OpenStack Flamingo : Neutron ネットワークを構成 (FLAT)2025/11/20 |
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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。
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。
------------+--------------------------+--------------------------+------------
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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)
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| [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。 |
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# 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 # 227行目 : 追記 [ml2_type_flat]
flat_networks = physnet1
root@network:~#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini # 333行目 : 追記 [ovs]
bridge_mappings = physnet1:br-eth1
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。 |
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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 | 2025-11-20T01:43:41Z | | description | | | dns_domain | None | | id | 291839bd-5239-4068-b14c-a3720959f6c9 | | ipv4_address_scope | None | | ipv6_address_scope | None | | is_default | None | | is_vlan_qinq | None | | is_vlan_transparent | None | | mtu | 1500 | | name | sharednet1 | | port_security_enabled | True | | project_id | 17d8e190750a402d920eedf933aea358 | | 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 | 2025-11-20T01:43:41Z | +---------------------------+--------------------------------------+ # [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 $projectID --subnet-range 10.0.0.0/24 \ --allocation-pool start=10.0.0.200,end=10.0.0.254 \ --gateway 10.0.0.1 --dns-nameserver 10.0.0.10 +----------------------+--------------------------------------+ | Field | Value | +----------------------+--------------------------------------+ | allocation_pools | 10.0.0.200-10.0.0.254 | | cidr | 10.0.0.0/24 | | created_at | 2025-11-20T01:44:11Z | | description | | | dns_nameservers | 10.0.0.10 | | dns_publish_fixed_ip | None | | enable_dhcp | True | | gateway_ip | 10.0.0.1 | | host_routes | | | id | 601b148c-cb5a-4a4f-b78b-3404b97c09f9 | | ip_version | 4 | | ipv6_address_mode | None | | ipv6_ra_mode | None | | name | subnet1 | | network_id | 291839bd-5239-4068-b14c-a3720959f6c9 | | project_id | 17d8e190750a402d920eedf933aea358 | | revision_number | 0 | | router:external | False | | segment_id | None | | service_types | | | subnetpool_id | None | | tags | | | updated_at | 2025-11-20T01:44:11Z | +----------------------+--------------------------------------+ # 設定確認 root@dlp ~(keystone)# openstack network list +--------------------------------+------------+--------------------------------+ | ID | Name | Subnets | +--------------------------------+------------+--------------------------------+ | 291839bd-5239-4068-b14c- | sharednet1 | 601b148c-cb5a-4a4f-b78b- | | a3720959f6c9 | | 3404b97c09f9 | +--------------------------------+------------+--------------------------------+ |
| [3] | 任意のユーザーでログインし、作成したネットワークをインスタンスに関連付けてインスタンスを作成/起動します。 |
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# 利用可能な [flavor] 確認 ubuntu@dlp ~(keystone)$ 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 | m1.large | 16384 | 10 | 0 | 8 | True | | 5 | 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 | +--------------------------------------+------------+--------+ | c8be4fc8-a3f7-4859-9ae7-8b3843baa619 | Ubuntu2404 | active | +--------------------------------------+------------+--------+ # 利用可能なネットワーク確認 ubuntu@dlp ~(keystone)$ openstack network list +--------------------------------+------------+--------------------------------+ | ID | Name | Subnets | +--------------------------------+------------+--------------------------------+ | 291839bd-5239-4068-b14c- | sharednet1 | 601b148c-cb5a-4a4f-b78b- | | a3720959f6c9 | | 3404b97c09f9 | +--------------------------------+------------+--------------------------------+ # 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 | 2025-11-20T01:45:41Z | | description | secgroup01 | | id | 27bea7ad-5949-4295-90fb-9d6158ce6793 | | is_shared | False | | name | secgroup01 | | project_id | b45ce8ac12c749e49e933c84334e79de | | revision_number | 1 | | rules | created_at='2025-11-20T01:45:41Z', direction='egress', | | | ethertype='IPv4', | | | id='ba5190d0-4e3d-417c-bb19-7608c59912e7', | | | standard_attr_id='21', updated_at='2025-11-20T01:45:41Z' | | | created_at='2025-11-20T01:45:41Z', direction='egress', | | | ethertype='IPv6', | | | id='ed28fa35-2283-4642-b6c1-40573b1dc07c', | | | standard_attr_id='20', updated_at='2025-11-20T01:45:41Z' | | stateful | True | | tags | [] | | updated_at | 2025-11-20T01:45:41Z | +-----------------+------------------------------------------------------------+ # 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 | 24:d6:f8:1c:43:7d:e6:40:b3:ad:5f:e6:1a:b8:6a:81 | | id | mykey | | is_deleted | None | | name | mykey | | type | ssh | | user_id | 8fb39b6516284abe94f287d259b160b6 | +-------------+-------------------------------------------------+ubuntu@dlp ~(keystone)$ netID=$(openstack network list | grep sharednet1 | awk '{ print $2 }')
