641 lines
19 KiB
Go
641 lines
19 KiB
Go
package metrics
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import (
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"context"
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"fmt"
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"net/http"
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"strconv"
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"testing"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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dto "github.com/prometheus/client_model/go"
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"github.com/stretchr/testify/assert"
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"github.com/traefik/traefik/v2/pkg/config/dynamic"
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th "github.com/traefik/traefik/v2/pkg/testhelpers"
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"github.com/traefik/traefik/v2/pkg/types"
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)
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func TestRegisterPromState(t *testing.T) {
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t.Cleanup(promState.reset)
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testCases := []struct {
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desc string
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prometheusSlice []*types.Prometheus
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initPromState bool
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unregisterPromState bool
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expectedNbRegistries int
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}{
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{
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desc: "Register once",
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prometheusSlice: []*types.Prometheus{{}},
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initPromState: true,
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unregisterPromState: false,
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expectedNbRegistries: 1,
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},
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{
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desc: "Register once with no promState init",
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prometheusSlice: []*types.Prometheus{{}},
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initPromState: false,
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unregisterPromState: false,
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expectedNbRegistries: 1,
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},
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{
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desc: "Register twice",
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prometheusSlice: []*types.Prometheus{{}, {}},
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initPromState: true,
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unregisterPromState: false,
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expectedNbRegistries: 2,
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},
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{
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desc: "Register twice with no promstate init",
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prometheusSlice: []*types.Prometheus{{}, {}},
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initPromState: false,
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unregisterPromState: false,
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expectedNbRegistries: 2,
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},
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{
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desc: "Register twice with unregister",
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prometheusSlice: []*types.Prometheus{{}, {}},
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initPromState: true,
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unregisterPromState: true,
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expectedNbRegistries: 2,
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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actualNbRegistries := 0
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for _, prom := range test.prometheusSlice {
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if test.initPromState {
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initStandardRegistry(prom)
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}
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if registerPromState(context.Background()) {
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actualNbRegistries++
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}
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if test.unregisterPromState {
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promRegistry.Unregister(promState)
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}
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promState.reset()
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}
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promRegistry.Unregister(promState)
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assert.Equal(t, test.expectedNbRegistries, actualNbRegistries)
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})
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}
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}
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func TestPrometheus(t *testing.T) {
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promState = newPrometheusState()
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promRegistry = prometheus.NewRegistry()
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t.Cleanup(promState.reset)
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prometheusRegistry := RegisterPrometheus(context.Background(), &types.Prometheus{AddEntryPointsLabels: true, AddRoutersLabels: true, AddServicesLabels: true})
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defer promRegistry.Unregister(promState)
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if !prometheusRegistry.IsEpEnabled() || !prometheusRegistry.IsRouterEnabled() || !prometheusRegistry.IsSvcEnabled() {
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t.Errorf("PrometheusRegistry should return true for IsEnabled(), IsRouterEnabled() and IsSvcEnabled()")
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}
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prometheusRegistry.ConfigReloadsCounter().Add(1)
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prometheusRegistry.ConfigReloadsFailureCounter().Add(1)
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prometheusRegistry.LastConfigReloadSuccessGauge().Set(float64(time.Now().Unix()))
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prometheusRegistry.LastConfigReloadFailureGauge().Set(float64(time.Now().Unix()))
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prometheusRegistry.
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TLSCertsNotAfterTimestampGauge().
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With("cn", "value", "serial", "value", "sans", "value").
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Set(float64(time.Now().Unix()))
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prometheusRegistry.
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EntryPointReqsCounter().
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With("code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http", "entrypoint", "http").
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Add(1)
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prometheusRegistry.
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EntryPointReqDurationHistogram().
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With("code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http", "entrypoint", "http").
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Observe(1)
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prometheusRegistry.
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EntryPointOpenConnsGauge().
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With("method", http.MethodGet, "protocol", "http", "entrypoint", "http").
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Set(1)
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prometheusRegistry.
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RouterReqsCounter().
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With("router", "demo", "service", "service1", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Add(1)
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prometheusRegistry.
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RouterReqsTLSCounter().
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With("router", "demo", "service", "service1", "tls_version", "foo", "tls_cipher", "bar").
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Add(1)
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prometheusRegistry.
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RouterReqDurationHistogram().
