e3c37a46e2
at the first iteration, only the following metrics are collected:
- HTTP metrics of each API endpoint
- cache counter for request/hit/miss
- histogram of storage actions, including:
GetContent, PutContent, Stat, List, Move, and Delete
Signed-off-by: tifayuki <tifayuki@gmail.com>
73 lines
1.3 KiB
Go
73 lines
1.3 KiB
Go
package metrics
|
|
|
|
import "github.com/prometheus/client_golang/prometheus"
|
|
|
|
// Gauge is a metric that allows incrementing and decrementing a value
|
|
type Gauge interface {
|
|
Inc(...float64)
|
|
Dec(...float64)
|
|
|
|
// Add adds the provided value to the gauge's current value
|
|
Add(float64)
|
|
|
|
// Set replaces the gauge's current value with the provided value
|
|
Set(float64)
|
|
}
|
|
|
|
// LabeledGauge describes a gauge the must have values populated before use.
|
|
type LabeledGauge interface {
|
|
WithValues(labels ...string) Gauge
|
|
}
|
|
|
|
type labeledGauge struct {
|
|
pg *prometheus.GaugeVec
|
|
}
|
|
|
|
func (lg *labeledGauge) WithValues(labels ...string) Gauge {
|
|
return &gauge{pg: lg.pg.WithLabelValues(labels...)}
|
|
}
|
|
|
|
func (lg *labeledGauge) Describe(c chan<- *prometheus.Desc) {
|
|
lg.pg.Describe(c)
|
|
}
|
|
|
|
func (lg *labeledGauge) Collect(c chan<- prometheus.Metric) {
|
|
lg.pg.Collect(c)
|
|
}
|
|
|
|
type gauge struct {
|
|
pg prometheus.Gauge
|
|
}
|
|
|
|
func (g *gauge) Inc(vs ...float64) {
|
|
if len(vs) == 0 {
|
|
g.pg.Inc()
|
|
}
|
|
|
|
g.Add(sumFloat64(vs...))
|
|
}
|
|
|
|
func (g *gauge) Dec(vs ...float64) {
|
|
if len(vs) == 0 {
|
|
g.pg.Dec()
|
|
}
|
|
|
|
g.Add(-sumFloat64(vs...))
|
|
}
|
|
|
|
func (g *gauge) Add(v float64) {
|
|
g.pg.Add(v)
|
|
}
|
|
|
|
func (g *gauge) Set(v float64) {
|
|
g.pg.Set(v)
|
|
}
|
|
|
|
func (g *gauge) Describe(c chan<- *prometheus.Desc) {
|
|
g.pg.Describe(c)
|
|
}
|
|
|
|
func (g *gauge) Collect(c chan<- prometheus.Metric) {
|
|
g.pg.Collect(c)
|
|
}
|