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Signed-off-by: Arthur Silva Sens <arthur.sens@coralogix.com>
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| // Copyright 2022 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. | ||
|
|
||
| // A simple example of how to exposed created timestamps in OpenMetrics format. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "log" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/client_golang/prometheus/collectors" | ||
| "github.com/prometheus/client_golang/prometheus/promhttp" | ||
| ) | ||
|
|
||
| func main() { | ||
| requestDurations := prometheus.NewHistogram(prometheus.HistogramOpts{ | ||
| Name: "http_request_duration_seconds", | ||
| Help: "A histogram of the HTTP request durations in seconds.", | ||
| Buckets: prometheus.ExponentialBuckets(0.1, 1.5, 5), | ||
| }) | ||
|
|
||
| // Create non-global registry. | ||
| registry := prometheus.NewRegistry() | ||
|
|
||
| // Add go runtime metrics and process collectors. | ||
| registry.MustRegister( | ||
| collectors.NewGoCollector(), | ||
| collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}), | ||
| requestDurations, | ||
| ) | ||
|
|
||
| go func() { | ||
| for { | ||
| // Record fictional latency. | ||
| now := time.Now() | ||
| requestDurations.Observe( | ||
| time.Since(now).Seconds(), | ||
| ) | ||
| time.Sleep(600 * time.Millisecond) | ||
| } | ||
| }() | ||
|
|
||
| // Expose /metrics HTTP endpoint using the created custom registry. | ||
| http.Handle( | ||
| "/metrics", promhttp.HandlerFor( | ||
| registry, | ||
| promhttp.HandlerOpts{ | ||
| EnableOpenMetrics: true, | ||
| EnableOpenMetricsCreatedLines: true, | ||
| }), | ||
| ) | ||
| // To test: curl -H 'Accept: application/openmetrics-text' localhost:8080/metrics | ||
| log.Fatalln(http.ListenAndServe(":8081", nil)) | ||
| } |
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