frostfs-node/pkg/util/logger/metrics.go

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package logger
import (
"strconv"
"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/zap/zapcore"
)
const (
logSubsystem = "logger"
logLevelLabel = "level"
logDroppedLabel = "dropped"
)
type LogMetrics interface {
Inc(level zapcore.Level, dropped bool)
GetSamplingHook() func(e zapcore.Entry, sd zapcore.SamplingDecision)
}
type logMetrics struct {
logCount *prometheus.CounterVec
}
func NewLogMetrics(namespace string) LogMetrics {
return &logMetrics{
logCount: metrics.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Subsystem: logSubsystem,
Name: "entry_count",
Help: "Total log entries emitted or dropped by severity level",
}, []string{logLevelLabel, logDroppedLabel}),
}
}
func (m *logMetrics) Inc(level zapcore.Level, dropped bool) {
m.logCount.With(prometheus.Labels{
logLevelLabel: level.String(),
logDroppedLabel: strconv.FormatBool(dropped),
}).Inc()
}
func (m *logMetrics) GetSamplingHook() func(zapcore.Entry, zapcore.SamplingDecision) {
return func(e zapcore.Entry, sd zapcore.SamplingDecision) {
m.Inc(e.Level, sd == zapcore.LogDropped)
}
}