Ubuntu 22.04
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OpenStack Caracal : Neutron ネットワークを構成 (FLAT)2024/04/08

 
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
# 218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                | 2024-04-08T04:26:55Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | 8e56d24d-87c6-4064-926c-f2cf17f16888 |
| 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                | c8fe37b15914498993f4222c1be9342f     |
| 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                 | c8fe37b15914498993f4222c1be9342f     |
| updated_at                | 2024-04-08T04:26:55Z                 |
+---------------------------+--------------------------------------+

# [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           | 2024-04-08T04:27:18Z                 |
| description          |                                      |
| dns_nameservers      | 10.0.0.10                            |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           | 10.0.0.1                             |
| host_routes          |                                      |
| id                   | 7f5b72de-a9a1-40d1-b53d-ccbe424a9c23 |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | subnet1                              |
| network_id           | 8e56d24d-87c6-4064-926c-f2cf17f16888 |
| project_id           | c8fe37b15914498993f4222c1be9342f     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2024-04-08T04:27:18Z                 |
+----------------------+--------------------------------------+

# 設定確認

root@dlp ~(keystone)#
openstack network list

+--------------------------------+------------+--------------------------------+
| ID                             | Name       | Subnets                        |
+--------------------------------+------------+--------------------------------+
| 8e56d24d-87c6-4064-926c-       | sharednet1 | 7f5b72de-a9a1-40d1-b53d-       |
| f2cf17f16888                   |            | ccbe424a9c23                   |
+--------------------------------+------------+--------------------------------+
[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.large | 8192 |   10 |         0 |     4 | True      |
| 4  | m2.large | 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 |
+--------------------------------------+------------+--------+
| 855cee7b-5ced-495e-9e75-48117212a310 | Ubuntu2204 | active |
+--------------------------------------+------------+--------+

# 利用可能なネットワーク確認

ubuntu@dlp ~(keystone)$
openstack network list

+--------------------------------+------------+--------------------------------+
| ID                             | Name       | Subnets                        |
+--------------------------------+------------+--------------------------------+
| 8e56d24d-87c6-4064-926c-       | sharednet1 | 7f5b72de-a9a1-40d1-b53d-       |
| f2cf17f16888                   |            | ccbe424a9c23                   |
+--------------------------------+------------+--------------------------------+

# 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      | 2024-04-08T04:29:23Z                                       |
| description     | secgroup01                                                 |
| id              | 5f634717-8f1d-4907-9dd6-729454d76e8b                       |
| name            | secgroup01                                                 |
| project_id      | caf4551824d8499c984a70fc038b32e3                           |
| revision_number | 1                                                          |
| rules           | created_at='2024-04-08T04:29:23Z', direction='egress',     |
|                 | ethertype='IPv6',                                          |
|                 | id='7d42a829-b075-4e2e-bb0a-f4248031273e',                 |
|                 | standard_attr_id='21', updated_at='2024-04-08T04:29:23Z'   |
|                 | created_at='2024-04-08T04:29:23Z', direction='egress',     |
|                 | ethertype='IPv4',                                          |
|                 | id='893532f2-2fc9-43c1-b81e-e4aee7e10b1e',                 |
|                 | standard_attr_id='20', updated_at='2024-04-08T04:29:23Z'   |
| shared          | False                                                      |
| stateful        | True                                                       |
| tags            | []                                                         |
| updated_at      | 2024-04-08T04:29:23Z                                       |
+-----------------+------------------------------------------------------------+

# 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_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 | 58:18:a6:19:45:50:99:ae:7d:3f:7c:ea:8b:d9:63:c7 |
| id          | mykey                                           |
| is_deleted  | None                                            |
| name        | mykey                                           |
| type        | ssh                                             |
| user_id     | fbbb44f2e3d440c581966f6c1cdbc359                |
+-------------+-------------------------------------------------+

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

ubuntu@dlp ~(keystone)$
openstack server create --flavor m1.small --image Ubuntu2204 --security-group secgroup01 --nic net-id=$netID --key-name mykey Ubuntu-2204
ubuntu@dlp ~(keystone)$
openstack server list

