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kodi_exporter.go
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kodi_exporter.go
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// Copyright (C) 2016 Nicolas Lamirault <nicolas.lamirault@gmail.com>
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"flag"
"fmt"
"net/http"
_ "net/http/pprof"
"os"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/log"
prom_version "github.com/prometheus/common/version"
"github.com/nlamirault/kodi_exporter/kodi"
"github.com/nlamirault/kodi_exporter/version"
)
const (
namespace = "kodi"
)
var (
up = prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "up"),
"Was the last query of Kodi successful.",
nil, nil,
)
artistCount = prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "audio_artists"),
"How many artists are in the audio library.",
nil, nil,
)
albumCount = prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "audio_albums"),
"How many albums are in the audio library.",
nil, nil,
)
songCount = prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "audio_songs"),
"How many songs are in the audio library.",
nil, nil,
)
movieCount = prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "video_movies"),
"How many movies are in the video library.",
nil, nil,
)
tvshowCount = prometheus.NewDesc(
prometheus.BuildFQName(namespace, "", "video_tvshows"),
"How many TV shows are in the video library.",
nil, nil,
)
// movieGenres = prometheus.NewDesc(
// prometheus.BuildFQName(namespace, "", "video_movies_genres"),
// "Genres for movies in the video library.",
// nil, nil,
// )
// tvshowGenres = prometheus.NewDesc(
// prometheus.BuildFQName(namespace, "", "video_tvshows_genres"),
// "Genres for TV shows in the video library.",
// nil, nil,
// )
// movieGenres = prometheus.NewGaugeVec(prometheus.GaugeOpts{
// Namespace: namespace,
// Name: "video_movies_genres",
// Help: "Genres for movies in the video library.",
// }, []string{"label"})
// tvshowGenres = prometheus.NewGaugeVec(prometheus.GaugeOpts{
// Namespace: namespace,
// Name: "video_tvshows_genres",
// Help: "Genres for TV shows in the video library.",
// }, []string{"label"})
)
// Exporter collects Kodi stats from the given server and exports them using
// the prometheus metrics package.
type Exporter struct {
URI string
Client *kodi.Client
}
// NewExporter returns an initialized Exporter.
func NewExporter(uri string, username string, password string) (*Exporter, error) {
log.Infoln("Setup Kodi client: %s %s", uri, username)
client, err := kodi.NewClient(uri, username, password)
if err != nil {
return nil, fmt.Errorf("Can't create the Kodi client: %s", err)
}
resp, err := client.ShowNotification(
`Prometheus`, `Prometheus exporter for Kodi is ready`)
if err != nil {
return nil, err
}
if resp.Error != nil {
return nil, fmt.Errorf("%s [%d]", resp.Error.Message, resp.Error.Code)
}
log.Infof("Kodi API connection: %s", resp.Result)
log.Debugln("Init exporter")
return &Exporter{
URI: uri,
Client: client,
}, nil
}
// Describe describes all the metrics ever exported by the Kodi exporter.
// It implements prometheus.Collector.
func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
ch <- up
ch <- artistCount
ch <- albumCount
ch <- songCount
ch <- movieCount
ch <- tvshowCount
// ch <- movieGenres
// ch <- tvshowGenres
}
// Collect fetches the stats from configured Kodi location and delivers them
// as Prometheus metrics.
// It implements prometheus.Collector.
func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
log.Infof("Kodi exporter starting")
if e.Client == nil {
log.Errorf("Kodi client not configured.")
return
}
resp, err := e.Client.Ping()
if err != nil || resp.Error != nil {
ch <- prometheus.MustNewConstMetric(
up, prometheus.GaugeValue, 0,
)
log.Errorf("%s [%d]", resp.Error.Message, resp.Error.Code)
return
}
log.Infof("Ping: %s", resp.Result)
ch <- prometheus.MustNewConstMetric(
up, prometheus.GaugeValue, 1,
)
e.collectAudioMetrics(ch)
e.collectVideoMetrics(ch)
log.Infof("Kodi exporter finished")
}
func (e *Exporter) collectAudioMetrics(ch chan<- prometheus.Metric) {
artistsResp, err := e.Client.AudioGetArtists()
if err != nil || artistsResp.Error != nil {
// FIXME: How should we handle a partial failure like this?
