chore: completely drop prometheus support

internal/metrics/labels.go

@@ -1,29 +0,0 @@
-package metrics
-
-import "github.com/prometheus/client_golang/prometheus"
-
-type (
-	HTTPRouteMetricLabels struct {
-		Service, Method, Host, Visitor, Path string
-	}
-	StreamRouteMetricLabels struct {
-		Service, Visitor string
-	}
-)
-
-func (lbl *HTTPRouteMetricLabels) toPromLabels() prometheus.Labels {
-	return prometheus.Labels{
-		"service": lbl.Service,
-		"method":  lbl.Method,
-		"host":    lbl.Host,
-		"visitor": lbl.Visitor,
-		"path":    lbl.Path,
-	}
-}
-
-func (lbl *StreamRouteMetricLabels) toPromLabels() prometheus.Labels {
-	return prometheus.Labels{
-		"service": lbl.Service,
-		"visitor": lbl.Visitor,
-	}
-}

internal/metrics/metric.go

@@ -1,89 +0,0 @@
-package metrics
-
-import "github.com/prometheus/client_golang/prometheus"
-
-type (
-	Counter struct {
-		mv        *prometheus.CounterVec
-		collector prometheus.Counter
-	}
-	Gauge struct {
-		mv        *prometheus.GaugeVec
-		collector prometheus.Gauge
-	}
-	Labels interface {
-		toPromLabels() prometheus.Labels
-	}
-)
-
-func NewCounter(opts prometheus.CounterOpts, labels ...string) *Counter {
-	m := &Counter{
-		mv: prometheus.NewCounterVec(opts, labels),
-	}
-	if len(labels) == 0 {
-		m.collector = m.mv.WithLabelValues()
-		m.collector.Add(0)
-	}
-	prometheus.MustRegister(m)
-	return m
-}
-
-func NewGauge(opts prometheus.GaugeOpts, labels ...string) *Gauge {
-	m := &Gauge{
-		mv: prometheus.NewGaugeVec(opts, labels),
-	}
-	if len(labels) == 0 {
-		m.collector = m.mv.WithLabelValues()
-		m.collector.Set(0)
-	}
-	prometheus.MustRegister(m)
-	return m
-}
-
-func (c *Counter) Collect(ch chan<- prometheus.Metric) {
-	c.mv.Collect(ch)
-}
-
-func (c *Counter) Describe(ch chan<- *prometheus.Desc) {
-	c.mv.Describe(ch)
-}
-
-func (c *Counter) Inc() {
-	c.collector.Inc()
-}
-
-func (c *Counter) With(l Labels) *Counter {
-	return &Counter{mv: c.mv, collector: c.mv.With(l.toPromLabels())}
-}
-
-func (c *Counter) Delete(l Labels) {
-	c.mv.Delete(l.toPromLabels())
-}
-
-func (c *Counter) Reset() {
-	c.mv.Reset()
-}
-
-func (g *Gauge) Collect(ch chan<- prometheus.Metric) {
-	g.mv.Collect(ch)
-}
-
-func (g *Gauge) Describe(ch chan<- *prometheus.Desc) {
-	g.mv.Describe(ch)
-}
-
-func (g *Gauge) Set(v float64) {
-	g.collector.Set(v)
-}
-
-func (g *Gauge) With(l Labels) *Gauge {
-	return &Gauge{mv: g.mv, collector: g.mv.With(l.toPromLabels())}
-}
-
-func (g *Gauge) Delete(l Labels) {
-	g.mv.Delete(l.toPromLabels())
-}
-
-func (g *Gauge) Reset() {
-	g.mv.Reset()
-}

internal/metrics/metrics.go

@@ -1,105 +0,0 @@
-package metrics
-
-import (
-	"strings"
-
-	"github.com/prometheus/client_golang/prometheus"
-	"github.com/yusing/go-proxy/internal/common"
-)
-
-type (
-	RouteMetrics struct {
-		HTTPReqTotal,
-		HTTP2xx3xx,
-		HTTP4xx,
-		HTTP5xx *Counter
-		HTTPReqElapsed *Gauge
-	}
-
-	ServiceMetrics struct {
-		HealthStatus *Gauge
-	}
-)
-
-var (
-	rm RouteMetrics
-	sm ServiceMetrics
-)
-
-const (
-	routerNamespace     = "router"
-	routerHTTPSubsystem = "http"
-
-	serviceNamespace = "service"
-)
-
-func GetRouteMetrics() *RouteMetrics {
-	return &rm
-}
-
-func GetServiceMetrics() *ServiceMetrics {
-	return &sm
-}
-
-func (rm *RouteMetrics) UnregisterService(service string) {
-	lbls := &HTTPRouteMetricLabels{Service: service}
-	rm.HTTP2xx3xx.Delete(lbls)
-	rm.HTTP4xx.Delete(lbls)
-	rm.HTTP5xx.Delete(lbls)
-	rm.HTTPReqElapsed.Delete(lbls)
-}
-
-func init() {
-	if !common.PrometheusEnabled {
-		return
-	}
-	initRouteMetrics()
-	initServiceMetrics()
-}
-
-func initRouteMetrics() {
-	lbls := []string{"service", "method", "host", "visitor", "path"}
-	partitionsHelp := ", partitioned by " + strings.Join(lbls, ", ")
-	rm = RouteMetrics{
-		HTTPReqTotal: NewCounter(prometheus.CounterOpts{
-			Namespace: routerNamespace,
-			Subsystem: routerHTTPSubsystem,
-			Name:      "req_total",
-			Help:      "How many requests processed in total",
-		}),
-		HTTP2xx3xx: NewCounter(prometheus.CounterOpts{
-			Namespace: routerNamespace,
-			Subsystem: routerHTTPSubsystem,
-			Name:      "req_ok_count",
-			Help:      "How many 2xx-3xx requests processed" + partitionsHelp,
-		}, lbls...),
-		HTTP4xx: NewCounter(prometheus.CounterOpts{
-			Namespace: routerNamespace,
-			Subsystem: routerHTTPSubsystem,
-			Name:      "req_4xx_count",
-			Help:      "How many 4xx requests processed" + partitionsHelp,
-		}, lbls...),
-		HTTP5xx: NewCounter(prometheus.CounterOpts{
-			Namespace: routerNamespace,
-			Subsystem: routerHTTPSubsystem,
-			Name:      "req_5xx_count",
-			Help:      "How many 5xx requests processed" + partitionsHelp,
-		}, lbls...),
-		HTTPReqElapsed: NewGauge(prometheus.GaugeOpts{
-			Namespace: routerNamespace,
-			Subsystem: routerHTTPSubsystem,
-			Name:      "req_elapsed_ms",
-			Help:      "How long it took to process the request and respond a status code" + partitionsHelp,
-		}, lbls...),
-	}
-}
-
-func initServiceMetrics() {
-	sm = ServiceMetrics{
-		HealthStatus: NewGauge(prometheus.GaugeOpts{
-			Namespace: serviceNamespace,
-			Name:      "health_status",
-			Help:      "The health status of the router by service",
-		}, "service"),
-	}
-}