Ubuntu 20.04
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OpenStack Yoga : Neutron ネットワークを構成 (FLAT)
2022/04/04
 
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 2 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|(UP with no IP)        eth1|(UP with no IP)

[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
# 206行目 : 追記

[ml2_type_flat]
flat_networks = physnet1
root@network:~#
vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
# 190行目 : 追記

[linux_bridge]
physical_interface_mappings = physnet1:eth1
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

+---------------------------+---------------------------------------------------------------------+
| Field                     | Value                                                               |
+---------------------------+---------------------------------------------------------------------+
| admin_state_up            | UP                                                                  |
| availability_zone_hints   |                                                                     |
| availability_zones        |                                                                     |
| created_at                | 2022-04-04T03:43:33Z                                                |
| description               |                                                                     |
| dns_domain                | None                                                                |
| id                        | 4b661c82-828a-450e-b5bb-bbdd682b3ade                                |
| ipv4_address_scope        | None                                                                |
| ipv6_address_scope        | None                                                                |
| is_default                | False                                                               |
| is_vlan_transparent       | None                                                                |
| location                  | Munch({'cloud': '', 'region_name': '', 'zone': None, 'project'..... |
| mtu                       | 1500                                                                |
| name                      | sharednet1                                                          |
| port_security_enabled     | True                                                                |
| project_id                | c043fb355eff47e69642adfcd7a55620                                    |
| provider:network_type     | flat                                                                |
| provider:physical_network | physnet1                                                            |
| provider:segmentation_id  | None                                                                |
| qos_policy_id             | None                                                                |
| revision_number           | 1                                                                   |
| router:external           | Internal                                                            |
| segments                  | None                                                                |
| shared                    | True                                                                |
| status                    | ACTIVE                                                              |
| subnets                   |                                                                     |
| tags                      |                                                                     |
| updated_at                | 2022-04-04T03:43:33Z                                                |
+---------------------------+---------------------------------------------------------------------+

# [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

+----------------------+----------------------------------------------------------------------------+
| Field                | Value                                                                      |
+----------------------+----------------------------------------------------------------------------+
| allocation_pools     | 10.0.0.200-10.0.0.254                                                      |
| cidr                 | 10.0.0.0/24                                                                |
| created_at           | 2022-04-04T03:44:12Z                                                       |
| description          |                                                                            |
| dns_nameservers      | 10.0.0.10                                                                  |
| dns_publish_fixed_ip | None                                                                       |
| enable_dhcp          | True                                                                       |
| gateway_ip           | 10.0.0.1                                                                   |
| host_routes          |                                                                            |
| id                   | 9cc8391d-d917-4c5a-8594-7dca26b7ba52                                       |
| ip_version           | 4                                                                          |
| ipv6_address_mode    | None                                                                       |
| ipv6_ra_mode         | None                                                                       |
| location             | Munch({'cloud': '', 'region_name': '', 'zone': None, 'project': Munch..... |
| name                 | subnet1                                                                    |
| network_id           | 4b661c82-828a-450e-b5bb-bbdd682b3ade                                       |
| project_id           | c043fb355eff47e69642adfcd7a55620                                           |
| revision_number      | 0                                                                          |
| segment_id           | None                                                                       |
| service_types        |                                                                            |
| subnetpool_id        | None                                                                       |
| tags                 |                                                                            |
| updated_at           | 2022-04-04T03:44:12Z                                                       |
+----------------------+----------------------------------------------------------------------------+

# 設定確認

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 4b661c82-828a-450e-b5bb-bbdd682b3ade | sharednet1 | 9cc8391d-d917-4c5a-8594-7dca26b7ba52 |
+--------------------------------------+------------+--------------------------------------+
[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関連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 |
+--------------------------------------+------------+--------+
| 53f6415a-1f98-485f-be0b-3f80edf523df | Ubuntu2004 | active |
+--------------------------------------+------------+--------+

# 利用可能なネットワーク確認

ubuntu@dlp ~(keystone)$
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 4b661c82-828a-450e-b5bb-bbdd682b3ade | sharednet1 | 9cc8391d-d917-4c5a-8594-7dca26b7ba52 |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2022-04-04T03:46:50Z                                                       |
| description     | secgroup01                                                                 |
| id              | 442b3351-ecff-49be-a48b-c5f36bc906b9                                       |
| location        | Munch({'cloud': '', 'region_name': '', 'zone': None, 'project': Munch(.... |
| name            | secgroup01                                                                 |
| project_id      | d3434f55aa5541cfab5f13916da0697d                                           |
| revision_number | 1                                                                          |
| rules           | created_at='2022-04-04T03:46:50Z', direction='egress', ethertype='IPv6.... |
|                 | created_at='2022-04-04T03:46:50Z', direction='egress', ethertype='IPv4.... |
| stateful        | True                                                                       |
| tags            | []                                                                         |
| updated_at      | 2022-04-04T03:46:50Z                                                       |
+-----------------+----------------------------------------------------------------------------+

