif %}
{% endfor %}
]
{% if len(dss) > 0 && !hasError %}
,
"originalLabels": {%q= mustFormatLabels(dss[0].In) %},
"resultingLabels": {%q= mustFormatLabels(dss[len(dss)-1].Out) %}
{% endif %}
}
{% if i != len(dss)-1 %},{% endif %}
{% if idx != len(dsss)-1 %},{% endif %}
{% endfor %}
]
{% if len(dss) > 0 && !hasError %}
,
"originalLabels": {%q= mustFormatLabels(dss[0].In) %},
"resultingLabels": {%q= mustFormatLabels(dss[len(dss)-1].Out) %}
{% endif %}
{% endif %}
}
{% endfunc %}

736
lib/promrelabel/debug.qtpl.go
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