237 lines
6.8 KiB
Go
237 lines
6.8 KiB
Go
package prometheus
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import (
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"fmt"
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"math"
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"net/http"
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"net/http/httptest"
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"net/url"
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"testing"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/testutil"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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const sampleTextFormat = `# HELP go_gc_duration_seconds A summary of the GC invocation durations.
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# TYPE go_gc_duration_seconds summary
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go_gc_duration_seconds{quantile="0"} 0.00010425500000000001
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go_gc_duration_seconds{quantile="0.25"} 0.000139108
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go_gc_duration_seconds{quantile="0.5"} 0.00015749400000000002
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go_gc_duration_seconds{quantile="0.75"} 0.000331463
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go_gc_duration_seconds{quantile="1"} 0.000667154
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go_gc_duration_seconds_sum 0.0018183950000000002
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go_gc_duration_seconds_count 7
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# HELP go_goroutines Number of goroutines that currently exist.
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# TYPE go_goroutines gauge
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go_goroutines 15
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# HELP test_metric An untyped metric with a timestamp
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# TYPE test_metric untyped
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test_metric{label="value"} 1.0 1490802350000
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`
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const sampleSummaryTextFormat = `# HELP go_gc_duration_seconds A summary of the GC invocation durations.
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# TYPE go_gc_duration_seconds summary
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go_gc_duration_seconds{quantile="0"} 0.00010425500000000001
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go_gc_duration_seconds{quantile="0.25"} 0.000139108
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go_gc_duration_seconds{quantile="0.5"} 0.00015749400000000002
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go_gc_duration_seconds{quantile="0.75"} 0.000331463
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go_gc_duration_seconds{quantile="1"} 0.000667154
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go_gc_duration_seconds_sum 0.0018183950000000002
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go_gc_duration_seconds_count 7
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`
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const sampleGaugeTextFormat = `
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# HELP go_goroutines Number of goroutines that currently exist.
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# TYPE go_goroutines gauge
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go_goroutines 15 1490802350000
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`
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func TestPrometheusGeneratesMetrics(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, sampleTextFormat)
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}))
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defer ts.Close()
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p := &Prometheus{
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Log: testutil.Logger{},
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URLs: []string{ts.URL},
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URLTag: "url",
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}
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var acc testutil.Accumulator
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err := acc.GatherError(p.Gather)
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require.NoError(t, err)
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assert.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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assert.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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assert.True(t, acc.HasFloatField("test_metric", "value"))
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assert.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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assert.False(t, acc.HasTag("test_metric", "address"))
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assert.True(t, acc.TagValue("test_metric", "url") == ts.URL+"/metrics")
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}
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func TestPrometheusGeneratesMetricsWithHostNameTag(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, sampleTextFormat)
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}))
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defer ts.Close()
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p := &Prometheus{
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Log: testutil.Logger{},
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KubernetesServices: []string{ts.URL},
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URLTag: "url",
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}
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u, _ := url.Parse(ts.URL)
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tsAddress := u.Hostname()
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var acc testutil.Accumulator
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err := acc.GatherError(p.Gather)
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require.NoError(t, err)
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assert.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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assert.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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assert.True(t, acc.HasFloatField("test_metric", "value"))
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assert.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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assert.True(t, acc.TagValue("test_metric", "address") == tsAddress)
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assert.True(t, acc.TagValue("test_metric", "url") == ts.URL)
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}
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func TestPrometheusGeneratesMetricsAlthoughFirstDNSFails(t *testing.T) {
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if testing.Short() {
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t.Skip("Skipping integration test in short mode")
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}
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, sampleTextFormat)
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}))
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defer ts.Close()
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p := &Prometheus{
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Log: testutil.Logger{},
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URLs: []string{ts.URL},
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KubernetesServices: []string{"http://random.telegraf.local:88/metrics"},
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}
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var acc testutil.Accumulator
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err := acc.GatherError(p.Gather)
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require.NoError(t, err)
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assert.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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assert.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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assert.True(t, acc.HasFloatField("test_metric", "value"))
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assert.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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}
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func TestPrometheusGeneratesSummaryMetricsV2(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, sampleSummaryTextFormat)
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}))
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defer ts.Close()
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p := &Prometheus{
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URLs: []string{ts.URL},
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URLTag: "url",
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MetricVersion: 2,
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}
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var acc testutil.Accumulator
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err := acc.GatherError(p.Gather)
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require.NoError(t, err)
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assert.True(t, acc.TagSetValue("prometheus", "quantile") == "0")
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assert.True(t, acc.HasFloatField("prometheus", "go_gc_duration_seconds_sum"))
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assert.True(t, acc.HasFloatField("prometheus", "go_gc_duration_seconds_count"))
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assert.True(t, acc.TagValue("prometheus", "url") == ts.URL+"/metrics")
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}
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func TestSummaryMayContainNaN(t *testing.T) {
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const data = `# HELP go_gc_duration_seconds A summary of the GC invocation durations.
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# TYPE go_gc_duration_seconds summary
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go_gc_duration_seconds{quantile="0"} NaN
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go_gc_duration_seconds{quantile="1"} NaN
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go_gc_duration_seconds_sum 42.0
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go_gc_duration_seconds_count 42
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`
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, data)
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}))
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defer ts.Close()
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p := &Prometheus{
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URLs: []string{ts.URL},
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URLTag: "",
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MetricVersion: 2,
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}
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var acc testutil.Accumulator
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err := p.Gather(&acc)
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require.NoError(t, err)
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expected := []telegraf.Metric{
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testutil.MustMetric(
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"prometheus",
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map[string]string{
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"quantile": "0",
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},
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map[string]interface{}{
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"go_gc_duration_seconds": math.NaN(),
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},
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time.Unix(0, 0),
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telegraf.Summary,
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),
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testutil.MustMetric(
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"prometheus",
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map[string]string{
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"quantile": "1",
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},
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map[string]interface{}{
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"go_gc_duration_seconds": math.NaN(),
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},
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time.Unix(0, 0),
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telegraf.Summary,
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),
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testutil.MustMetric(
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"prometheus",
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map[string]string{},
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map[string]interface{}{
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"go_gc_duration_seconds_sum": 42.0,
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"go_gc_duration_seconds_count": 42.0,
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},
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time.Unix(0, 0),
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telegraf.Summary,
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),
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}
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testutil.RequireMetricsEqual(t, expected, acc.GetTelegrafMetrics(),
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testutil.IgnoreTime(), testutil.SortMetrics())
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}
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func TestPrometheusGeneratesGaugeMetricsV2(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, sampleGaugeTextFormat)
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}))
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defer ts.Close()
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p := &Prometheus{
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URLs: []string{ts.URL},
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URLTag: "url",
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MetricVersion: 2,
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}
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var acc testutil.Accumulator
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err := acc.GatherError(p.Gather)
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require.NoError(t, err)
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assert.True(t, acc.HasFloatField("prometheus", "go_goroutines"))
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assert.True(t, acc.TagValue("prometheus", "url") == ts.URL+"/metrics")
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assert.True(t, acc.HasTimestamp("prometheus", time.Unix(1490802350, 0)))
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}
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