14.2. 使用 Stateful DHCPv6 创建 IPv6 子网

流程

1. 检索您要创建 IPv6 子网的项目的项目 ID。这些值在 OpenStack 部署之间是唯一的，因此您的值与本例中的值不同。

   # openstack project list
   +----------------------------------+----------+
   | ID                               | Name     |
   +----------------------------------+----------+
   | 25837c567ed5458fbb441d39862e1399 |    QA    |
   | f59f631a77264a8eb0defc898cb836af |  admin   |
   | 4e2e1951e70643b5af7ed52f3ff36539 |   demo   |
   | 8561dff8310e4cd8be4b6fd03dc8acf5 | services |
   +----------------------------------+----------+

   Copy to Clipboard Toggle word wrap

2. 检索 OpenStack Networking (neutron)中存在的所有网络列表，并记下您要托管 IPv6 子网的网络名称：

   # openstack network list
   +--------------------------------------+------------------+-------------------------------------------------------------+
   | id                                   | name             | subnets                                                     |
   +--------------------------------------+------------------+-------------------------------------------------------------+
   | 8357062a-0dc2-4146-8a7f-d2575165e363 | private          | c17f74c4-db41-4538-af40-48670069af70 10.0.0.0/24            |
   | 31d61f7d-287e-4ada-ac29-ed7017a54542 | public           | 303ced03-6019-4e79-a21c-1942a460b920 172.24.4.224/28        |
   | 6aff6826-4278-4a35-b74d-b0ca0cbba340 | database-servers |                                                             |
   +--------------------------------------+------------------+-------------------------------------------------------------+

   Copy to Clipboard Toggle word wrap

3. 在 openstack subnet create 命令中包含项目 ID、网络名称和 ipv6 地址模式：

   # openstack subnet create --ip-version 6 --ipv6-address-mode dhcpv6-stateful --project 25837c567ed5458fbb441d39862e1399 --network database-servers --subnet-range fdf8:f53b:82e4::53/125 subnet_name
   
   Created a new subnet:
   +-------------------+--------------------------------------------------------------+
   | Field             | Value                                                        |
   +-------------------+--------------------------------------------------------------+
   | allocation_pools  | {"start": "fdf8:f53b:82e4::52", "end": "fdf8:f53b:82e4::56"} |
   | cidr              | fdf8:f53b:82e4::53/125                                       |
   | dns_nameservers   |                                                              |
   | enable_dhcp       | True                                                         |
   | gateway_ip        | fdf8:f53b:82e4::51                                           |
   | host_routes       |                                                              |
   | id                | cdfc3398-997b-46eb-9db1-ebbd88f7de05                         |
   | ip_version        | 6                                                            |
   | ipv6_address_mode | dhcpv6-stateful                                              |
   | ipv6_ra_mode      |                                                              |
   | name              |                                                              |
   | network_id        | 6aff6826-4278-4a35-b74d-b0ca0cbba340                         |
   | tenant_id         | 25837c567ed5458fbb441d39862e1399                             |
   +-------------------+--------------------------------------------------------------+

   Copy to Clipboard Toggle word wrap

验证步骤

1. 通过查看网络列表来验证此配置。请注意，database-servers 的条目现在反映了新创建的 IPv6 子网：

   # openstack network list
   +--------------------------------------+------------------+-------------------------------------------------------------+
   | id                                   | name             | subnets                                                     |
   +--------------------------------------+------------------+-------------------------------------------------------------+
   | 6aff6826-4278-4a35-b74d-b0ca0cbba340 | database-servers | cdfc3398-997b-46eb-9db1-ebbd88f7de05 fdf8:f53b:82e4::50/125 |
   | 8357062a-0dc2-4146-8a7f-d2575165e363 | private          | c17f74c4-db41-4538-af40-48670069af70 10.0.0.0/24            |
   | 31d61f7d-287e-4ada-ac29-ed7017a54542 | public           | 303ced03-6019-4e79-a21c-1942a460b920 172.24.4.224/28        |
   +--------------------------------------+------------------+-------------------------------------------------------------+

   Copy to Clipboard Toggle word wrap

   结果

   因此，在添加到 database-servers 子网时，QA 项目创建的实例可能会接收 DHCP IPv6 地址：

   # openstack server list
   +--------------------------------------+------------+--------+------------+-------------+-------------------------------------+
   | ID                                   | Name       | Status | Task State | Power State | Networks                            |
   +--------------------------------------+------------+--------+------------+-------------+-------------------------------------+
   | fad04b7a-75b5-4f96-aed9-b40654b56e03 | corp-vm-01 | ACTIVE | -          | Running     | database-servers=fdf8:f53b:82e4::52 |
   +--------------------------------------+------------+--------+------------+-------------+-------------------------------------+

   Copy to Clipboard Toggle word wrap