因為我的安裝是在我的一個物理機上，安裝這個openstack. 物理主機上無法訪問fuel web ui http://10.20.0.2:8443

My approach is as follows, so that I can browse the Fuel web UI http://192.168.0.12:8443 on the new VM with firefox browser.

1. I attached one more interface as adapter 4 on FuelMaster node, and note: the interface is 'internal network' adapter, not host-only adapter. after installation completes,

I modified the interface in /etc/sysconfig/network-scripts/ifc-eth3 to 'static', such as

TYPE=Ethernet
BOOTPROTO=static
IPADDR=192.168.0.12
NETMASK=255.255.255.0
NM_CONTROLLED=no
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=eth3
UUID=200de1be-cba3-43a9-babd-d7eb0448c6e4
DEVICE=eth3

2. Create new VM with web browser, which need to attach a 'internal network' adapter. and after installation complete,

we still need to modify its interface to a 'static', ensure the 2 interfaces are in same sub net. (note: the red highlighted items are added by me. )

TYPE=Ethernet
BOOTPROTO=static
IPADDR=192.168.0.13
NETMASK=255.255.255.0
NM_CONTROLLED=no