traefik/pkg/metrics/statsd_test.go

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package metrics
import (
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"context"
"net/http"
"testing"
"time"
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"github.com/containous/traefik/v2/pkg/types"
"github.com/stvp/go-udp-testing"
)
func TestStatsD(t *testing.T) {
udp.SetAddr(":18125")
// This is needed to make sure that UDP Listener listens for data a bit longer, otherwise it will quit after a millisecond
udp.Timeout = 5 * time.Second
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statsdRegistry := RegisterStatsd(context.Background(), &types.Statsd{Address: ":18125", PushInterval: types.Duration(time.Second), AddEntryPointsLabels: true, AddServicesLabels: true})
defer StopStatsd()
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if !statsdRegistry.IsEpEnabled() || !statsdRegistry.IsSvcEnabled() {
t.Errorf("Statsd registry should return true for IsEnabled()")
}
expected := []string{
// We are only validating counts, as it is nearly impossible to validate latency, since it varies every run
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"traefik.service.request.total:2.000000|c\n",
"traefik.service.retries.total:2.000000|c\n",
"traefik.service.request.duration:10000.000000|ms",
"traefik.config.reload.total:1.000000|c\n",
"traefik.config.reload.total:1.000000|c\n",
"traefik.entrypoint.request.total:1.000000|c\n",
"traefik.entrypoint.request.duration:10000.000000|ms",
"traefik.entrypoint.connections.open:1.000000|g\n",
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"traefik.service.server.up:1.000000|g\n",
}
udp.ShouldReceiveAll(t, expected, func() {
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statsdRegistry.ServiceReqsCounter().With("service", "test", "code", string(http.StatusOK), "method", http.MethodGet).Add(1)
statsdRegistry.ServiceReqsCounter().With("service", "test", "code", string(http.StatusNotFound), "method", http.MethodGet).Add(1)
statsdRegistry.ServiceRetriesCounter().With("service", "test").Add(1)
statsdRegistry.ServiceRetriesCounter().With("service", "test").Add(1)
statsdRegistry.ServiceReqDurationHistogram().With("service", "test", "code", string(http.StatusOK)).Observe(10000)
statsdRegistry.ConfigReloadsCounter().Add(1)
statsdRegistry.ConfigReloadsFailureCounter().Add(1)
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statsdRegistry.EntryPointReqsCounter().With("entrypoint", "test").Add(1)
statsdRegistry.EntryPointReqDurationHistogram().With("entrypoint", "test").Observe(10000)
statsdRegistry.EntryPointOpenConnsGauge().With("entrypoint", "test").Set(1)
statsdRegistry.ServiceServerUpGauge().With("service:test", "url", "http://127.0.0.1").Set(1)
})
}