60 lines
1.9 KiB
Markdown
60 lines
1.9 KiB
Markdown
[](http://godoc.org/github.com/VictoriaMetrics/metrics)
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[](https://goreportcard.com/report/github.com/VictoriaMetrics/metrics)
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# metrics - lightweight package for exporting metrics in Prometheus format
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### Features
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* Lightweight. Has minimal number of third-party dependencies and all these deps are small.
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See [this article](https://medium.com/@valyala/stripping-dependency-bloat-in-victoriametrics-docker-image-983fb5912b0d) for details.
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* Easy to use. See the [API docs](http://godoc.org/github.com/VictoriaMetrics/metrics).
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* Fast.
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### Limitations
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* It doesn't implement advanced functionality from [github.com/prometheus/client_golang/prometheus](https://godoc.org/github.com/prometheus/client_golang/prometheus).
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### Usage
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```go
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import "github.com/VictoriaMetrics/metrics"
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// ...
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var (
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requestsTotal = metrics.NewCounter("requests_total")
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requestDuration = metrics.NewSummary(`requests_duration_seconds{handler="/my/super/handler"}`)
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)
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func init() {
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metrics.NewGauge(`queue_size{queue="foobar",topic="baz"}`, func() float64 {
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return float64(foobarQueue.Len())
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})
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}
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// ...
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func requestHandler() {
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startTime := time.Now()
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// ...
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requestsTotal.Inc()
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requestDuration.UpdateDuration(startTime)
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}
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// ...
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// Register `/metrics` handler for exposing the registered metrics.
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http.HandleFunc("/metrics", func(w http.ResponseWriter, req *http.Request) {
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metrics.WritePrometheus(w, true)
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})
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```
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See [docs](http://godoc.org/github.com/VictoriaMetrics/metrics) for more info.
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### Users
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* `Metrics` has been extracted from [VictoriaMetrics](https://github.com/VictoriaMetrics/VictoriaMetrics) sources.
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See [this article](https://medium.com/devopslinks/victoriametrics-creating-the-best-remote-storage-for-prometheus-5d92d66787ac)
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for more info about `VictoriaMetrics`.
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