1. 创建neutron数据库并授权
[root@controller ~]# mysql -u root -proot
MariaDB [(none)]> CREATE DATABASE neutron;
Query OK, 1 row affected (0.000 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'localhost' IDENTIFIED BY 'NEUTRON_DBPASS';
Query OK, 0 rows affected (0.001 sec)
MariaDB [(none)]> GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'%' IDENTIFIED BY 'NEUTRON_DBPASS';
Query OK, 0 rows affected (0.000 sec)
2. 创建neutron用户
[root@controller ~]# openstack user create --domain default --password NEUTRON_PASS neutron
+---------------------+----------------------------------+
| Field | Value |
+---------------------+----------------------------------+
| domain_id | default |
| enabled | True |
| id | 53701656df754e03a7971010f81eb3da |
| name | neutron |
| options | {} |
| password_expires_at | None |
+---------------------+----------------------------------+
3. 向neutron用户添加admin角色
[root@controller ~]# openstack role add --project service --user neutron admin
4. 创建neutron服务实体
[root@controller ~]# openstack service create --name neutron --description "OpenStack Networking" network
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Networking |
| enabled | True |
| id | 533f64aabf8240a3965ffd196579a060 |
| name | neutron |
| type | network |
+-------------+----------------------------------+
5. 创建neutron服务端点
[root@controller ~]# openstack endpoint create --region RegionOne network public http://controller:9696
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 50645eaf294b4b649ee324c4250b40b8 |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 533f64aabf8240a3965ffd196579a060 |
| service_name | neutron |
| service_type | network |
| url | http://controller:9696 |
+--------------+----------------------------------+
[root@controller ~]# openstack endpoint create --region RegionOne network internal http://controller:9696
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | eb1194025aee4581bd428a138288f93d |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 533f64aabf8240a3965ffd196579a060 |
| service_name | neutron |
| service_type | network |
| url | http://controller:9696 |
+--------------+----------------------------------+
[root@controller ~]# openstack endpoint create --region RegionOne network admin http://controller:9696
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 41708d9ae7704b008d404c641f39d4c6 |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 533f64aabf8240a3965ffd196579a060 |
| service_name | neutron |
| service_type | network |
| url | http://controller:9696 |
+--------------+----------------------------------+
6. 安装软件包{配置二层网络}
[root@controller ~]# yum install openstack-neutron openstack-neutron-ml2 openstack-neutron-linuxbridge ebtables -y
说明：
openstack-neutron：neutron-server的包
openstack-neutron-ml2：ML2 plugin的包
openstack-neutron-linuxbridge：linux bridge network provider相关的包
ebtables：防火墙相关的包
7. 修改 neutron 配置文件
（1）neutron server的配置文件neutron.conf
[root@controller ~]# cp -a /etc/neutron/neutron.conf{,.bak}
[root@controller ~]# grep -Ev '^$|#' /etc/neutron/neutron.conf.bak > /etc/neutron/neutron.conf
openstack-config --set /etc/neutron/neutron.conf database connection mysql+pymysql://neutron:NEUTRON_DBPASS@controller/neutron
openstack-config --set /etc/neutron/neutron.conf DEFAULT core_plugin ml2
openstack-config --set /etc/neutron/neutron.conf DEFAULT service_plugins
openstack-config --set /etc/neutron/neutron.conf DEFAULT transport_url rabbit://openstack:RABBIT_PASS@controller
openstack-config --set /etc/neutron/neutron.conf DEFAULT auth_strategy keystone
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 keystone_authtoken www_authenticate_uri http://controller:5000
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken auth_url http://controller:5000
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken memcached_servers controller:11211
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken auth_type password
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken project_domain_name default
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken user_domain_name default
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken project_name service
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken username neutron
openstack-config --set /etc/neutron/neutron.conf keystone_authtoken password NEUTRON_PASS
openstack-config --set /etc/neutron/neutron.conf oslo_concurrency lock_path /var/lib/neutron/tmp
[root@controller ~]# vim /etc/neutron/neutron.conf