} else {
//size := float64(len(artistsResp.Result.Artists))
size := float64(artistsResp.Result.Limits.Total)
ch <- prometheus.MustNewConstMetric(
artistCount, prometheus.GaugeValue, size,
)
log.Infof("Artists: %d", size)
}
albumsResp, err := e.Client.AudioGetAlbums()
if err != nil || albumsResp.Error != nil {
// FIXME: How should we handle a partial failure like this?
} else {
//size := float64(len(albumsResp.Result.Albums))
size := float64(albumsResp.Result.Limits.Total)
ch <- prometheus.MustNewConstMetric(
albumCount, prometheus.GaugeValue, size,
)
log.Infof("Albums: %d", size)
}
songsResp, err := e.Client.AudioGetSongs()
if err != nil || songsResp.Error != nil {
// FIXME: How should we handle a partial failure like this?
} else {
//size := float64(len(songsResp.Result.Songs))
size := float64(songsResp.Result.Limits.Total)
ch <- prometheus.MustNewConstMetric(
songCount, prometheus.GaugeValue, size,
)
log.Infof("Songs: %d", size)
}
}
func (e *Exporter) collectVideoMetrics(ch chan<- prometheus.Metric) {
moviesResp, err := e.Client.VideoGetMovies()
if err != nil || moviesResp.Error != nil {
// FIXME: How should we handle a partial failure like this?
} else {
//size := float64(len(moviesResp.Result.Movies))
size := float64(moviesResp.Result.Limits.Total)
ch <- prometheus.MustNewConstMetric(
movieCount, prometheus.GaugeValue, size,
)
log.Infof("Movies: %d", size)
}
tvshowsResp, err := e.Client.VideoGetTVShows()
if err != nil || tvshowsResp.Error != nil {
// FIXME: How should we handle a partial failure like this?
} else {
//size := float64(len(tvshowsResp.Result.Movies))
size := float64(tvshowsResp.Result.Limits.Total)
ch <- prometheus.MustNewConstMetric(
tvshowCount, prometheus.GaugeValue, size,
)
log.Infof("TV Shows: %d", size)
}
moviesGenresResp, err := e.Client.VideoGetMoviesGenres()
if err != nil || moviesGenresResp.Error != nil {
// FIXME: How should we handle a partial failure like this?
log.Errorf("Kodi error : %v %v", err, moviesGenresResp.Error)
} else {
log.Infof("Movies Genres: %v", moviesGenresResp.Result)
}
tvshowsGenresResp, err := e.Client.VideoGetTVShowsGenres()
if err != nil || tvshowsGenresResp.Error != nil {
// FIXME: How should we handle a partial failure like this?
log.Errorf("Kodi error : %v %v", err, tvshowsGenresResp.Error)
} else {
log.Infof("TV Shows Genres: %v", tvshowsGenresResp.Result)
}
}
func init() {
prometheus.MustRegister(prom_version.NewCollector("kodi_exporter"))
}
func main() {
var (
showVersion = flag.Bool("version", false, "Print version information.")
listenAddress = flag.String("web.listen-address", ":9111", "Address to listen on for web interface and telemetry.")
metricsPath = flag.String("web.telemetry-path", "/metrics", "Path under which to expose metrics.")
kodiServer = flag.String("kodi.server", "localhost:9090", "HTTP API address of the Kodi server.")
kodiPort = flag.String("kodi.port", "8080", "HTTP port the Kodi JSONRPC API.")
kodiUsername = flag.String("kodi.username", "", "Username for authentication to the Kodi server.")
kodiPassword = flag.String("kodi.password", "", "Password for authentication to the Kodi server.")
)
flag.Parse()
if *showVersion {
fmt.Printf("Kodi Prometheus exporter. v%s\n", version.Version)
os.Exit(0)
}
log.Infoln("Starting kodi_exporter", prom_version.Info())
log.Infoln("Build context", prom_version.BuildContext())
exporter, err := NewExporter(fmt.Sprintf("http://%s:%s", *kodiServer, *kodiPort), *kodiUsername, *kodiPassword)
if err != nil {
log.Errorf("Can't create exporter : %s", err)
os.Exit(1)
}
log.Infoln("Register exporter")
prometheus.MustRegister(exporter)
http.Handle(*metricsPath, prometheus.Handler())
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`<html>
<head><title>Kodi Exporter</title></head>
<body>
<h1>Kodi Exporter</h1>
<p><a href='` + *metricsPath + `'>Metrics</a></p>
</body>
</html>`))
})
log.Infoln("Listening on", *listenAddress)
log.Fatal(http.ListenAndServe(*listenAddress, nil))
}