[#375] Add log metrics

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>
This commit is contained in:
Alejandro Lopez 2023-06-09 11:47:39 +03:00 committed by Evgenii Stratonikov
parent 83d600ed77
commit 0c40d98f7a
4 changed files with 48 additions and 0 deletions

View file

@ -61,6 +61,7 @@ func main() {
cfg, err = newConfig()
exitErr(err)
logPrm.MetricsNamespace = "frostfs-ir"
err = logPrm.SetLevelString(
cfg.GetString("logger.level"),
)

View file

@ -542,6 +542,8 @@ func initCfg(appCfg *config.Config) *cfg {
logPrm, err := c.loggerPrm()
fatalOnErr(err)
logPrm.MetricsNamespace = "frostfs-node"
log, err := logger.NewLogger(logPrm)
fatalOnErr(err)

View file

@ -31,6 +31,9 @@ type Prm struct {
// support runtime rereading
level zapcore.Level
// MetricsNamespace is the namespace string used for log counter metrics
MetricsNamespace string
// do not support runtime rereading
}
@ -79,10 +82,15 @@ func NewLogger(prm *Prm) (*Logger, error) {
lvl := zap.NewAtomicLevelAt(prm.level)
m := newLogMetrics(prm.MetricsNamespace)
c := zap.NewProductionConfig()
c.Level = lvl
c.Encoding = "console"
c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
c.Sampling.Hook = func(e zapcore.Entry, sd zapcore.SamplingDecision) {
m.Inc(e.Level, sd == zapcore.LogDropped)
}
lZap, err := c.Build(
zap.AddStacktrace(zap.NewAtomicLevelAt(zap.FatalLevel)),

View file

@ -0,0 +1,37 @@
package logger
import (
"strconv"
"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/zap/zapcore"
)
const (
logSubsystem = "log"
logLevelLabel = "level"
logDroppedLabel = "dropped"
)
type logMetrics struct {
logCount *prometheus.CounterVec
}
func newLogMetrics(namespace string) *logMetrics {
return &logMetrics{
logCount: metrics.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Subsystem: logSubsystem,
Name: "log_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()
}