[nova]（[nova]自己加，加8行）
auth_url = http://ct:5000
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = nova
password = NOVA_PASS
（2）ML2 plugin的配置文件ml2_conf.ini
[root@controller ~]# cp -a /etc/neutron/plugins/ml2/ml2_conf.ini{,.bak}
[root@controller ~]# grep -Ev '^$|#' /etc/neutron/plugins/ml2/ml2_conf.ini.bak > /etc/neutron/plugins/ml2/ml2_conf.ini
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 type_drivers flat,vlan
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 tenant_network_types
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 mechanism_drivers linuxbridge
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 extension_drivers port_security
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2_type_flat flat_networks provider
openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini securitygroup enable_ipset true
（3）linux bridge network provider的配置文件linuxbridge_agent.ini
[root@controller ~]# cp -a /etc/neutron/plugins/ml2/linuxbridge_agent.ini{,.bak}
[root@controller ~]# grep -Ev '^$|#' /etc/neutron/plugins/ml2/linuxbridge_agent.ini.bak > /etc/neutron/plugins/ml2/linuxbridge_agent.ini
openstack-config --set /etc/neutron/plugins/ml2/linuxbridge_agent.ini linux_bridge physical_interface_mappings provider:eth0
openstack-config --set /etc/neutron/plugins/ml2/linuxbridge_agent.ini vxlan enable_vxlan false
openstack-config --set /etc/neutron/plugins/ml2/linuxbridge_agent.ini securitygroup enable_security_group true
openstack-config --set /etc/neutron/plugins/ml2/linuxbridge_agent.ini securitygroup firewall_driver neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
从配置文件中可以看出，INTERFACE_NAME指的是eth0，就是连接外部网络的那块网卡（provider interface）
8. 修改内核参数
[root@controller ~]# echo 'net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-ip6tables=1' >> /etc/sysctl.conf
[root@controller ~]# modprobe br_netfilter
[root@controller ~]# sysctl -p
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
9. dhcp agent配置文件dhcp_agent.ini
[root@controller ~]# cp -a /etc/neutron/dhcp_agent.ini{,.bak}
[root@controller ~]# grep -Ev '^$|#' /etc/neutron/dhcp_agent.ini.bak > /etc/neutron/dhcp_agent.ini
openstack-config --set /etc/neutron/dhcp_agent.ini DEFAULT interface_driver linuxbridge
openstack-config --set /etc/neutron/dhcp_agent.ini DEFAULT dhcp_driver neutron.agent.linux.dhcp.Dnsmasq
openstack-config --set /etc/neutron/dhcp_agent.ini DEFAULT enable_isolated_metadata true
10. 配置元数据代理，以便和nova通讯
[root@controller ~]# cp -a /etc/neutron/metadata_agent.ini{,.bak}
[root@controller ~]# grep -Ev '^$|#' /etc/neutron/metadata_agent.ini.bak > /etc/neutron/metadata_agent.ini
openstack-config --set /etc/neutron/metadata_agent.ini DEFAULT nova_metadata_host controller
openstack-config --set /etc/neutron/metadata_agent.ini DEFAULT metadata_proxy_shared_secret METADATA_SECRET
11. 修改nova的配置文件，也是为了和neutron进行交互
openstack-config --set /etc/nova/nova.conf neutron url http://controller:9696
openstack-config --set /etc/nova/nova.conf neutron auth_url http://controller:5000
openstack-config --set /etc/nova/nova.conf neutron auth_type password
openstack-config --set /etc/nova/nova.conf neutron project_domain_name default
openstack-config --set /etc/nova/nova.conf neutron user_domain_name default
openstack-config --set /etc/nova/nova.conf neutron region_name RegionOne
openstack-config --set /etc/nova/nova.conf neutron project_name service
openstack-config --set /etc/nova/nova.conf neutron username neutron
openstack-config --set /etc/nova/nova.conf neutron password NEUTRON_PASS
openstack-config --set /etc/nova/nova.conf neutron service_metadata_proxy true
openstack-config --set /etc/nova/nova.conf neutron metadata_proxy_shared_secret METADATA_SECRET
12. 初始数据库
建立ml2的软连接
[root@controller ~]# ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini
填充Neutron数据库
[root@controller ~]# su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade head" neutron
13. 重新启动nova-api服务
systemctl restart openstack-nova-api.service
14. 启动neutron服务和配置开机启动
systemctl enable neutron-server.service
neutron-linuxbridge-agent.service neutron-dhcp-agent.service
neutron-metadata-agent.service
systemctl start neutron-server.service
neutron-linuxbridge-agent.service neutron-dhcp-agent.service
neutron-metadata-agent.service
启动好之后，可以使用systemctl status命令查看各个服务运行的状态，使用netstat -tnlup查看是否有9696端口。
[root@controller ~]# netstat -lntup|grep 9696
tcp 0 0 0.0.0.0:9696 0.0.0.0:* LISTEN 11930/server.log
至此，控制节点上的neutron服务组件安装完毕，下面切换到另外一台机器，在计算节点上安装neutron服务。