owncast/metrics/metrics.go

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package metrics
import (
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"sync"
"time"
"github.com/owncast/owncast/config"
"github.com/owncast/owncast/core/data"
"github.com/owncast/owncast/models"
)
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// How often we poll for updates.
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const hardwareMetricsPollingInterval = 2 * time.Minute
const playbackMetricsPollingInterval = 2 * time.Minute
const (
// How often we poll for updates.
viewerMetricsPollingInterval = 2 * time.Minute
activeChatClientCountKey = "chat_client_count"
activeViewerCountKey = "viewer_count"
)
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// CollectedMetrics stores different collected + timestamped values.
type CollectedMetrics struct {
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m sync.Mutex `json:"-"`
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CPUUtilizations []TimestampedValue `json:"cpu"`
RAMUtilizations []TimestampedValue `json:"memory"`
DiskUtilizations []TimestampedValue `json:"disk"`
errorCount []TimestampedValue `json:"-"`
lowestBitrate []TimestampedValue `json:"-"`
medianBitrate []TimestampedValue `json:"-"`
highestBitrate []TimestampedValue `json:"-"`
medianSegmentDownloadSeconds []TimestampedValue `json:"-"`
maximumSegmentDownloadSeconds []TimestampedValue `json:"-"`
minimumSegmentDownloadSeconds []TimestampedValue `json:"-"`
minimumLatency []TimestampedValue `json:"-"`
maximumLatency []TimestampedValue `json:"-"`
medianLatency []TimestampedValue `json:"-"`
qualityVariantChanges []TimestampedValue `json:"-"`
streamHealthOverview *models.StreamHealthOverview
}
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// Metrics is the shared Metrics instance.
var metrics *CollectedMetrics
var _getStatus func() models.Status
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// Start will begin the metrics collection and alerting.
func Start(getStatus func() models.Status) {
_getStatus = getStatus
host := data.GetServerURL()
if host == "" {
host = "unknown"
}
labels = map[string]string{
"version": config.VersionNumber,
"host": host,
}
setupPrometheusCollectors()
metrics = new(CollectedMetrics)
go startViewerCollectionMetrics()
go func() {
for range time.Tick(hardwareMetricsPollingInterval) {
handlePolling()
}
}()
go func() {
for range time.Tick(playbackMetricsPollingInterval) {
handlePlaybackPolling()
}
}()
}
func handlePolling() {
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metrics.m.Lock()
defer metrics.m.Unlock()
// Collect hardware stats
collectCPUUtilization()
collectRAMUtilization()
collectDiskUtilization()
// Alerting
handleAlerting()
}
// GetMetrics will return the collected metrics.
func GetMetrics() *CollectedMetrics {
return metrics
}