closing test tcp connections

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Changelog
 ## Unreleased
 
+## [0.0.3] 2019-09-06
+### Added
+- the tcp connections for testing the connection to the xmpp server are now closed
+
 ## [0.0.2] 2019-09-05
 ### Added
 - the prom exporter now watches the tcp conn to the xmpp server (this led to some confusion on k8s), if the connection to the xmpp server is lost, the exporter exits 

exporter/main.go

@@ -128,10 +128,15 @@ func main() {
 	go func() {
 		address := xmppServer + ":" + xmppPort
 		for true {
-			_, err := net.DialTimeout("tcp", address, 5*time.Second)
+			conn, err := net.DialTimeout("tcp", address, 5*time.Second)
 			if err != nil {
 				fmt.Printf("Could not connect to server %s: %s\nexiting\n", address, err.Error())
 				signals <- iExit
+				return
+			}
+
+			if tcpconn, ok := conn.(*net.TCPConn); ok {
+				_ = tcpconn.Close()
 			}
 			time.Sleep(10 * time.Second)
 		}