openstack【Kilo】入门【网络篇】十六：实例化网络

问题导读

1.如何添加租户网络？
2.如何添加路由？
3.网络连通性如何验证？
4.如何建立路由与租户网络、外部网络关联？

创建外部网络【控制节点】

1.生效环境变量
[mw_shl_code=bash,true]source admin-openrc.sh[/mw_shl_code]

2.创建网络
[mw_shl_code=bash,true]neutron net-create ext-net --router:external \
  --provider:physical_network external --provider:network_type flat[/mw_shl_code]
共享网络
[mw_shl_code=bash,true]neutron net-create ext-net --shared --router:external  \
--provider:physical_network external --provider:network_type flat[/mw_shl_code]

[mw_shl_code=bash,true]Created a new network:
+---------------------------+--------------------------------------+
| Field                   | Value                               |
+---------------------------+--------------------------------------+
| admin_state_up          | True                               |
| id                      | 893aebb9-1c1e-48be-8908-6b947f3237b3 |
| name                   | ext-net                            |
| provider:network_type    | flat                               |
| provider:physical_network | external                            |
| provider:segmentation_id  |                                     |
| router:external          | True                               |
| shared                   | False                               |
| status                   | ACTIVE                            |
| subnets                |                                     |
| tenant_id                | 54cd044c64d5408b83f843d63624e0d8    |
+---------------------------+--------------------------------------+[/mw_shl_code]

创建外网上的子网

[mw_shl_code=bash,true]neutron subnet-create ext-net EXTERNAL_NETWORK_CIDR --name ext-subnet \
  --allocation-pool start=FLOATING_IP_START,end=FLOATING_IP_END \
  --disable-dhcp --gateway EXTERNAL_NETWORK_GATEWAY[/mw_shl_code]

替换掉FLOATING_IP_START，FLOATING_IP_END，分别是floating ip地址的开始地址和结束地址。替换掉EXTERNAL_NETWORK_CIDR子网关联的物理网络。替换 EXTERNAL_NETWORK_GATEWAY 与物理网络的网关。通常.1ip地址。禁用子网ip地址，因为实例不直接连接外网，floating ip需要手工分配。

举例：, 使用 203.0.113.0/24  ， floating IP 地址范围 203.0.113.101 to 203.0.113.200:

[mw_shl_code=bash,true]neutron subnet-create ext-net 203.0.113.0/24 --name ext-subnet \
  --allocation-pool start=203.0.113.101,end=203.0.113.200 \
  --disable-dhcp --gateway 203.0.113.1[/mw_shl_code]

[mw_shl_code=bash,true]Created a new subnet:
+-------------------+------------------------------------------------------+
| Field          | Value                                              |
+-------------------+------------------------------------------------------+
| allocation_pools  | {"start": "203.0.113.101", "end": "203.0.113.200"} |
| cidr             | 203.0.113.0/24                                     |
| dns_nameservers |                                                    |
| enable_dhcp    | False                                              |
| gateway_ip       | 203.0.113.1                                        |
| host_routes    |                                                    |
| id             | 9159f0dc-2b63-41cf-bd7a-289309da1391                |
| ip_version       | 4                                                 |
| ipv6_address_mode |                                                    |
| ipv6_ra_mode    |                                                    |
| name             | ext-subnet                                        |
| network_id       | 893aebb9-1c1e-48be-8908-6b947f3237b3                |
| tenant_id       | 54cd044c64d5408b83f843d63624e0d8                   |
+-------------------+------------------------------------------------------+[/mw_shl_code]

[mw_shl_code=bash,true]neutron subnet-create ext-net --name ext-subnet \
  --allocation-pool start=10.0.0.101,end=10.0.0.200 \
  --disable-dhcp --gateway 10.0.0.2 10.0.0.0/24[/mw_shl_code]

##################################

创建租户网络

1.生效环境变量
[mw_shl_code=bash,true]source demo-openrc.sh[/mw_shl_code]

