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OpenStack Victoria : Neutron ネットワークを構成 (FLAT)
2021/08/31
 
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。
また、下例で eth1 の方は IP なしでインターフェースを UP しています。
IP なしでのインターフェース UP の設定はこちらの [1] を参照ください
------------+---------------------------+---------------------------+------------
            |                           |                           |
        eth0|10.0.0.30              eth0|10.0.0.50              eth0|10.0.0.51
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|    [ Control Node ]   |   |    [ Network Node ]   |   |    [ Compute Node ]   |
|                       |   |                       |   |                       |
|  MariaDB    RabbitMQ  |   |        L2 Agent       |   |        Libvirt        |
|  Memcached  httpd     |   |        L3 Agent       |   |     Nova Compute      |
|  Keystone   Glance    |   |     Metadata Agent    |   |        L2 Agent       |
|  Nova API             |   |                       |   |                       |
|  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。
root@network:~#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# 174行目 : 変更

[ml2_type_flat]
.....
.....
flat_networks =
physnet1
root@network:~#
vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
# 162行目 : 追記

[linux_bridge]
physical_interface_mappings = physnet1:eth1
root@network:~#
systemctl restart neutron-linuxbridge-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                | 2021-08-31T08:42:39Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | b5cbb9ab-9600-413e-bdf0-fb3749213367 |
| 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                | 1718217eee4b4f2ea143d65122864fe0     |
| 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                | 2021-08-31T08:42:39Z                 |
+---------------------------+--------------------------------------+

# [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           | 2021-08-31T08:43:01Z                 |
| description          |                                      |
| dns_nameservers      | 10.0.0.10                            |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           | 10.0.0.1                             |
| host_routes          |                                      |
| id                   | 4ccef7c3-7318-4479-b372-e52d96e189f3 |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | subnet1                              |
| network_id           | b5cbb9ab-9600-413e-bdf0-fb3749213367 |
| prefix_length        | None                                 |
| project_id           | 1718217eee4b4f2ea143d65122864fe0     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2021-08-31T08:43:01Z                 |
+----------------------+--------------------------------------+

# 設定確認

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| b5cbb9ab-9600-413e-bdf0-fb3749213367 | sharednet1 | 4ccef7c3-7318-4479-b372-e52d96e189f3 |
+--------------------------------------+------------+--------------------------------------+
[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

debian@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

debian@dlp ~(keystone)$
openstack image list

+--------------------------------------+----------+--------+
| ID                                   | Name     | Status |
+--------------------------------------+----------+--------+
| 773971b3-b4be-4b07-aa06-fe8ca76b395d | Debian11 | active |
+--------------------------------------+----------+--------+

# 利用可能なネットワーク確認

debian@dlp ~(keystone)$
openstack network list

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| b5cbb9ab-9600-413e-bdf0-fb3749213367 | sharednet1 | 4ccef7c3-7318-4479-b372-e52d96e189f3 |
+--------------------------------------+------------+--------------------------------------+

# インスタンス用のセキュリティグループを作成

debian@dlp ~(keystone)$
openstack security group create secgroup01

+-----------------+---------------------------------------------------------------------------+
| Field           | Value                                                                     |
+-----------------+---------------------------------------------------------------------------+
| created_at      | 2021-08-31T09:11:50Z                                                      |
| description     | secgroup01                                                                |
| id              | 3917ede8-a357-46cd-af3c-df112b7c4193                                      |
| name            | secgroup01                                                                |
| project_id      | cba75a02a921457db62b660f3d0b57c4                                          |
| revision_number | 1                                                                         |
| rules           | created_at='2021-08-31T09:11:50Z', direction='egress', ethertype='IP..... |
|                 | created_at='2021-08-31T09:11:50Z', direction='egress', ethertype='IP..... |
| stateful        | True                                                                      |
| tags            | []                                                                        |
| updated_at      | 2021-08-31T09:11:50Z                                                      |
+-----------------+---------------------------------------------------------------------------+

