/
main.go
65 lines (57 loc) · 1.77 KB
/
main.go
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package logmetrics
import (
"github.com/TosinShada/monorepo/support/log"
"github.com/prometheus/client_golang/prometheus"
"github.com/sirupsen/logrus"
)
// Metrics is a logrus hook-compliant struct that records metrics about logging
// when added to a logrus.Logger
type Metrics map[logrus.Level]prometheus.Counter
var DefaultMetrics = NewMetrics()
func init() {
_, DefaultMetrics = New()
}
// New creates a new logger according to horizon specifications.
func New() (l *log.Entry, m *Metrics) {
m = NewMetrics()
l = log.New()
l.SetLevel(logrus.WarnLevel)
l.AddHook(m)
return
}
// NewMetrics creates a new hook for recording metrics.
func NewMetrics() *Metrics {
return &Metrics{
logrus.DebugLevel: prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "horizon", Subsystem: "log", Name: "debug_total",
}),
logrus.InfoLevel: prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "horizon", Subsystem: "log", Name: "info_total",
}),
logrus.WarnLevel: prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "horizon", Subsystem: "log", Name: "warn_total",
}),
logrus.ErrorLevel: prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "horizon", Subsystem: "log", Name: "error_total",
}),
logrus.PanicLevel: prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "horizon", Subsystem: "log", Name: "panic_total",
}),
}
}
// Fire is triggered by logrus, in response to a logging event
func (m *Metrics) Fire(e *logrus.Entry) error {
(*m)[e.Level].Inc()
return nil
}
// Levels returns the logging levels that will trigger this hook to run. In
// this case, all of them.
func (m *Metrics) Levels() []logrus.Level {
return []logrus.Level{
logrus.DebugLevel,
logrus.InfoLevel,
logrus.WarnLevel,
logrus.ErrorLevel,
logrus.PanicLevel,
}
}