启动hub主机：

java -jar selenium-server-standalone-2.39.0.jar -role hub

启动node

本地：java -jar selenium-server-standalone-2.39.0.jar -role node -port 5555

远程：java -jar selenium-server-standalone-2.39.0.jar -role node -port 5555 -hub http://hub主机ip/grid/register

selenium-server 启动命令