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metrics.go
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/
metrics.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 registry
import (
"github.com/apache/servicecomb-service-center/server/metric"
"github.com/prometheus/client_golang/prometheus"
"time"
)
const (
success = "SUCCESS"
failure = "FAILURE"
)
var (
backendCounter = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: metric.FamilyName,
Subsystem: "db",
Name: "backend_total",
Help: "Gauge of the backend instance",
}, []string{"instance"})
operationCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: metric.FamilyName,
Subsystem: "db",
Name: "backend_operation_total",
Help: "Counter of backend operation",
}, []string{"instance", "operation", "status"})
operationLatency = prometheus.NewSummaryVec(
prometheus.SummaryOpts{
Namespace: metric.FamilyName,
Subsystem: "db",
Name: "backend_operation_durations_microseconds",
Help: "Latency of backend operation",
Objectives: metric.Pxx,
}, []string{"instance", "operation", "status"})
)
func init() {
prometheus.MustRegister(backendCounter, operationCounter, operationLatency)
}
func ReportBackendInstance(c int) {
instance := metric.InstanceName()
backendCounter.WithLabelValues(instance).Set(float64(c))
}
func ReportBackendOperationCompleted(operation string, err error, start time.Time) {
instance := metric.InstanceName()
elapsed := float64(time.Since(start).Nanoseconds()) / float64(time.Microsecond)
status := success
if err != nil {
status = failure
}
operationLatency.WithLabelValues(instance, operation, status).Observe(elapsed)
operationCounter.WithLabelValues(instance, operation, status).Inc()
}