From 6338c8aa999a1bec528a1d22f126c197812a14cf Mon Sep 17 00:00:00 2001 From: Mathias Petermann Date: Fri, 12 Nov 2021 12:03:52 +0100 Subject: [PATCH] Improve logging --- main.go | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/main.go b/main.go index c0a578a..69e41b7 100644 --- a/main.go +++ b/main.go @@ -4,12 +4,13 @@ import ( "encoding/json" "flag" "fmt" - "github.com/prometheus/client_golang/prometheus" - "github.com/prometheus/client_golang/prometheus/promhttp" "io/ioutil" "log" "net/http" "time" + + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promhttp" ) type switchReport struct { @@ -87,6 +88,8 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) { func (e *Exporter) FetchSwitchMetrics(switchIP string, ch chan<- prometheus.Metric) { + log.Printf("Trying to connect to switch at: %s\n", switchIP) + url := "http://" + switchIP + "/report" switchClient := http.Client{ @@ -104,6 +107,7 @@ func (e *Exporter) FetchSwitchMetrics(switchIP string, ch chan<- prometheus.Metr res, getErr := switchClient.Do(req) if getErr != nil { + fmt.Printf("Error while trying to connect to switch: %v\n", getErr) ch <- prometheus.MustNewConstMetric( up, prometheus.GaugeValue, 0, ) @@ -159,6 +163,10 @@ func main() { flag.Parse() + if *switchIP == "" { + log.Fatal("No switch.ip-address provided") + } + exporter := NewExporter(*switchIP) prometheus.MustRegister(exporter) @@ -172,5 +180,7 @@ func main() { `)) }) + + log.Printf("Starting listener on %s\n", *listenAddress) log.Fatal(http.ListenAndServe(*listenAddress, nil)) }