func TestMultiGauge(t *testing.T) {
g := metrics.NewMultiGauge(
"multidelta",
expvar.NewGauge("delta"),
prometheus.NewGauge(stdprometheus.GaugeOpts{
Namespace: "test",
Subsystem: "multi_gauge",
Name: "kappa",
Help: "Kappa gauge.",
}, []string{"a"}),
)
f := metrics.Field{Key: "a", Value: "aaa"}
g.With(f).Set(34)
if want, have := "34", stdexpvar.Get("delta").String(); want != have {
t.Errorf("expvar: want %q, have %q", want, have)
}
if want, have := strings.Join([]string{
`# HELP test_multi_gauge_kappa Kappa gauge.`,
`# TYPE test_multi_gauge_kappa gauge`,
`test_multi_gauge_kappa{a="aaa"} 34`,
}, "\n"), scrapePrometheus(t); !strings.Contains(have, want) {
t.Errorf("Prometheus metric stanza not found or incorrect\n%s", have)
}
g.With(f).Add(-40)
if want, have := "-6", stdexpvar.Get("delta").String(); want != have {
t.Errorf("expvar: want %q, have %q", want, have)
}
if want, have := strings.Join([]string{
`# HELP test_multi_gauge_kappa Kappa gauge.`,
`# TYPE test_multi_gauge_kappa gauge`,
`test_multi_gauge_kappa{a="aaa"} -6`,
}, "\n"), scrapePrometheus(t); !strings.Contains(have, want) {
t.Errorf("Prometheus metric stanza not found or incorrect\n%s", have)
}
}
func TestPrometheusGauge(t *testing.T) {
c := prometheus.NewGauge(stdprometheus.GaugeOpts{
Namespace: "test",
Subsystem: "prometheus_gauge",
Name: "foobar",
Help: "Dolor sit.",
}, []string{})
c.Set(42)
if want, have := strings.Join([]string{
`# HELP test_prometheus_gauge_foobar Dolor sit.`,
`# TYPE test_prometheus_gauge_foobar gauge`,
`test_prometheus_gauge_foobar 42`,
}, "\n"), teststat.ScrapePrometheus(t); !strings.Contains(have, want) {
t.Errorf("metric stanza not found or incorrect\n%s", have)
}
c.Add(-43)
if want, have := strings.Join([]string{
`# HELP test_prometheus_gauge_foobar Dolor sit.`,
`# TYPE test_prometheus_gauge_foobar gauge`,
`test_prometheus_gauge_foobar -1`,
}, "\n"), teststat.ScrapePrometheus(t); !strings.Contains(have, want) {
t.Errorf("metric stanza not found or incorrect\n%s", have)
}
}
package metrics
import (
"github.com/go-kit/kit/metrics"
kitprometheus "github.com/go-kit/kit/metrics/prometheus"
stdprometheus "github.com/prometheus/client_golang/prometheus"
"time"
)
var (
Fetching = kitprometheus.NewGauge(stdprometheus.GaugeOpts{
Namespace: "glia",
Subsystem: "fetcher",
Name: "fetching",
Help: "Number of fetching operations waiting to be processed.",
}, []string{})
Sending = kitprometheus.NewGauge(stdprometheus.GaugeOpts{
Namespace: "glia",
Subsystem: "sender",
Name: "sending",
Help: "Number of sending operations waiting to be processed.",
}, []string{})
FetchLatency = metrics.NewTimeHistogram(time.Microsecond, kitprometheus.NewSummary(stdprometheus.SummaryOpts{
Namespace: "glia",
Subsystem: "fetcher",
Name: "fetch_latency_microseconds",
Help: "Total duration of fetching in microseconds.",
}, []string{}))