在centos 7.1下安装devstack时，执行到下面的步骤时报错
2015-12-11 17:07:57.779 | + ADD_DEFAULT_ROUTE=‘sudo ip -f inet r replace default via 192.168.141.2 dev br-ex‘
2015-12-11 17:07:57.779 | + [[ True == \T\r\u\e ]]
2015-12-11 17:07:57.779 | + ADD_OVS_PORT=‘sudo ovs-vsctl --may-exist add-port br-ex eno33554976‘
2015-12-11 17:07:57.779 | + [[ 192.168.141.128/24 brd 192.168.141.255 != ‘‘ ]]
2015-12-11 17:07:57.779 | + IP_DEL=‘sudo ip addr del 192.168.141.128/24 brd 192.168.141.255 dev eno33554976‘
2015-12-11 17:07:57.779 | + IP_ADD=‘sudo ip addr add 192.168.141.128/24 brd 192.168.141.255 dev br-ex‘
2015-12-11 17:07:57.779 | + sudo ip addr del 192.168.141.128/24 brd 192.168.141.255 dev eno33554976
2015-12-11 17:07:57.787 | + sudo ip addr add 192.168.141.128/24 brd 192.168.141.255 dev br-ex
2015-12-11 17:07:57.793 | + sudo ovs-vsctl --may-exist add-port br-ex eno33554976
2015-12-11 17:07:57.814 | + sudo ip -f inet r replace default via 192.168.141.2 dev br-ex
2015-12-11 17:07:57.821 | RTNETLINK answers: Network is unreachable
单独执行该命令，还是报错
[[email protected] ~]# sudo ip -f inet r replace default via 192.168.141.2 dev br-ex
RTNETLINK answers: Network is unreachable
查看端口状态，发现br-ex 的状态为down，然后手动up该端口后，命令执行成功
[[email protected] ~]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:a0:aa:48 brd ff:ff:ff:ff:ff:ff
inet 10.0.0.150/24 brd 10.0.0.255 scope global eno16777736
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fea0:aa48/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: eno33554976: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP qlen 1000
link/ether 00:0c:29:a0:aa:52 brd ff:ff:ff:ff:ff:ff
inet6 fe80::20c:29ff:fea0:aa52/64 scope link
valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 52:54:00:f7:2f:e3 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
5: virbr0-nic: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 500
link/ether 52:54:00:f7:2f:e3 brd ff:ff:ff:ff:ff:ff
6: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
link/ether 12:58:4a:8b:b3:5e brd ff:ff:ff:ff:ff:ff
11: br-int: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
link/ether ae:bd:72:fa:c0:4a brd ff:ff:ff:ff:ff:ff
12: br-ex: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
link/ether 00:0c:29:a0:aa:52 brd ff:ff:ff:ff:ff:ff
inet 192.168.141.128/24 brd 192.168.141.255 scope global br-ex
valid_lft forever preferred_lft forever
[[email protected] ~]# ifconfig br-ex up
[[email protected] devstack]$ sudo ip -f inet r replace default via 192.168.141.2 dev br-ex
将ifconfig命令加入到脚本文件中
[[email protected] ~]# cd /home/stack/devstack/
[[email protected] devstack]# find ./ -type f |xargs grep "ip -f inet r replace default via"
[[email protected] devstack]# find ./ -type f |xargs grep "ADD_DEFAULT_ROUTE"
./lib/neutron-legacy: ADD_DEFAULT_ROUTE="sudo ip -f $af r replace default via $DEFAULT_ROUTE_GW dev $to_intf"
./lib/neutron-legacy: $IP_DEL; $IP_ADD; $ADD_OVS_PORT; $ADD_DEFAULT_ROUTE