安装ovs
yum install -y epel-release centos-release-openstack-train openvswitch
systemctl start openvswitch
systemctl enable openvswitch
ovs-ctl start安装ovn
yum install -y ovn-central ovn-common ovn-host
ovn-ctl start_northd
ovn-ctl start_controller标签：ovs,openvswitch,start,yum,ctl,ovn From： https://www.cnblogs.com/WJQ2017/p/17539335.html