first commit
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1136ac0b01
7 changed files with 212 additions and 0 deletions
1
.env.example
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1
.env.example
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TRAEWELLING_TOKEN=
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1
.gitignore
vendored
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1
.gitignore
vendored
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.env
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20
docker-compose.yml
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docker-compose.yml
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version: '3.8'
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services:
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traewelling-metrics:
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build:
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context: go/.
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dockerfile: Dockerfile
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#ports:
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# - "8080:8080" # Exponiere Port 8080 für Prometheus-Scraping
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restart: always # Neustart bei Fehlern oder Updates
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environment:
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- TRAEWELLING_TOKEN=${TRAEWELLING_TOKEN}
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networks:
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default:
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dns:
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ipv4_address: 172.28.0.245
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networks:
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dns:
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external: true
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28
go/Dockerfile
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go/Dockerfile
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@ -0,0 +1,28 @@
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# syntax=docker/dockerfile:1
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# Build the application from source
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FROM golang:1.21 AS build-stage
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WORKDIR /app
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COPY * ./
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RUN go mod download
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RUN CGO_ENABLED=0 GOOS=linux go build -o /main
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# Run the tests in the container
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FROM build-stage AS run-test-stage
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RUN go test -v ./...
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# Deploy the application binary into a lean image
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FROM gcr.io/distroless/base-debian11 AS build-release-stage
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WORKDIR /
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COPY --from=build-stage /main /main
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EXPOSE 8080
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USER nonroot:nonroot
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ENTRYPOINT ["/main"]
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17
go/go.mod
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go/go.mod
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module traewelling-exporter
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go 1.19
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require github.com/prometheus/client_golang v1.21.1
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require (
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github.com/beorn7/perks v1.0.1 // indirect
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github.com/cespare/xxhash/v2 v2.3.0 // indirect
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github.com/klauspost/compress v1.17.11 // indirect
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github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
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github.com/prometheus/client_model v0.6.1 // indirect
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github.com/prometheus/common v0.62.0 // indirect
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github.com/prometheus/procfs v0.15.1 // indirect
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golang.org/x/sys v0.28.0 // indirect
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google.golang.org/protobuf v1.36.1 // indirect
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)
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26
go/go.sum
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26
go/go.sum
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github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
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github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
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github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
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github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
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github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
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github.com/klauspost/compress v1.17.11/go.mod h1:pMDklpSncoRMuLFrf1W9Ss9KT+0rH90U12bZKk7uwG0=
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github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
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github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
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github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
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github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/prometheus/client_golang v1.21.1 h1:DOvXXTqVzvkIewV/CDPFdejpMCGeMcbGCQ8YOmu+Ibk=
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github.com/prometheus/client_golang v1.21.1/go.mod h1:U9NM32ykUErtVBxdvD3zfi+EuFkkaBvMb09mIfe0Zgg=
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github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
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github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
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github.com/prometheus/common v0.62.0 h1:xasJaQlnWAeyHdUBeGjXmutelfJHWMRr+Fg4QszZ2Io=
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github.com/prometheus/common v0.62.0/go.mod h1:vyBcEuLSvWos9B1+CyL7JZ2up+uFzXhkqml0W5zIY1I=
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github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
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github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
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github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
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golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
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golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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google.golang.org/protobuf v1.36.1 h1:yBPeRvTftaleIgM3PZ/WBIZ7XM/eEYAaEyCwvyjq/gk=
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google.golang.org/protobuf v1.36.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
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gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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119
go/main.go
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go/main.go
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package main
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"os"
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"time"
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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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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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var (
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totalTrips = promauto.NewGauge(prometheus.GaugeOpts{
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Name: "traewelling_total_trips",
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Help: "Gesamtanzahl der Fahrten",
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})
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totalDistance = promauto.NewGauge(prometheus.GaugeOpts{
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Name: "traewelling_total_distance_km",
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Help: "Gesamtdistanz aller Fahrten in Kilometern",
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})
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averageDuration = promauto.NewGauge(prometheus.GaugeOpts{
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Name: "traewelling_average_duration_minutes",
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Help: "Durchschnittliche Dauer der Fahrten in Minuten",
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})
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)
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type DashboardResponse struct {
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Data []struct {
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ID int `json:"id"`
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Train struct {
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Trip int `json:"trip"`
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Distance float64 `json:"distance"`
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Duration int `json:"duration"`
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Category string `json:"category"`
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LineName string `json:"lineName"`
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JourneyNumber int `json:"journeyNumber"`
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Origin struct {
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Name string `json:"name"`
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} `json:"origin"`
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Destination struct {
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Name string `json:"name"`
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} `json:"destination"`
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} `json:"train"`
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} `json:"data"`
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}
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func fetchTraewellingData() (*DashboardResponse, error) {
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url := "https://traewelling.de/api/v1/dashboard"
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client := &http.Client{Timeout: 10 * time.Second}
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return nil, fmt.Errorf("Fehler beim Erstellen der Anfrage: %v", err)
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}
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token := os.Getenv("TRAEWELLING_TOKEN")
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if token == "" {
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return nil, fmt.Errorf("TRAEWELLING_TOKEN ist nicht gesetzt")
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}
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req.Header.Set("Authorization", "Bearer "+token)
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req.Header.Set("Accept", "application/json")
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resp, err := client.Do(req)
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if err != nil {
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return nil, fmt.Errorf("Fehler beim Senden der Anfrage: %v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("Fehlerhafte Antwort: %d", resp.StatusCode)
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}
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var apiResponse DashboardResponse
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err = json.NewDecoder(resp.Body).Decode(&apiResponse)
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if err != nil {
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return nil, fmt.Errorf("Fehler beim Parsen der JSON-Daten: %v", err)
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}
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return &apiResponse, nil
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}
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func updateMetrics() {
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data, err := fetchTraewellingData()
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if err != nil {
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fmt.Printf("Fehler beim Abrufen der Daten: %v\n", err)
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return
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}
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var totalTripsCount int
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var totalDistanceSum float64
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var totalDurationSum int
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for _, trip := range data.Data {
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totalTripsCount++
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totalDistanceSum += trip.Train.Distance / 1000
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totalDurationSum += trip.Train.Duration
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}
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totalTrips.Set(float64(totalTripsCount))
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totalDistance.Set(totalDistanceSum)
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if totalTripsCount > 0 {
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averageDuration.Set(float64(totalDurationSum) / float64(totalTripsCount))
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}
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}
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func main() {
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go func() {
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for {
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updateMetrics()
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time.Sleep(30 * time.Second)
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}
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}()
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http.Handle("/metrics", promhttp.Handler())
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fmt.Println("Server läuft auf Port 8080...")
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http.ListenAndServe(":8080", nil)
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}
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