OpenStack之Neutron（网络服务）

控制器节点安装和配置网络服务
部署条件：在配置OpenStack连网（neutron）服务之前，必须创建数据库、服务凭据和API端点。
1、创建数据库
1）使用数据库访问客户端作为root连接到数据库服务器:
mysql -u root -p123

2）创建neutron数据库:
CREATE DATABASE neutron;

3）授予对neutron数据库的正确访问权限，用合适的密码：
GRANT ALL PRIVILEGES ON neutron.* TO ‘neutron’@’%’ IDENTIFIED BY ‘abc123’;
GRANT ALL PRIVILEGES ON neutron.* TO ‘neutron’@’%’ IDENTIFIED BY ‘abc123’;

4）刷新权限
FLUSH PRIVILEGES;

5）退出数据库
QUIT

2、创建服务凭据
1）来源的管理凭证，以获得访问只有管理CLI命令:
. admin-openrc

2）创建neutron用户，密码abc123:
openstack user create --domain default --password-prompt neutron

3）添加admin 角色到neutron 用户：
openstack role add --project service --user neutron admin

4）创建neutron服务实体：
openstack service create --name neutron
–description “OpenStack Networking” network

5）创建网络服务API端点：
openstack endpoint create --region RegionOne
network public http://controller:9696

openstack endpoint create --region RegionOne
network internal http://controller:9696

openstack endpoint create --region RegionOne
network admin http://controller:9696

3、安装并配置网络组件
1）安装组件
yum install openstack-neutron
openstack-neutron-ml2
openstack-neutron-linuxbridge
ebtables

2）配置服务组件。修改/etc/neutron/neutron.conf配置文件
cd /etc/neutron/
cp neutron.conf neutron.conf.bak
egrep -v “^$|#” neutron.conf.bak > neutron.conf

vi neutron.conf
配置数据库访问：
[database]
connection = mysql+pymysql://neutron:abc123@controller/neutron

启用ML2插件并禁用其他插件：
[DEFAULT]
core_plugin = ml2
service_plugins =

配置 “RabbitMQ” 消息队列的连接：
[DEFAULT]
transport_url = rabbit://openstack:abc123@controller

配置认证服务访问：
[DEFAULT]
auth_strategy = keystone

[keystone_authtoken]
auth_url = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = neutron
password = abc123

配置网络服务来通知计算节点的网络拓扑变化：
[DEFAULT]
notify_nova_on_port_status_changes = True
notify_nova_on_port_data_changes = True

[nova]
auth_url = http://controller:35357
auth_type = password
project_domain_name = Default
user_domain_name = Default
region_name = RegionOne
project_name = service
username = nova
password = abc123

[oslo_concurrency]
lock_path = /var/lib/neutron/tmp //配置锁定路径

保存退出

4、配置 Modular Layer 2 (ML2) 插件
ML2插件使用Linuxbridge机制来为实例创建layer－2虚拟网络基础设施

cp ml2_conf.ini ml2_conf.ini.bak
egrep -v “^$|#” ml2_conf.ini.bak > ml2_conf.ini

vi ml2_conf.ini
[ml2]
type_drivers = flat,vlan //启用flat和VLAN网络
tenant_network_types = //禁用私有网络
mechanism_drivers = linuxbridge //启用Linuxbridge机制
extension_drivers = port_security //启用端口安全扩展驱动

[ml2_type_flat]
flat_networks = provider //配置公共虚拟网络为flat网络

[securitygroup]
enable_ipset = True //启用 ipset 增加安全组规则的高效性

保存

5、配置linuxbridge代理
Linuxbridge代理为实例建立layer－2虚拟网络并且处理安全组规则。

cd /etc/neutron/plugins/ml2/
cp linuxbridge_agent.ini linuxbridge_agent.ini.bak
egrep -v “^$|#” linuxbridge_agent.ini.bak >linuxbridge_agent.ini
vi linuxbridge_agent.ini
[linux_bridge]
physical_interface_mappings = provider:ens34
//将公共虚拟网络和公共物理网络接口对应起来

[securitygroup] //启用安全组并配置Linux桥接iptables防火墙驱动
enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver

