127 lines
4.2 KiB
Go
127 lines
4.2 KiB
Go
package tsdb
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import (
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"sort"
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"sync"
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"github.com/influxdata/influxdb/pkg/rhh"
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"github.com/prometheus/client_golang/prometheus"
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)
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// The following package variables act as singletons, to be shared by all
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// storage.Engine instantiations. This allows multiple Series Files to be
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// monitored within the same process.
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var (
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sms *seriesFileMetrics // main metrics
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ims *rhh.Metrics // hashmap specific metrics
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mmu sync.RWMutex
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)
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// PrometheusCollectors returns all the metrics associated with the tsdb package.
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func PrometheusCollectors() []prometheus.Collector {
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mmu.RLock()
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defer mmu.RUnlock()
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var collectors []prometheus.Collector
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if sms != nil {
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collectors = append(collectors, sms.PrometheusCollectors()...)
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}
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if ims != nil {
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collectors = append(collectors, ims.PrometheusCollectors()...)
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}
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return collectors
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}
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// namespace is the leading part of all published metrics for the Storage service.
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const namespace = "storage"
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const seriesFileSubsystem = "series_file" // sub-system associated with metrics for the Series File.
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type seriesFileMetrics struct {
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SeriesCreated *prometheus.CounterVec // Number of series created in Series File.
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Series *prometheus.GaugeVec // Number of series.
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DiskSize *prometheus.GaugeVec // Size occupied on disk.
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Segments *prometheus.GaugeVec // Number of segment files.
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CompactionsActive *prometheus.GaugeVec // Number of active compactions.
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CompactionDuration *prometheus.HistogramVec // Duration of compactions.
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// The following metrics include a ``"status" = {ok, error}` label
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Compactions *prometheus.CounterVec // Total number of compactions.
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}
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// newSeriesFileMetrics initialises the prometheus metrics for tracking the Series File.
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func newSeriesFileMetrics(labels prometheus.Labels) *seriesFileMetrics {
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names := []string{"series_file_partition"} // All metrics have this label.
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for k := range labels {
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names = append(names, k)
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}
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sort.Strings(names)
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totalCompactions := append(append([]string(nil), names...), "status")
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sort.Strings(totalCompactions)
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durationCompaction := append(append([]string(nil), names...), "component")
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sort.Strings(durationCompaction)
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return &seriesFileMetrics{
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SeriesCreated: prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: seriesFileSubsystem,
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Name: "series_created",
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Help: "Number of series created in Series File.",
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}, names),
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Series: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: seriesFileSubsystem,
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Name: "series_total",
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Help: "Number of series in Series File.",
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}, names),
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DiskSize: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: seriesFileSubsystem,
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Name: "disk_bytes",
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Help: "Number of bytes Series File is using on disk.",
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}, names),
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Segments: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: seriesFileSubsystem,
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Name: "segments_total",
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Help: "Number of segment files in Series File.",
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}, names),
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CompactionsActive: prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: seriesFileSubsystem,
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Name: "index_compactions_active",
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Help: "Number of active index compactions.",
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}, durationCompaction),
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CompactionDuration: prometheus.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: namespace,
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Subsystem: seriesFileSubsystem,
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Name: "index_compactions_duration_seconds",
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Help: "Time taken for a successful compaction of index.",
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// 30 buckets spaced exponentially between 5s and ~53 minutes.
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Buckets: prometheus.ExponentialBuckets(5.0, 1.25, 30),
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}, durationCompaction),
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Compactions: prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: seriesFileSubsystem,
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Name: "compactions_total",
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Help: "Number of compactions.",
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}, totalCompactions),
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}
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}
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// PrometheusCollectors satisfies the prom.PrometheusCollector interface.
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func (m *seriesFileMetrics) PrometheusCollectors() []prometheus.Collector {
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return []prometheus.Collector{
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m.SeriesCreated,
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m.Series,
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m.DiskSize,
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m.Segments,
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m.CompactionsActive,
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m.CompactionDuration,
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m.Compactions,
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}
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}
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