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metrics.go
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metrics.go
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// This directory was copied and adapted from https://github.com/grafana/agent/tree/main/pkg/metrics.
// We cannot vendor the agent in since the agent vendors loki in, which would cause a cyclic dependency.
// NOTE: many changes have been made to the original code for our use-case.
package cleaner
import (
"github.com/prometheus/client_golang/prometheus"
)
type Metrics struct {
r prometheus.Registerer
DiscoveryError *prometheus.CounterVec
SegmentError *prometheus.CounterVec
ManagedStorage prometheus.Gauge
AbandonedStorage prometheus.Gauge
CleanupRunsSuccess prometheus.Counter
CleanupRunsErrors prometheus.Counter
CleanupTimes prometheus.Histogram
}
func NewMetrics(r prometheus.Registerer) *Metrics {
m := Metrics{r: r}
m.DiscoveryError = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "cleaner_storage_error_total",
Help: "Errors encountered discovering local storage paths",
},
[]string{"storage"},
)
m.SegmentError = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "cleaner_segment_error_total",
Help: "Errors encountered finding most recent WAL segments",
},
[]string{"storage"},
)
m.ManagedStorage = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "cleaner_managed_storage",
Help: "Number of storage directories associated with managed instances",
},
)
m.AbandonedStorage = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "cleaner_abandoned_storage",
Help: "Number of storage directories not associated with any managed instance",
},
)
m.CleanupRunsSuccess = prometheus.NewCounter(
prometheus.CounterOpts{
Name: "cleaner_success_total",
Help: "Number of successfully removed abandoned WALs",
},
)
m.CleanupRunsErrors = prometheus.NewCounter(
prometheus.CounterOpts{
Name: "cleaner_errors_total",
Help: "Number of errors removing abandoned WALs",
},
)
m.CleanupTimes = prometheus.NewHistogram(
prometheus.HistogramOpts{
Name: "cleaner_cleanup_seconds",
Help: "Time spent performing each periodic WAL cleanup",
},
)
if r != nil {
r.MustRegister(
m.DiscoveryError,
m.SegmentError,
m.ManagedStorage,
m.AbandonedStorage,
m.CleanupRunsSuccess,
m.CleanupRunsErrors,
m.CleanupTimes,
)
}
return &m
}
func (m *Metrics) Unregister() {
if m.r == nil {
return
}
cs := []prometheus.Collector{
m.DiscoveryError,
m.SegmentError,
m.ManagedStorage,
m.AbandonedStorage,
m.CleanupRunsSuccess,
m.CleanupRunsErrors,
m.CleanupTimes,
}
for _, c := range cs {
m.r.Unregister(c)
}
}