[vxlan]
enable_vxlan = False //禁止VXLAN覆盖网络

6、配置DHCP代理
cd /etc/neutron/
cp dhcp_agent.ini dhcp_agent.ini.bak
egrep -v “^$|#” dhcp_agent.ini.bak > dhcp_agent.ini

vi dhcp_agent.ini
配置Linuxbridge驱动接口，DHCP驱动并启用隔离元数据，这样在公共网络上的实例就可以通过网络来访问元数据
[DEFAULT]
interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver
dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
enable_isolated_metadata = True

7、配置元数据代理
metadata_agent元数据负责提供配置信息，例如：访问实例的凭证
编辑/etc/neutron/metadata_agent.ini 文件
cd /etc/neutron/
cp metadata_agent.ini metadata_agent.ini.bak
egrep -v “^ $|^#” metadata_agent.ini.bak > metadata_agent.ini

vi metadata_agent.ini
[DEFAULT]
nova_metadata_ip = controller //配置元数据主机
metadata_proxy_shared_secret = mate //配置元数据代理共享密码，自定义

8、为计算节点配置网络服务
1）编辑/etc/nova/nova.conf文件
cd /etc/nova/
cp nova.conf nova.conf.nova

vi nova.conf
[neutron] //配置网络服务模块及认证服务，启用元数据代理并设置密码
url = http://controller:9696
auth_url = http://controller:35357
auth_type = password
project_domain_name = Default
user_domain_name = Default
region_name = RegionOne
project_name = service
username = neutron
password = abc123
service_metadata_proxy = True
metadata_proxy_shared_secret = mate

2）网络服务初始化脚本需要一个超链接 /etc/neutron/plugin.ini指向ML2插件配置文件/etc/neutron/plugins/ml2/ml2_conf.ini
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

3）填充数据库:
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


4）重新启动Compute API服务:
systemctl restart openstack-nova-api.service

5）启动网络服务，并将其配置为在系统启动时启动。
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

6）对网络选项2，同样启用并启动layer-3服务：
systemctl enable neutron-l3-agent.service
systemctl start neutron-l3-agent.service

7）验证安装结果
neutron ext-list

openstack network agent list
neutron agent-list

———————以上都是控制节点中操作———————
网络服务neutron计算节点的安装及配置
1、安装组件
yum install openstack-neutron-linuxbridge ebtables ipset -y

2、配置通用组件
cd /etc/neutron/
cp neutron.conf neutron.conf.bak
egrep -v “^$|#” neutron.conf.bak > neutron.conf

vi neutron.conf
[DEFAULT]
transport_url = rabbit://openstack:abc123@controller //配置 “RabbitMQ” 消息队列的连接
auth_strategy = keystone //配置认证服务访问

[keystone_authtoken] //配置认证服务访问
auth_uri = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = neutron
password = abc123

[oslo_concurrency]
lock_path = /var/lib/neutron/tmp //配置锁路径

3、配置网络选项
选择与之前在控制节点上选择的相同的网络选项。

（1）配置Linuxbridge代理：
cd /etc/neutron/plugins/ml2/
cp linuxbridge_agent.ini linuxbridge_agent.ini.bak
egrep -v “^$|#” linuxbridge_agent.ini.bak >linuxbridge_agent.ini

vi linuxbridge_agent.ini
[linux_bridge] //将公共虚拟网络和公共物理网络接口对应起来
physical_interface_mappings = provider:ens34

[vxlan] //禁止VXLAN覆盖网络
enable_vxlan = False

[securitygroup] //启用安全组并配置Linuxbridge iptables firewalld driver
enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver

（2）为计算节点配置网络服务：
cd /etc/nova/
cp nova.conf nova.conf.nova
vi nova.conf

[neutron] //配置访问参数
auth_url = http://controller:9696
auth_url = http://controller:35357
auth_type = password
project_domain_name = Default
user_domain_name = Default
region_name = RegionOne
project_name = service
username = neutron
password = abc123

systemctl restart openstack-nova-compute.service
systemctl enable neutron-linuxbridge-agent.service
systemctl restart neutron-linuxbridge-agent.service

neutron agent-list