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With("router", "demo", "service", "service1", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Observe(10000)
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prometheusRegistry.
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RouterOpenConnsGauge().
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With("router", "demo", "service", "service1", "method", http.MethodGet, "protocol", "http").
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Set(1)
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prometheusRegistry.
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ServiceReqsCounter().
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With("service", "service1", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Add(1)
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prometheusRegistry.
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ServiceReqsTLSCounter().
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With("service", "service1", "tls_version", "foo", "tls_cipher", "bar").
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Add(1)
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prometheusRegistry.
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ServiceReqDurationHistogram().
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With("service", "service1", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Observe(10000)
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prometheusRegistry.
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ServiceOpenConnsGauge().
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With("service", "service1", "method", http.MethodGet, "protocol", "http").
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Set(1)
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prometheusRegistry.
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ServiceRetriesCounter().
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With("service", "service1").
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Add(1)
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prometheusRegistry.
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ServiceServerUpGauge().
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With("service", "service1", "url", "http://127.0.0.10:80").
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Set(1)
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delayForTrackingCompletion()
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metricsFamilies := mustScrape()
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testCases := []struct {
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name string
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labels map[string]string
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assert func(*dto.MetricFamily)
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}{
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{
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name: configReloadsTotalName,
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assert: buildCounterAssert(t, configReloadsTotalName, 1),
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},
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{
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name: configReloadsFailuresTotalName,
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assert: buildCounterAssert(t, configReloadsFailuresTotalName, 1),
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},
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{
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name: configLastReloadSuccessName,
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assert: buildTimestampAssert(t, configLastReloadSuccessName),
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},
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{
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name: configLastReloadFailureName,
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assert: buildTimestampAssert(t, configLastReloadFailureName),
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},
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{
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name: tlsCertsNotAfterTimestamp,
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labels: map[string]string{
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"cn": "value",
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"serial": "value",
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"sans": "value",
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},
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assert: buildTimestampAssert(t, tlsCertsNotAfterTimestamp),
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},
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{
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name: entryPointReqsTotalName,
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labels: map[string]string{
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"code": "200",
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"method": http.MethodGet,
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"protocol": "http",
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"entrypoint": "http",
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},
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assert: buildCounterAssert(t, entryPointReqsTotalName, 1),
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},
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{
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name: entryPointReqDurationName,
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labels: map[string]string{
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"code": "200",
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"method": http.MethodGet,
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"protocol": "http",
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"entrypoint": "http",
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},
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assert: buildHistogramAssert(t, entryPointReqDurationName, 1),
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},
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{
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name: entryPointOpenConnsName,
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labels: map[string]string{
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"method": http.MethodGet,
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"protocol": "http",
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"entrypoint": "http",
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},
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assert: buildGaugeAssert(t, entryPointOpenConnsName, 1),
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},
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{
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name: routerReqsTotalName,
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labels: map[string]string{
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"code": "200",
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"method": http.MethodGet,
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"protocol": "http",
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"service": "service1",
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"router": "demo",
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},
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assert: buildCounterAssert(t, routerReqsTotalName, 1),
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},
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{
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name: routerReqsTLSTotalName,
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labels: map[string]string{
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"service": "service1",
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"router": "demo",
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"tls_version": "foo",
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"tls_cipher": "bar",
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},
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assert: buildCounterAssert(t, routerReqsTLSTotalName, 1),
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},
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{
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name: routerReqDurationName,
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labels: map[string]string{
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"code": "200",
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"method": http.MethodGet,
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"protocol": "http",
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"service": "service1",
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"router": "demo",
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},
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assert: buildHistogramAssert(t, routerReqDurationName, 1),
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},
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{
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name: routerOpenConnsName,
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labels: map[string]string{
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"method": http.MethodGet,
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"protocol": "http",
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"service": "service1",
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"router": "demo",
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},
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assert: buildGaugeAssert(t, routerOpenConnsName, 1),
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},
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{
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name: serviceReqsTotalName,
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labels: map[string]string{
