Ubuntu 14.04
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OpenStack Liberty : Neutron ネットワーク構成(FLAT)
2015/12/27
 
OpenStack Network Service(Neutron)による仮想ネットワークの構成です。
例として、FLAT タイプのプロバイダーネットワークを構成します。
Control ノードNetwork ノードCompute ノードはそれぞれ事前に基本設定をしておいてください。
また、Network ノードと Compute ノードはネットワークインターフェースを二つ持っていることを前提とします。

                                        |
  +-------------+                  +----+----+
  | Name Server |                  | Gateway |
  +------+------+                  +----+----+
         |10.0.0.10                     |10.0.0.1
         |                              |
         +------------+-----------------+------------------+
         |            |                 |                  |     10.0.0.200-10.0.0.250
     eth0|10.0.0.30   |             eth0|10.0.0.50         |         +-----------------+
+--------+---------+  |     +-----------+----------+       |     +---| Virtual Machine |
| [ Control Node ] |  |     |   [ Network Node ]   |       |     |   +-----------------+
|     Keystone     |  |     |       DHCP Agent     |       |     |   +-----------------+
|      Glance      |  |     |       L3 Agent       |eth1   |     |---| Virtual Machine |
|     Nova API     |  |     |       L2 Agent       |       |     |   +-----------------+
|  Neutron Server  |  |     |    Metadata Agent    |       |     |   +-----------------+
+------------------+  |     +----------------------+       +-----+---| Virtual Machine |
                      |                                          |   +-----------------+
                      |     +----------------------+             |   +-----------------+
                      | eth0|   [ Compute Node ]   |             |---| Virtual Machine |
                      +-----|     Nova Compute     |eth1         |   +-----------------+
                   10.0.0.51|       L2 Agent       |             |   +-----------------+
                            +----------------------+             +---| Virtual Machine |
                                                                     +-----------------+

[1] Network ノード、および Compute ノードの両方で以下のように設定します。
root@network:~#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# 66行目あたり:追記

[ml2_type_flat]
flat_networks = physnet1
root@network:~#
vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
# 2行目:追記

[linux_bridge]
physical_interface_mappings = physnet1:eth1
root@network:~#
initctl restart neutron-plugin-linuxbridge-agent

[2] ネットワークを作成します。作業場所はどこでもよいですが、ここでは Control ノード上で作業します。
root@dlp ~(keystone)#
tenantID=`openstack project list | grep service | awk '{print $2}'`
# 「sharednet1」という名前のネットワークを作成

root@dlp ~(keystone)#
neutron net-create --tenant-id $tenantID sharednet1 \
--shared --provider:network_type flat --provider:physical_network physnet1

Created a new network:
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | True                                 |
| id                        | 440891ad-4d07-4536-90f1-f871d85d8eb7 |
| mtu                       | 0                                    |
| name                      | sharednet1                           |
| port_security_enabled     | True                                 |
| provider:network_type     | flat                                 |
| provider:physical_network | physnet1                             |
| provider:segmentation_id  |                                      |
| router:external           | False                                |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tenant_id                 | ba3f5997c2474c13b36e6f6bc47a264c     |
+---------------------------+--------------------------------------+

# 作成した「sharednet1」に「10.0.0.0/24」のサブネットを作成

root@dlp ~(keystone)#
neutron subnet-create \
--tenant-id $tenantID --gateway 10.0.0.1 --dns-nameserver 10.0.0.1 \
--allocation-pool start=10.0.0.200,end=10.0.0.250 sharednet1 10.0.0.0/24

Created a new subnet:
+-------------------+----------------------------------------------+
| Field             | Value                                        |
+-------------------+----------------------------------------------+
| allocation_pools  | {"start": "10.0.0.200", "end": "10.0.0.250"} |
| cidr              | 10.0.0.0/24                                  |
| dns_nameservers   | 10.0.0.1                                     |
| enable_dhcp       | True                                         |
| gateway_ip        | 10.0.0.1                                     |
| host_routes       |                                              |
| id                | f135f571-9494-4c22-b84a-957bf4c52a6a         |
| ip_version        | 4                                            |
| ipv6_address_mode |                                              |
| ipv6_ra_mode      |                                              |
| name              |                                              |
| network_id        | 440891ad-4d07-4536-90f1-f871d85d8eb7         |
| subnetpool_id     |                                              |
| tenant_id         | ba3f5997c2474c13b36e6f6bc47a264c             |
+-------------------+----------------------------------------------+