2.创建租户网络
[mw_shl_code=bash,true]neutron net-create demo-net[/mw_shl_code]

创建租户网络子网

创建子网
[mw_shl_code=bash,true]neutron subnet-create demo-net TENANT_NETWORK_CIDR \
  --name demo-subnet --gateway TENANT_NETWORK_GATEWAY[/mw_shl_code]

例子：
[mw_shl_code=bash,true]neutron subnet-create demo-net 192.168.1.0/24 \
  --name demo-subnet --gateway 192.168.1.1[/mw_shl_code]

[mw_shl_code=bash,true]Created a new subnet:
+-------------------+------------------------------------------------------+
| Field          | Value                                              |
+-------------------+------------------------------------------------------+
| allocation_pools  | {"start": "192.168.1.2", "end": "192.168.1.254"}    |
| cidr             | 192.168.1.0/24                                     |
| dns_nameservers |                                                    |
| enable_dhcp    | True                                              |
| gateway_ip       | 192.168.1.1                                        |
| host_routes    |                                                    |
| id             | 69d38773-794a-4e49-b887-6de6734e792d                |
| ip_version       | 4                                                 |
| ipv6_address_mode |                                                    |
| ipv6_ra_mode    |                                                    |
| name             | demo-subnet                                        |
| network_id       | ac108952-6096-4243-adf4-bb6615b3de28                |
| tenant_id       | cdef0071a0194d19ac6bb63802dc9bae                   |
+-------------------+------------------------------------------------------+[/mw_shl_code]

创建租户路由，并附加外网和租户网络到路由
[mw_shl_code=bash,true]neutron router-create demo-router[/mw_shl_code]

[mw_shl_code=bash,true]+-----------------------+--------------------------------------+
| Field                | Value                               |
+-----------------------+--------------------------------------+
| admin_state_up       | True                               |
| external_gateway_info |                                     |
| id                   | 635660ae-a254-4feb-8993-295aa9ec6418 |
| name                | demo-router                         |
| routes             |                                     |
| status             | ACTIVE                            |
| tenant_id          | cdef0071a0194d19ac6bb63802dc9bae    |
+-----------------------+--------------------------------------+[/mw_shl_code]

连接路由器到租户网络
[mw_shl_code=bash,true]neutron router-interface-add demo-router demo-subnet[/mw_shl_code]

Added interface b1a894fd-aee8-475c-9262-4342afdc1b58 to router demo-router.

连接路由器到外部网络通过设置为网关：
[mw_shl_code=bash,true]neutron router-gateway-set demo-router ext-net[/mw_shl_code]

Set gateway for router demo-router

验证安装

[mw_shl_code=bash,true]root@controller:~# ping -c 4 203.0.113.101
PING 203.0.113.101 (203.0.113.101) 56(84) bytes of data.
64 bytes from 203.0.113.101: icmp_seq=1 ttl=128 time=4.76 ms
64 bytes from 203.0.113.101: icmp_seq=2 ttl=128 time=3.87 ms
64 bytes from 203.0.113.101: icmp_seq=3 ttl=128 time=3.86 ms
64 bytes from 203.0.113.101: icmp_seq=4 ttl=128 time=3.73 ms

--- 203.0.113.101 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3007ms
rtt min/avg/max/mdev = 3.737/4.059/4.765/0.415 ms
root@controller:~# ^C
root@controller:~# ping -c 4 203.0.113.101
PING 203.0.113.101 (203.0.113.101) 56(84) bytes of data.
64 bytes from 203.0.113.101: icmp_seq=1 ttl=128 time=56.6 ms
64 bytes from 203.0.113.101: icmp_seq=2 ttl=128 time=3.86 ms
64 bytes from 203.0.113.101: icmp_seq=3 ttl=128 time=101 ms
64 bytes from 203.0.113.101: icmp_seq=4 ttl=128 time=4.42 ms

--- 203.0.113.101 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 3.863/41.512/101.157/40.554 ms[/mw_shl_code]

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