openstack devstack RTNETLINK answers: Network is unreachable

最新推荐文章于 2023-02-20 09:50:37 发布

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最新推荐文章于 2023-02-20 09:50:37 发布

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原文链接：http://blog.51cto.com/zhoulibo/1721998

在CentOS 7.1上安装DevStack过程中遇到`Network is unreachable`错误，通过检查网络配置和端口状态，发现br-ex接口处于down状态。手动将其设为up后，问题解决。本文档记录了安装过程中的这个问题及其解决方案。

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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
[root@localhost ~]# 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
[root@localhost ~]# ip addr show