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metrics.go
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metrics.go
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// Copyright 2015 The Prometheus 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 file
import (
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/prometheus/discovery"
)
var _ discovery.DiscovererMetrics = (*fileMetrics)(nil)
type fileMetrics struct {
fileSDReadErrorsCount prometheus.Counter
fileSDScanDuration prometheus.Summary
fileWatcherErrorsCount prometheus.Counter
fileSDTimeStamp *TimestampCollector
metricRegisterer discovery.MetricRegisterer
}
func newDiscovererMetrics(reg prometheus.Registerer, rmi discovery.RefreshMetricsInstantiator) discovery.DiscovererMetrics {
fm := &fileMetrics{
fileSDReadErrorsCount: prometheus.NewCounter(
prometheus.CounterOpts{
Name: "prometheus_sd_file_read_errors_total",
Help: "The number of File-SD read errors.",
}),
fileSDScanDuration: prometheus.NewSummary(
prometheus.SummaryOpts{
Name: "prometheus_sd_file_scan_duration_seconds",
Help: "The duration of the File-SD scan in seconds.",
Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
}),
fileWatcherErrorsCount: prometheus.NewCounter(
prometheus.CounterOpts{
Name: "prometheus_sd_file_watcher_errors_total",
Help: "The number of File-SD errors caused by filesystem watch failures.",
}),
fileSDTimeStamp: NewTimestampCollector(),
}
fm.metricRegisterer = discovery.NewMetricRegisterer(reg, []prometheus.Collector{
fm.fileSDReadErrorsCount,
fm.fileSDScanDuration,
fm.fileWatcherErrorsCount,
fm.fileSDTimeStamp,
})
return fm
}
// Register implements discovery.DiscovererMetrics.
func (fm *fileMetrics) Register() error {
return fm.metricRegisterer.RegisterMetrics()
}
// Unregister implements discovery.DiscovererMetrics.
func (fm *fileMetrics) Unregister() {
fm.metricRegisterer.UnregisterMetrics()
}
func (fm *fileMetrics) init(disc *Discovery) {
fm.fileSDTimeStamp.addDiscoverer(disc)
}