启动三个节点
RABBITMQ_NODE_PORT=5672 RABBITMQ_NODENAME=rabbit ./sbin/rabbitmq-server -detached
RABBITMQ_NODE_PORT=5673 RABBITMQ_NODENAME=rabbit_1 ./sbin/rabbitmq-server -detached
RABBITMQ_NODE_PORT=5674 RABBITMQ_NODENAME=rabbit_2 ./sbin/rabbitmq-server -de