wip: migrate to mono-repo. SPN has already been moved to spn/

spn/terminal/metrics.go

@@ -0,0 +1,117 @@
+package terminal
+
+import (
+	"time"
+
+	"github.com/tevino/abool"
+
+	"github.com/safing/portbase/api"
+	"github.com/safing/portbase/metrics"
+)
+
+var metricsRegistered = abool.New()
+
+func registerMetrics() (err error) {
+	// Only register metrics once.
+	if !metricsRegistered.SetToIf(false, true) {
+		return nil
+	}
+
+	// Get scheduler config and calculat scaling.
+	schedulerConfig := getSchedulerConfig()
+	scaleSlotToSecondsFactor := float64(time.Second / schedulerConfig.SlotDuration)
+
+	// Register metrics from scheduler stats.
+
+	_, err = metrics.NewGauge(
+		"spn/scheduling/unit/slotpace/max",
+		nil,
+		metricFromInt(scheduler.GetMaxSlotPace, scaleSlotToSecondsFactor),
+		&metrics.Options{
+			Name:       "SPN Scheduling Max Slot Pace (scaled to per second)",
+			Permission: api.PermitUser,
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = metrics.NewGauge(
+		"spn/scheduling/unit/slotpace/leveled/max",
+		nil,
+		metricFromInt(scheduler.GetMaxLeveledSlotPace, scaleSlotToSecondsFactor),
+		&metrics.Options{
+			Name:       "SPN Scheduling Max Leveled Slot Pace (scaled to per second)",
+			Permission: api.PermitUser,
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = metrics.NewGauge(
+		"spn/scheduling/unit/slotpace/avg",
+		nil,
+		metricFromInt(scheduler.GetAvgSlotPace, scaleSlotToSecondsFactor),
+		&metrics.Options{
+			Name:       "SPN Scheduling Avg Slot Pace (scaled to per second)",
+			Permission: api.PermitUser,
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = metrics.NewGauge(
+		"spn/scheduling/unit/life/avg/seconds",
+		nil,
+		metricFromNanoseconds(scheduler.GetAvgUnitLife),
+		&metrics.Options{
+			Name:       "SPN Scheduling Avg Unit Life",
+			Permission: api.PermitUser,
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = metrics.NewGauge(
+		"spn/scheduling/unit/workslot/avg/seconds",
+		nil,
+		metricFromNanoseconds(scheduler.GetAvgWorkSlotDuration),
+		&metrics.Options{
+			Name:       "SPN Scheduling Avg Work Slot Duration",
+			Permission: api.PermitUser,
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	_, err = metrics.NewGauge(
+		"spn/scheduling/unit/catchupslot/avg/seconds",
+		nil,
+		metricFromNanoseconds(scheduler.GetAvgCatchUpSlotDuration),
+		&metrics.Options{
+			Name:       "SPN Scheduling Avg Catch-Up Slot Duration",
+			Permission: api.PermitUser,
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func metricFromInt(fn func() int64, scaleFactor float64) func() float64 {
+	return func() float64 {
+		return float64(fn()) * scaleFactor
+	}
+}
+
+func metricFromNanoseconds(fn func() int64) func() float64 {
+	return func() float64 {
+		return float64(fn()) / float64(time.Second)
+	}
+}