+--------------+-------------+--------+---------------+------------+----------+
| ID           | Name        | Status | Networks      | Image      | Flavor   |
+--------------+-------------+--------+---------------+------------+----------+
| af2c8aa2-    | Ubuntu-2204 | ACTIVE | sharednet1=10 | Ubuntu2204 | m1.small |
| f905-4aa4-   |             |        | .0.0.218      |            |          |
| a95e-        |             |        |               |            |          |
| 4af4c8015511 |             |        |               |            |          |
+--------------+-------------+--------+---------------+------------+----------+
[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              | 2024-04-08T04:31:44Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | 8c256545-d6c2-4cad-b89d-aafd15871cbb |
| name                    | None                                 |
| normalized_cidr         | 0.0.0.0/0                            |
| port_range_max          | None                                 |
| port_range_min          | None                                 |
| project_id              | caf4551824d8499c984a70fc038b32e3     |
| 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       | 5f634717-8f1d-4907-9dd6-729454d76e8b |
| tags                    | []                                   |
| updated_at              | 2024-04-08T04:31:44Z                 |
+-------------------------+--------------------------------------+

# 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              | 2024-04-08T04:32:00Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | dc98e423-39cc-4fac-a352-66e71ec71a47 |
| name                    | None                                 |
| normalized_cidr         | 0.0.0.0/0                            |
| port_range_max          | 22                                   |
| port_range_min          | 22                                   |
| project_id              | caf4551824d8499c984a70fc038b32e3     |
| 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       | 5f634717-8f1d-4907-9dd6-729454d76e8b |
| tags                    | []                                   |
| updated_at              | 2024-04-08T04:32:00Z                 |
+-------------------------+--------------------------------------+

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

+----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+
| ID       | IP Protocol | Ethertype | IP Range | Port Range | Direction | Remote Security Group | Remote Address Group |
+----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+
| 7d42a829 | None        | IPv6      | ::/0     |            | egress    | None                  | None                 |
| -b075-   |             |           |          |            |           |                       |                      |
| 4e2e-    |             |           |          |            |           |                       |                      |
| bb0a-    |             |           |          |            |           |                       |                      |
| f4248031 |             |           |          |            |           |                       |                      |
| 273e     |             |           |          |            |           |                       |                      |
| 893532f2 | None        | IPv4      | 0.0.0.0/ |            | egress    | None                  | None                 |
| -2fc9-   |             |           | 0        |            |           |                       |                      |
| 43c1-    |             |           |          |            |           |                       |                      |
| b81e-    |             |           |          |            |           |                       |                      |
| e4aee7e1 |             |           |          |            |           |                       |                      |
| 0b1e     |             |           |          |            |           |                       |                      |
| 8c256545 | icmp        | IPv4      | 0.0.0.0/ |            | ingress   | None                  | None                 |
| -d6c2-   |             |           | 0        |            |           |                       |                      |
| 4cad-    |             |           |          |            |           |                       |                      |
| b89d-    |             |           |          |            |           |                       |                      |
| aafd1587 |             |           |          |            |           |                       |                      |
| 1cbb     |             |           |          |            |           |                       |                      |
| dc98e423 | tcp         | IPv4      | 0.0.0.0/ | 22:22      | ingress   | None                  | None                 |
| -39cc-   |             |           | 0        |            |           |                       |                      |
| 4fac-    |             |           |          |            |           |                       |                      |
| a352-    |             |           |          |            |           |                       |                      |
| 66e71ec7 |             |           |          |            |           |                       |                      |
| 1a47     |             |           |          |            |           |                       |                      |
+----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+
[5] インスタンスにログインします。
ubuntu@dlp ~(keystone)$
ssh ubuntu@10.0.0.218

The authenticity of host '10.0.0.218 (10.0.0.218)' can't be established.
ED25519 key fingerprint is SHA256:x6WknsNUGV6TBI6XtqUVeogLuVtFprENW9nCYtIAjSs.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.218' (ED25519) to the list of known hosts.
Welcome to Ubuntu 22.04.4 LTS (GNU/Linux 5.15.0-101-generic x86_64)

.....
.....

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

ubuntu@ubuntu-2204:~$     # ログインできた
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