Ubuntu 16.04
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OpenStack Queens : Neutron ネットワークを構成する (FLAT)
2018/03/13
 
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。
     ------------+---------------------------+---------------------------+------------
                 |                           |                           |
             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                | 2018-03-15T06:50:05Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | 583148af-e031-4c0d-887b-978ee63150da |
| 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                | ffc35f92a94a4df8b512f342421ed01e     |
| 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                | 2018-03-15T06:50:06Z                 |
+---------------------------+--------------------------------------+

# [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        | 2018-03-15T06:50:28Z                 |
| description       |                                      |
| dns_nameservers   | 10.0.0.10                            |
| enable_dhcp       | True                                 |
| gateway_ip        | 10.0.0.1                             |
| host_routes       |                                      |
| id                | 40940b21-5b58-4ca4-abee-1f8f992a514b |
| ip_version        | 4                                    |
| ipv6_address_mode | None                                 |
| ipv6_ra_mode      | None                                 |
| name              | subnet1                              |
| network_id        | 583148af-e031-4c0d-887b-978ee63150da |
| project_id        | ffc35f92a94a4df8b512f342421ed01e     |
| revision_number   | 0                                    |
| segment_id        | None                                 |
| service_types     |                                      |
| subnetpool_id     | None                                 |
| tags              |                                      |
| updated_at        | 2018-03-15T06:50:28Z                 |
+-------------------+--------------------------------------+

# 設定確認

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 583148af-e031-4c0d-887b-978ee63150da | sharednet1 | 40940b21-5b58-4ca4-abee-1f8f992a514b |
+--------------------------------------+------------+--------------------------------------+
[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 |
+--------------------------------------+------------+--------+
| 217a694d-e526-4921-a018-6b1e6874ef44 | Ubuntu1604 | active |
+--------------------------------------+------------+--------+

# 利用可能なネットワーク確認

ubuntu@dlp ~(keystone)$
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 583148af-e031-4c0d-887b-978ee63150da | sharednet1 | 40940b21-5b58-4ca4-abee-1f8f992a514b |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2018-03-15T06:55:02Z                                                              |
| description     | secgroup01                                                                        |
| id              | 395dced0-e033-46d0-9ddd-ef78d196c2b1                                              |
| name            | secgroup01                                                                        |
| project_id      | 142ba5a5d91c4148a4caa9227e05b504                                                  |
| revision_number | 2                                                                                 |
| rules           | created_at='2018-03-15T06:55:03Z', direction='egress', ethertype='IPv4', id='...' |
|                 | created_at='2018-03-15T06:55:03Z', direction='egress', ethertype='IPv6', id='...' |
| updated_at      | 2018-03-15T06:55:03Z                                                              |
+-----------------+-----------------------------------------------------------------------------------+

# 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 | ec:94:28:27:00:1e:90:09:24:b5:e5:23:79:26:ed:82 |
| name        | mykey                                           |
| user_id     | b7b1b4b96b714e458690dd893fbbe5f5                |
+-------------+-------------------------------------------------+

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

ubuntu@dlp ~(keystone)$
openstack server create --flavor m1.small --image Ubuntu1604 --security-group secgroup01 --nic net-id=$netID --key-name mykey Ubuntu_1604
ubuntu@dlp ~(keystone)$
openstack server list

+--------------------------------------+-------------+--------+-----------------------+------------+----------+
| ID                                   | Name        | Status | Networks              | Image      | Flavor   |
+--------------------------------------+-------------+--------+-----------------------+------------+----------+
| f2bc94ef-2b54-40aa-b940-dfc977b31717 | Ubuntu_1604 | ACTIVE | sharednet1=10.0.0.208 | Ubuntu1604 | 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        | 2018-03-15T07:10:38Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | ab347ca5-733c-4b8b-8517-c7b877e88c05 |
| name              | None                                 |
| port_range_max    | None                                 |
| port_range_min    | None                                 |
| project_id        | 142ba5a5d91c4148a4caa9227e05b504     |
| protocol          | icmp                                 |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | 933b3c77-0b90-4914-8c96-2d33c7e986f5 |
| updated_at        | 2018-03-15T07:10:38Z                 |
+-------------------+--------------------------------------+

# SSH 許可

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

+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2018-03-15T07:10:44Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | bf75faa3-0d56-46e1-8697-01c738e3cf11 |
| name              | None                                 |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| project_id        | 142ba5a5d91c4148a4caa9227e05b504     |
| protocol          | tcp                                  |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | 933b3c77-0b90-4914-8c96-2d33c7e986f5 |
| updated_at        | 2018-03-15T07:10:44Z                 |
+-------------------+--------------------------------------+

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

+--------------+-------------+-----------+------------+-----------------------------+-------------------+
| ID           | IP Protocol | IP Range  | Port Range | Remote Security Group       | Security Group    |
+--------------+-------------+-----------+------------+-----------------------------+-------------------+
| 2374f9c6-... | None        | None      |            | None                        | 395dced0-e033-... |
| 3e90d0fb-... | None        | None      |            | 933b3c77-0b90-4914-8c96-... | 933b3c77-0b90-... |
| 520d7b7d-... | None        | None      |            | None                        | 933b3c77-0b90-... |
| 72c7ef17-... | None        | None      |            | None                        | 933b3c77-0b90-... |
| 9225abd6-... | None        | None      |            | 933b3c77-0b90-4914-8c96-... | 933b3c77-0b90-... |
| ab347ca5-... | icmp        | 0.0.0.0/0 |            | None                        | 933b3c77-0b90-... |
| bf75faa3-... | tcp         | 0.0.0.0/0 | 22:22      | None                        | 933b3c77-0b90-... |
| fc204462-... | None        | None      |            | None                        | 395dced0-e033-... |
+--------------+-------------+-----------+------------+-----------------------------+-------------------+
[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:HPkZg/5hmNPaaRaVrcq8Fgm4JS/Ups1JGuuLf3g1K7Q.
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 16.04.4 LTS (GNU/Linux 4.4.0-116-generic x86_64)

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