Ubuntu 18.04
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OpenStack Queens : Neutron ネットワークを構成する (FLAT)
2018/06/15
 
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。
事前に以下のように Control ノードNetwork ノードCompute ノードの 各 Neutron サービスノードを構築済みであることが前提です。
また、当例では Network ノードと Compute ノードが二つのネットワークインターフェースを持っているものとします。また、下例で eth1 の方は IP なしでインターフェースを UP しています。 IP なしでのインターフェース UP の設定はこちらの [1] を参照ください
------------+---------------------------+---------------------------+------------
            |                           |                           |
        eth0|10.0.0.30              eth0|10.0.0.50              eth0|10.0.0.51
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|    [ Control Node ]   |   |    [ Network Node ]   |   |    [ Compute Node ]   |
|                       |   |                       |   |                       |
|  MariaDB    RabbitMQ  |   |        L2 Agent       |   |        Libvirt        |
|  Memcached  httpd     |   |        L3 Agent       |   |     Nova Compute      |
|  Keystone   Glance    |   |     Metadata Agent    |   |        L2 Agent       |
|  Nova API             |   |                       |   |                       |
|  Neutron Server       |   |                       |   |                       |
|  Metadata Agent       |   |                       |   |                       |
+-----------------------+   +-----------+-----------+   +-----------+-----------+
                                        |eth1                       |eth1

[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
# 181行目:追記

[ml2_type_flat]
flat_networks = physnet1
root@network:~#
vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
# 147行目:追記

[linux_bridge]
physical_interface_mappings = physnet1:eth1
# 208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、当例では Control ノード上で作業します。
root@dlp ~(keystone)#
projectID=$(openstack project list | grep service | awk '{print $2}')
# [sharednet1] という名称のネットワークを作成

root@dlp ~(keystone)#
openstack network create --project $projectID \
--share --provider-network-type flat --provider-physical-network physnet1 sharednet1

Created a new network:
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | UP                                   |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2018-06-15T07:22:26Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | bfc23d8f-24ce-4a92-97d2-03ad411f2a40 |
| ipv4_address_scope        | None                                 |
| ipv6_address_scope        | None                                 |
| is_default                | False                                |
| is_vlan_transparent       | None                                 |
| mtu                       | 1500                                 |
| name                      | sharednet1                           |
| port_security_enabled     | True                                 |
| project_id                | fa8bf7aca73e44cb9bc2c9f42859857e     |
| provider:network_type     | flat                                 |
| provider:physical_network | physnet1                             |
| provider:segmentation_id  | None                                 |
| qos_policy_id             | None                                 |
| revision_number           | 2                                    |
| router:external           | Internal                             |
| segments                  | None                                 |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      |                                      |
| updated_at                | 2018-06-15T07:22:26Z                 |
+---------------------------+--------------------------------------+

# [sharednet1] に [10.0.0.0/24] のサブネットを作成

root@dlp ~(keystone)#
openstack subnet create subnet1 --network sharednet1 \
--project $projectID --subnet-range 10.0.0.0/24 \
--allocation-pool start=10.0.0.200,end=10.0.0.254 \
--gateway 10.0.0.1 --dns-nameserver 10.0.0.10

Created a new subnet:
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| allocation_pools  | 10.0.0.200-10.0.0.254                |
| cidr              | 10.0.0.0/24                          |
| created_at        | 2018-06-15T07:22:52Z                 |
| description       |                                      |
| dns_nameservers   | 10.0.0.10                            |
| enable_dhcp       | True                                 |
| gateway_ip        | 10.0.0.1                             |
| host_routes       |                                      |
| id                | 64253ec7-2ee5-492e-b658-ce3ce4ac9936 |
| ip_version        | 4                                    |
| ipv6_address_mode | None                                 |
| ipv6_ra_mode      | None                                 |
| name              | subnet1                              |
| network_id        | bfc23d8f-24ce-4a92-97d2-03ad411f2a40 |
| project_id        | fa8bf7aca73e44cb9bc2c9f42859857e     |
| revision_number   | 0                                    |
| segment_id        | None                                 |
| service_types     |                                      |
| subnetpool_id     | None                                 |
| tags              |                                      |
| updated_at        | 2018-06-15T07:22:52Z                 |
+-------------------+--------------------------------------+

