Ubuntu 24.04
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OpenStack Caracal : Neutron ネットワークを構成 (FLAT)2024/05/21

 

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

------------+--------------------------+--------------------------+------------
            |                          |                          |
        eth0|10.0.0.30             eth0|10.0.0.50             eth0|10.0.0.51
+-----------+-----------+  +-----------+-----------+  +-----------+-----------+
|   [ dlp.srv.world ]   |  | [ network.srv.world ] |  |  [ node01.srv.world ] |
|     (Control Node)    |  |     (Network Node)    |  |     (Compute Node)    |
|                       |  |                       |  |                       |
|  MariaDB    RabbitMQ  |  |  Neutron L2/L3 Agent  |  |        Libvirt        |
|  Memcached  Nginx     |  |   Neutron Metadata    |  |      Nova Compute     |
|  Keystone   httpd     |  |     Open vSwitch      |  |    Neutron L2 Agent   |
|  Glance     Nova API  |  |                       |  |      Open vSwitch     |
|  Neutron Server       |  |                       |  |                       |
|  Neutron Metadata     |  |                       |  |                       |
+-----------------------+  +-----------+-----------+  +-----------+-----------+
                                   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。
# ブリッジ追加

root@network:~#
ovs-vsctl add-br br-eth1
# 追加したブリッジのポートに [eth1] を追加
# [eth1] は環境によって異なるため自身の名称に置き換え

root@network:~#
ovs-vsctl add-port br-eth1 eth1
root@network:~#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# 219行目 : 追記

[ml2_type_flat]
flat_networks = physnet1
root@network:~#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# 302行目 : 追記

[ovs]
bridge_mappings = physnet1:br-eth1
root@network:~#
systemctl restart neutron-openvswitch-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                | 2024-05-21T06:48:16Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | 9b1bde5c-6671-455e-bd14-ab662ee56f89 |
| 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                | ab9749e59bdb48e4807a18abb83c9f99     |
| 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                      |                                      |
| tenant_id                 | ab9749e59bdb48e4807a18abb83c9f99     |
| updated_at                | 2024-05-21T06:48:16Z                 |
+---------------------------+--------------------------------------+

# [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           | 2024-05-21T06:48:46Z                 |
| description          |                                      |
| dns_nameservers      | 10.0.0.10                            |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           | 10.0.0.1                             |
| host_routes          |                                      |
| id                   | bcfd4b7f-baf7-472f-baaa-b30805f21459 |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | subnet1                              |
| network_id           | 9b1bde5c-6671-455e-bd14-ab662ee56f89 |
| project_id           | ab9749e59bdb48e4807a18abb83c9f99     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2024-05-21T06:48:46Z                 |
+----------------------+--------------------------------------+

# 設定確認

root@dlp ~(keystone)#
openstack network list

+--------------------------------+------------+--------------------------------+
| ID                             | Name       | Subnets                        |
+--------------------------------+------------+--------------------------------+
| 9b1bde5c-6671-455e-bd14-       | sharednet1 | bcfd4b7f-baf7-472f-baaa-       |
| ab662ee56f89                   |            | b30805f21459                   |
+--------------------------------+------------+--------------------------------+
[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 |
+----+-----------+------+------+-----------+-------+-----------+
| 1  | m1.tiny   | 2048 |   10 |         0 |     1 | True      |
| 2  | m1.small  | 4096 |   10 |         0 |     2 | True      |
| 3  | m1.medium | 8192 |   10 |         0 |     4 | True      |
| 4  | m2.medium | 8192 |   10 |        10 |     4 | True      |
+----+-----------+------+------+-----------+-------+-----------+

# 利用可能なイメージ確認

ubuntu@dlp ~(keystone)$
openstack image list

+--------------------------------------+------------+--------+
| ID                                   | Name       | Status |
+--------------------------------------+------------+--------+
| 7620a182-99f2-4132-9c6e-4b2da962b241 | Ubuntu2404 | active |
+--------------------------------------+------------+--------+

# 利用可能なネットワーク確認

ubuntu@dlp ~(keystone)$
openstack network list

+--------------------------------+------------+--------------------------------+
| ID                             | Name       | Subnets                        |
+--------------------------------+------------+--------------------------------+
| 9b1bde5c-6671-455e-bd14-       | sharednet1 | bcfd4b7f-baf7-472f-baaa-       |
| ab662ee56f89                   |            | b30805f21459                   |
+--------------------------------+------------+--------------------------------+

# 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      | 2024-05-21T06:51:23Z                                       |
| description     | secgroup01                                                 |
| id              | a7489a36-5a3c-47a6-9d97-7e09d2707004                       |
| name            | secgroup01                                                 |
| project_id      | 18ede7365bdc430093e8fd4a90f77369                           |
| revision_number | 1                                                          |
| rules           | created_at='2024-05-21T06:51:23Z', direction='egress',     |
|                 | ethertype='IPv6',                                          |
|                 | id='43129404-8e03-4b29-a19e-d438cc9bca67',                 |
|                 | standard_attr_id='20', updated_at='2024-05-21T06:51:23Z'   |
|                 | created_at='2024-05-21T06:51:23Z', direction='egress',     |
|                 | ethertype='IPv4',                                          |
|                 | id='8088bea8-9608-4264-971e-d8398ffe0863',                 |
|                 | standard_attr_id='21', updated_at='2024-05-21T06:51:23Z'   |
| shared          | False                                                      |
| stateful        | True                                                       |
| tags            | []                                                         |
| updated_at      | 2024-05-21T06:51:23Z                                       |
+-----------------+------------------------------------------------------------+

