feat: add fetch-interval option

README.md

@@ -24,10 +24,11 @@ Usage:
   jenkins-node-state-exporter [flags]
 
 Flags:
-  -a, --address string           address of the jenkins server (default "http://localhost/jenkins")
-      --disable-authentication   disable authentication
-  -h, --help                     help for jenkins-node-state-exporter
-  -p, --password string          password of the jenkins user account (default "admin")
-      --port int                 port to listen on (default 9723)
-  -u, --username string          username of the jenkins user account (default "admin")
+  -a, --address string            address of the jenkins server (default "http://localhost/jenkins")
+      --disable-authentication    disable authentication
+      --fetch-interval duration   fetch-interval in seconds (default 30s)
+  -h, --help                      help for jenkins-node-state-exporter
+  -p, --password string           password of the jenkins user account (default "admin")
+      --port int                  port to listen on (default 9827)
+  -u, --username string           username of the jenkins user account (default "admin")
 ```

cmd/root.go

@@ -17,13 +17,13 @@ package cmd
 
 import (
 	"fmt"
-	"github.com/spf13/cobra"
-	"log"
-	"os"
-
 	exporter "github.com/arsiesys/jenkins-node-state-exporter/pkg/exporter"
 	homedir "github.com/mitchellh/go-homedir"
+	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+	"log"
+	"os"
+	"time"
 )
 
 var cfgFile string
@@ -58,6 +58,10 @@ func init() {
 	if err := viper.BindPFlag("port", rootCmd.Flags().Lookup("port")); err != nil {
 		log.Fatal(err)
 	}
+	rootCmd.Flags().Duration("fetch-interval",30*time.Second,"fetch-interval in seconds")
+	if err := viper.BindPFlag("fetch-interval", rootCmd.Flags().Lookup("fetch-interval")); err != nil {
+		log.Fatal(err)
+	}
 	rootCmd.Flags().Bool("disable-authentication",false,"disable authentication")
 	if err := viper.BindPFlag("disable-authentication", rootCmd.Flags().Lookup("disable-authentication")); err != nil {
 		log.Fatal(err)
@@ -102,5 +106,6 @@ func initConfig() {
 	} else {
 		log.Printf("Using username: %s", viper.GetString("username"))
 	}
-	log.Printf("Listening on port :%d",viper.GetInt("port"))
+	log.Printf("Listening on port: %d",viper.GetInt("port"))
+	log.Printf("Parsing interval: %fs",viper.GetDuration("fetch-interval").Seconds())
 }

pkg/exporter/exporter.go

@@ -118,8 +118,7 @@ func promWatchJenkinsNodes(registry prometheus.Registry) {
 				delete(listOfKnownComputer, k)
 			}
 
-
-			time.Sleep(10 * time.Second)
+			time.Sleep(time.Duration(viper.GetDuration("fetch-interval")))
 		}
 	}()
 }