# 設定確認

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| bfc23d8f-24ce-4a92-97d2-03ad411f2a40 | sharednet1 | 64253ec7-2ee5-492e-b658-ce3ce4ac9936 |
+--------------------------------------+------------+--------------------------------------+
[3] 任意のユーザーでログインし、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。
# 利用可能な flavor 確認

ubuntu@dlp ~(keystone)$
openstack flavor list

+----+----------+------+------+-----------+-------+-----------+
| ID | Name     |  RAM | Disk | Ephemeral | VCPUs | Is Public |
+----+----------+------+------+-----------+-------+-----------+
| 0  | m1.small | 2048 |   10 |         0 |     1 | True      |
+----+----------+------+------+-----------+-------+-----------+

# 利用可能なイメージ確認

ubuntu@dlp ~(keystone)$
openstack image list

+--------------------------------------+------------+--------+
| ID                                   | Name       | Status |
+--------------------------------------+------------+--------+
| bb285a87-fe42-449a-a659-b5a304177b18 | Ubuntu1804 | active |
+--------------------------------------+------------+--------+

# 利用可能なネットワーク確認

ubuntu@dlp ~(keystone)$
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| bfc23d8f-24ce-4a92-97d2-03ad411f2a40 | sharednet1 | 64253ec7-2ee5-492e-b658-ce3ce4ac9936 |
+--------------------------------------+------------+--------------------------------------+

# インスタンス用のセキュリティグループを作成

ubuntu@dlp ~(keystone)$
openstack security group create secgroup01

+-----------------+-----------------------------------------------------------------------------------+
| Field           | Value                                                                             |
+-----------------+-----------------------------------------------------------------------------------+
| created_at      | 2018-06-15T07:26:14Z                                                              |
| description     | secgroup01                                                                        |
| id              | f1713a90-8389-4d42-a61c-7781fdb2a903                                              |
| name            | secgroup01                                                                        |
| project_id      | 9b4516711a0a4543ba5adfe7510ea1a1                                                  |
| revision_number | 2                                                                                 |
| rules           | created_at='2018-06-15T07:26:14Z', direction='egress', ethertype='IPv4', id='6... |
|                 | created_at='2018-06-15T07:26:14Z', direction='egress', ethertype='IPv6', id='e... |
| updated_at      | 2018-06-15T07:26:14Z                                                              |
+-----------------+-----------------------------------------------------------------------------------+

# インスタンス接続用の SSH キーペア作成

ubuntu@dlp ~(keystone)$
ssh-keygen -q -N ""

Enter file in which to save the key (/home/ubuntu/.ssh/id_rsa):
# 公開鍵登録

ubuntu@dlp ~(keystone)$
openstack keypair create --public-key ~/.ssh/id_rsa.pub mykey

+-------------+-------------------------------------------------+
| Field       | Value                                           |
+-------------+-------------------------------------------------+
| fingerprint | f5:17:31:c3:eb:90:dc:d5:e4:50:41:47:8c:cb:55:3b |
| name        | mykey                                           |
| user_id     | a212f017161d42228c47b3aef27f9f6c                |
+-------------+-------------------------------------------------+

ubuntu@dlp ~(keystone)$
netID=$(openstack network list | grep sharednet1 | awk '{ print $2 }')

ubuntu@dlp ~(keystone)$
openstack server create --flavor m1.small --image Ubuntu1804 --security-group secgroup01 --nic net-id=$netID --key-name mykey Ubuntu_1804
ubuntu@dlp ~(keystone)$
openstack server list