# 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                                           |
+-------------+-------------------------------------------------+
| created_at  | None                                            |
| fingerprint | c1:4e:1a:12:3a:d1:b5:dd:64:c8:52:4d:2f:3c:6e:82 |
| id          | mykey                                           |
| is_deleted  | None                                            |
| name        | mykey                                           |
| type        | ssh                                             |
| user_id     | 95f196a1851c4b93b016871f7d5ded82                |
+-------------+-------------------------------------------------+

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

ubuntu@dlp ~(keystone)$
openstack server create --flavor m1.small --image Ubuntu2004 --security-group secgroup01 --nic net-id=$netID --key-name mykey Ubuntu-2004
ubuntu@dlp ~(keystone)$
openstack server list

+--------------------------------------+-------------+--------+-----------------------+------------+----------+
| ID                                   | Name        | Status | Networks              | Image      | Flavor   |
+--------------------------------------+-------------+--------+-----------------------+------------+----------+
| 7e6b6996-a067-4fd3-a9dd-13bd4ba6fc23 | Ubuntu-2004 | ACTIVE | sharednet1=10.0.0.233 | Ubuntu2004 | 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 secgroup01

+-------------------------+-----------------------------------------------------------------------+
| Field                   | Value                                                                 |
+-------------------------+-----------------------------------------------------------------------+
| created_at              | 2022-04-04T04:40:20Z                                                  |
| description             |                                                                       |
| direction               | ingress                                                               |
| ether_type              | IPv4                                                                  |
| id                      | 8d2a4bc7-1a0c-4ec0-b77d-b5522de3b603                                  |
| location                | Munch({'cloud': '', 'region_name': '', 'zone': None, 'project': ..... |
| name                    | None                                                                  |
| port_range_max          | None                                                                  |
| port_range_min          | None                                                                  |
| project_id              | d3434f55aa5541cfab5f13916da0697d                                      |
| protocol                | icmp                                                                  |
| remote_address_group_id | None                                                                  |
| remote_group_id         | None                                                                  |
| remote_ip_prefix        | 0.0.0.0/0                                                             |
| revision_number         | 0                                                                     |
| security_group_id       | 442b3351-ecff-49be-a48b-c5f36bc906b9                                  |
| tags                    | []                                                                    |
| updated_at              | 2022-04-04T04:40:20Z                                                  |
+-------------------------+-----------------------------------------------------------------------+

# SSH 許可

ubuntu@dlp ~(keystone)$
openstack security group rule create --protocol tcp --dst-port 22:22 secgroup01

+-------------------------+------------------------------------------------------------------------+
| Field                   | Value                                                                  |
+-------------------------+------------------------------------------------------------------------+
| created_at              | 2022-04-04T04:40:49Z                                                   |
| description             |                                                                        |
| direction               | ingress                                                                |
| ether_type              | IPv4                                                                   |
| id                      | 886f4f4f-74e1-4246-82b6-d97bedc214bb                                   |
| location                | Munch({'cloud': '', 'region_name': '', 'zone': None, 'project': M..... |
| name                    | None                                                                   |
| port_range_max          | 22                                                                     |
| port_range_min          | 22                                                                     |
| project_id              | d3434f55aa5541cfab5f13916da0697d                                       |
| protocol                | tcp                                                                    |
| remote_address_group_id | None                                                                   |
| remote_group_id         | None                                                                   |
| remote_ip_prefix        | 0.0.0.0/0                                                              |
| revision_number         | 0                                                                      |
| security_group_id       | 442b3351-ecff-49be-a48b-c5f36bc906b9                                   |
| tags                    | []                                                                     |
| updated_at              | 2022-04-04T04:40:49Z                                                   |
+-------------------------+------------------------------------------------------------------------+

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

+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| ID                                   | IP Protocol | Ethertype | IP Range  | Port Range | Direction | Remote Security Group | Remote Address Group |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| 43ddb4a5-caa8-4418-b1ce-9d3ac47b2164 | None        | IPv6      | ::/0      |            | egress    | None                  | None                 |
| 4be8aab2-ed86-4f87-b032-4c43695823a4 | None        | IPv4      | 0.0.0.0/0 |            | egress    | None                  | None                 |
| 886f4f4f-74e1-4246-82b6-d97bedc214bb | tcp         | IPv4      | 0.0.0.0/0 | 22:22      | ingress   | None                  | None                 |
| 8d2a4bc7-1a0c-4ec0-b77d-b5522de3b603 | icmp        | IPv4      | 0.0.0.0/0 |            | ingress   | None                  | None                 |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
[5] インスタンスにログインします。
ubuntu@dlp ~(keystone)$
ssh ubuntu@10.0.0.233

The authenticity of host '10.0.0.233 (10.0.0.233)' can't be established.
ECDSA key fingerprint is SHA256:jrIIJCrvZkA/UgYrTvURdsOAD8PA/Xiq7TgyAbzOWYk.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.233' (ECDSA) to the list of known hosts.
Welcome to Ubuntu 20.04.4 LTS (GNU/Linux 5.4.0-105-generic x86_64)

.....
.....

To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

ubuntu@ubuntu-2004:~$     # ログインできた
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