OpenStack Epoxy : Neutron ネットワークを構成する (FLAT)2025/05/22 |
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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 タイプのプロバイダー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。
------------+--------------------------+--------------------------+------------
| | |
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 # 最終行に追記
[ml2_type_flat]
flat_networks = physnet1
[root@network ~]#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini # 最終行に追記
[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 | 2025-05-22T01:26:47Z | | description | | | dns_domain | None | | id | a6a7181b-4a2b-4638-96c1-c2048ef04254 | | 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 | 03262019a5e54890be53c2fc96ed98d0 | | 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 | 2025-05-22T01:26:47Z | +---------------------------+--------------------------------------+ # [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 $projectID --subnet-range 10.0.0.0/24 \ --allocation-pool start=10.0.0.200,end=10.0.0.254 \ --gateway 10.0.0.1 --dns-nameserver 10.0.0.10 +----------------------+--------------------------------------+ | Field | Value | +----------------------+--------------------------------------+ | allocation_pools | 10.0.0.200-10.0.0.254 | | cidr | 10.0.0.0/24 | | created_at | 2025-05-22T01:27:13Z | | description | | | dns_nameservers | 10.0.0.10 | | dns_publish_fixed_ip | None | | enable_dhcp | True | | gateway_ip | 10.0.0.1 | | host_routes | | | id | 1e7edda0-70ba-4da2-b572-93e62ea03d67 | | ip_version | 4 | | ipv6_address_mode | None | | ipv6_ra_mode | None | | name | subnet1 | | network_id | a6a7181b-4a2b-4638-96c1-c2048ef04254 | | project_id | 03262019a5e54890be53c2fc96ed98d0 | | revision_number | 0 | | router:external | False | | segment_id | None | | service_types | | | subnetpool_id | None | | tags | | | updated_at | 2025-05-22T01:27:13Z | +----------------------+--------------------------------------+ # 設定確認 [root@dlp ~(keystone)]# openstack network list +--------------------------------------+------------+--------------------------------------+ | ID | Name | Subnets | +--------------------------------------+------------+--------------------------------------+ | a6a7181b-4a2b-4638-96c1-c2048ef04254 | sharednet1 | 1e7edda0-70ba-4da2-b572-93e62ea03d67 | +--------------------------------------+------------+--------------------------------------+ |
| [3] | Openstack システムを利用可能な任意のユーザーでログインし、作成したネットワークでインスタンスを作成/起動します。 |
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# 利用可能な [flavor] 確認 [cent@dlp ~(keystone)]$ 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.large | 16384 | 10 | 10 | 8 | True | +----+-----------+-------+------+-----------+-------+-----------+ # 利用可能なイメージ確認 [cent@dlp ~(keystone)]$ openstack image list +--------------------------------------+----------------+--------+ | ID | Name | Status | +--------------------------------------+----------------+--------+ | 8bbf2495-d1b0-4c12-89d3-bf6ca71b2a2d | CentOS-Stream9 | active | +--------------------------------------+----------------+--------+ # 利用可能なネットワーク確認 [cent@dlp ~(keystone)]$ openstack network list +--------------------------------------+------------+--------------------------------------+ | ID | Name | Subnets | +--------------------------------------+------------+--------------------------------------+ | a6a7181b-4a2b-4638-96c1-c2048ef04254 | sharednet1 | 1e7edda0-70ba-4da2-b572-93e62ea03d67 | +--------------------------------------+------------+--------------------------------------+ # インスタンス用のセキュリティグループを作成 [cent@dlp ~(keystone)]$ openstack security group create secgroup01 +-----------------+----------------------------------------------------------------------------+ | Field | Value | +-----------------+----------------------------------------------------------------------------+ | created_at | 2025-05-22T01:28:43Z | | description | secgroup01 | | id | 9d815817-44f8-414a-b02e-d314e481bdaa | | name | secgroup01 | | project_id | 6cd379304e2447da8514a66bb6cdfda5 | | revision_number | 1 | | rules | created_at='2025-05-22T01:28:43Z', direction='egress', ethertype='IPv4'... | | | created_at='2025-05-22T01:28:43Z', direction='egress', ethertype='IPv6'... | | shared | False | | stateful | True | | tags | [] | | updated_at | 2025-05-22T01:28:43Z | +-----------------+----------------------------------------------------------------------------+ # インスタンス接続用の SSH キーペア作成 [cent@dlp ~(keystone)]$ ssh-keygen -q -N "" Enter file in which to save the key (/home/cent/.ssh/id_rsa): # 公開鍵登録 [cent@dlp ~(keystone)]$ openstack keypair create --public-key ~/.ssh/id_rsa.pub mykey +-------------+-------------------------------------------------+ | Field | Value | +-------------+-------------------------------------------------+ | created_at | None | | fingerprint | 35:95:78:3a:58:27:a7:93:4f:14:52:41:07:97:af:cc | | id | mykey | | is_deleted | None | | name | mykey | | type | ssh | | user_id | b6e98dc2822541dd8c4571ac4ed54778 | +-------------+-------------------------------------------------+[cent@dlp ~(keystone)]$ netID=$(openstack network list | grep sharednet1 | awk '{ print $2 }')
[cent@dlp ~(keystone)]$
[cent@dlp ~(keystone)]$ openstack server create --flavor m1.small --image CentOS-Stream9 --security-group secgroup01 --nic net-id=$netID --key-name mykey CentOS-9
openstack server list +--------------------------------------+----------+--------+-----------------------+----------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------------------------------+----------+--------+-----------------------+----------------+----------+ | dc02d0f9-b587-4866-a577-c432cde87a91 | CentOS-9 | ACTIVE | sharednet1=10.0.0.209 | CentOS-Stream9 | m1.small | +--------------------------------------+----------+--------+-----------------------+----------------+----------+ |
| [4] | 起動した仮想マシンインスタンスに SSH 接続できるように、先に作成したセキュリティグループにポート許可の設定を追加します。 |
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# ICMP 許可 [cent@dlp ~(keystone)]$ openstack security group rule create --protocol icmp --ingress secgroup01 +-------------------------+--------------------------------------+ | Field | Value | +-------------------------+--------------------------------------+ | belongs_to_default_sg | False | | created_at | 2025-05-22T01:31:35Z | | description | | | direction | ingress | | ether_type | IPv4 | | id | e8488851-7c9a-45a9-8652-288ebe7d4c87 | | name | None | | normalized_cidr | 0.0.0.0/0 | | port_range_max | None | | port_range_min | None | | project_id | 6cd379304e2447da8514a66bb6cdfda5 | | 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 | 9d815817-44f8-414a-b02e-d314e481bdaa | | tags | [] | | updated_at | 2025-05-22T01:31:35Z | +-------------------------+--------------------------------------+ # SSH 許可 [cent@dlp ~(keystone)]$ openstack security group rule create --protocol tcp --dst-port 22:22 secgroup01 +-------------------------+--------------------------------------+ | Field | Value | +-------------------------+--------------------------------------+ | belongs_to_default_sg | False | | created_at | 2025-05-22T01:31:50Z | | description | | | direction | ingress | | ether_type | IPv4 | | id | 2d1d4d1e-a69f-4e59-95dd-ba07e2c583a7 | | name | None | | normalized_cidr | 0.0.0.0/0 | | port_range_max | 22 | | port_range_min | 22 | | project_id | 6cd379304e2447da8514a66bb6cdfda5 | | 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 | 9d815817-44f8-414a-b02e-d314e481bdaa | | tags | [] | | updated_at | 2025-05-22T01:31:50Z | +-------------------------+--------------------------------------+[cent@dlp ~(keystone)]$ openstack security group rule list secgroup01 +--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+ | ID | IP Protocol | Ethertype | IP Range | Port Range | Direction | Remote Security Group | Remote Address Group | +--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+ | 2d1d4d1e-a69f-4e59-95dd-ba07e2c583a7 | tcp | IPv4 | 0.0.0.0/0 | 22:22 | ingress | None | None | | 55c2f63a-1b77-44ef-84bc-e51689e8e964 | None | IPv4 | 0.0.0.0/0 | | egress | None | None | | ccf5dea0-755e-4337-9cba-7f8f8f282471 | None | IPv6 | ::/0 | | egress | None | None | | e8488851-7c9a-45a9-8652-288ebe7d4c87 | icmp | IPv4 | 0.0.0.0/0 | | ingress | None | None | +--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+ |
| [5] | インスタンスにログインします。 |
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[cent@dlp ~(keystone)]$ ssh centos@10.0.0.209 The authenticity of host '10.0.0.209 (10.0.0.209)' can't be established. ED25519 key fingerprint is SHA256:iHk+BEak2Ig7FjbYutM9pQ6UYhj92+nZ3gwqD2t2k/4. This key is not known by any other names Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added '10.0.0.209' (ED25519) to the list of known hosts. [centos@centos-9 ~]$ # ログインできた |
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