创建neutron用户：
mysql -u root -p

CREATE DATABASE neutron;
GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'localhost' IDENTIFIED BY '123456';
GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'%' IDENTIFIED BY '123456';
exit

创建用户、服务、endpoint：
keystone user-create --name neutron --pass 123456
keystone user-role-add --user neutron --tenant service --role admin
keystone service-create --name neutron --type network --description "OpenStack Networking"
keystone endpoint-create \
  --service-id $(keystone service-list | awk '/ network / {print $2}') \
  --publicurl http://myvip:9696 \
  --adminurl http://myvip:9696 \
  --internalurl http://myvip:9696

在每个控制节点安装：
yum install -y openstack-neutron openstack-neutron-ml2 python-neutronclient which

在每个控制节点修改配置文件：
openstack-config --set /etc/neutron/neutron.conf database connection mysql://neutron:123456@myvip/neutron
openstack-config --set /etc/neutron/neutron.conf DEFAULT rpc_backend rabbit
openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_password 123456
openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_hosts controller1:5672,controller2:5672,controller3:5672
openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_retry_interval 1
openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_retry_backoff 2
openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_max_retries 0
openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_durable_queues true
openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_ha_queues true
openstack-config --set /etc/neutron/neutron.conf DEFAULT auth_strategy keystone
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken auth_uri http://myvip:5000/v2.0
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken identity_uri http://myvip:35357
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken admin_user neutron
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken admin_tenant_name service
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken admin_password 123456
openstack-config --set /etc/neutron/neutron.conf DEFAULT core_plugin ml2
openstack-config --set /etc/neutron/neutron.conf DEFAULT service_plugins router
openstack-config --set /etc/neutron/neutron.conf DEFAULT allow_overlapping_ips True
openstack-config --set /etc/neutron/neutron.conf DEFAULT notify_nova_on_port_status_changes True
openstack-config --set /etc/neutron/neutron.conf DEFAULT notify_nova_on_port_data_changes True
openstack-config --set /etc/neutron/neutron.conf DEFAULT nova_url http://myvip:8774/v2
openstack-config --set /etc/neutron/neutron.conf DEFAULT nova_admin_auth_url http://myvip:35357/v2.0
openstack-config --set /etc/neutron/neutron.conf DEFAULT nova_region_name regionOne
openstack-config --set /etc/neutron/neutron.conf DEFAULT nova_admin_username nova
openstack-config --set /etc/neutron/neutron.conf DEFAULT nova_admin_tenant_id 1f6dea174a2d4a2985c5b7a24c9e9aae
openstack-config --set /etc/neutron/neutron.conf DEFAULT nova_admin_password 123456
openstack-config --set /etc/neutron/neutron.conf DEFAULT verbose True

openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 type_drivers flat,gre
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 tenant_network_types gre
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 mechanism_drivers openvswitch
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2_type_gre tunnel_id_ranges 1:1000
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini securitygroup enable_security_group True
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini securitygroup enable_ipset True
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini securitygroup neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver

openstack-config --set /etc/nova/nova.conf DEFAULT network_api_class nova.network.neutronv2.api.API
openstack-config --set /etc/nova/nova.conf DEFAULT security_group_api neutron
openstack-config --set /etc/nova/nova.conf DEFAULT linuxnet_interface_driver nova.network.linux_net.LinuxOVSInterfaceDriver
openstack-config --set /etc/nova/nova.conf DEFAULT firewall_driver nova.virt.firewall.NoopFirewallDriver
openstack-config --set /etc/nova/nova.conf neutron url http://myvip:9696
openstack-config --set /etc/nova/nova.conf neutron auth_strategy keystone
openstack-config --set /etc/nova/nova.conf neutron admin_auth_url http://myvip:35357/v2.0
openstack-config --set /etc/nova/nova.conf neutron admin_tenant_name service
openstack-config --set /etc/nova/nova.conf neutron admin_username neutron
openstack-config --set /etc/nova/nova.conf neutron admin_password 123456

初始化数据库：
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini
su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade juno" neutron

启动相关服务：
systemctl restart openstack-nova-api.service openstack-nova-scheduler.service openstack-nova-conductor.service
systemctl enable neutron-server.service
systemctl start neutron-server.service