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Add support for histograms and summaries 

Signed-off-by: Sevag Hanssian <sevag.hanssian@gmail.com>
This commit is contained in:
Sevag Hanssian 2018-10-31 15:27:08 -07:00
parent 9416ff209b
commit e6fe89ce22
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GPG Key ID: 15472D208B254CF4
1 changed files with 37 additions and 14 deletions
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51
prometheus/registry.go
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@ -18,6 +18,7 @@ import (
"fmt"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"unicode/utf8"
@ -543,34 +544,56 @@ func (r *Registry) WriteToTextfile(path string) error {
output = append(output, fmt.Sprintf("# HELP %s %s", metricFamily.GetName(), metricFamily.GetHelp()))
output = append(output, fmt.Sprintf("# TYPE %s %s", metricFamily.GetName(), metricFamily.GetType().String()))
for _, metric := range metricFamily.GetMetric() {
labelString := ""
labelStrings := []string{}
if metric.GetLabel() != nil {
labelStrings := []string{}
for _, labelPair := range metric.GetLabel() {
labelStrings = append(labelStrings, fmt.Sprintf("%s=\"%s\"", labelPair.GetName(), labelPair.GetValue()))
}
labelString = fmt.Sprintf("{%s}", strings.Join(labelStrings, ","))
}
timestampString := ""
if metric.TimestampMs != nil {
timestampString = fmt.Sprintf(" %d", int(float64(metric.GetTimestampMs())*1000))
}
var value float64
switch metricFamily.GetType() {
case dto.MetricType_COUNTER:
value = metric.GetCounter().GetValue()
value := strconv.FormatFloat(metric.GetCounter().GetValue(), 'f', -1, 64)
labelString := fmt.Sprintf("{%s}", strings.Join(labelStrings, ","))
output = append(output, fmt.Sprintf("%s%s %s%s", metricFamily.GetName(), labelString, value, timestampString))
case dto.MetricType_GAUGE:
value = metric.GetGauge().GetValue()
case dto.MetricType_SUMMARY:
//value = metric.GetSummary().GetValue()
//what to do here
case dto.MetricType_HISTOGRAM:
//same
//value = metric.GetHistogram().GetValue()
value := strconv.FormatFloat(metric.GetGauge().GetValue(), 'f', -1, 64)
labelString := fmt.Sprintf("{%s}", strings.Join(labelStrings, ","))
output = append(output, fmt.Sprintf("%s%s %is%s", metricFamily.GetName(), labelString, value, timestampString))
case dto.MetricType_UNTYPED:
value = metric.GetUntyped().GetValue()
value := strconv.FormatFloat(metric.GetUntyped().GetValue(), 'f', -1, 64)
labelString := fmt.Sprintf("{%s}", strings.Join(labelStrings, ","))
output = append(output, fmt.Sprintf("%s%s %s%s", metricFamily.GetName(), labelString, value, timestampString))
case dto.MetricType_SUMMARY:
labelString := fmt.Sprintf("{%s}", strings.Join(labelStrings, ","))
count := metric.GetSummary().GetSampleCount()
output = append(output, fmt.Sprintf("%s_count%s %d%s", metricFamily.GetName(), labelString, count, timestampString))
sum := strconv.FormatFloat(metric.GetSummary().GetSampleSum(), 'f', -1, 64)
output = append(output, fmt.Sprintf("%s_sum%s %s%s", metricFamily.GetName(), labelString, sum, timestampString))
for _, quantile := range metric.GetSummary().GetQuantile() {
quantileName := strconv.FormatFloat(quantile.GetQuantile(), 'f', -1, 64)
quantileLabelStrings := append(labelStrings, fmt.Sprintf("quantile=\"%s\"", quantileName))
labelString = fmt.Sprintf("{%s}", strings.Join(quantileLabelStrings, ","))
value := strconv.FormatFloat(quantile.GetValue(), 'f', -1, 64)
output = append(output, fmt.Sprintf("%s_quantile%s %s%s", metricFamily.GetName(), labelString, value, timestampString))
}
case dto.MetricType_HISTOGRAM:
labelString := fmt.Sprintf("{%s}", strings.Join(labelStrings, ","))
count := metric.GetHistogram().GetSampleCount()
output = append(output, fmt.Sprintf("%s_count%s %f%s", metricFamily.GetName(), labelString, float64(count), timestampString))
sum := metric.GetHistogram().GetSampleSum()
output = append(output, fmt.Sprintf("%s_sum%s %f%s", metricFamily.GetName(), labelString, sum, timestampString))
for _, bucket := range metric.GetHistogram().GetBucket() {
bucketUpperBound := strconv.FormatFloat(bucket.GetUpperBound(), 'f', -1, 64)
bucketLabelStrings := append(labelStrings, fmt.Sprintf("le=\"%s\"", bucketUpperBound))
labelString = fmt.Sprintf("{%s}", strings.Join(bucketLabelStrings, ","))
value := bucket.GetCumulativeCount()
output = append(output, fmt.Sprintf("%s_bucket%s %d%s", metricFamily.GetName(), labelString, value, timestampString))
}
}
output = append(output, fmt.Sprintf("%s%s %f%s", metricFamily.GetName(), labelString, value, timestampString))
}
}
fmt.Println(strings.Join(output, "\n"))