test: ipam integration tests use grpc client

.gitignore

@@ -36,6 +36,7 @@ token
 
 # test generated files
 coverage*
+*.report
 
 # example kubeconfig generates by examples
 liqo_kubeconf*
@@ -50,6 +51,3 @@ docs/_build
 /tmp
 /graphviz
 /k3s-ansible
-
-# Ginkgo generated files
-*.report

cmd/ipam/main.go

@@ -162,7 +162,7 @@ func run(cmd *cobra.Command, _ []string) error {
 	// Register IPAM service
 	ipam.RegisterIPAMServer(server, liqoIPAM)
 
-	if err := server.Serve(lis); err != nil {
+	if err := server.Serve(lis); err != nil { // we do not need to close the listener as Serve will close it when returning
 		klog.Errorf("failed to serve: %v", err)
 		return err
 	}