CentOS 8
Sponsored Link

OpenStack Ussuri : Neutron ネットワークを構成する (FLAT)2020/06/05

 
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 ノードが二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

Created a new network:
+---------------------------+-----------------------------------------------------------------------+
| Field                     | Value                                                                 |
+---------------------------+-----------------------------------------------------------------------+
| admin_state_up            | UP                                                                    |
| availability_zone_hints   |                                                                       |
| availability_zones        |                                                                       |
| created_at                | 2020-06-05T06:11:43Z                                                  |
| description               |                                                                       |
| dns_domain                | None                                                                  |
| id                        | 2c45bb31-49c9-4bbb-8303-f882d229a012                                  |
| ipv4_address_scope        | None                                                                  |
| ipv6_address_scope        | None                                                                  |
| is_default                | False                                                                 |
| is_vlan_transparent       | None                                                                  |
| location                  | cloud='', project.domain_id=, project.domain_name=, project.id='03... |
| mtu                       | 1500                                                                  |
| name                      | sharednet1                                                            |
| port_security_enabled     | True                                                                  |
| project_id                | 03fc3b5cc0434f748ec562dd74866396                                      |
| 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                | 2020-06-05T06:11:43Z                                                  |
+---------------------------+-----------------------------------------------------------------------+

# [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

Created a new subnet:
+----------------------+----------------------------------------------------------------------------+
| Field                | Value                                                                      |
+----------------------+----------------------------------------------------------------------------+
| allocation_pools     | 10.0.0.200-10.0.0.254                                                      |
| cidr                 | 10.0.0.0/24                                                                |
| created_at           | 2020-06-05T06:12:19Z                                                       |
| description          |                                                                            |
| dns_nameservers      | 10.0.0.10                                                                  |
| dns_publish_fixed_ip | None                                                                       |
| enable_dhcp          | True                                                                       |
| gateway_ip           | 10.0.0.1                                                                   |
| host_routes          |                                                                            |
| id                   | 8b45c755-f140-45bd-bd22-83f6854fcbcc                                       |
| ip_version           | 4                                                                          |
| ipv6_address_mode    | None                                                                       |
| ipv6_ra_mode         | None                                                                       |
| location             | cloud='', project.domain_id=, project.domain_name=, project.id='03fc3b5... |
| name                 | subnet1                                                                    |
| network_id           | 2c45bb31-49c9-4bbb-8303-f882d229a012                                       |
| prefix_length        | None                                                                       |
| project_id           | 03fc3b5cc0434f748ec562dd74866396                                           |
| revision_number      | 0                                                                          |
| segment_id           | None                                                                       |
| service_types        |                                                                            |
| subnetpool_id        | None                                                                       |
| tags                 |                                                                            |
| updated_at           | 2020-06-05T06:12:19Z                                                       |
+----------------------+----------------------------------------------------------------------------+

# 設定確認

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

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 2c45bb31-49c9-4bbb-8303-f882d229a012 | sharednet1 | 8b45c755-f140-45bd-bd22-83f6854fcbcc |
+--------------------------------------+------------+--------------------------------------+
[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紐付けて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 |
+--------------------------------------+---------+--------+
| 9e7034a0-c825-4990-8834-4a01ee920cf5 | CentOS8 | active |
+--------------------------------------+---------+--------+

# 利用可能なネットワーク確認

[cent@dlp ~(keystone)]$
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 2c45bb31-49c9-4bbb-8303-f882d229a012 | sharednet1 | 8b45c755-f140-45bd-bd22-83f6854fcbcc |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2020-06-05T06:14:47Z                                                            |
| description     | secgroup01                                                                      |
| id              | 9db2b1cc-90b3-4f01-8b4b-d8d2871f3a1a                                            |
| location        | cloud='', project.domain_id=, project.domain_name='default', project.id='d9c... |
| name            | secgroup01                                                                      |
| project_id      | d9c8c215499949cfb249b28bdaba848a                                                |
| revision_number | 1                                                                               |
| rules           | created_at='2020-06-05T06:14:47Z', direction='egress', ethertype='IPv6', id=... |
|                 | created_at='2020-06-05T06:14:47Z', direction='egress', ethertype='IPv4', id=... |
| stateful        | True                                                                            |
| tags            | []                                                                              |
| updated_at      | 2020-06-05T06:14:47Z                                                            |
+-----------------+---------------------------------------------------------------------------------+

# 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 | 24:c6:94:47:0c:49:e1:56:ed:f6:d5:06:32:9d:00:97 |
| name        | mykey                                           |
| user_id     | 0e4117de456a4bbaa5aac2cc6507be91                |
+-------------+-------------------------------------------------+

