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OpenStack Yoga : Neutron ネットワークを構成する (FLAT)
2022/06/0
 
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                | 2022-06-09T05:01:53Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | 949e41a8-69b3-4756-9fd7-dde46b653b50 |
| 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                | 0f2625947bf0433a9519ba8a29434bdf     |
| 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                | 2022-06-09T05:01:53Z                 |
+---------------------------+--------------------------------------+

# [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           | 2022-06-09T05:02:19Z                 |
| description          |                                      |
| dns_nameservers      | 10.0.0.10                            |
| dns_publish_fixed_ip | None                                 |
| enable_dhcp          | True                                 |
| gateway_ip           | 10.0.0.1                             |
| host_routes          |                                      |
| id                   | bb22e571-6996-45b9-9282-6fe1894e46b6 |
| ip_version           | 4                                    |
| ipv6_address_mode    | None                                 |
| ipv6_ra_mode         | None                                 |
| name                 | subnet1                              |
| network_id           | 949e41a8-69b3-4756-9fd7-dde46b653b50 |
| project_id           | 0f2625947bf0433a9519ba8a29434bdf     |
| revision_number      | 0                                    |
| segment_id           | None                                 |
| service_types        |                                      |
| subnetpool_id        | None                                 |
| tags                 |                                      |
| updated_at           | 2022-06-09T05:02:19Z                 |
+----------------------+--------------------------------------+

# 設定確認

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

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 949e41a8-69b3-4756-9fd7-dde46b653b50 | sharednet1 | bb22e571-6996-45b9-9282-6fe1894e46b6 |
+--------------------------------------+------------+--------------------------------------+
[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 |
+--------------------------------------+----------------+--------+
| 1044ab46-c42b-4cf6-ab1f-aaeb011fb3b9 | CentOS-Stream9 | active |
+--------------------------------------+----------------+--------+

# 利用可能なネットワーク確認

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

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 949e41a8-69b3-4756-9fd7-dde46b653b50 | sharednet1 | bb22e571-6996-45b9-9282-6fe1894e46b6 |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2022-06-09T05:20:22Z                                                      |
| description     | secgroup01                                                                |
| id              | d1c70f18-9f03-4488-a068-f0141ccbe0a2                                      |
| name            | secgroup01                                                                |
| project_id      | 911e5ff7686741c782d6acc6d7155db1                                          |
| revision_number | 1                                                                         |
| rules           | created_at='2022-06-09T05:20:22Z', direction='egress', ethertype='IPv6... |
|                 | created_at='2022-06-09T05:20:22Z', direction='egress', ethertype='IPv4... |
| stateful        | True                                                                      |
| tags            | []                                                                        |
| updated_at      | 2022-06-09T05:20:22Z                                                      |
+-----------------+---------------------------------------------------------------------------+

# 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 | 15:10:d2:c1:39:e8:87:ef:35:6d:69:3c:f3:0a:4c:7d |
| id          | mykey                                           |
| is_deleted  | None                                            |
| name        | mykey                                           |
| type        | ssh                                             |
| user_id     | 1ff4591a7f8140fcad38fd9f606a66a6                |
+-------------+-------------------------------------------------+

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

[cent@dlp ~(keystone)]$
openstack server create --flavor m1.small --image CentOS-Stream9 --security-group secgroup01 --nic net-id=$netID --key-name mykey CentOS-St9
[cent@dlp ~(keystone)]$
openstack server list

+--------------------------------------+------------+--------+-----------------------+----------------+----------+
| ID                                   | Name       | Status | Networks              | Image          | Flavor   |
+--------------------------------------+------------+--------+-----------------------+----------------+----------+
| 9ab636a6-c940-491e-a840-22af5f7c4ca9 | CentOS-St9 | ACTIVE | sharednet1=10.0.0.249 | CentOS-Stream9 | 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              | 2022-06-09T05:24:36Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | d2027564-c653-42ff-b5cb-4b8df2515b8d |
| name                    | None                                 |
| port_range_max          | None                                 |
| port_range_min          | None                                 |
| project_id              | 911e5ff7686741c782d6acc6d7155db1     |
| 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       | d1c70f18-9f03-4488-a068-f0141ccbe0a2 |
| tags                    | []                                   |
| tenant_id               | 911e5ff7686741c782d6acc6d7155db1     |
| updated_at              | 2022-06-09T05:24:36Z                 |
+-------------------------+--------------------------------------+

# SSH 許可

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

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| created_at              | 2022-06-09T05:24:51Z                 |
| description             |                                      |
| direction               | ingress                              |
| ether_type              | IPv4                                 |
| id                      | d0bdbab6-a1f7-48fe-92e6-30675bbb6467 |
| name                    | None                                 |
| port_range_max          | 22                                   |
| port_range_min          | 22                                   |
| project_id              | 911e5ff7686741c782d6acc6d7155db1     |
| 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       | d1c70f18-9f03-4488-a068-f0141ccbe0a2 |
| tags                    | []                                   |
| tenant_id               | 911e5ff7686741c782d6acc6d7155db1     |
| updated_at              | 2022-06-09T05:24:51Z                 |
+-------------------------+--------------------------------------+

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

+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| ID                                   | IP Protocol | Ethertype | IP Range  | Port Range | Direction | Remote Security Group | Remote Address Group |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
| 439d5a6a-878c-46cd-acfd-1e7aaeae5719 | None        | IPv6      | ::/0      |            | egress    | None                  | None                 |
| 4c2ef761-1f56-4e5a-a77d-377b59d6ac11 | None        | IPv4      | 0.0.0.0/0 |            | egress    | None                  | None                 |
| d0bdbab6-a1f7-48fe-92e6-30675bbb6467 | tcp         | IPv4      | 0.0.0.0/0 | 22:22      | ingress   | None                  | None                 |
| d2027564-c653-42ff-b5cb-4b8df2515b8d | icmp        | IPv4      | 0.0.0.0/0 |            | ingress   | None                  | None                 |
+--------------------------------------+-------------+-----------+-----------+------------+-----------+-----------------------+----------------------+
[5] インスタンスにログインします。
[cent@dlp ~(keystone)]$
ssh centos@10.0.0.249

The authenticity of host '10.0.0.249 (10.0.0.249)' can't be established.
ED25519 key fingerprint is SHA256:lmDhtErC2TcaXbEQJyAXSkRVQPaCNdDqAng2A4HbZpc.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.0.0.249' (ED25519) to the list of known hosts.
[centos@centos-st9 ~]$     # ログインできた
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