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Turned "le" and "quantile" label names into constants.

This commit is contained in:
beorn7 2015-02-19 15:31:43 +01:00
parent 3e50eddd64
commit b1e7299877
6 changed files with 43 additions and 24 deletions
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6
extraction/metricfamilyprocessor.go
View File

@ -164,7 +164,7 @@ func extractSummary(out Ingester, o *ProcessOptions, f *dto.MetricFamily) error
metric[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
// BUG(matt): Update other names to "quantile".
metric[model.LabelName("quantile")] = model.LabelValue(fmt.Sprint(q.GetQuantile()))
metric[model.LabelName(model.QuantileLabel)] = model.LabelValue(fmt.Sprint(q.GetQuantile()))
metric[model.MetricNameLabel] = model.LabelValue(f.GetName())
}
@ -259,7 +259,7 @@ func extractHistogram(out Ingester, o *ProcessOptions, f *dto.MetricFamily) erro
for _, p := range m.Label {
metric[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
metric[model.LabelName("le")] = model.LabelValue(fmt.Sprint(q.GetUpperBound()))
metric[model.LabelName(model.BucketLabel)] = model.LabelValue(fmt.Sprint(q.GetUpperBound()))
metric[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket")
if math.IsInf(q.GetUpperBound(), +1) {
@ -308,7 +308,7 @@ func extractHistogram(out Ingester, o *ProcessOptions, f *dto.MetricFamily) erro
for _, p := range m.Label {
metric[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
metric[model.LabelName("le")] = model.LabelValue("+Inf")
metric[model.LabelName(model.BucketLabel)] = model.LabelValue("+Inf")
metric[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket")
}
}

8
model/labelname.go
View File

@ -33,6 +33,14 @@ const (
// JobLabel is the label name indicating the job from which a timeseries
// was scraped.
JobLabel LabelName = "job"
// BucketLabel is used for the label that defines the upper bound of a
// bucket of a histogram ("le" -> "less or equal").
BucketLabel = "le"
// QuantileLabel is used for the label that defines the quantile in a
// summary.
QuantileLabel = "quantile"
)
// A LabelName is a key for a LabelSet or Metric. It has a value associated

17
prometheus/histogram.go
View File

@ -21,6 +21,7 @@ import (
"github.com/golang/protobuf/proto"
"github.com/prometheus/client_golang/model"
dto "github.com/prometheus/client_model/go"
)
@ -33,7 +34,7 @@ import (
//
// Note that Histograms, in contrast to Summaries, can be aggregated with the
// Prometheus query language (see the documentation for detailed
// procedures). However, Histograms requires the user to pre-define suitable
// procedures). However, Histograms require the user to pre-define suitable
// buckets, and they are in general less accurate. The Observe method of a
// Histogram has a very low performance overhead in comparison with the Observe
// method of a Summary.
@ -47,12 +48,16 @@ type Histogram interface {
Observe(float64)
}
var (
// DefBuckets are the default Histogram buckets. The default buckets are
// tailored to broadly measure response time in seconds for a typical online
// serving system. Most likely, however, you will be required to define buckets
// customized to your use case.
var (
DefBuckets = []float64{.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10}
errBucketLabelNotAllowed = fmt.Errorf(
"%q is not allowed as label name in histograms", model.BucketLabel,
)
)
// LinearBuckets creates 'count' buckets, each 'width' wide, where the lowest
@ -165,13 +170,13 @@ func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogr
}
for _, n := range desc.variableLabels {
if n == "le" {
panic("'le' is not allowed as label name in histograms")
if n == model.BucketLabel {
panic(errBucketLabelNotAllowed)
}
}
for _, lp := range desc.constLabelPairs {
if lp.GetName() == "le" {
panic("'le' is not allowed as label name in histograms")
if lp.GetName() == model.BucketLabel {
panic(errBucketLabelNotAllowed)
}
}