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"code": "200",
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"method": http.MethodGet,
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"protocol": "http",
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"service": "service1",
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},
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assert: buildCounterAssert(t, serviceReqsTotalName, 1),
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},
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{
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name: serviceReqsTLSTotalName,
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labels: map[string]string{
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"service": "service1",
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"tls_version": "foo",
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"tls_cipher": "bar",
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},
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assert: buildCounterAssert(t, serviceReqsTLSTotalName, 1),
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},
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{
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name: serviceReqDurationName,
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labels: map[string]string{
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"code": "200",
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"method": http.MethodGet,
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"protocol": "http",
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"service": "service1",
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},
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assert: buildHistogramAssert(t, serviceReqDurationName, 1),
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},
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{
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name: serviceOpenConnsName,
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labels: map[string]string{
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"method": http.MethodGet,
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"protocol": "http",
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"service": "service1",
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},
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assert: buildGaugeAssert(t, serviceOpenConnsName, 1),
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},
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{
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name: serviceRetriesTotalName,
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labels: map[string]string{
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"service": "service1",
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},
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assert: buildGreaterThanCounterAssert(t, serviceRetriesTotalName, 1),
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},
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{
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name: serviceServerUpName,
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labels: map[string]string{
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"service": "service1",
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"url": "http://127.0.0.10:80",
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},
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assert: buildGaugeAssert(t, serviceServerUpName, 1),
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.name, func(t *testing.T) {
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family := findMetricFamily(test.name, metricsFamilies)
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if family == nil {
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t.Errorf("gathered metrics do not contain %q", test.name)
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return
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}
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for _, label := range family.Metric[0].Label {
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val, ok := test.labels[*label.Name]
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if !ok {
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t.Errorf("%q metric contains unexpected label %q", test.name, *label.Name)
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} else if val != *label.Value {
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t.Errorf("label %q in metric %q has wrong value %q, expected %q", *label.Name, test.name, *label.Value, val)
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}
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}
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test.assert(family)
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})
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}
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}
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func TestPrometheusMetricRemoval(t *testing.T) {
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promState = newPrometheusState()
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promRegistry = prometheus.NewRegistry()
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t.Cleanup(promState.reset)
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prometheusRegistry := RegisterPrometheus(context.Background(), &types.Prometheus{AddEntryPointsLabels: true, AddServicesLabels: true, AddRoutersLabels: true})
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defer promRegistry.Unregister(promState)
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conf1 := dynamic.Configuration{
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HTTP: th.BuildConfiguration(
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th.WithRouters(
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th.WithRouter("foo@providerName", th.WithServiceName("bar")),
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th.WithRouter("router2", th.WithServiceName("bar@providerName")),
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),
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th.WithLoadBalancerServices(
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th.WithService("bar@providerName", th.WithServers(
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th.WithServer("http://localhost:9000"),
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th.WithServer("http://localhost:9999"),
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)),
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th.WithService("service1", th.WithServers(th.WithServer("http://localhost:9000"))),
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),
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),
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}
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conf2 := dynamic.Configuration{
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HTTP: th.BuildConfiguration(
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th.WithRouters(
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th.WithRouter("foo@providerName", th.WithServiceName("bar")),
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),
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th.WithLoadBalancerServices(
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th.WithService("bar@providerName", th.WithServers(th.WithServer("http://localhost:9000"))),
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),
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),
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}
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OnConfigurationUpdate(conf1, []string{"entrypoint1", "entrypoint2"})
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OnConfigurationUpdate(conf2, []string{"entrypoint1"})
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// Register some metrics manually that are not part of the active configuration.
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// Those metrics should be part of the /metrics output on the first scrape but
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// should be removed after that scrape.
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prometheusRegistry.
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EntryPointReqsCounter().
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With("entrypoint", "entrypoint2", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Add(1)
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prometheusRegistry.
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RouterReqsCounter().
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With("router", "router2", "service", "bar@providerName", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Add(1)
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prometheusRegistry.
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ServiceReqsCounter().
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With("service", "service1", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Add(1)
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prometheusRegistry.
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ServiceServerUpGauge().
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With("service", "bar@providerName", "url", "http://localhost:9999").
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Set(1)
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assertMetricsExist(t, mustScrape(), entryPointReqsTotalName, routerReqsTotalName, serviceReqsTotalName, serviceServerUpName)
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assertMetricsAbsent(t, mustScrape(), entryPointReqsTotalName, routerReqsTotalName, serviceReqsTotalName, serviceServerUpName)
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// To verify that metrics belonging to active configurations are not removed
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// here the counter examples.
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prometheusRegistry.