ubuntu@dlp ~(keystone)$
ubuntu@dlp ~(keystone)$ openstack server create --flavor m1.small --image Ubuntu2404 --security-group secgroup01 --nic net-id=$netID --key-name mykey Ubuntu-2404
openstack server list +--------------+-------------+--------+---------------+------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------+-------------+--------+---------------+------------+----------+ | 284ccce3- | Ubuntu-2404 | ACTIVE | sharednet1=10 | Ubuntu2404 | m1.small | | 0fa7-48a1- | | | .0.0.213 | | | | adc8- | | | | | | | 2cead1d51ce1 | | | | | | +--------------+-------------+--------+---------------+------------+----------+ |
| [4] | 起動した仮想マシンインスタンスに SSH 接続できるように、先に作成したセキュリティグループにポート許可の設定を追加します。 |
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# ICMP 許可 ubuntu@dlp ~(keystone)$ openstack security group rule create --protocol icmp --ingress secgroup01 +-------------------------+--------------------------------------+ | Field | Value | +-------------------------+--------------------------------------+ | belongs_to_default_sg | False | | created_at | 2025-11-20T01:47:42Z | | description | | | direction | ingress | | ether_type | IPv4 | | id | ba0edaef-1c1d-4c6a-afce-1ab9bcbd6f14 | | normalized_cidr | 0.0.0.0/0 | | port_range_max | None | | port_range_min | None | | project_id | b45ce8ac12c749e49e933c84334e79de | | 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 | 27bea7ad-5949-4295-90fb-9d6158ce6793 | | updated_at | 2025-11-20T01:47:42Z | +-------------------------+--------------------------------------+ # 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 | 2025-11-20T01:48:00Z | | description | | | direction | ingress | | ether_type | IPv4 | | id | e34e7662-fba2-4f0d-8e19-7570f44289c5 | | normalized_cidr | 0.0.0.0/0 | | port_range_max | 22 | | port_range_min | 22 | | project_id | b45ce8ac12c749e49e933c84334e79de | | 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 | 27bea7ad-5949-4295-90fb-9d6158ce6793 | | updated_at | 2025-11-20T01:48:00Z | +-------------------------+--------------------------------------+ubuntu@dlp ~(keystone)$ openstack security group rule list secgroup01 +----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+ | ID | IP Protocol | Ethertype | IP Range | Port Range | Direction | Remote Security Group | Remote Address Group | +----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+ | ba0edaef | icmp | IPv4 | 0.0.0.0/ | | ingress | None | None | | -1c1d- | | | 0 | | | | | | 4c6a- | | | | | | | | | afce- | | | | | | | | | 1ab9bcbd | | | | | | | | | 6f14 | | | | | | | | | ba5190d0 | None | IPv4 | 0.0.0.0/ | | egress | None | None | | -4e3d- | | | 0 | | | | | | 417c- | | | | | | | | | bb19- | | | | | | | | | 7608c599 | | | | | | | | | 12e7 | | | | | | | | | e34e7662 | tcp | IPv4 | 0.0.0.0/ | 22:22 | ingress | None | None | | -fba2- | | | 0 | | | | | | 4f0d- | | | | | | | | | 8e19- | | | | | | | | | 7570f442 | | | | | | | | | 89c5 | | | | | | | | | ed28fa35 | None | IPv6 | ::/0 | | egress | None | None | | -2283- | | | | | | | | | 4642- | | | | | | | | | b6c1- | | | | | | | | | 40573b1d | | | | | | | | | c07c | | | | | | | | +----------+-------------+-----------+----------+------------+-----------+-----------------------+----------------------+ |
| [5] | インスタンスにログインします。 |
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ubuntu@dlp ~(keystone)$ ssh ubuntu@10.0.0.213 The authenticity of host '10.0.0.213 (10.0.0.213)' can't be established. ED25519 key fingerprint is SHA256:rohPohxhnjg/6RAC0APJk4yjx61RClTadWlKUVKZLjs. This key is not known by any other names. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added '10.0.0.213' (ED25519) to the list of known hosts. Welcome to Ubuntu 24.04.3 LTS (GNU/Linux 6.8.0-87-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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