func newMetrics()

in silence/silence.go [240:304]
63 lines of code
3 McCabe index (conditional complexity)

func newMetrics(r prometheus.Registerer, s *Silences) *metrics {
	m := &metrics{}

	m.gcDuration = prometheus.NewSummary(prometheus.SummaryOpts{
		Name:       "alertmanager_silences_gc_duration_seconds",
		Help:       "Duration of the last silence garbage collection cycle.",
		Objectives: map[float64]float64{},
	})
	m.snapshotDuration = prometheus.NewSummary(prometheus.SummaryOpts{
		Name:       "alertmanager_silences_snapshot_duration_seconds",
		Help:       "Duration of the last silence snapshot.",
		Objectives: map[float64]float64{},
	})
	m.snapshotSize = prometheus.NewGauge(prometheus.GaugeOpts{
		Name: "alertmanager_silences_snapshot_size_bytes",
		Help: "Size of the last silence snapshot in bytes.",
	})
	m.maintenanceTotal = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "alertmanager_silences_maintenance_total",
		Help: "How many maintenances were executed for silences.",
	})
	m.maintenanceErrorsTotal = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "alertmanager_silences_maintenance_errors_total",
		Help: "How many maintenances were executed for silences that failed.",
	})
	m.queriesTotal = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "alertmanager_silences_queries_total",
		Help: "How many silence queries were received.",
	})
	m.queryErrorsTotal = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "alertmanager_silences_query_errors_total",
		Help: "How many silence received queries did not succeed.",
	})
	m.queryDuration = prometheus.NewHistogram(prometheus.HistogramOpts{
		Name: "alertmanager_silences_query_duration_seconds",
		Help: "Duration of silence query evaluation.",
	})
	m.propagatedMessagesTotal = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "alertmanager_silences_gossip_messages_propagated_total",
		Help: "Number of received gossip messages that have been further gossiped.",
	})
	if s != nil {
		m.silencesActive = newSilenceMetricByState(s, types.SilenceStateActive)
		m.silencesPending = newSilenceMetricByState(s, types.SilenceStatePending)
		m.silencesExpired = newSilenceMetricByState(s, types.SilenceStateExpired)
	}

	if r != nil {
		r.MustRegister(
			m.gcDuration,
			m.snapshotDuration,
			m.snapshotSize,
			m.queriesTotal,
			m.queryErrorsTotal,
			m.queryDuration,
			m.silencesActive,
			m.silencesPending,
			m.silencesExpired,
			m.propagatedMessagesTotal,
			m.maintenanceTotal,
			m.maintenanceErrorsTotal,
		)
	}
	return m
}