SansanandClaude Opus 5.5
f79f51ea4c
Metrics are served on METRICS_PORT (default 2112, "off" to disable), never on the public port. Besides the Go runtime and process metrics this adds: - http_requests_total and http_request_duration_seconds per route pattern, from an Echo middleware. - musicserver_songs_requested_total and musicserver_songs_played_total by pick mode (random, low, classic). The mode is now stored with each queued song (migration 000006, not released yet). - Library size, sync duration, last successful sync, broken songs from the last full sync, and the database connection pool. Refs #35, #36, #37 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
54 lines
2.2 KiB
Go
54 lines
2.2 KiB
Go
package metrics
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import (
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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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// MusicServer's own metrics. Labels only take values from small fixed sets: never song
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// names, IDs, tokens or IPs, since every value creates a new time series.
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var (
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// SongsRequested counts random songs handed out, by how they were picked.
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SongsRequested = promauto.NewCounterVec(prometheus.CounterOpts{
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Name: "musicserver_songs_requested_total",
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Help: "Random songs handed out, by how they were picked (random, low, classic).",
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}, []string{"mode"})
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// SongsPlayed counts songs marked as played, by how they were picked.
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SongsPlayed = promauto.NewCounterVec(prometheus.CounterOpts{
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Name: "musicserver_songs_played_total",
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Help: "Songs marked as played, by how they were picked (random, low, classic).",
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}, []string{"mode"})
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// LibrarySoundtracks is the number of soundtracks in the library.
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LibrarySoundtracks = promauto.NewGauge(prometheus.GaugeOpts{
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Name: "musicserver_library_soundtracks",
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Help: "Soundtracks in the library, counted at startup and after each sync.",
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})
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// LibrarySongs is the number of songs in the library.
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LibrarySongs = promauto.NewGauge(prometheus.GaugeOpts{
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Name: "musicserver_library_songs",
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Help: "Songs in the library, counted at startup and after each sync.",
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})
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// SyncDuration is how long syncs take, by type.
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SyncDuration = promauto.NewHistogramVec(prometheus.HistogramOpts{
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Name: "musicserver_sync_duration_seconds",
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Help: "How long a sync took, by type (full, changes).",
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Buckets: []float64{1, 5, 10, 30, 60, 120, 300, 600, 1200, 1800, 3600},
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}, []string{"type"})
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// SyncLastSuccess is when the last sync without errors finished.
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SyncLastSuccess = promauto.NewGauge(prometheus.GaugeOpts{
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Name: "musicserver_sync_last_success_timestamp_seconds",
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Help: "Unix time when the last sync without errors finished.",
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})
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// BrokenSongs is the number of songs the last full sync found missing and removed.
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BrokenSongs = promauto.NewGauge(prometheus.GaugeOpts{
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Name: "musicserver_broken_songs",
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Help: "Songs whose file was missing in the last full sync. They are removed from the library.",
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})
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)
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