# 設定確認

root@dlp ~(keystone)#
neutron net-list

+--------------------------------------+------------+--------------------------------------------------+
| id                                   | name       | subnets                                          |
+--------------------------------------+------------+--------------------------------------------------+
| 440891ad-4d07-4536-90f1-f871d85d8eb7 | sharednet1 | f135f571-9494-4c22-b84a-957bf4c52a6a 10.0.0.0/24 |
+--------------------------------------+------------+--------------------------------------------------+
[3] 作成したネットワークをインスタンスに紐付けてインスタンスを作成・起動します。
root@dlp ~(keystone)#
netID=`neutron net-list | grep sharednet1 | awk '{print $2}'`

root@dlp ~(keystone)#
nova image-list

+--------------------------------------+------------+--------+--------+
| ID                                   | Name       | Status | Server |
+--------------------------------------+------------+--------+--------+
| f29a589b-595a-4f0c-bbce-f6f3537f2a7c | Ubuntu1404 | ACTIVE |        |
+--------------------------------------+------------+--------+--------+

root@dlp ~(keystone)#
nova boot --flavor 2 --image Ubuntu1404 --security_group default --nic net-id=$netID Ubuntu_1404
root@dlp ~(keystone)#
nova list

+-----------+-------------+--------+------------+-------------+-----------------------+
| ID        | Name        | Status | Task State | Power State | Networks              |
+-----------+-------------+--------+------------+-------------+-----------------------+
| df1aafb6- | Ubuntu_1404 | ACTIVE | -          | Running     | sharednet1=10.0.0.201 |
+-----------+-------------+--------+------------+-------------+-----------------------+
[4] 起動した仮想マシンインスタンスにSSHで接続できるように、デフォルトセキュリティグループにポート許可の設定をしておきます。
# ICMP 許可

root@dlp ~(keystone)#
neutron security-group-rule-create --direction ingress --protocol icmp default

Created a new security_group_rule:
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| direction         | ingress                              |
| ethertype         | IPv4                                 |
| id                | eb5f5557-397b-4662-aa28-a85e67a6d5c1 |
| port_range_max    |                                      |
| port_range_min    |                                      |
| protocol          | icmp                                 |
| remote_group_id   |                                      |
| remote_ip_prefix  |                                      |
| security_group_id | 29cb0389-e33a-4e65-9db5-6e3e18901a07 |
| tenant_id         | fa7d34414b8c45c4a2fdc29403fb5cd2     |
+-------------------+--------------------------------------+

# SSH 許可

root@dlp ~(keystone)#
neutron security-group-rule-create --direction ingress --protocol tcp --port_range_min 22 --port_range_max 22 default

Created a new security_group_rule:
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| direction         | ingress                              |
| ethertype         | IPv4                                 |
| id                | 96c37376-3cd2-4499-abb0-cb6efc0702fd |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| protocol          | tcp                                  |
| remote_group_id   |                                      |
| remote_ip_prefix  |                                      |
| security_group_id | 29cb0389-e33a-4e65-9db5-6e3e18901a07 |
| tenant_id         | fa7d34414b8c45c4a2fdc29403fb5cd2     |
+-------------------+--------------------------------------+

root@dlp ~(keystone)#
neutron security-group-rule-list

+--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
| id                                   | security_group | direction | ethertype | protocol/port | remote          |
+--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
| 67c6be2e-640f-4c3b-9b46-367366c0afeb | default        | ingress   | IPv4      | any           | default (group) |
| 96c37376-3cd2-4499-abb0-cb6efc0702fd | default        | ingress   | IPv4      | 22/tcp        | any             |
| a3779b4e-2042-4264-b8d0-3d3ffb5c6fec | default        | ingress   | IPv6      | any           | default (group) |
| d8566bc8-46ac-4118-adca-2dd0b3d61893 | default        | egress    | IPv6      | any           | any             |
| eb5f5557-397b-4662-aa28-a85e67a6d5c1 | default        | ingress   | IPv4      | icmp          | any             |
| ee3585ff-23fb-42db-baa7-c3271bdd8c77 | default        | egress    | IPv4      | any           | any             |
+--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
[5] インスタンスにログインします。
root@dlp ~(keystone)#
ssh trusty@10.0.0.201

The authenticity of host '10.0.0.201 (10.0.0.201)' can't be established.
ECDSA key fingerprint is 16:b5:42:59:1c:f1:9f:0f:fa:2b:27:70:7b:c3:44:7f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.0.0.201' (ECDSA) to the list of known hosts.
trusty@10.0.0.201's password:
Welcome to Ubuntu 14.04.3 LTS (GNU/Linux 3.13.0-74-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

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0 updates are security updates.

Last login: Mon Dec 28 22:43:11 2015
trusty@ubuntu:~$    
# ログインできた
 
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