465 lines
14 KiB
Go
465 lines
14 KiB
Go
package prometheus
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import (
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"errors"
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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/config"
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"github.com/stretchr/testify/require"
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"k8s.io/apimachinery/pkg/fields"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/testutil"
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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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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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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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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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_, err := fmt.Fprintln(w, sampleTextFormat)
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require.NoError(t, err)
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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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err := p.Init()
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require.NoError(t, err)
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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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require.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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require.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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require.True(t, acc.HasFloatField("test_metric", "value"))
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require.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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require.False(t, acc.HasTag("test_metric", "address"))
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require.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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_, err := fmt.Fprintln(w, sampleTextFormat)
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require.NoError(t, err)
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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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err := p.Init()
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require.NoError(t, err)
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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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require.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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require.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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require.True(t, acc.HasFloatField("test_metric", "value"))
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require.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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require.True(t, acc.TagValue("test_metric", "address") == tsAddress)
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require.True(t, acc.TagValue("test_metric", "url") == ts.URL)
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}
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func TestPrometheusGeneratesMetricsAlthoughFirstDNSFailsIntegration(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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_, err := fmt.Fprintln(w, sampleTextFormat)
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require.NoError(t, err)
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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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err := p.Init()
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require.NoError(t, err)
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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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require.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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require.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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require.True(t, acc.HasFloatField("test_metric", "value"))
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require.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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}
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func TestPrometheusGeneratesMetricsSlowEndpoint(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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time.Sleep(4 * time.Second)
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_, err := fmt.Fprintln(w, sampleTextFormat)
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require.NoError(t, err)
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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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ResponseTimeout: config.Duration(time.Second * 5),
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}
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err := p.Init()
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require.NoError(t, err)
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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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require.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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require.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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require.True(t, acc.HasFloatField("test_metric", "value"))
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require.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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require.False(t, acc.HasTag("test_metric", "address"))
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require.True(t, acc.TagValue("test_metric", "url") == ts.URL+"/metrics")
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}
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func TestPrometheusGeneratesMetricsSlowEndpointHitTheTimeout(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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time.Sleep(6 * time.Second)
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_, err := fmt.Fprintln(w, sampleTextFormat)
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require.NoError(t, err)
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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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ResponseTimeout: config.Duration(time.Second * 5),
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}
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err := p.Init()
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require.NoError(t, err)
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var acc testutil.Accumulator
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err = acc.GatherError(p.Gather)
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errMessage := fmt.Sprintf("error making HTTP request to %s/metrics: Get \"%s/metrics\": "+
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"context deadline exceeded (Client.Timeout exceeded while awaiting headers)", ts.URL, ts.URL)
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errExpected := errors.New(errMessage)
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require.Equal(t, errExpected, err)
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require.Error(t, err)
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}
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func TestPrometheusGeneratesMetricsSlowEndpointNewConfigParameter(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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time.Sleep(4 * time.Second)
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_, err := fmt.Fprintln(w, sampleTextFormat)
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require.NoError(t, err)
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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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Timeout: config.Duration(time.Second * 5),
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}
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err := p.Init()
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require.NoError(t, err)
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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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require.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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require.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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require.True(t, acc.HasFloatField("test_metric", "value"))
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require.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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require.False(t, acc.HasTag("test_metric", "address"))
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require.True(t, acc.TagValue("test_metric", "url") == ts.URL+"/metrics")
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}
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func TestPrometheusGeneratesMetricsSlowEndpointHitTheTimeoutNewConfigParameter(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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time.Sleep(6 * time.Second)
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_, err := fmt.Fprintln(w, sampleTextFormat)
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require.NoError(t, err)