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EntryPointReqsCounter().
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With("entrypoint", "entrypoint1", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Add(1)
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prometheusRegistry.
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RouterReqsCounter().
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With("router", "foo@providerName", "service", "bar", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Add(1)
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prometheusRegistry.
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ServiceReqsCounter().
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With("service", "bar@providerName", "code", strconv.Itoa(http.StatusOK), "method", http.MethodGet, "protocol", "http").
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Add(1)
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prometheusRegistry.
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ServiceServerUpGauge().
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With("service", "bar@providerName", "url", "http://localhost:9000").
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Set(1)
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delayForTrackingCompletion()
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assertMetricsExist(t, mustScrape(), entryPointReqsTotalName, serviceReqsTotalName, serviceServerUpName, routerReqsTotalName)
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assertMetricsExist(t, mustScrape(), entryPointReqsTotalName, serviceReqsTotalName, serviceServerUpName, routerReqsTotalName)
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}
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func TestPrometheusRemovedMetricsReset(t *testing.T) {
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t.Cleanup(promState.reset)
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prometheusRegistry := RegisterPrometheus(context.Background(), &types.Prometheus{AddEntryPointsLabels: true, AddServicesLabels: true})
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defer promRegistry.Unregister(promState)
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conf1 := dynamic.Configuration{
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HTTP: th.BuildConfiguration(
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th.WithLoadBalancerServices(th.WithService("service",
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th.WithServers(th.WithServer("http://localhost:9000"))),
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),
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),
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}
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OnConfigurationUpdate(conf1, []string{"entrypoint1", "entrypoint2"})
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OnConfigurationUpdate(dynamic.Configuration{}, nil)
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labelNamesValues := []string{
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"service", "service",
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"code", strconv.Itoa(http.StatusOK),
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"method", http.MethodGet,
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"protocol", "http",
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}
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prometheusRegistry.
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ServiceReqsCounter().
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With(labelNamesValues...).
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Add(3)
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delayForTrackingCompletion()
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metricsFamilies := mustScrape()
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assertCounterValue(t, 3, findMetricFamily(serviceReqsTotalName, metricsFamilies), labelNamesValues...)
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// There is no dynamic configuration and so this metric will be deleted
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// after the first scrape.
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assertMetricsAbsent(t, mustScrape(), serviceReqsTotalName)
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prometheusRegistry.
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ServiceReqsCounter().
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With(labelNamesValues...).
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Add(1)
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delayForTrackingCompletion()
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metricsFamilies = mustScrape()
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assertCounterValue(t, 1, findMetricFamily(serviceReqsTotalName, metricsFamilies), labelNamesValues...)
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}
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// reset is a utility method for unit testing.
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// It should be called after each test run that changes promState internally
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// in order to avoid dependencies between unit tests.
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func (ps *prometheusState) reset() {
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ps.dynamicConfig = newDynamicConfig()
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ps.vectors = nil
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ps.deletedEP = nil
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ps.deletedRouters = nil
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ps.deletedServices = nil
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ps.deletedURLs = make(map[string]string)
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}
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// Tracking and gathering the metrics happens concurrently.
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// In practice this is no problem, because in case a tracked metric would miss the current scrape,
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// it would just be there in the next one.
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// That we can test reliably the tracking of all metrics here,
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// we sleep for a short amount of time,
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// to make sure the metric will be present in the next scrape.
