81 lines
2.7 KiB
Go
81 lines
2.7 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package push_test
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import (
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"fmt"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/push"
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)
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var (
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completionTime = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "db_backup_last_completion_timestamp_seconds",
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Help: "The timestamp of the last completion of a DB backup, successful or not.",
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})
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successTime = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "db_backup_last_success_timestamp_seconds",
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Help: "The timestamp of the last successful completion of a DB backup.",
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})
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duration = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "db_backup_duration_seconds",
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Help: "The duration of the last DB backup in seconds.",
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})
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records = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "db_backup_records_processed",
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Help: "The number of records processed in the last DB backup.",
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})
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)
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func performBackup() (int, error) {
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// Perform the backup and return the number of backed up records and any
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// applicable error.
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// ...
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return 42, nil
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}
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func ExamplePusher_Add() {
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// We use a registry here to benefit from the consistency checks that
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// happen during registration.
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registry := prometheus.NewRegistry()
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registry.MustRegister(completionTime, duration, records)
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// Note that successTime is not registered.
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pusher := push.New("http://pushgateway:9091", "db_backup").Gatherer(registry)
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start := time.Now()
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n, err := performBackup()
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records.Set(float64(n))
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// Note that time.Since only uses a monotonic clock in Go1.9+.
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duration.Set(time.Since(start).Seconds())
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completionTime.SetToCurrentTime()
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if err != nil {
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fmt.Println("DB backup failed:", err)
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} else {
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// Add successTime to pusher only in case of success.
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// We could as well register it with the registry.
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// This example, however, demonstrates that you can
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// mix Gatherers and Collectors when handling a Pusher.
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pusher.Collector(successTime)
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successTime.SetToCurrentTime()
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}
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// Add is used here rather than Push to not delete a previously pushed
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// success timestamp in case of a failure of this backup.
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if err := pusher.Add(); err != nil {
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fmt.Println("Could not push to Pushgateway:", err)
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}
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}
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