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OpenStack Yoga : Neutron ネットワークを構成する (FLAT)2022/05/31

 
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
+-----------+-----------+     +-----------+-----------+     +-----------+-----------+
|   [ dlp.srv.world ]   |     | [ network.srv.world ] |     |  [ node01.srv.world ] |
|     (Control Node)    |     |     (Network Node)    |     |     (Compute Node)    |
|                       |     |                       |     |                       |
|  MariaDB    RabbitMQ  |     |  Neutron L2/L3 Agent  |     |        Libvirt        |
|  Memcached  httpd     |     |   Neutron Metadata    |     |      Nova Compute     |
|  Keystone   Glance    |     |     Open vSwitch      |     |    Neutron L2 Agent   |
|  Nova API             |     |                       |     |      Open vSwitch     |
|  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。
# 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
[root@network ~]#
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。
[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                | 2022-05-31T09:39:27Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | 9b05bd89-ff99-4ed5-83ca-afe3675e55b0 |
| 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                | 8787527217494c6a87dd5a3b68dce1ef     |
| 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                | 2022-05-31T09:39:27Z                 |
+---------------------------+--------------------------------------+

# [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           | 2022-05-31T09:39:53Z                 |
| description          |                                      |
| dns_nameservers      | 10.0.0.10                            |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           | 10.0.0.1                             |
| host_routes          |                                      |
| id                   | db9a0553-0776-4f24-8e7d-aa454697dd62 |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | subnet1                              |
| network_id           | 9b05bd89-ff99-4ed5-83ca-afe3675e55b0 |
| project_id           | 8787527217494c6a87dd5a3b68dce1ef     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2022-05-31T09:39:53Z                 |
+----------------------+--------------------------------------+

# 設定確認

[root@dlp ~(keystone)]#
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 9b05bd89-ff99-4ed5-83ca-afe3675e55b0 | sharednet1 | db9a0553-0776-4f24-8e7d-aa454697dd62 |
+--------------------------------------+------------+--------------------------------------+
[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。
# 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 |
+--------------------------------------+-----------------+--------+
| 7be5b7ab-36e8-43c7-95dd-34b4139a0e44 | 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                              |
+--------------------------------------+------------+--------------------------------------+
| 9b05bd89-ff99-4ed5-83ca-afe3675e55b0 | sharednet1 | db9a0553-0776-4f24-8e7d-aa454697dd62 |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2022-05-31T08:14:56Z                                                       |
| description     | secgroup01                                                                 |
| id              | 001bf895-7218-4153-b64b-5c5741697009                                       |
| name            | secgroup01                                                                 |
| project_id      | 3d85d1e79d654b3dade01eb5bfbf0679                                           |
| revision_number | 1                                                                          |
| rules           | created_at='2022-05-31T08:14:56Z', direction='egress', ethertype='IPv4'... |
|                 | created_at='2022-05-31T08:14:56Z', direction='egress', ethertype='IPv6'... |
| stateful        | True                                                                       |
| tags            | []                                                                         |
| updated_at      | 2022-05-31T08:14:56Z                                                       |
+-----------------+----------------------------------------------------------------------------+

# 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 | 64:c1:46:5f:d4:dc:07:76:1c:5e:ee:b8:82:1e:9d:c3 |
| id          | mykey                                           |
| is_deleted  | None                                            |
| name        | mykey                                           |
| type        | ssh                                             |
| user_id     | ed0bc393ae81411fa1db0828e1d5e160                |
+-------------+-------------------------------------------------+

[cent@dlp ~(keystone)]$
netID=$(openstack network list | grep sharednet1 | awk '{ print $2 }')

[cent@dlp ~(keystone)]$
openstack server create --flavor m1.small --image CentOS-Stream-8 --security-group secgroup01 --nic net-id=$netID --key-name mykey CentOS-St8
[cent@dlp ~(keystone)]$
openstack server list

+--------------------------------------+------------+--------+-----------------------+-----------------+----------+
| ID                                   | Name       | Status | Networks              | Image           | Flavor   |
+--------------------------------------+------------+--------+-----------------------+-----------------+----------+
| 2d5ecdf0-02c4-4f6f-979c-f8126f881425 | CentOS-St8 | ACTIVE | sharednet1=10.0.0.248 | 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。
# ICMP 許可

[cent@dlp ~(keystone)]$
openstack security group rule create --protocol icmp --ingress secgroup01

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| created_at              | 2022-05-31T09:42:39Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | 96122e6a-c9eb-4cb6-b304-2fe0dc0b3219 |
| name                    | None                                 |
| port_range_max          | None                                 |
| port_range_min          | None                                 |
| project_id              | 3d85d1e79d654b3dade01eb5bfbf0679     |
| 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       | 001bf895-7218-4153-b64b-5c5741697009 |
| tags                    | []                                   |
| tenant_id               | 3d85d1e79d654b3dade01eb5bfbf0679     |
| updated_at              | 2022-05-31T09:42:39Z                 |
+-------------------------+--------------------------------------+

# SSH 許可

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

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| created_at              | 2022-05-31T09:42:58Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | 28191a33-6e5a-487d-a7b7-cdef6f4f9dd9 |
| name                    | None                                 |
| port_range_max          | 22                                   |
| port_range_min          | 22                                   |
| project_id              | 3d85d1e79d654b3dade01eb5bfbf0679     |
| 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       | 001bf895-7218-4153-b64b-5c5741697009 |
| tags                    | []                                   |
| tenant_id               | 3d85d1e79d654b3dade01eb5bfbf0679     |
| updated_at              | 2022-05-31T09:42:58Z                 |
+-------------------------+--------------------------------------+

[cent@dlp ~(keystone)]$
openstack security group rule list secgroup01

+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| ID                                   | IP Protocol | Ethertype | IP Range  | Port Range | Direction | Remote Security Group | Remote Address Group |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| 28191a33-6e5a-487d-a7b7-cdef6f4f9dd9 | tcp         | IPv4      | 0.0.0.0/0 | 22:22      | ingress   | None                  | None                 |
| 7a5ce790-613c-433b-b817-75aa20a10fc1 | None        | IPv4      | 0.0.0.0/0 |            | egress    | None                  | None                 |
| 96122e6a-c9eb-4cb6-b304-2fe0dc0b3219 | icmp        | IPv4      | 0.0.0.0/0 |            | ingress   | None                  | None                 |
| cf9e12bd-90d0-4c9c-b852-12d2cd53eb91 | None        | IPv6      | ::/0      |            | egress    | None                  | None                 |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
[5] インスタンスにログインします。
[cent@dlp ~(keystone)]$
ssh centos@10.0.0.248

The authenticity of host '10.0.0.248 (10.0.0.248)' can't be established.
ECDSA key fingerprint is SHA256:zvqSsqh5gl9wGQ0Fj5E8KSCluDGBbz7Zwy7z9h42y3c.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.248' (ECDSA) to the list of known hosts.
Activate the web console with: systemctl enable --now cockpit.socket

[centos@centos-st8 ~]$     # ログインできた
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