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dca9f3dd7c
21
go.mod
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21
go.mod
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@ -0,0 +1,21 @@
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module github.com/tardisx/caddy_prometheus_exporter
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go 1.21.4
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require (
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github.com/nxadm/tail v1.4.11
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github.com/prometheus/client_golang v1.18.0
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)
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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 v2.2.0 // indirect
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github.com/fsnotify/fsnotify v1.6.0 // indirect
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github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
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github.com/prometheus/client_model v0.5.0 // indirect
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github.com/prometheus/common v0.45.0 // indirect
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github.com/prometheus/procfs v0.12.0 // indirect
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golang.org/x/sys v0.15.0 // indirect
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google.golang.org/protobuf v1.31.0 // indirect
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gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
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)
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33
go.sum
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33
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 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
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github.com/cespare/xxhash/v2 v2.2.0/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/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
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github.com/fsnotify/fsnotify v1.6.0/go.mod h1:sl3t1tCWJFWoRz9R8WJCbQihKKwmorjAbSClcnxKAGw=
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github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
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github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
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github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
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github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 h1:jWpvCLoY8Z/e3VKvlsiIGKtc+UG6U5vzxaoagmhXfyg=
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github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0/go.mod h1:QUyp042oQthUoa9bqDv0ER0wrtXnBruoNd7aNjkbP+k=
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github.com/nxadm/tail v1.4.11 h1:8feyoE3OzPrcshW5/MJ4sGESc5cqmGkGCWlco4l0bqY=
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github.com/nxadm/tail v1.4.11/go.mod h1:OTaG3NK980DZzxbRq6lEuzgU+mug70nY11sMd4JXXHc=
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github.com/prometheus/client_golang v1.18.0 h1:HzFfmkOzH5Q8L8G+kSJKUx5dtG87sewO+FoDDqP5Tbk=
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github.com/prometheus/client_golang v1.18.0/go.mod h1:T+GXkCk5wSJyOqMIzVgvvjFDlkOQntgjkJWKrN5txjA=
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github.com/prometheus/client_model v0.5.0 h1:VQw1hfvPvk3Uv6Qf29VrPF32JB6rtbgI6cYPYQjL0Qw=
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github.com/prometheus/client_model v0.5.0/go.mod h1:dTiFglRmd66nLR9Pv9f0mZi7B7fk5Pm3gvsjB5tr+kI=
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github.com/prometheus/common v0.45.0 h1:2BGz0eBc2hdMDLnO/8n0jeB3oPrt2D08CekT0lneoxM=
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github.com/prometheus/common v0.45.0/go.mod h1:YJmSTw9BoKxJplESWWxlbyttQR4uaEcGyv9MZjVOJsY=
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github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k6Bo=
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github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo=
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golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
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golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
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google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
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google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
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gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
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gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
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133
main.go
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133
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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"io"
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"log"
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"log/slog"
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"net/http"
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"os"
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"github.com/nxadm/tail"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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type CaddyLogline struct {
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Level string `json:"level"`
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Ts float64 `json:"ts"`
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Logger string `json:"logger"`
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Msg string `json:"msg"`
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Request struct {
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RemoteIP string `json:"remote_ip"`
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RemotePort string `json:"remote_port"`
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ClientIP string `json:"client_ip"`
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Proto string `json:"proto"`
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Method string `json:"method"`
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Host string `json:"host"`
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URI string `json:"uri"`
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Headers struct {
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SecFetchSite []string `json:"Sec-Fetch-Site"`
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Accept []string `json:"Accept"`
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AcceptLanguage []string `json:"Accept-Language"`
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Connection []string `json:"Connection"`
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UpgradeInsecureRequests []string `json:"Upgrade-Insecure-Requests"`
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SecFetchMode []string `json:"Sec-Fetch-Mode"`
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UserAgent []string `json:"User-Agent"`
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SecFetchDest []string `json:"Sec-Fetch-Dest"`
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AcceptEncoding []string `json:"Accept-Encoding"`
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} `json:"headers"`
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} `json:"request"`
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BytesRead int `json:"bytes_read"`
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UserID string `json:"user_id"`
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Duration float64 `json:"duration"`
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Size int `json:"size"`
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Status int `json:"status"`
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RespHeaders struct {
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Server []string `json:"Server"`
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Etag []string `json:"Etag"`
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ContentType []string `json:"Content-Type"`
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LastModified []string `json:"Last-Modified"`
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AcceptRanges []string `json:"Accept-Ranges"`
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ContentLength []string `json:"Content-Length"`
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} `json:"resp_headers"`
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}
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func main() {
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requestsCounter := prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: "",
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Subsystem: "",
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Name: "requests",
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Help: "",
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ConstLabels: map[string]string{},
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}, []string{"method", "status_code", "host"})
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requestsDuration := prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: "",
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Subsystem: "",
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Name: "requests_duration",
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Help: "",
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ConstLabels: map[string]string{},
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}, []string{"method", "status_code", "host"})
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requestsSize := prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: "",
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Subsystem: "",
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Name: "requests_size",
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Help: "",
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ConstLabels: map[string]string{},
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}, []string{"method", "status_code", "host"})
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prometheus.MustRegister(requestsCounter, requestsDuration, requestsSize)
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http.Handle("/metrics", promhttp.Handler())
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go func() {
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log.Fatal(http.ListenAndServe("127.0.0.1:8191", nil))
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}()
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i := len(os.Args)
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if i < 2 {
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panic("need names")
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}
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agg := make(chan *tail.Line)
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for _, fn := range os.Args[1:] {
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slog.With("file", fn).Info("opening")
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t, err := tail.TailFile(fn, tail.Config{
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Follow: true,
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ReOpen: true,
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CompleteLines: true,
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Location: &tail.SeekInfo{
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Offset: 0,
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Whence: io.SeekEnd,
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},
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})
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if err != nil {
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panic(err)
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}
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go func(c chan *tail.Line) {
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for msg := range c {
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agg <- msg
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}
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}(t.Lines)
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}
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for line := range agg {
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js := CaddyLogline{}
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err := json.Unmarshal([]byte(line.Text), &js)
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if err != nil {
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slog.With(err).Error("could not unmarshal")
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continue
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}
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if js.Msg != "handled request" {
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continue
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}
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requestsCounter.WithLabelValues(js.Request.Method, fmt.Sprint(js.Status), js.Request.Host).Inc()
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requestsDuration.WithLabelValues(js.Request.Method, fmt.Sprint(js.Status), js.Request.Host).Add(js.Duration)
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requestsSize.WithLabelValues(js.Request.Method, fmt.Sprint(js.Status), js.Request.Host).Add(float64(js.Size))
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}
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}
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