Ubuntu 22.04
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OpenStack Zed : Neutron ネットワークを構成 (FLAT)
2022/10/07
 
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
+-----------+-----------+     +-----------+-----------+     +-----------+-----------+
|   [ 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     |     |                       |     |    Neutron L2 Agent   |
|  Glance     Nova API  |     |                       |     |                       |
|  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。
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                | 2022-10-07T05:36:53Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | 07837f59-a1e0-4aaf-8181-0fffa01e79af |
| 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                | ee51c09c765e4a4d958c2bcc4dbb5665     |
| 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                | 2022-10-07T05:36:53Z                 |
+---------------------------+--------------------------------------+

# [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           | 2022-10-07T05:38:04Z                 |
| description          |                                      |
| dns_nameservers      | 10.0.0.10                            |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           | 10.0.0.1                             |
| host_routes          |                                      |
| id                   | d54d694a-1642-4792-9f09-5a8e97e51fda |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | subnet1                              |
| network_id           | 07837f59-a1e0-4aaf-8181-0fffa01e79af |
| project_id           | ee51c09c765e4a4d958c2bcc4dbb5665     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2022-10-07T05:38:04Z                 |
+----------------------+--------------------------------------+

# 設定確認

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 07837f59-a1e0-4aaf-8181-0fffa01e79af | sharednet1 | d54d694a-1642-4792-9f09-5a8e97e51fda |
+--------------------------------------+------------+--------------------------------------+
[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 |
+--------------------------------------+------------+--------+
| 126bc335-fc00-478d-b84a-a9e79eba2574 | Ubuntu2204 | active |
+--------------------------------------+------------+--------+

# 利用可能なネットワーク確認

ubuntu@dlp ~(keystone)$
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 07837f59-a1e0-4aaf-8181-0fffa01e79af | sharednet1 | d54d694a-1642-4792-9f09-5a8e97e51fda |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2022-10-07T05:39:59Z                                                     |
| description     | secgroup01                                                               |
| id              | 8ddab0a7-58aa-4bb2-bb9a-a20793007220                                     |
| name            | secgroup01                                                               |
| project_id      | 4dd1e1f6bac441ff9c77002c3ab4c58a                                         |
| revision_number | 1                                                                        |
| rules           | created_at='2022-10-07T05:39:59Z', direction='egress', ethertype='I..... |
|                 | created_at='2022-10-07T05:39:59Z', direction='egress', ethertype='I..... |
| stateful        | True                                                                     |
| tags            | []                                                                       |
| updated_at      | 2022-10-07T05:39:59Z                                                     |
+-----------------+--------------------------------------------------------------------------+

# 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 | 9a:88:ae:46:d9:9a:74:19:69:b8:61:17:75:26:20:f9 |
| id          | mykey                                           |
| is_deleted  | None                                            |
| name        | mykey                                           |
| type        | ssh                                             |
| user_id     | 9345b7f4de21427abf31ad308cf952f8                |
+-------------+-------------------------------------------------+

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   |
+--------------------------------------+-------------+--------+-----------------------+------------+----------+
| f1df6a01-9306-4af8-9931-128e8e3e42e0 | Ubuntu-2204 | ACTIVE | sharednet1=10.0.0.208 | Ubuntu2204 | 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              | 2022-10-07T05:42:27Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | 7d6c7668-c055-4691-b931-68a2a6d792a9 |
| name                    | None                                 |
| port_range_max          | None                                 |
| port_range_min          | None                                 |
| project_id              | 4dd1e1f6bac441ff9c77002c3ab4c58a     |
| 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       | 8ddab0a7-58aa-4bb2-bb9a-a20793007220 |
| tags                    | []                                   |
| updated_at              | 2022-10-07T05:42:27Z                 |
+-------------------------+--------------------------------------+

# SSH 許可

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

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| created_at              | 2022-10-07T05:42:46Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | bc4790c9-aafc-4651-9c78-350f29ee6463 |
| name                    | None                                 |
| port_range_max          | 22                                   |
| port_range_min          | 22                                   |
| project_id              | 4dd1e1f6bac441ff9c77002c3ab4c58a     |
| 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       | 8ddab0a7-58aa-4bb2-bb9a-a20793007220 |
| tags                    | []                                   |
| updated_at              | 2022-10-07T05:42:46Z                 |
+-------------------------+--------------------------------------+

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

+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| ID                                   | IP Protocol | Ethertype | IP Range  | Port Range | Direction | Remote Security Group | Remote Address Group |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| 19ffb07f-89ac-42ef-95a0-a584c39392d2 | None        | IPv4      | 0.0.0.0/0 |            | egress    | None                  | None                 |
| 4775c9aa-d814-4313-97d0-f316d19dda62 | None        | IPv6      | ::/0      |            | egress    | None                  | None                 |
| 7d6c7668-c055-4691-b931-68a2a6d792a9 | icmp        | IPv4      | 0.0.0.0/0 |            | ingress   | None                  | None                 |
| bc4790c9-aafc-4651-9c78-350f29ee6463 | tcp         | IPv4      | 0.0.0.0/0 | 22:22      | ingress   | None                  | None                 |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
[5] インスタンスにログインします。
ubuntu@dlp ~(keystone)$
ssh ubuntu@10.0.0.208

The authenticity of host '10.0.0.208 (10.0.0.208)' can't be established.
ED25519 key fingerprint is SHA256:EPu4ndeBBJ5Py2PdOuM4dKYA1s9WQaWCDAOhyn6txXk.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.208' (ED25519) to the list of known hosts.
Welcome to Ubuntu 22.04.1 LTS (GNU/Linux 5.15.0-48-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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