CentOS Stream 8
Sponsored Link

OpenStack Wallaby : Neutron ネットワークを構成する (FLAT)2021/04/23

 
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)

[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                | 2021-04-23T02:08:44Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | b0bf65f0-8c33-47f1-b58b-4d2dba6d1a01 |
| 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                | 620c149e6cc84d7e8f446504cd3cd355     |
| 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                | 2021-04-23T02:08:44Z                 |
+---------------------------+--------------------------------------+

# [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           | 2021-04-23T02:09:05Z                 |
| description          |                                      |
| dns_nameservers      | 10.0.0.10                            |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           | 10.0.0.1                             |
| host_routes          |                                      |
| id                   | ba29524c-6e8e-4937-ac5b-1ca45e353f9c |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | subnet1                              |
| network_id           | b0bf65f0-8c33-47f1-b58b-4d2dba6d1a01 |
| prefix_length        | None                                 |
| project_id           | 620c149e6cc84d7e8f446504cd3cd355     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2021-04-23T02:09:05Z                 |
+----------------------+--------------------------------------+

# 設定確認

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

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| b0bf65f0-8c33-47f1-b58b-4d2dba6d1a01 | sharednet1 | ba29524c-6e8e-4937-ac5b-1ca45e353f9c |
+--------------------------------------+------------+--------------------------------------+
[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 |
+--------------------------------------+-----------------+--------+
| a7f1ad19-4d09-498c-8152-404bf626af98 | 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                              |
+--------------------------------------+------------+--------------------------------------+
| b0bf65f0-8c33-47f1-b58b-4d2dba6d1a01 | sharednet1 | ba29524c-6e8e-4937-ac5b-1ca45e353f9c |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2021-04-23T02:11:08Z                                                          |
| description     | secgroup01                                                                    |
| id              | e10f49d8-8961-4716-9fd1-50d9bc833848                                          |
| name            | secgroup01                                                                    |
| project_id      | 9bdf6ca0e49a416da8df5554fbfdec74                                              |
| revision_number | 1                                                                             |
| rules           | created_at='2021-04-23T02:11:08Z', direction='egress', ethertype='IPv6',..... |
|                 | created_at='2021-04-23T02:11:08Z', direction='egress', ethertype='IPv4',..... |
| stateful        | True                                                                          |
| tags            | []                                                                            |
| updated_at      | 2021-04-23T02:11:08Z                                                          |
+-----------------+-------------------------------------------------------------------------------+

# 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 | 18:f0:6a:99:8d:66:fb:32:e2:df:e6:88:39:55:f4:c5 |
| id          | mykey                                           |
| is_deleted  | None                                            |
| name        | mykey                                           |
| type        | ssh                                             |
| user_id     | b7aeb44b614d46f69b4a53ecee906800                |
+-------------+-------------------------------------------------+

[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=$netID --key-name mykey CentOS-St-8
[cent@dlp ~(keystone)]$
openstack server list

+--------------------------------------+-------------+--------+-----------------------+-----------------+----------+
| ID                                   | Name        | Status | Networks              | Image           | Flavor   |
+--------------------------------------+-------------+--------+-----------------------+-----------------+----------+
| 5d9feb61-04e4-4504-91bf-4953150ae6c2 | CentOS-St-8 | ACTIVE | sharednet1=10.0.0.252 | 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              | 2021-04-23T02:13:39Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | 6320f85b-7283-49a3-8312-41fdba484a1d |
| name                    | None                                 |
| port_range_max          | None                                 |
| port_range_min          | None                                 |
| project_id              | 9bdf6ca0e49a416da8df5554fbfdec74     |
| 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       | e10f49d8-8961-4716-9fd1-50d9bc833848 |
| tags                    | []                                   |
| updated_at              | 2021-04-23T02:13:39Z                 |
+-------------------------+--------------------------------------+

# SSH 許可

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

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| created_at              | 2021-04-23T02:13:56Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | 83791930-299d-47b8-9594-1db95481f570 |
| name                    | None                                 |
| port_range_max          | 22                                   |
| port_range_min          | 22                                   |
| project_id              | 9bdf6ca0e49a416da8df5554fbfdec74     |
| 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       | e10f49d8-8961-4716-9fd1-50d9bc833848 |
| tags                    | []                                   |
| updated_at              | 2021-04-23T02:13:56Z                 |
+-------------------------+--------------------------------------+

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

+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| ID                                   | IP Protocol | Ethertype | IP Range  | Port Range | Direction | Remote Security Group | Remote Address Group |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| 18507758-24fc-402e-a922-d687df9ae637 | None        | IPv6      | ::/0      |            | egress    | None                  | None                 |
| 6320f85b-7283-49a3-8312-41fdba484a1d | icmp        | IPv4      | 0.0.0.0/0 |            | ingress   | None                  | None                 |
| 83791930-299d-47b8-9594-1db95481f570 | tcp         | IPv4      | 0.0.0.0/0 | 22:22      | ingress   | None                  | None                 |
| a49b478e-9ee4-4b23-8324-8be901eef459 | None        | IPv4      | 0.0.0.0/0 |            | egress    | None                  | None                 |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
[5] インスタンスにログインします。
[cent@dlp ~(keystone)]$
ssh centos@10.0.0.252

The authenticity of host '10.0.0.252 (10.0.0.252)' can't be established.
ECDSA key fingerprint is SHA256:p8sdsHQwuP7j4OG4OCq25UNP3xm7eVrKHCw44TKh7/w.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.252' (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
関連コンテンツ