OpenStack网络(neutron)允许您创建并将其他OpenStack服务管理的接口设备附加到网络上。可以实现插件来适应不同的网络设备和软件，从而为OpenStack体系结构和部署提供灵活性。
它包括以下组成部分:
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Messaging queue
大多数OpenStack网络安装都使用它在neutron-server和各种代理之间路由信息。还充当数据库，存储特定插件的网络状态。
Before you configure the OpenStack Networking (neutron) service, you must create a database, service credentials, and API endpoints.
○ Use the database access client to connect to the database server as the root user:
$ MySQL -u root -p root123
○ Create the neutron database:
MariaDB [keystone]> CREATE DATABASE neutron;
○ Grant proper access to the neutron database, replacing NEUTRON_DBPASS with a suitable password:
MariaDB [keystone]> GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'%' IDENTIFIED BY 'neutron123';$ . admin-openrcTo create the service credentials, complete these steps:
○ Create the neutron user:
$ openstack user create --domain default --password-prompt neutron
User Password:neutron123
Repeat User Password:neutron123
+---------------------+----------------------------------+
| Field | Value |
+---------------------+----------------------------------+
| domain_id | default |
| enabled | True |
| id | fdb0f541e28141719b6a43c8944bf1fb |
| name | neutron |
| options | {} |
| password_expires_at | None |
+---------------------+----------------------------------+
○ Add the admin role to the neutron user:
$ openstack role add --project service --user neutron admin
Note: This command provides no output.
○ Create the neutron service entity:
$ openstack service create --name neutron --description "OpenStack Networking" network
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | OpenStack Networking |
| enabled | True |
| id | f71529314dab4a4d8eca427e701d209e |
| name | neutron |
| type | network |
+-------------+----------------------------------+
#openstack endpoint create --region RegionOne network public http://stack.flex.net:9696
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 85d80a6d02fc4b7683f611d7fc1493a3 |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | f71529314dab4a4d8eca427e701d209e |
| service_name | neutron |
| service_type | network |
| url | http://stack.flex.net:9696 |
+--------------+----------------------------------+#openstack endpoint create --region RegionOne network internal http://stack.flex.net:9696
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 09753b537ac74422a68d2d791cf3714f |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | f71529314dab4a4d8eca427e701d209e |
| service_name | neutron |
| service_type | network |
| url | http://stack.flex.net:9696 |
+--------------+----------------------------------+
#openstack endpoint create --region RegionOne network admin http://stack.flex.net:9696
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | 1ee14289c9374dffb5db92a5c112fc4e |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | f71529314dab4a4d8eca427e701d209e |
| service_name | neutron |
| service_type | network |
| url | http://stack.flex.net:9696 |
+--------------+----------------------------------+
#### Configure networking options可以使用选项1和选项2表示的两种体系结构中的一种部署网络服务。
选项1部署了最简单的体系结构，它只支持将实例附加到provider(external)网络。没有self-service(private)网络、路由器或浮动IP地址。只有管理员或其他特权用户才能管理provider网络。
选项2支持将实例附加到自助服务网络的3层服务来增强选项1。demo或其他无特权用户可以管理自助服务网络，包括在自助服务网络和提供者网络之间提供连接的路由器。此外，浮动IP地址使用来自外部网络(如Internet)的自助服务网络提供到实例的连接。
自服务网络通常使用overlay网络。overlay网络协议如vxlan包括额外的头部信息，这些头文件增加了开销，减少了有效负载或用户数据可用的空间。在不了解虚拟网络基础设施的情况下，实例尝试使用默认的1500字节以太网最大传输单元(MTU)发送数据包。网络服务通过DHCP自动向实例提供正确的MTU值。但是，有些云镜像不使用DHCP或忽略DHCP MTU选项，需要使用元数据或脚本进行配置。
选择下列网络选项中的一个，或两个全选，参看下面的两个章节。并返回这里再向下继续配置
○ Networking Option 1: Provider networks
○ Networking Option 2: Self-service networks
The metadata agent provides configuration information such as credentials to instances.
Edit the /etc/neutron/metadata_agent.ini file and complete the following actions:
○ In the [DEFAULT] section, configure the metadata host and shared secret:
[DEFAULT]
# ...
nova_metadata_host = stack.flex.net
metadata_proxy_shared_secret = 1234
Replace METADATA_SECRET with a suitable secret for the metadata proxy.Note: The Nova compute service must be installed to complete this step.
Edit the /etc/nova/nova.conf file and perform the following actions:
○ In the [neutron] section, configure access parameters, enable the metadata proxy, and configure the secret:
[neutron]
# ...
url = http://stack.flex.net:9696
auth_url = http://stack.flex.net:5000
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = neutron
password = neutron123
service_metadata_proxy = true
metadata_proxy_shared_secret = 1234# 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 head" neutron
注意：由于脚本需要完整的服务器和插件配置文件，数据库填充将在稍后用于网络。 # systemctl restart openstack-nova-api.serviceFor both networking options:
# 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
For networking option 2, also enable and start the layer-3 service:
# systemctl enable neutron-l3-agent.service
# systemctl start neutron-l3-agent.service