# インスタンス接続用の SSH キーペア作成

debian@dlp ~(keystone)$
ssh-keygen -q -N ""

Enter file in which to save the key (/home/debian/.ssh/id_rsa):
# 公開鍵登録

debian@dlp ~(keystone)$
openstack keypair create --public-key ~/.ssh/id_rsa.pub mykey

+-------------+-------------------------------------------------+
| Field       | Value                                           |
+-------------+-------------------------------------------------+
| fingerprint | ef:8a:e6:db:00:11:30:dd:02:b1:b6:b0:9f:2d:57:02 |
| name        | mykey                                           |
| user_id     | 62a91aa559f64acab11861ed7cd51ecc                |
+-------------+-------------------------------------------------+

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

debian@dlp ~(keystone)$
openstack server create --flavor m1.small --image Debian11 --security-group secgroup01 --nic net-id=$netID --key-name mykey Debian-11
debian@dlp ~(keystone)$
openstack server list

+--------------------------------------+-----------+--------+-----------------------+----------+----------+
| ID                                   | Name      | Status | Networks              | Image    | Flavor   |
+--------------------------------------+-----------+--------+-----------------------+----------+----------+
| e2144a46-183e-481e-8b40-5bf517b1431a | Debian-11 | ACTIVE | sharednet1=10.0.0.254 | Debian11 | 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

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

+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2021-08-31T09:15:02Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | 45c81656-5cb9-4199-9ffc-8a1657e79e17 |
| name              | None                                 |
| port_range_max    | None                                 |
| port_range_min    | None                                 |
| project_id        | cba75a02a921457db62b660f3d0b57c4     |
| protocol          | icmp                                 |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | 3917ede8-a357-46cd-af3c-df112b7c4193 |
| tags              | []                                   |
| updated_at        | 2021-08-31T09:15:02Z                 |
+-------------------+--------------------------------------+

# SSH 許可

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

+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2021-08-31T09:15:17Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | 84b92a0d-0237-47ae-a175-d2bce07475f4 |
| name              | None                                 |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| project_id        | cba75a02a921457db62b660f3d0b57c4     |
| protocol          | tcp                                  |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | 3917ede8-a357-46cd-af3c-df112b7c4193 |
| tags              | []                                   |
| updated_at        | 2021-08-31T09:15:17Z                 |
+-------------------+--------------------------------------+

debian@dlp ~(keystone)$
openstack security group rule list secgroup01

+--------------------------------------+-------------+-----------+-----------+------------+-----------------------+
| ID                                   | IP Protocol | Ethertype | IP Range  | Port Range | Remote Security Group |
+--------------------------------------+-------------+-----------+-----------+------------+-----------------------+
| 1e25e933-e2cd-47a6-b729-7d19ba8b59e8 | None        | IPv4      | 0.0.0.0/0 |            | None                  |
| 45c81656-5cb9-4199-9ffc-8a1657e79e17 | icmp        | IPv4      | 0.0.0.0/0 |            | None                  |
| 84b92a0d-0237-47ae-a175-d2bce07475f4 | tcp         | IPv4      | 0.0.0.0/0 | 22:22      | None                  |
| efca3489-674f-4bba-8a7a-29eb5ead212d | None        | IPv6      | ::/0      |            | None                  |
+--------------------------------------+-------------+-----------+-----------+------------+-----------------------+
[5] インスタンスにログインします。
debian@dlp ~(keystone)$
ssh debian@10.0.0.254

The authenticity of host '10.0.0.254 (10.0.0.254)' can't be established.
ECDSA key fingerprint is SHA256:InwJlXliarVPnOMqwbUgb9rMo7qY6TeFMbbqoGUOm94.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.254' (ECDSA) to the list of known hosts.

Linux debian 5.10.0-8-amd64 #1 SMP Debian 5.10.46-4 (2021-08-03) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.

debian@debian:~$     # ログインできた
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