Extend the example for pushing to pushgateway

This commit is contained in:
beorn7 2016-11-18 20:16:57 +01:00
parent 87297c8d5c
commit e72c7946c6
2 changed files with 84 additions and 21 deletions

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@ -0,0 +1,83 @@
// Copyright 2016 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.
// Copyright (c) 2013, The Prometheus Authors
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be found
// in the LICENSE file.
package push_test
import (
"fmt"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/push"
)
var (
completionTime = prometheus.NewGauge(prometheus.GaugeOpts{
Name: "db_backup_last_completion_timestamp_seconds",
Help: "The timestamp of the last completion of a DB backup, successful or not.",
})
successTime = prometheus.NewGauge(prometheus.GaugeOpts{
Name: "db_backup_last_success_timestamp_seconds",
Help: "The timestamp of the last successful completion of a DB backup.",
})
duration = prometheus.NewGauge(prometheus.GaugeOpts{
Name: "db_backup_duration_seconds",
Help: "The duration of the last DB backup in seconds.",
})
records = prometheus.NewGauge(prometheus.GaugeOpts{
Name: "db_backup_records_processed",
Help: "The number of records processed in the last DB backup.",
})
)
func performBackup() (int, error) {
// Perform the backup and return the number of backed up records and any
// applicable error.
// ...
return 42, nil
}
func ExampleAddFromGatherer() {
registry := prometheus.NewRegistry()
registry.MustRegister(completionTime, duration, records)
// Note that successTime is not registered at this time.
start := time.Now()
n, err := performBackup()
records.Set(float64(n))
duration.Set(time.Since(start).Seconds())
completionTime.SetToCurrentTime()
if err != nil {
fmt.Println("DB backup failed:", err)
} else {
// Only now register successTime.
registry.MustRegister(successTime)
successTime.SetToCurrentTime()
}
// AddFromGatherer is used here rather than FromGatherer to not delete a
// previously pushed success timestamp in case of a failure of this
// backup.
if err := push.AddFromGatherer(
"db_backup", nil,
"http://pushgateway:9091",
registry,
); err != nil {
fmt.Println("Could not push to Pushgateway:", err)
}
}

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@ -15,7 +15,6 @@ package push_test
import ( import (
"fmt" "fmt"
"time"
"github.com/prometheus/client_golang/prometheus" "github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/push" "github.com/prometheus/client_golang/prometheus/push"
@ -26,7 +25,7 @@ func ExampleCollectors() {
Name: "db_backup_last_completion_timestamp_seconds", Name: "db_backup_last_completion_timestamp_seconds",
Help: "The timestamp of the last successful completion of a DB backup.", Help: "The timestamp of the last successful completion of a DB backup.",
}) })
completionTime.Set(float64(time.Now().Unix())) completionTime.SetToCurrentTime()
if err := push.Collectors( if err := push.Collectors(
"db_backup", push.HostnameGroupingKey(), "db_backup", push.HostnameGroupingKey(),
"http://pushgateway:9091", "http://pushgateway:9091",
@ -35,22 +34,3 @@ func ExampleCollectors() {
fmt.Println("Could not push completion time to Pushgateway:", err) fmt.Println("Could not push completion time to Pushgateway:", err)
} }
} }
func ExampleFromGatherer() {
registry := prometheus.NewRegistry()
completionTime := prometheus.NewGauge(prometheus.GaugeOpts{
Name: "db_backup_last_completion_timestamp_seconds",
Help: "The timestamp of the last successful completion of a DB backup.",
})
registry.MustRegister(completionTime)
completionTime.Set(float64(time.Now().Unix()))
if err := push.FromGatherer(
"db_backup", push.HostnameGroupingKey(),
"http://pushgateway:9091",
registry,
); err != nil {
fmt.Println("Could not push completion time to Pushgateway:", err)
}
}