7ced8464e0
Add dependency on the prometheus library to start exporting metrics. Add a new `up` metric that always returns `1` to ensure the exporter is working as expected.
39 lines
758 B
Go
39 lines
758 B
Go
package main
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import (
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"log"
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"net/http"
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)
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const namespace = "fail2ban"
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var up = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "", "up"),
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"Was the last fail2ban query successful.",
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nil, nil,
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)
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type Exporter struct {
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}
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func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
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ch <- up
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}
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func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
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ch <- prometheus.MustNewConstMetric(
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up, prometheus.GaugeValue, 1,
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)
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}
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func main() {
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log.Print("starting fail2ban exporter")
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exporter := &Exporter{}
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prometheus.MustRegister(exporter)
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http.Handle("/metrics", promhttp.Handler())
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log.Fatal(http.ListenAndServe(":9101", nil))
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}
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