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func delayForTrackingCompletion() {
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time.Sleep(250 * time.Millisecond)
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}
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func mustScrape() []*dto.MetricFamily {
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families, err := promRegistry.Gather()
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if err != nil {
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panic(fmt.Sprintf("could not gather metrics families: %s", err))
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}
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return families
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}
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func assertMetricsExist(t *testing.T, families []*dto.MetricFamily, metricNames ...string) {
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|
t.Helper()
|
|
|
|
for _, metricName := range metricNames {
|
|
if findMetricFamily(metricName, families) == nil {
|
|
t.Errorf("gathered metrics should contain %q", metricName)
|
|
}
|
|
}
|
|
}
|
|
|
|
func assertMetricsAbsent(t *testing.T, families []*dto.MetricFamily, metricNames ...string) {
|
|
t.Helper()
|
|
|
|
for _, metricName := range metricNames {
|
|
if findMetricFamily(metricName, families) != nil {
|
|
t.Errorf("gathered metrics should not contain %q", metricName)
|
|
}
|
|
}
|
|
}
|
|
|
|
func findMetricFamily(name string, families []*dto.MetricFamily) *dto.MetricFamily {
|
|
for _, family := range families {
|
|
if family.GetName() == name {
|
|
return family
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func findMetricByLabelNamesValues(family *dto.MetricFamily, labelNamesValues ...string) *dto.Metric {
|
|
if family == nil {
|
|
return nil
|
|
}
|
|
|
|
for _, metric := range family.Metric {
|
|
if hasMetricAllLabelPairs(metric, labelNamesValues...) {
|
|
return metric
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func hasMetricAllLabelPairs(metric *dto.Metric, labelNamesValues ...string) bool {
|
|
for i := 0; i < len(labelNamesValues); i += 2 {
|
|
name, val := labelNamesValues[i], labelNamesValues[i+1]
|
|
if !hasMetricLabelPair(metric, name, val) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func hasMetricLabelPair(metric *dto.Metric, labelName, labelValue string) bool {
|
|
for _, labelPair := range metric.Label {
|
|
if labelPair.GetName() == labelName && labelPair.GetValue() == labelValue {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func assertCounterValue(t *testing.T, want float64, family *dto.MetricFamily, labelNamesValues ...string) {
|
|
t.Helper()
|
|
|
|
metric := findMetricByLabelNamesValues(family, labelNamesValues...)
|
|
|
|
if metric == nil {
|
|
t.Error("metric must not be nil")
|
|
return
|
|
}
|
|
if metric.Counter == nil {
|
|
t.Errorf("metric %s must be a counter", family.GetName())
|
|
return
|
|
}
|
|
|
|
if cv := metric.Counter.GetValue(); cv != want {
|
|
t.Errorf("metric %s has value %v, want %v", family.GetName(), cv, want)
|
|
}
|
|
}
|
|
|
|
func buildCounterAssert(t *testing.T, metricName string, expectedValue int) func(family *dto.MetricFamily) {
|
|
t.Helper()
|
|
|
|
return func(family *dto.MetricFamily) {
|
|
if cv := int(family.Metric[0].Counter.GetValue()); cv != expectedValue {
|
|
t.Errorf("metric %s has value %d, want %d", metricName, cv, expectedValue)
|
|
}
|
|
}
|
|
}
|
|
|
|
func buildGreaterThanCounterAssert(t *testing.T, metricName string, expectedMinValue int) func(family *dto.MetricFamily) {
|
|
t.Helper()
|
|
|
|
return func(family *dto.MetricFamily) {
|
|
if cv := int(family.Metric[0].Counter.GetValue()); cv < expectedMinValue {
|
|
t.Errorf("metric %s has value %d, want at least %d", metricName, cv, expectedMinValue)
|
|
}
|
|
}
|
|
}
|
|
|
|
func buildHistogramAssert(t *testing.T, metricName string, expectedSampleCount int) func(family *dto.MetricFamily) {
|
|
t.Helper()
|
|
|
|
return func(family *dto.MetricFamily) {
|
|
if sc := int(family.Metric[0].Histogram.GetSampleCount()); sc != expectedSampleCount {
|
|
t.Errorf("metric %s has sample count value %d, want %d", metricName, sc, expectedSampleCount)
|
|
}
|
|
}
|
|
}
|
|
|
|
func buildGaugeAssert(t *testing.T, metricName string, expectedValue int) func(family *dto.MetricFamily) {
|
|
t.Helper()
|
|
|
|
return func(family *dto.MetricFamily) {
|
|
if gv := int(family.Metric[0].Gauge.GetValue()); gv != expectedValue {
|
|
t.Errorf("metric %s has value %d, want %d", metricName, gv, expectedValue)
|
|
}
|
|
}
|
|
}
|
|
|
|
func buildTimestampAssert(t *testing.T, metricName string) func(family *dto.MetricFamily) {
|
|
t.Helper()
|
|
|
|
return func(family *dto.MetricFamily) {
|
|
if ts := time.Unix(int64(family.Metric[0].Gauge.GetValue()), 0); time.Since(ts) > time.Minute {
|
|
t.Errorf("metric %s has wrong timestamp %v", metricName, ts)
|
|
}
|
|
}
|
|
}
|