Ubuntu 16.04
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OpenStack Newton : Neutron ネットワーク構成(FLAT)
2016/11/17
 
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
# 154行目:追記

[ml2_type_flat]
flat_networks = physnet1
root@network:~#
vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
# 133行目:追記

[linux_bridge]
physical_interface_mappings = physnet1:eth1
# 176行目:コメント解除して変更

enable_vxlan =
false
root@network:~#
systemctl restart neutron-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                                 |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2016-11-18T06:59:51Z                 |
| description               |                                      |
| id                        | f8ebfce4-3459-4f1a-9afc-2aa940e699fd |
| ipv4_address_scope        |                                      |
| ipv6_address_scope        |                                      |
| mtu                       | 1500                                 |
| name                      | sharednet1                           |
| port_security_enabled     | True                                 |
| project_id                | e2fed44089aa40dc88f5ae6ed9dfe915     |
| provider:network_type     | flat                                 |
| provider:physical_network | physnet1                             |
| provider:segmentation_id  |                                      |
| revision_number           | 3                                    |
| router:external           | False                                |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      |                                      |
| tenant_id                 | e2fed44089aa40dc88f5ae6ed9dfe915     |
| updated_at                | 2016-11-18T06:59:51Z                 |
+---------------------------+--------------------------------------+

# 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 --allocation-pool start=10.0.0.200,end=10.0.0.250 \
--dns-nameserver 10.0.0.1 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                                  |
| created_at        | 2016-11-18T07:13:16Z                         |
| description       |                                              |
| dns_nameservers   | 10.0.0.1                                     |
| enable_dhcp       | True                                         |
| gateway_ip        | 10.0.0.1                                     |
| host_routes       |                                              |
| id                | d1a496c3-6f7c-46d6-9c29-826fd8039512         |
| ip_version        | 4                                            |
| ipv6_address_mode |                                              |
| ipv6_ra_mode      |                                              |
| name              |                                              |
| network_id        | f8ebfce4-3459-4f1a-9afc-2aa940e699fd         |
| project_id        | e2fed44089aa40dc88f5ae6ed9dfe915             |
| revision_number   | 2                                            |
| service_types     |                                              |
| subnetpool_id     |                                              |
| tenant_id         | e2fed44089aa40dc88f5ae6ed9dfe915             |
| updated_at        | 2016-11-18T07:13:16Z                         |
+-------------------+----------------------------------------------+

# 設定確認

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

+--------------------------------+------------+--------------------------------+
| id                             | name       | subnets                        |
+--------------------------------+------------+--------------------------------+
| f8ebfce4-3459-4f1a-9afc-       | sharednet1 | d1a496c3-6f7c-                 |
| 2aa940e699fd                   |            | 46d6-9c29-826fd8039512         |
|                                |            | 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)#
openstack image list

+--------------------------------------+------------+--------+
| ID                                   | Name       | Status |
+--------------------------------------+------------+--------+
| 7d0cf100-6017-448c-9a6b-5bcf20d93f73 | Ubuntu1604 | active |
+--------------------------------------+------------+--------+

root@dlp ~(keystone)#
openstack server create --flavor m1.small --image Ubuntu1604 --security-group default --nic net-id=$netID Ubuntu_1604
root@dlp ~(keystone)#
openstack server list

+--------------------+-------------+--------+---------------------+------------+
| ID                 | Name        | Status | Networks            | Image Name |
+--------------------+-------------+--------+---------------------+------------+
| ac239720-867d-49d5 | Ubuntu_1604 | ACTIVE | sharednet1=10.0.0.2 | Ubuntu1604 |
| -b8f5-1c387a5f95e0 |             |        | 07                  |            |
+--------------------+-------------+--------+---------------------+------------+
[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                                |
+-------------------+--------------------------------------+
| created_at        | 2016-11-18T07:18:26Z                 |
| description       |                                      |
| direction         | ingress                              |
| ethertype         | IPv4                                 |
| id                | 6580784f-03d5-441e-ba73-44347edf231c |
| port_range_max    |                                      |
| port_range_min    |                                      |
| project_id        | 1b8227c2c89e4f1cbcbbb9f6060b0416     |
| protocol          | icmp                                 |
| remote_group_id   |                                      |
| remote_ip_prefix  |                                      |
| revision_number   | 1                                    |
| security_group_id | 6f9266c8-881f-42df-a071-5ee1858a28ed |
| tenant_id         | 1b8227c2c89e4f1cbcbbb9f6060b0416     |
| updated_at        | 2016-11-18T07:18:26Z                 |
+-------------------+--------------------------------------+

# 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                                |
+-------------------+--------------------------------------+
| created_at        | 2016-11-18T07:18:41Z                 |
| description       |                                      |
| direction         | ingress                              |
| ethertype         | IPv4                                 |
| id                | 832fea91-92cd-4da2-9a00-a6f2ff4881d6 |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| project_id        | 1b8227c2c89e4f1cbcbbb9f6060b0416     |
| protocol          | tcp                                  |
| remote_group_id   |                                      |
| remote_ip_prefix  |                                      |
| revision_number   | 1                                    |
| security_group_id | 6f9266c8-881f-42df-a071-5ee1858a28ed |
| tenant_id         | 1b8227c2c89e4f1cbcbbb9f6060b0416     |
| updated_at        | 2016-11-18T07:18:41Z                 |
+-------------------+--------------------------------------+

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

+------------+----------------+-----------+-----------+---------------+---------------+
| id         | security_group | direction | ethertype | port/protocol | remote        |
+------------+----------------+-----------+-----------+---------------+---------------+
| 14bcbec0-3 | default        | ingress   | IPv4      | any           | default       |
| 8e6-44df-8 |                |           |           |               | (group)       |
| 211-d8d61d |                |           |           |               |               |
| 97697a     |                |           |           |               |               |
| 26fcb8ad-  | default        | ingress   | IPv6      | any           | default       |
| f6de-4264  |                |           |           |               | (group)       |
| -988f-b996 |                |           |           |               |               |
| f70976bb   |                |           |           |               |               |
| 3a3ca4b0-4 | default        | egress    | IPv6      | any           | any           |
| dba-4704-8 |                |           |           |               |               |
| 0e8-8df82c |                |           |           |               |               |
| 4a560f     |                |           |           |               |               |
| 5a553435-3 | default        | egress    | IPv4      | any           | any           |
| 059-4602-9 |                |           |           |               |               |
| 626-833fbb |                |           |           |               |               |
| 7e2d79     |                |           |           |               |               |
| 6580784f-  | default        | ingress   | IPv4      | icmp          | any           |
| 03d5-441e- |                |           |           |               |               |
| ba73-44347 |                |           |           |               |               |
| edf231c    |                |           |           |               |               |
| 832fea91   | default        | ingress   | IPv4      | 22/tcp        | any           |
| -92cd-4da2 |                |           |           |               |               |
| -9a00-a6f2 |                |           |           |               |               |
| ff4881d6   |                |           |           |               |               |
+------------+----------------+-----------+-----------+---------------+---------------+
[5] インスタンスにログインします。
root@dlp ~(keystone)#
ssh ubuntu@10.0.0.207

The authenticity of host '10.0.0.207 (10.0.0.207)' can't be established.
ECDSA key fingerprint is SHA256:SsoSJR8Mq6olDKmaKKcRhYhdGO9m6GXVhd3RFViSo+E.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.0.0.207' (ECDSA) to the list of known hosts.
ubuntu@10.0.0.207's password:
Welcome to Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-47-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
Last login: Fri Nov 18 10:36:51 2016
ubuntu@localhost:~$    
# ログインできた
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