# 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_ed25519):
# 公開鍵登録

ubuntu@dlp ~(keystone)$
openstack keypair create --public-key ~/.ssh/id_ed25519.pub mykey

+-------------+-------------------------------------------------+
| Field       | Value                                           |
+-------------+-------------------------------------------------+
| created_at  | None                                            |
| fingerprint | 09:d5:f0:34:e3:d0:90:c2:28:74:98:01:1f:ea:76:cc |
| id          | mykey                                           |
| is_deleted  | None                                            |
| name        | mykey                                           |
| type        | ssh                                             |
| user_id     | b9371d015e0d43dca74f29161448ffd2                |
+-------------+-------------------------------------------------+

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

ubuntu@dlp ~(keystone)$
openstack server create --flavor m1.small --image Ubuntu2404 --security-group secgroup01 --nic net-id=$netID --key-name mykey Ubuntu-2404
ubuntu@dlp ~(keystone)$
openstack server list

+--------------+-------------+--------+---------------+------------+----------+
| ID           | Name        | Status | Networks      | Image      | Flavor   |
+--------------+-------------+--------+---------------+------------+----------+
| 314d9a1b-    | Ubuntu-2404 | ACTIVE | sharednet1=10 | Ubuntu2404 | m1.small |
| f50e-40b3-   |             |        | .0.0.212      |            |          |
| 8e94-        |             |        |               |            |          |
| 91eba3ba5d70 |             |        |               |            |          |
+--------------+-------------+--------+---------------+------------+----------+
[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                                |
+-------------------------+--------------------------------------+
| belongs_to_default_sg   | False                                |
| created_at              | 2024-05-21T06:55:08Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | c2495ff4-cae1-4390-b555-6ba79e1ba778 |
| name                    | None                                 |
| normalized_cidr         | 0.0.0.0/0                            |
| port_range_max          | None                                 |
| port_range_min          | None                                 |
| project_id              | 18ede7365bdc430093e8fd4a90f77369     |
| 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       | a7489a36-5a3c-47a6-9d97-7e09d2707004 |
| tags                    | []                                   |
| updated_at              | 2024-05-21T06:55:08Z                 |
+-------------------------+--------------------------------------+

# SSH 許可

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

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| belongs_to_default_sg   | False                                |
| created_at              | 2024-05-21T06:55:35Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | 2a54b381-dd4e-4f53-a843-1ae6699e653c |
| name                    | None                                 |
| normalized_cidr         | 0.0.0.0/0                            |
| port_range_max          | 22                                   |
| port_range_min          | 22                                   |
| project_id              | 18ede7365bdc430093e8fd4a90f77369     |
| 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       | a7489a36-5a3c-47a6-9d97-7e09d2707004 |
| tags                    | []                                   |
| updated_at              | 2024-05-21T06:55:35Z                 |
+-------------------------+--------------------------------------+

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

+----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+
| ID       | IP Protocol | Ethertype | IP Range | Port Range | Direction | Remote Security Group | Remote Address Group |
+----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+
| 2a54b381 | tcp         | IPv4      | 0.0.0.0/ | 22:22      | ingress   | None                  | None                 |
| -dd4e-   |             |           | 0        |            |           |                       |                      |
| 4f53-    |             |           |          |            |           |                       |                      |
| a843-    |             |           |          |            |           |                       |                      |
| 1ae6699e |             |           |          |            |           |                       |                      |
| 653c     |             |           |          |            |           |                       |                      |
| 43129404 | None        | IPv6      | ::/0     |            | egress    | None                  | None                 |
| -8e03-   |             |           |          |            |           |                       |                      |
| 4b29-    |             |           |          |            |           |                       |                      |
| a19e-    |             |           |          |            |           |                       |                      |
| d438cc9b |             |           |          |            |           |                       |                      |
| ca67     |             |           |          |            |           |                       |                      |
| 8088bea8 | None        | IPv4      | 0.0.0.0/ |            | egress    | None                  | None                 |
| -9608-   |             |           | 0        |            |           |                       |                      |
| 4264-    |             |           |          |            |           |                       |                      |
| 971e-    |             |           |          |            |           |                       |                      |
| d8398ffe |             |           |          |            |           |                       |                      |
| 0863     |             |           |          |            |           |                       |                      |
| c2495ff4 | icmp        | IPv4      | 0.0.0.0/ |            | ingress   | None                  | None                 |
| -cae1-   |             |           | 0        |            |           |                       |                      |
| 4390-    |             |           |          |            |           |                       |                      |
| b555-    |             |           |          |            |           |                       |                      |
| 6ba79e1b |             |           |          |            |           |                       |                      |
| a778     |             |           |          |            |           |                       |                      |
+----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+
[5] インスタンスにログインします。
ubuntu@dlp ~(keystone)$
ssh ubuntu@10.0.0.212

The authenticity of host '10.0.0.212 (10.0.0.212)' can't be established.
ED25519 key fingerprint is SHA256:jqdqp/JwCSgi78lgCw8XMYVd7d1p3VApbZQpT1mX1iw.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.212' (ED25519) to the list of known hosts.
Welcome to Ubuntu 24.04 LTS (GNU/Linux 6.8.0-31-generic x86_64)

.....
.....

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

ubuntu@ubuntu-2404:~$     # ログインできた
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