136 lines
3.4 KiB
Go
136 lines
3.4 KiB
Go
package metrics
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import (
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"strconv"
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"time"
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"github.com/gofiber/fiber/v2"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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)
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const serviceName = "cp-service"
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var (
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labels = prometheus.Labels{"service": serviceName}
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KafkaConsumeSuccessCounter = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: prometheus.BuildFQName("cp", "kafka", "consume_success"),
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Help: "记录kafka消息消费成功的次数",
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ConstLabels: labels,
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}, []string{"topic", "bid"},
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)
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KafkaConsumeErrorCounter = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: prometheus.BuildFQName("cp", "kafka", "consume_error"),
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Help: "记录kafka消息消费失败的次数",
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ConstLabels: labels,
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}, []string{"topic", "bid"},
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)
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KafkaConsumeProcessingCounter = promauto.NewGaugeVec(prometheus.GaugeOpts{
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Name: prometheus.BuildFQName("cp", "kafka", "consume_processing"),
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Help: "当前正在处理的kafka消息个数",
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ConstLabels: labels,
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}, []string{"topic", "bid"},
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)
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requestInProgressTotal = promauto.NewGaugeVec(prometheus.GaugeOpts{
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Name: prometheus.BuildFQName("cp", "http", "requests_in_progress_total"),
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Help: "All the requests in progress",
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ConstLabels: labels,
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}, []string{"method"})
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requestsTotal = promauto.NewCounterVec(prometheus.CounterOpts{
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Name: prometheus.BuildFQName("cp", "http", "requests_total"),
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Help: "Count all http requests by status code, method and path.",
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ConstLabels: labels,
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},
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[]string{"status_code", "method", "path"},
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)
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requestDuration = promauto.NewHistogramVec(prometheus.HistogramOpts{
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Name: prometheus.BuildFQName("cp", "http", "request_duration_seconds"),
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Help: "Duration of all HTTP requests by status code, method and path.",
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ConstLabels: labels,
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Buckets: []float64{
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0.000000001, // 1ns
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0.000000002,
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0.000000005,
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0.00000001, // 10ns
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0.00000002,
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0.00000005,
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0.0000001, // 100ns
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0.0000002,
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0.0000005,
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0.000001, // 1µs
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0.000002,
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0.000005,
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0.00001, // 10µs
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0.00002,
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0.00005,
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0.0001, // 100µs
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0.0002,
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0.0005,
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0.001, // 1ms
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0.002,
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0.005,
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0.01, // 10ms
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0.02,
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0.05,
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0.1, // 100 ms
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0.2,
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0.5,
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1.0, // 1s
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2.0,
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5.0,
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10.0, // 10s
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15.0,
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20.0,
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30.0,
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},
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},
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[]string{"status_code", "method", "path"},
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)
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)
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func NewMiddleware(cfgs ...Config) fiber.Handler {
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cfg := configDefault(cfgs...)
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return func(ctx *fiber.Ctx) error {
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if cfg.Next != nil && cfg.Next(ctx) {
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return ctx.Next()
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}
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start := time.Now()
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method := ctx.Route().Method
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if ctx.Route().Path == "/metrics" {
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return ctx.Next()
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}
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requestInProgressTotal.WithLabelValues(method).Inc()
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defer requestInProgressTotal.WithLabelValues(method).Dec()
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err := ctx.Next()
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// initialize with default error code
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// https://docs.gofiber.io/guide/error-handling
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status := fiber.StatusInternalServerError
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if err != nil {
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if e, ok := err.(*fiber.Error); ok {
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// Get correct error code from fiber.Error type
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status = e.Code
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}
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} else {
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status = ctx.Response().StatusCode()
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}
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path := ctx.Route().Path
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statusCode := strconv.Itoa(status)
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requestsTotal.WithLabelValues(statusCode, method, path).Inc()
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elapsed := float64(time.Since(start).Nanoseconds()) / 1e9
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requestDuration.WithLabelValues(statusCode, method, path).Observe(elapsed)
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return err
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}
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}
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