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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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Timeout: config.Duration(time.Second * 5),
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}
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err := p.Init()
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require.NoError(t, err)
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var acc testutil.Accumulator
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err = acc.GatherError(p.Gather)
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require.ErrorContains(t, err, "error making HTTP request to "+ts.URL+"/metrics")
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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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_, err := fmt.Fprintln(w, sampleSummaryTextFormat)
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require.NoError(t, err)
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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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err := p.Init()
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require.NoError(t, err)
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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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require.True(t, acc.TagSetValue("prometheus", "quantile") == "0")
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require.True(t, acc.HasFloatField("prometheus", "go_gc_duration_seconds_sum"))
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require.True(t, acc.HasFloatField("prometheus", "go_gc_duration_seconds_count"))
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require.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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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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_, err := fmt.Fprintln(w, data)
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require.NoError(t, err)
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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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err := p.Init()
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require.NoError(t, err)
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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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_, err := fmt.Fprintln(w, sampleGaugeTextFormat)
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require.NoError(t, err)
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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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err := p.Init()
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require.NoError(t, err)
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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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require.True(t, acc.HasFloatField("prometheus", "go_goroutines"))
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require.True(t, acc.TagValue("prometheus", "url") == ts.URL+"/metrics")
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require.True(t, acc.HasTimestamp("prometheus", time.Unix(1490802350, 0)))
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}
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func TestPrometheusGeneratesMetricsWithIgnoreTimestamp(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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_, err := fmt.Fprintln(w, sampleTextFormat)
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require.NoError(t, err)
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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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IgnoreTimestamp: true,
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}
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err := p.Init()
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require.NoError(t, err)
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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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m, _ := acc.Get("test_metric")
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require.WithinDuration(t, time.Now(), m.Time, 5*time.Second)
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}
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func TestUnsupportedFieldSelector(t *testing.T) {
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fieldSelectorString := "spec.containerName=container"
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prom := &Prometheus{Log: testutil.Logger{}, KubernetesFieldSelector: fieldSelectorString}
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fieldSelector, _ := fields.ParseSelector(prom.KubernetesFieldSelector)
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isValid, invalidSelector := fieldSelectorIsSupported(fieldSelector)
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require.Equal(t, false, isValid)
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require.Equal(t, "spec.containerName", invalidSelector)
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}
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func TestInitConfigErrors(t *testing.T) {
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p := &Prometheus{
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MetricVersion: 2,
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Log: testutil.Logger{},
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URLs: nil,
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URLTag: "url",
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MonitorPods: true,
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PodScrapeScope: "node",
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PodScrapeInterval: 60,
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}
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// Both invalid IP addresses
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t.Run("Both invalid IP addresses", func(t *testing.T) {
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p.NodeIP = "10.240.0.0.0"
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t.Setenv("NODE_IP", "10.000.0.0.0")
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err := p.Init()
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require.Error(t, err)
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expectedMessage := "the node_ip config and the environment variable NODE_IP are not set or invalid; " +
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"cannot get pod list for monitor_kubernetes_pods using node scrape scope"
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require.Equal(t, expectedMessage, err.Error())
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})
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t.Run("Valid IP address", func(t *testing.T) {
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t.Setenv("NODE_IP", "10.000.0.0")
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p.KubernetesLabelSelector = "label0==label0, label0 in (=)"
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err := p.Init()
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expectedMessage := "error parsing the specified label selector(s): unable to parse requirement: found '=', expected: ',', ')' or identifier"
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require.Error(t, err, expectedMessage)
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p.KubernetesLabelSelector = "label0==label"
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p.KubernetesFieldSelector = "field,"
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err = p.Init()
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expectedMessage = "error parsing the specified field selector(s): invalid selector: 'field,'; can't understand 'field'"
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require.Error(t, err, expectedMessage)
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p.KubernetesFieldSelector = "spec.containerNames=containerNames"
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err = p.Init()
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expectedMessage = "the field selector spec.containerNames is not supported for pods"
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require.Error(t, err, expectedMessage)
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})
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}
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func TestInitConfigSelectors(t *testing.T) {
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p := &Prometheus{
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MetricVersion: 2,
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Log: testutil.Logger{},
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URLs: nil,
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URLTag: "url",
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MonitorPods: true,
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MonitorKubernetesPodsMethod: MonitorMethodSettings,
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PodScrapeInterval: 60,
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KubernetesLabelSelector: "app=test",
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KubernetesFieldSelector: "spec.nodeName=node-0",
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}
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err := p.Init()
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require.NoError(t, err)
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require.NotNil(t, p.podLabelSelector)
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require.NotNil(t, p.podFieldSelector)
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}
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