added dial time out

aws-experiment-launch/experiment/commander/main.go

@@ -119,7 +119,7 @@ func dictateNodes(command string) {
 
 func dictateNode(addr string, command string) {
 	// creates client
-	conn, err := net.Dial("tcp", addr)
+	conn, err := net.DialTimeout("tcp", addr, 5*time.Second)
 	if err != nil {
 		log.Println(err)
 		return

aws-experiment-launch/spot-instance/userdata.sh

@@ -9,8 +9,7 @@ curl http://$commanderIP:8080/txgen -o txgen
 chmod +x ./txgen
 
 # Get My IP
-wget http://169.254.169.254/latest/meta-data/public-ipv4
-ip=$(head -n 1 public-ipv4)
+ip=`curl http://169.254.169.254/latest/meta-data/public-ipv4`
 
 node_port=9000
 soldier_port=1$node_port