OpenStack Victoria : Neutron ネットワークを構成する (FLAT)2021/03/23 |
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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。
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。
------------+---------------------------+---------------------------+------------
| | |
eth0|10.0.0.30 eth0|10.0.0.50 eth0|10.0.0.51
+-----------+-----------+ +-----------+-----------+ +-----------+-----------+
| [ Control Node ] | | [ Network Node ] | | [ Compute Node ] |
| | | | | |
| MariaDB RabbitMQ | | Open vSwitch | | Libvirt |
| Memcached httpd | | L2 Agent | | Nova Compute |
| Keystone Glance | | L3 Agent | | Open vSwitch |
| Nova API | | Metadata Agent | | L2 Agent |
| Neutron Server | | | | |
| Metadata Agent | | | | |
+-----------------------+ +-----------+-----------+ +-----------+-----------+
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 | 2021-03-23T23:39:42Z | | description | | | dns_domain | None | | id | 11250061-5a23-44f6-8667-2b98f68ef6ab | | 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 | affa3a6446154e37adfd233c437bacc1 | | 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 | 2021-03-23T23:39:42Z | +---------------------------+--------------------------------------+ # [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 $projectID --subnet-range 10.0.0.0/24 \ --allocation-pool start=10.0.0.200,end=10.0.0.254 \ --gateway 10.0.0.1 --dns-nameserver 10.0.0.10 +----------------------+--------------------------------------+ | Field | Value | +----------------------+--------------------------------------+ | allocation_pools | 10.0.0.200-10.0.0.254 | | cidr | 10.0.0.0/24 | | created_at | 2021-03-23T23:40:16Z | | description | | | dns_nameservers | 10.0.0.10 | | dns_publish_fixed_ip | None | | enable_dhcp | True | | gateway_ip | 10.0.0.1 | | host_routes | | | id | bf4a6eb8-15fd-45d3-861a-5bb5761a3ddd | | ip_version | 4 | | ipv6_address_mode | None | | ipv6_ra_mode | None | | name | subnet1 | | network_id | 11250061-5a23-44f6-8667-2b98f68ef6ab | | prefix_length | None | | project_id | affa3a6446154e37adfd233c437bacc1 | | revision_number | 0 | | segment_id | None | | service_types | | | subnetpool_id | None | | tags | | | updated_at | 2021-03-23T23:40:16Z | +----------------------+--------------------------------------+ # 設定確認 [root@dlp ~(keystone)]# openstack network list +--------------------------------------+------------+--------------------------------------+ | ID | Name | Subnets | +--------------------------------------+------------+--------------------------------------+ | 11250061-5a23-44f6-8667-2b98f68ef6ab | sharednet1 | bf4a6eb8-15fd-45d3-861a-5bb5761a3ddd | +--------------------------------------+------------+--------------------------------------+ |
| [3] | 任意のユーザーでログインし、作成したネットワークでインスタンスを作成/起動します。 |
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# 利用可能な [flavor] 確認 [cent@dlp ~(keystone)]$ openstack flavor list +----+----------+------+------+-----------+-------+-----------+ | ID | Name | RAM | Disk | Ephemeral | VCPUs | Is Public | +----+----------+------+------+-----------+-------+-----------+ | 0 | m1.small | 2048 | 10 | 0 | 1 | True | +----+----------+------+------+-----------+-------+-----------+ # 利用可能なイメージ確認 [cent@dlp ~(keystone)]$ openstack image list +--------------------------------------+-----------------+--------+ | ID | Name | Status | +--------------------------------------+-----------------+--------+ | 4d7293af-be5b-471b-9507-2a32f1955b11 | CentOS-Stream-8 | active | +--------------------------------------+-----------------+--------+ # 利用可能なネットワーク確認 [cent@dlp ~(keystone)]$ openstack network list +--------------------------------------+------------+--------------------------------------+ | ID | Name | Subnets | +--------------------------------------+------------+--------------------------------------+ | 11250061-5a23-44f6-8667-2b98f68ef6ab | sharednet1 | bf4a6eb8-15fd-45d3-861a-5bb5761a3ddd | +--------------------------------------+------------+--------------------------------------+ # 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 | 2021-03-23T23:43:12Z | | description | secgroup01 | | id | 716b372a-5059-49f3-8d6b-081693c2975b | | name | secgroup01 | | project_id | f1f04d774d2141fb9acabd28d0e00c33 | | revision_number | 1 | | rules | created_at='2021-03-23T23:43:12Z', direction='egress', ethertype='IPv4... | | | created_at='2021-03-23T23:43:12Z', direction='egress', ethertype='IPv6... | | stateful | True | | tags | [] | | updated_at | 2021-03-23T23:43:12Z | +-----------------+---------------------------------------------------------------------------+ # 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 | +-------------+-------------------------------------------------+ | fingerprint | 55:d4:fe:3c:10:64:1a:21:1d:c8:90:68:94:d3:bf:85 | | name | mykey | | user_id | e08c35de3b6746bd9518c97f7068a71e | +-------------+-------------------------------------------------+[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-Stream-8 --security-group secgroup01 --nic net-id=$netID --key-name mykey CentOS-St-8
openstack server list +--------------------------------------+-------------+--------+-----------------------+-----------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------------------------------+-------------+--------+-----------------------+-----------------+----------+ | bdf8e868-2f58-487e-9a47-54c668ee6973 | CentOS-St-8 | ACTIVE | sharednet1=10.0.0.243 | CentOS-Stream-8 | m1.small | +--------------------------------------+-------------+--------+-----------------------+-----------------+----------+ |
| [4] | 起動した仮想マシンインスタンスに SSH 接続できるように、先に作成したセキュリティグループにポート許可の設定を追加します。 |
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# ICMP 許可 [cent@dlp ~(keystone)]$ openstack security group rule create --protocol icmp --ingress secgroup01 +-------------------+--------------------------------------+ | Field | Value | +-------------------+--------------------------------------+ | created_at | 2021-03-23T23:45:41Z | | description | | | direction | ingress | | ether_type | IPv4 | | id | 80bdbde8-2ee2-4584-bb71-d3e8371d2f85 | | name | None | | port_range_max | None | | port_range_min | None | | project_id | f1f04d774d2141fb9acabd28d0e00c33 | | protocol | icmp | | remote_group_id | None | | remote_ip_prefix | 0.0.0.0/0 | | revision_number | 0 | | security_group_id | 716b372a-5059-49f3-8d6b-081693c2975b | | tags | [] | | updated_at | 2021-03-23T23:45:41Z | +-------------------+--------------------------------------+ # SSH 許可 [cent@dlp ~(keystone)]$ openstack security group rule create --protocol tcp --dst-port 22:22 secgroup01 +-------------------+--------------------------------------+ | Field | Value | +-------------------+--------------------------------------+ | created_at | 2021-03-23T23:45:56Z | | description | | | direction | ingress | | ether_type | IPv4 | | id | 4932a825-526a-4b5b-ad15-dad0582a7be4 | | name | None | | port_range_max | 22 | | port_range_min | 22 | | project_id | f1f04d774d2141fb9acabd28d0e00c33 | | protocol | tcp | | remote_group_id | None | | remote_ip_prefix | 0.0.0.0/0 | | revision_number | 0 | | security_group_id | 716b372a-5059-49f3-8d6b-081693c2975b | | tags | [] | | updated_at | 2021-03-23T23:45:56Z | +-------------------+--------------------------------------+[cent@dlp ~(keystone)]$ openstack security group rule list secgroup01 +--------------------------------------+-------------+-----------+-----------+------------+-----------------------+ | ID | IP Protocol | Ethertype | IP Range | Port Range | Remote Security Group | +--------------------------------------+-------------+-----------+-----------+------------+-----------------------+ | 4932a825-526a-4b5b-ad15-dad0582a7be4 | tcp | IPv4 | 0.0.0.0/0 | 22:22 | None | | a3913fd1-4697-4670-b05f-4a27f76e478e | None | IPv6 | ::/0 | | None | | a6a4cbc9-03e4-4958-9bec-0b46a9eeb5e4 | None | IPv4 | 0.0.0.0/0 | | None | | 80bdbde8-2ee2-4584-bb71-d3e8371d2f85 | icmp | IPv4 | 0.0.0.0/0 | | 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@10.0.0.243 The authenticity of host '10.0.0.245 (10.0.0.245)' can't be established. ECDSA key fingerprint is SHA256:06PHG6VNoJqkt5ea+2984QljuRWWuOekwb91wJvYE3I. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added '10.0.0.245' (ECDSA) to the list of known hosts. Activate the web console with: systemctl enable --now cockpit.socket [centos@centos-st-8 ~]$ # ログインできた |
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