Ubuntu 20.04
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OpenStack Wallaby : Neutron ネットワークを構成 (FLAT)2021/04/18

 
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
# 257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

+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | UP                                   |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2021-04-15T07:33:14Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | e7a048a3-a03b-407a-b8e2-3edc8d2b8017 |
| 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                | b1f2e1bdf6fb4e03bb30ef3b90764d3b     |
| 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                | 2021-04-15T07:33:14Z                 |
+---------------------------+--------------------------------------+

# [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           | 2021-04-15T07:33:35Z                 |
| description          |                                      |
| dns_nameservers      | 10.0.0.10                            |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           | 10.0.0.1                             |
| host_routes          |                                      |
| id                   | bbf5283b-e0ae-4308-9896-a3d1e45a2413 |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | subnet1                              |
| network_id           | e7a048a3-a03b-407a-b8e2-3edc8d2b8017 |
| prefix_length        | None                                 |
| project_id           | b1f2e1bdf6fb4e03bb30ef3b90764d3b     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2021-04-15T07:33:35Z                 |
+----------------------+--------------------------------------+

# 設定確認

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| e7a048a3-a03b-407a-b8e2-3edc8d2b8017 | sharednet1 | bbf5283b-e0ae-4308-9896-a3d1e45a2413 |
+--------------------------------------+------------+--------------------------------------+
[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 |
+--------------------------------------+------------+--------+
| 8df08a02-7c19-465e-8862-53eb2319918d | Ubuntu2004 | active |
+--------------------------------------+------------+--------+

# 利用可能なネットワーク確認

ubuntu@dlp ~(keystone)$
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| e7a048a3-a03b-407a-b8e2-3edc8d2b8017 | sharednet1 | bbf5283b-e0ae-4308-9896-a3d1e45a2413 |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2021-04-15T07:36:16Z                                                     |
| description     | secgroup01                                                               |
| id              | 09c7cc13-cb05-45db-ad64-e28d87cb0f91                                     |
| name            | secgroup01                                                               |
| project_id      | e256a7323fda468fb02e8f1975fce488                                         |
| revision_number | 1                                                                        |
| rules           | created_at='2021-04-15T07:36:16Z', direction='egress', ethertype='IPv4.. |
|                 | created_at='2021-04-15T07:36:16Z', direction='egress', ethertype='IPv6.. |
| stateful        | True                                                                     |
| tags            | []                                                                       |
| updated_at      | 2021-04-15T07:36:16Z                                                     |
+-----------------+--------------------------------------------------------------------------+

# 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 | 58:46:ea:a5:fa:ce:c0:43:ae:ff:b1:1d:65:ce:4c:fc |
| id          | mykey                                           |
| is_deleted  | None                                            |
| name        | mykey                                           |
| type        | ssh                                             |
| user_id     | 3ebb8ec1b4fc467da96379caef902df7                |
+-------------+-------------------------------------------------+

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   |
+--------------------------------------+-------------+--------+-----------------------+------------+----------+
| b06bcd4d-8cf1-42ea-b8f4-4f60d9729ece | Ubuntu-2004 | ACTIVE | sharednet1=10.0.0.237 | 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              | 2021-04-15T07:41:47Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | a0b28ea4-8056-417a-95d1-f87962ffe3b2 |
| name                    | None                                 |
| port_range_max          | None                                 |
| port_range_min          | None                                 |
| project_id              | e256a7323fda468fb02e8f1975fce488     |
| 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       | 09c7cc13-cb05-45db-ad64-e28d87cb0f91 |
| tags                    | []                                   |
| updated_at              | 2021-04-15T07:41:47Z                 |
+-------------------------+--------------------------------------+

# SSH 許可

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

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| created_at              | 2021-04-15T07:42:00Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | eb98407a-0b57-43cc-b37d-9964bd362d6f |
| name                    | None                                 |
| port_range_max          | 22                                   |
| port_range_min          | 22                                   |
| project_id              | e256a7323fda468fb02e8f1975fce488     |
| 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       | 09c7cc13-cb05-45db-ad64-e28d87cb0f91 |
| tags                    | []                                   |
| updated_at              | 2021-04-15T07:42:00Z                 |
+-------------------------+--------------------------------------+

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

+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| ID                                   | IP Protocol | Ethertype | IP Range  | Port Range | Direction | Remote Security Group | Remote Address Group |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| 6661176f-293d-420e-847b-3b98e4a40796 | None        | IPv6      | ::/0      |            | egress    | None                  | None                 |
| a0b28ea4-8056-417a-95d1-f87962ffe3b2 | icmp        | IPv4      | 0.0.0.0/0 |            | ingress   | None                  | None                 |
| d3bcc17b-1b90-43fc-a5b0-c2a0f738016a | None        | IPv4      | 0.0.0.0/0 |            | egress    | None                  | None                 |
| eb98407a-0b57-43cc-b37d-9964bd362d6f | 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@10.0.0.237

The authenticity of host '10.0.0.237 (10.0.0.237)' can't be established.
ECDSA key fingerprint is SHA256:4oXoVAlEm21TG4vDS7O+cYhE3OW4nDY8ImwG97SCJjo.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.237' (ECDSA) to the list of known hosts.
Welcome to Ubuntu 20.04.2 LTS (GNU/Linux 5.4.0-71-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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