start 3 driver in the same node, but controller just show one driver

[dwj192]

./start-driver.sh 3

start 3 driver in same node: http://172.16.30.108:18288/driver/ http://172.16.30.108:18188/driver/ http://172.16.30.108:18088/driver/

edit conf/controller.conf

[driver1]
name = driver1
url = http://172.16.30.108:18088/driver

[driver2]
name = driver2
url = http://172.16.30.108:18188/driver

[driver3]
name = driver3
url = http://172.16.30.108:18288/driver

start controller

./start-controller.sh

but in this address, i can see driver only one: http://172.16.30.108:19088/controller/index.html

1   driver1 http://172.16.30.108:18088/driver   view details

how can i show multiple ub controller? thank you!