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

[cent@dlp ~(keystone)]$
openstack server create --flavor m1.small --image CentOS8 --security-group secgroup01 --nic net-id=$netID --key-name mykey CentOS_8
[cent@dlp ~(keystone)]$
openstack server list

+--------------------------------------+----------+--------+-----------------------+---------+----------+
| ID                                   | Name     | Status | Networks              | Image   | Flavor   |
+--------------------------------------+----------+--------+-----------------------+---------+----------+
| e8693da9-8428-493a-a09f-c6f9bfacd889 | CentOS_8 | ACTIVE | sharednet1=10.0.0.223 | CentOS8 | 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        | 2020-06-05T06:17:51Z                                                          |
| description       |                                                                               |
| direction         | ingress                                                                       |
| ether_type        | IPv4                                                                          |
| id                | 4740a5b5-1dae-4beb-ad32-412dbb8c160d                                          |
| location          | cloud='', project.domain_id=, project.domain_name='default', project.id='d... |
| name              | None                                                                          |
| port_range_max    | None                                                                          |
| port_range_min    | None                                                                          |
| project_id        | d9c8c215499949cfb249b28bdaba848a                                              |
| protocol          | icmp                                                                          |
| remote_group_id   | None                                                                          |
| remote_ip_prefix  | 0.0.0.0/0                                                                     |
| revision_number   | 0                                                                             |
| security_group_id | 9db2b1cc-90b3-4f01-8b4b-d8d2871f3a1a                                          |
| tags              | []                                                                            |
| updated_at        | 2020-06-05T06:17:51Z                                                          |
+-------------------+-------------------------------------------------------------------------------+

# SSH 許可

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

+-------------------+-------------------------------------------------------------------------------+
| Field             | Value                                                                         |
+-------------------+-------------------------------------------------------------------------------+
| created_at        | 2020-06-05T06:18:25Z                                                          |
| description       |                                                                               |
| direction         | ingress                                                                       |
| ether_type        | IPv4                                                                          |
| id                | df6185ea-ca0e-445b-b685-0fbf9bce1d7d                                          |
| location          | cloud='', project.domain_id=, project.domain_name='default', project.id='d... |
| name              | None                                                                          |
| port_range_max    | 22                                                                            |
| port_range_min    | 22                                                                            |
| project_id        | d9c8c215499949cfb249b28bdaba848a                                              |
| protocol          | tcp                                                                           |
| remote_group_id   | None                                                                          |
| remote_ip_prefix  | 0.0.0.0/0                                                                     |
| revision_number   | 0                                                                             |
| security_group_id | 9db2b1cc-90b3-4f01-8b4b-d8d2871f3a1a                                          |
| tags              | []                                                                            |
| updated_at        | 2020-06-05T06:18:25Z                                                          |
+-------------------+-------------------------------------------------------------------------------+

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

+--------------------------------------+-------------+-----------+-----------+------------+---------+
| ID                                   | IP Protocol | Ethertype | IP Range  | Port Range | Remote  |
+--------------------------------------+-------------+-----------+-----------+------------+---------+
| 320b1083-f6d6-43c3-add6-508f532b2a0e | None        | IPv4      | 0.0.0.0/0 |            | 7834... |
| 4740a5b5-1dae-4beb-ad32-412dbb8c160d | icmp        | IPv4      | 0.0.0.0/0 |            | None    |
| 4db37c3e-5922-4205-8336-53ab10f5ae33 | None        | IPv4      | 0.0.0.0/0 |            | None    |
| 6fb57aaf-8787-40f0-8259-e51960b9cc06 | None        | IPv6      | ::/0      |            | 7834... |
| 7d28b18f-9c19-4158-b1f1-0763b3e74f41 | None        | IPv6      | ::/0      |            | None    |
| b8b68fef-5223-47eb-962c-933499f88a77 | None        | IPv6      | ::/0      |            | None    |
| d6b96cc3-9482-4f47-8cda-a269b4254e41 | None        | IPv4      | 0.0.0.0/0 |            | None    |
| df6185ea-ca0e-445b-b685-0fbf9bce1d7d | tcp         | IPv4      | 0.0.0.0/0 | 22:22      | None    |
+--------------------------------------+-------------+-----------+-----------+------------+---------+
[5] インスタンスにログインします。
[cent@dlp ~(keystone)]$
ssh centos@10.0.0.223

The authenticity of host '10.0.0.223 (10.0.0.223)' can't be established.
ECDSA key fingerprint is SHA256:hD1ZD9t33s/u9T8QCNh0/mLP7PVSFsgdL62Z2PTFpq0.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.223' (ECDSA) to the list of known hosts.
[centos@centos-8 ~]$     # ログインできた
関連コンテンツ