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metrics.go
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/
metrics.go
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/*
Copyright The Accelerated Container Image Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package metrics
import (
"fmt"
"net/http"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
type ExporterConfig struct {
Enable bool `json:"enable"`
UriPrefix string `json:"uriPrefix"`
Port int `json:"port"`
}
var (
Config ExporterConfig
IsAlive = promauto.NewGauge(prometheus.GaugeOpts{
Name: "is_alive",
Help: "Indicates whether overlaybd-snapshotter is running or not.",
})
GRPCErrCount = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "grpc_error_count",
Help: "Error count of GRPC APIs.",
}, []string{"function"})
GRPCLatency = promauto.NewHistogramVec(prometheus.HistogramOpts{
Name: "grpc_latency_seconds",
Help: "Latency of GRPC APIs.",
Buckets: prometheus.ExponentialBuckets(0.0001, 2, 20),
}, []string{"function"})
)
func Init() {
http.Handle(Config.UriPrefix, promhttp.Handler())
http.ListenAndServe(":"+fmt.Sprintf("%d", Config.Port), nil)
}