+--------------------------------------+-------------+--------+-----------------------+------------+----------+
| ID                                   | Name        | Status | Networks              | Image      | Flavor   |
+--------------------------------------+-------------+--------+-----------------------+------------+----------+
| 833834ef-de72-4a48-90d8-25ac6beacc9f | Ubuntu_1804 | ACTIVE | sharednet1=10.0.0.208 | Ubuntu1804 | m1.small |
+--------------------------------------+-------------+--------+-----------------------+------------+----------+
[4] 起動した仮想マシンインスタンスに SSH 接続できるように、先に作成したセキュリティグループにポート許可の設定を追加します。
# ICMP 許可

ubuntu@dlp ~(keystone)$
openstack security group rule create --protocol icmp --ingress default

+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2018-06-15T07:41:06Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | c949ae40-65b4-4be6-a375-054749815b7d |
| name              | None                                 |
| port_range_max    | None                                 |
| port_range_min    | None                                 |
| project_id        | 9b4516711a0a4543ba5adfe7510ea1a1     |
| protocol          | icmp                                 |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | f5ddf9ce-9c8d-4c78-95ea-1099e294274c |
| updated_at        | 2018-06-15T07:41:06Z                 |
+-------------------+--------------------------------------+

# SSH 許可

ubuntu@dlp ~(keystone)$
openstack security group rule create --protocol tcp --dst-port 22:22 default

+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2018-06-15T07:41:19Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | 4a75366e-cacc-49b6-b2bd-8fe94873778c |
| name              | None                                 |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| project_id        | 9b4516711a0a4543ba5adfe7510ea1a1     |
| protocol          | tcp                                  |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | f5ddf9ce-9c8d-4c78-95ea-1099e294274c |
| updated_at        | 2018-06-15T07:41:19Z                 |
+-------------------+--------------------------------------+

ubuntu@dlp ~(keystone)$
openstack security group rule list

+----------+-------------+-----------+------------+--------------------------------------+-------------------+
| ID       | IP Protocol | IP Range  | Port Range | Remote Security Group                | Security Group    |
+----------+-------------+-----------+------------+--------------------------------------+-------------------+
| 2792d... | None        | None      |            | f5ddf9ce-9c8d-4c78-95ea-1099e294274c | f5ddf9ce-9c8d-... |
| 3303e... | None        | None      |            | None                                 | f5ddf9ce-9c8d-... |
| 4a753... | tcp         | 0.0.0.0/0 | 22:22      | None                                 | f5ddf9ce-9c8d-... |
| 6b888... | None        | None      |            | None                                 | f1713a90-8389-... |
| b14b0... | None        | None      |            | f5ddf9ce-9c8d-4c78-95ea-1099e294274c | f5ddf9ce-9c8d-... |
| b6051... | None        | None      |            | None                                 | f5ddf9ce-9c8d-... |
| c949a... | icmp        | 0.0.0.0/0 |            | None                                 | f5ddf9ce-9c8d-... |
| e8077... | None        | None      |            | None                                 | f1713a90-8389-... |
+----------+-------------+-----------+------------+--------------------------------------+-------------------+
[5] インスタンスにログインします。
ubuntu@dlp ~(keystone)$
ssh ubuntu@10.0.0.208

The authenticity of host '10.0.0.208 (10.0.0.208)' can't be established.
ECDSA key fingerprint is SHA256:/23tlmEk91VOrjfJwpxJLcJo1KSaSHoO9VuAu1uFrgw.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.0.0.208' (ECDSA) to the list of known hosts.
Welcome to Ubuntu 18.04 LTS (GNU/Linux 4.15.0-23-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Fri Jun 15 16:43:04 JST 2018

  System load:  0.14              Processes:           89
  Usage of /:   19.5% of 8.80GB   Users logged in:     0
  Memory usage: 6%                IP address for ens3: 10.0.0.208
  Swap usage:   0%

23 packages can be updated.
18 updates are security updates.

ubuntu@ubuntu-1804:~$    
# ログインできた
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