fuel验证网络正确性时，报错如下：
Repo availability verification using public network failed on following nodes Untitled (99:1b).
Following repos are not available - http://archive.ubuntu.com/ubuntu/, http://mirror.fuel-infra.org/mos-repos/ubuntu//.
Check your public network settings and availability of the repositories from public network. Please examine nailgun and astute logs for additional details.
原因分析：
在fuel_master上没有运行
fuel-createmirror
创建本地源（针对fuel9而言，反正我之前使用fuel11是无法运行这一行命令。谷歌了下好像是fuel10以后不支持这条命令），就直接开始新建openstack环境，导致设置中的Repositories使用的网络链接，而不是本地的源
解决方案：
进入设置-基础配置-Repositories，看看你的配置是不是如下图：
将其修改为如下：
deb http://10.20.0.2:8080/mirrors/ubuntu trusty main multiverse restricted universe
deb http://10.20.0.2:8080/mirrors/ubuntu trusty-updates main multiverse restricted universe
deb http://10.20.0.2:8080/mirrors/ubuntu trusty-security main multiverse restricted universe
deb http://10.20.0.2:8080/mirrors/mos-repos/ubuntu/9.0 mos9.0 main restricted
deb http://10.20.0.2:8080/mirrors/mos-repos/ubuntu/9.0 mos9.0-updates main restricted
deb http://10.20.0.2:8080/mirrors/mos-repos/ubuntu/9.0 mos9.0-security main restricted
deb http://10.20.0.2:8080/mirrors/mos-repos/ubuntu/9.0 mos9.0-holdback main restricted
deb http://10.20.0.2:8080/mitaka-9.0/ubuntu/auxiliary auxiliary main restricted
然后重新检验网络正确性，正确。