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Add basic Prometheus metrics handler (#1830)

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* feat: Add Prometheus configuration options

* feat: Add Prometheus metrics handler

* build: prometheus became direct dependency

* docs: change description for prometheus metrics path
This commit is contained in:
Aleksey Lobanov 2022-10-03 02:59:53 +03:00 • committed by GitHub
parent 6a6fa3e3b5
commit 552989a05b
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 22 additions and 1 deletions
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12
cmd/root.go
View file

@ -13,6 +13,8 @@ import (
"github.com/navidrome/navidrome/resources"
"github.com/navidrome/navidrome/scheduler"
"github.com/oklog/run"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
@ -84,6 +86,9 @@ func startServer() (func() error, func(err error)) {
if conf.Server.ListenBrainz.Enabled {
a.MountRouter("ListenBrainz Auth", consts.URLPathNativeAPI+"/listenbrainz", CreateListenBrainzRouter())
}
if conf.Server.Prometheus.Enabled {
a.MountRouter("Prometheus metrics", conf.Server.Prometheus.MetricsPath, promhttp.Handler())
}
return a.Run(fmt.Sprintf("%s:%d", conf.Server.Address, conf.Server.Port))
}, func(err error) {
if err != nil {
@ -191,12 +196,19 @@ func init() {
rootCmd.Flags().String("imagecachesize", viper.GetString("imagecachesize"), "size of image (art work) cache. set to 0 to disable cache")
rootCmd.Flags().Bool("autoimportplaylists", viper.GetBool("autoimportplaylists"), "enable/disable .m3u playlist auto-import`")
rootCmd.Flags().Bool("prometheus.enabled", viper.GetBool("prometheus.enabled"), "enable/disable prometheus metrics endpoint`")
rootCmd.Flags().String("prometheus.metricspath", viper.GetString("prometheus.metricspath"), "http endpoint for prometheus metrics")
_ = viper.BindPFlag("address", rootCmd.Flags().Lookup("address"))
_ = viper.BindPFlag("port", rootCmd.Flags().Lookup("port"))
_ = viper.BindPFlag("sessiontimeout", rootCmd.Flags().Lookup("sessiontimeout"))
_ = viper.BindPFlag("scaninterval", rootCmd.Flags().Lookup("scaninterval"))
_ = viper.BindPFlag("baseurl", rootCmd.Flags().Lookup("baseurl"))
_ = viper.BindPFlag("uiloginbackgroundurl", rootCmd.Flags().Lookup("uiloginbackgroundurl"))
_ = viper.BindPFlag("prometheus.enabled", rootCmd.Flags().Lookup("prometheus.enabled"))
_ = viper.BindPFlag("prometheus.metricspath", rootCmd.Flags().Lookup("prometheus.metricspath"))
_ = viper.BindPFlag("enabletranscodingconfig", rootCmd.Flags().Lookup("enabletranscodingconfig"))
_ = viper.BindPFlag("transcodingcachesize", rootCmd.Flags().Lookup("transcodingcachesize"))
_ = viper.BindPFlag("imagecachesize", rootCmd.Flags().Lookup("imagecachesize"))

9
conf/configuration.go
View file

@ -57,6 +57,7 @@ type configOptions struct {
PasswordEncryptionKey string
ReverseProxyUserHeader string
ReverseProxyWhitelist string
Prometheus prometheusOptions
Scanner scannerOptions
@ -101,6 +102,11 @@ type listenBrainzOptions struct {
BaseURL string
}
type prometheusOptions struct {
Enabled bool
MetricsPath string
}
var (
Server = &configOptions{}
hooks []func()
@ -244,6 +250,9 @@ func init() {
viper.SetDefault("reverseproxyuserheader", "Remote-User")
viper.SetDefault("reverseproxywhitelist", "")
viper.SetDefault("prometheus.enabled", false)
viper.SetDefault("prometheus.metricspath", "/metrics")
viper.SetDefault("scanner.extractor", consts.DefaultScannerExtractor)
viper.SetDefault("scanner.genreseparators", ";/,")

2
go.mod
View file

@ -36,6 +36,7 @@ require (
github.com/onsi/ginkgo/v2 v2.2.0
github.com/onsi/gomega v1.20.2
github.com/pressly/goose v2.7.0+incompatible
github.com/prometheus/client_golang v1.12.1
github.com/robfig/cron/v3 v3.0.1
github.com/sirupsen/logrus v1.9.0
github.com/spf13/cobra v1.5.0
@ -177,7 +178,6 @@ require (
github.com/pkg/errors v0.9.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/polyfloyd/go-errorlint v1.0.2 // indirect
github.com/prometheus/client_golang v1.12.1 // indirect
github.com/prometheus/client_model v0.2.0 // indirect
github.com/prometheus/common v0.32.1 // indirect
github.com/prometheus/procfs v0.7.3 // indirect