preface
这章我们要实现的是创建类似阿里云ECS多flat网络。
动手操作
前提条件：每个服务器至少2块网卡，如果你的是VM虚拟机，那么每个虚拟机至少也是2块网卡。
下面是我的环境：
| 主机名 | eth0 | eth1 |
|---|---|---|
| linux-node1.example.com | 192.168.56.11 | 192.168.57.11 |
| linux-node2.example.com | 192.168.56.12 | 192.168.57.12 |
以上环境都是在之前做Openstack的基础上增加了一块eth1网卡而已。
配置IP的步骤非常简单，在此省略：
配置Neutron
1.我们在配置完成eth1的IP，就可以修改neutron的配置文件了.
linux-node1
[root@linux-node1 network-scripts]# vim /etc/neutron/plugins/ml2/linuxbridge_agent.ini
[linux_bridge]
physical_interface_mappings = public:eth0,internal:eth1
[root@linux-node1 network-scripts]# vim /etc/neutron/plugins/ml2/ml2_conf.ini
[ml2_type_flat]
flat_networks = public,internal
[root@linux-node1 network-scripts]# systemctl restart neutron-server
[root@linux-node1 network-scripts]# systemctl restart neutron-linuxbridge-agent
linux-node2
[root@linux-node2 network-scripts]# vim /etc/neutron/plugins/ml2/linuxbridge_agent.ini
[linux_bridge]
physical_interface_mappings = public:eth0,internal:eth1
[root@linux-node1 network-scripts]# systemctl restart neutron-linuxbridge-agent
- 创建网络：
[root@linux-node1 network-scripts]# source /root/admin_openrc
[root@linux-node1 network-scripts]# openstack network create --share --provider-physical-network internal --provider-network-type flat internal
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | UP |
| availability_zone_hints | |
| availability_zones | |
| created_at | 2017-02-11T08:50:58Z |
| description | |
| headers | |
| id | 836b0b92-37d9-4527-b49e-053f9938b08b |
| ipv4_address_scope | None |
| ipv6_address_scope | None |
| mtu | 1500 |
| name | internal |
| port_security_enabled | True |
| project_id | 6197e636277d41ce8b0a835fbca4f87a |
| project_id | 6197e636277d41ce8b0a835fbca4f87a |
| provider:network_type | flat |
| provider:physical_network | internal |
| provider:segmentation_id | None |
| revision_number | 3 |
| router:external | Internal |
| shared | True |
| status | ACTIVE |
| subnets | |
| tags | [] |
| updated_at | 2017-02-11T08:50:58Z |
+---------------------------+--------------------------------------+
[root@linux-node1 network-scripts]# openstack subnet create --network internal
> --allocation-pool start=192.168.57.100,end=192.168.57.200
> --dns-nameserver 192.168.56.2 --gateway 192.168.57.2
> --subnet-range 192.168.57.0/24 internal-subnet
+-------------------+--------------------------------------+
| Field | Value |
+-------------------+--------------------------------------+
| allocation_pools | 192.168.57.100-192.168.57.200 |
| cidr | 192.168.57.0/24 |
| created_at | 2017-02-11T08:59:26Z |
| description | |
| dns_nameservers | 192.168.56.2 |
| enable_dhcp | True |
| gateway_ip | 192.168.57.2 |
| headers | |
| host_routes | |
| id | 9eb5e89f-c07e-4f34-ae8b-e01fa177b642 |
| ip_version | 4 |
| ipv6_address_mode | None |
| ipv6_ra_mode | None |
| name | internal-subnet |
| network_id | 836b0b92-37d9-4527-b49e-053f9938b08b |
| project_id | 6197e636277d41ce8b0a835fbca4f87a |
| project_id | 6197e636277d41ce8b0a835fbca4f87a |
| revision_number | 2 |
| service_types | [] |
| subnetpool_id | None |
| updated_at | 2017-02-11T08:59:27Z |
+-------------------+--------------------------------------+
3.验证网络是否创建成功
[root@linux-node1 network-scripts]# neutron net-list
+--------------------------------------+----------+------------------------------------------------------+
| id | name | subnets |
+--------------------------------------+----------+------------------------------------------------------+
| 33b9ef50-354b-457b-8ea2-8498ec64835b | public | 66e18ef3-08cd-4bd2-b12d-4660fb240b59 192.168.56.0/24 |
| 836b0b92-37d9-4527-b49e-053f9938b08b | internal | 9eb5e89f-c07e-4f34-ae8b-e01fa177b642 192.168.57.0/24 |
+--------------------------------------+----------+------------------------------------------------------+
[root@linux-node1 network-scripts]# neutron sub-net list
Unknown command [u'sub-net', u'list']
[root@linux-node1 network-scripts]# neutron subnet-list
+--------------------------------------+-----------------+-----------------+------------------------------------------------------+
| id | name | cidr | allocation_pools |
+--------------------------------------+-----------------+-----------------+------------------------------------------------------+
| 66e18ef3-08cd-4bd2-b12d-4660fb240b59 | public-subnet | 192.168.56.0/24 | {"start": "192.168.56.100", "end": "192.168.56.200"} |
| 9eb5e89f-c07e-4f34-ae8b-e01fa177b642 | internal-subnet | 192.168.57.0/24 | {"start": "192.168.57.100", "end": "192.168.57.200"} |
+--------------------------------------+-----------------+-----------------+------------------------------------------------------+
4.创建双网络的云主机
这里需要说明的是，添加网络的时候先后顺序是有区别的，如下图所示，先添加internal的话，那么云主机eth0就是internal的网段的IP，eth1就是public网段的IP
创建成功后的云主机具有两个网段的IP
