rhosp-director: Upgrade osp9->10->11 fails with Error: /Stage[main]/Neutron::Db::Sync/Exec[neutron-db-sync]:
Failed to call refresh: neutron-db-manage upgrade heads returned 1 instead of one of [0]
当你安装遇到这个问题，是因为你没有安装Neutron编译安装需要的python依赖包
依赖包：python-networking-bigswitch
安装方法： yum源安装
原文：https://www.cnblogs.com/dccrussell/p/9351165.html