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Add WriteToTextfile test 

Signed-off-by: Sevag Hanssian <sevag.hanssian@gmail.com>
This commit is contained in:
Sevag Hanssian 2018-10-31 23:34:50 -07:00
parent c5bdd15ac3
commit 1d54dabd43
No known key found for this signature in database
GPG Key ID: 15472D208B254CF4
2 changed files with 142 additions and 12 deletions
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55
prometheus/registry.go
View File

@ -16,6 +16,7 @@ package prometheus
import (
"bytes"
"fmt"
"os"
"runtime"
"sort"
"strconv"
@ -539,10 +540,12 @@ func (r *Registry) WriteToTextfile(path string) error {
if err != nil {
return err
}
output := []string{}
outputMap := map[string][]string{}
metricNames := []string{}
for _, metricFamily := range metricFamilies {
output := []string{}
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()))
output = append(output, fmt.Sprintf("# TYPE %s %s", metricFamily.GetName(), strings.ToLower(metricFamily.GetType().String())))
for _, metric := range metricFamily.GetMetric() {
labelStrings := []string{}
if metric.GetLabel() != nil {
@ -570,33 +573,61 @@ func (r *Registry) WriteToTextfile(path string) error {
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, ","))
loopLabelString := 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))
output = append(output, fmt.Sprintf("%s%s %s%s", metricFamily.GetName(), loopLabelString, value, timestampString))
}
output = append(output, fmt.Sprintf("%s_sum%s %s%s", metricFamily.GetName(), labelString, sum, timestampString))
output = append(output, fmt.Sprintf("%s_count%s %d%s", metricFamily.GetName(), labelString, count, 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))
sum := strconv.FormatFloat(metric.GetHistogram().GetSampleSum(), 'f', -1, 64)
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, ","))
loopLabelString := 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_bucket%s %d%s", metricFamily.GetName(), loopLabelString, value, timestampString))
}
infBucketLabelStrings := append(labelStrings, "le=\"+Inf\"")
infLabelString := fmt.Sprintf("{%s}", strings.Join(infBucketLabelStrings, ","))
output = append(output, fmt.Sprintf("%s_bucket%s %d%s", metricFamily.GetName(), infLabelString, count, timestampString))
output = append(output, fmt.Sprintf("%s_sum%s %s%s", metricFamily.GetName(), labelString, sum, timestampString))
output = append(output, fmt.Sprintf("%s_count%s %d%s", metricFamily.GetName(), labelString, count, timestampString))
}
}
outputMap[metricFamily.GetName()] = output
metricNames = append(metricNames, metricFamily.GetName())
}
fmt.Println(strings.Join(output, "\n"))
tmppath := fmt.Sprintf("%s.%d", path, os.Getpid())
f, err := os.Create(tmppath)
if err != nil {
return err
}
sort.Strings(metricNames)
outStr := ""
for _, metricName := range metricNames {
outStr = fmt.Sprintf("%s%s\n", outStr, strings.Join(outputMap[metricName], "\n"))
}
_, err = f.WriteString(outStr)
if err != nil {
return err
}
if err := os.Rename(tmppath, path); err != nil {
return err
}
return nil
}

99
prometheus/registry_test.go
View File

@ -21,9 +21,11 @@ package prometheus_test
import (
"bytes"
"io/ioutil"
"math/rand"
"net/http"
"net/http/httptest"
"os"
"sync"
"testing"
"time"
@ -871,3 +873,100 @@ func TestHistogramVecRegisterGatherConcurrency(t *testing.T) {
close(quit)
wg.Wait()
}
func TestWriteToTextfile(t *testing.T) {
expectedOut := `# HELP test_counter test counter
# TYPE test_counter counter
test_counter{name="qux"} 1
# HELP test_gauge test gauge
# TYPE test_gauge gauge
test_gauge{name="baz"} 1.1
# HELP test_hist test histogram
# TYPE test_hist histogram
test_hist_bucket{name="bar",le="0.005"} 0
test_hist_bucket{name="bar",le="0.01"} 0
test_hist_bucket{name="bar",le="0.025"} 0
test_hist_bucket{name="bar",le="0.05"} 0
test_hist_bucket{name="bar",le="0.1"} 0
test_hist_bucket{name="bar",le="0.25"} 0
test_hist_bucket{name="bar",le="0.5"} 0
test_hist_bucket{name="bar",le="1"} 1
test_hist_bucket{name="bar",le="2.5"} 1
test_hist_bucket{name="bar",le="5"} 2
test_hist_bucket{name="bar",le="10"} 2
test_hist_bucket{name="bar",le="+Inf"} 2
test_hist_sum{name="bar"} 3.64
test_hist_count{name="bar"} 2
# HELP test_summary test summary
# TYPE test_summary summary
test_summary{name="foo",quantile="0.5"} 10
test_summary{name="foo",quantile="0.9"} 20
test_summary{name="foo",quantile="0.99"} 20
test_summary_sum{name="foo"} 30
test_summary_count{name="foo"} 2
`
registry := prometheus.NewRegistry()
summary := prometheus.NewSummaryVec(
prometheus.SummaryOpts{
Name: "test_summary",
Help: "test summary",
},
[]string{"name"},
)
histogram := prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Name: "test_hist",
Help: "test histogram",
},
[]string{"name"},
)
gauge := prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "test_gauge",
Help: "test gauge",
},
[]string{"name"},
)
counter := prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "test_counter",
Help: "test counter",
},
[]string{"name"},
)
registry.MustRegister(summary)
registry.MustRegister(histogram)
registry.MustRegister(gauge)
registry.MustRegister(counter)
summary.With(prometheus.Labels{"name": "foo"}).Observe(10)
summary.With(prometheus.Labels{"name": "foo"}).Observe(20)
histogram.With(prometheus.Labels{"name": "bar"}).Observe(0.93)
histogram.With(prometheus.Labels{"name": "bar"}).Observe(2.71)
gauge.With(prometheus.Labels{"name": "baz"}).Set(1.1)
counter.With(prometheus.Labels{"name": "qux"}).Inc()
tmpfile, err := ioutil.TempFile("", "prom_registry_test")
if err != nil {
t.Fatal(err)
}
defer os.Remove(tmpfile.Name())
registry.WriteToTextfile(tmpfile.Name())
fileBytes, err := ioutil.ReadFile(tmpfile.Name())
if err != nil {
t.Fatal(err)
}
fileContents := string(fileBytes)
if fileContents != expectedOut {
t.Error("file contents didn't match unexpected")
}
}