15
prometheus/summary.go
View File

@ -25,6 +25,7 @@ import (
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/client_golang/_vendor/perks/quantile"
"github.com/prometheus/client_golang/model"
)
// A Summary captures individual observations from an event or sample stream and
@ -50,9 +51,13 @@ type Summary interface {
Observe(float64)
}
// DefObjectives are the default Summary quantile values.
var (
// DefObjectives are the default Summary quantile values.
DefObjectives = map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001}
errQuantileLabelNotAllowed = fmt.Errorf(
"%q is not allowed as label name in summaries", model.QuantileLabel,
)
)
// Default values for SummaryOpts.
@ -164,13 +169,13 @@ func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary {
}
for _, n := range desc.variableLabels {
if n == "quantile" {
panic("'quantile' is not allowed as label name in summaries")
if n == model.QuantileLabel {
panic(errQuantileLabelNotAllowed)
}
}
for _, lp := range desc.constLabelPairs {
if lp.GetName() == "quantile" {
panic("'quantile' is not allowed as label name in summaries")
if lp.GetName() == model.QuantileLabel {
panic(errQuantileLabelNotAllowed)
}
}

7
text/create.go
View File

@ -27,6 +27,7 @@ import (
"math"
"strings"
"github.com/prometheus/client_golang/model"
dto "github.com/prometheus/client_model/go"
)
@ -117,7 +118,7 @@ func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (int, error) {
for _, q := range metric.Summary.Quantile {
n, err = writeSample(
name, metric,
"quantile", fmt.Sprint(q.GetQuantile()),
model.QuantileLabel, fmt.Sprint(q.GetQuantile()),
q.GetValue(),
out,
)
@ -150,7 +151,7 @@ func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (int, error) {
for _, q := range metric.Histogram.Bucket {
n, err = writeSample(
name+"_bucket", metric,
"le", fmt.Sprint(q.GetUpperBound()),
model.BucketLabel, fmt.Sprint(q.GetUpperBound()),
float64(q.GetCumulativeCount()),
out,
)
@ -165,7 +166,7 @@ func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (int, error) {
if !infSeen {
n, err = writeSample(
name+"_bucket", metric,
"le", "+Inf",
model.BucketLabel, "+Inf",
float64(metric.Histogram.GetSampleCount()),
out,
)

8
text/parse.go
View File

@ -274,8 +274,8 @@ func (p *Parser) startLabelName() stateFn {
}
// Special summary/histogram treatment. Don't add 'quantile' and 'le'
// labels to 'real' labels.
if !(p.currentMF.GetType() == dto.MetricType_SUMMARY && p.currentLabelPair.GetName() == "quantile") &&
!(p.currentMF.GetType() == dto.MetricType_HISTOGRAM && p.currentLabelPair.GetName() == "le") {
if !(p.currentMF.GetType() == dto.MetricType_SUMMARY && p.currentLabelPair.GetName() == model.QuantileLabel) &&
!(p.currentMF.GetType() == dto.MetricType_HISTOGRAM && p.currentLabelPair.GetName() == model.BucketLabel) {
p.currentMetric.Label = append(p.currentMetric.Label, p.currentLabelPair)
}
if p.skipBlankTabIfCurrentBlankTab(); p.err != nil {
@ -306,7 +306,7 @@ func (p *Parser) startLabelValue() stateFn {
// - Quantile labels are special, will result in dto.Quantile later.
// - Other labels have to be added to currentLabels for signature calculation.
if p.currentMF.GetType() == dto.MetricType_SUMMARY {
if p.currentLabelPair.GetName() == "quantile" {
if p.currentLabelPair.GetName() == model.QuantileLabel {
if p.currentQuantile, p.err = strconv.ParseFloat(p.currentLabelPair.GetValue(), 64); p.err != nil {
// Create a more helpful error message.
p.parseError(fmt.Sprintf("expected float as value for 'quantile' label, got %q", p.currentLabelPair.GetValue()))
@ -318,7 +318,7 @@ func (p *Parser) startLabelValue() stateFn {
}
// Similar special treatment of histograms.
if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
if p.currentLabelPair.GetName() == "le" {
if p.currentLabelPair.GetName() == model.BucketLabel {
if p.currentBucket, p.err = strconv.ParseFloat(p.currentLabelPair.GetValue(), 64); p.err != nil {
// Create a more helpful error message.
p.parseError(fmt.Sprintf("expected float as value for 'le' label, got %q", p.currentLabelPair.GetValue()))