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OpenStack Queens : Neutron ネットワークを構成する (FLAT)
2018/03/07
 
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                       |eth1

[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

[root@network ~]#
ovs-vsctl add-port br-eth1 eth1

[root@network ~]#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# 181行目:追記

[ml2_type_flat]
flat_networks = physnet1
[root@network ~]#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# 194行目: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                | 2018-03-08T04:37:03Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | 5ffea5aa-33d8-4a43-8517-481aedc8c728 |
| 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                | b1da1070c8af427886d0202f8bbe414f     |
| provider:network_type     | flat                                 |
| provider:physical_network | physnet1                             |
| provider:segmentation_id  | None                                 |
| qos_policy_id             | None                                 |
| revision_number           | 2                                    |
| router:external           | Internal                             |
| segments                  | None                                 |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      |                                      |
| updated_at                | 2018-03-08T04:37:03Z                 |
+---------------------------+--------------------------------------+

# [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        | 2018-03-08T04:37:28Z                 |
| description       |                                      |
| dns_nameservers   | 10.0.0.10                            |
| enable_dhcp       | True                                 |
| gateway_ip        | 10.0.0.1                             |
| host_routes       |                                      |
| id                | ef33af75-9db0-4342-9e8d-e8c487cf3e4a |
| ip_version        | 4                                    |
| ipv6_address_mode | None                                 |
| ipv6_ra_mode      | None                                 |
| name              | subnet1                              |
| network_id        | 5ffea5aa-33d8-4a43-8517-481aedc8c728 |
| project_id        | b1da1070c8af427886d0202f8bbe414f     |
| revision_number   | 0                                    |
| segment_id        | None                                 |
| service_types     |                                      |
| subnetpool_id     | None                                 |
| tags              |                                      |
| updated_at        | 2018-03-08T04:37:28Z                 |
+-------------------+--------------------------------------+

# 設定確認

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

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 5ffea5aa-33d8-4a43-8517-481aedc8c728 | sharednet1 | ef33af75-9db0-4342-9e8d-e8c487cf3e4a |
+--------------------------------------+------------+--------------------------------------+
[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 |
+--------------------------------------+---------+--------+
| 88551fbc-ce7e-4719-a67a-dd7cad478019 | CentOS7 | active |
+--------------------------------------+---------+--------+

# 利用可能なネットワーク確認

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

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| 5ffea5aa-33d8-4a43-8517-481aedc8c728 | sharednet1 | ef33af75-9db0-4342-9e8d-e8c487cf3e4a |
+--------------------------------------+------------+--------------------------------------+

# 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      | 2018-03-08T04:42:07Z                                                          |
| description     | secgroup01                                                                    |
| id              | d32a7faf-8de1-4a30-8d95-c8efa6b72548                                          |
| name            | secgroup01                                                                    |
| project_id      | e2236920f07b4fedb55d4ea454173b79                                              |
| revision_number | 2                                                                             |
| rules           | created_at='2018-03-08T04:42:07Z', direction='egress', ethertype='IPv6', ...' |
|                 | created_at='2018-03-08T04:42:07Z', direction='egress', ethertype='IPv4', ...' |
| updated_at      | 2018-03-08T04:42:07Z                                                          |
+-----------------+-------------------------------------------------------------------------------+

# 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 | 36:fe:4c:e4:7f:a3:27:1a:f7:a3:4f:fa:b9:a6:16:92 |
| name        | mykey                                           |
| user_id     | a1ecf467167542bdb615ba4311f4bf0a                |
+-------------+-------------------------------------------------+

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

[cent@dlp ~(keystone)]$
openstack server create --flavor m1.small --image CentOS7 --security-group secgroup01 --nic net-id=$netID --key-name mykey CentOS_7
[cent@dlp ~(keystone)]$
openstack server list

+--------------------------------------+----------+--------+-----------------------+---------+----------+
| ID                                   | Name     | Status | Networks              | Image   | Flavor   |
+--------------------------------------+----------+--------+-----------------------+---------+----------+
| 2a890645-1249-42fe-bb54-99d43f1bee82 | CentOS_7 | ACTIVE | sharednet1=10.0.0.208 | CentOS7 | 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        | 2018-03-08T04:51:13Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | 3fbcdca5-c5db-40b6-87f8-f09ddd952434 |
| name              | None                                 |
| port_range_max    | None                                 |
| port_range_min    | None                                 |
| project_id        | e2236920f07b4fedb55d4ea454173b79     |
| protocol          | icmp                                 |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | d32a7faf-8de1-4a30-8d95-c8efa6b72548 |
| updated_at        | 2018-03-08T04:51:13Z                 |
+-------------------+--------------------------------------+

# SSH 許可

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

+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2018-03-08T04:51:30Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | 88c61ff7-4dfc-42f4-bd70-744a42afa712 |
| name              | None                                 |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| project_id        | e2236920f07b4fedb55d4ea454173b79     |
| protocol          | tcp                                  |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | d32a7faf-8de1-4a30-8d95-c8efa6b72548 |
| updated_at        | 2018-03-08T04:51:30Z                 |
+-------------------+--------------------------------------+

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

+--------------+-------------+-----------+------------+-----------------------------+---------------------+
| ID           | IP Protocol | IP Range  | Port Range | Remote Security Group       | Security Group      |
+--------------+-------------+-----------+------------+-----------------------------+---------------------+
| 1bf389ef-... | None        | None      |            | 7d6d93eb-05b0-4dd7-87cb-... | 7d6d93eb-05b0-4d... |
| 3fbcdca5-... | icmp        | 0.0.0.0/0 |            | None                        | d32a7faf-8de1-4a... |
| 5e217486-... | None        | None      |            | 7d6d93eb-05b0-4dd7-87cb-... | 7d6d93eb-05b0-4d... |
| 68c424ae-... | None        | None      |            | None                        | 7d6d93eb-05b0-4d... |
| 88c61ff7-... | tcp         | 0.0.0.0/0 | 22:22      | None                        | d32a7faf-8de1-4a... |
| 8f685930-... | None        | None      |            | None                        | 7d6d93eb-05b0-4d... |
| aa9dbb1d-... | None        | None      |            | None                        | d32a7faf-8de1-4a... |
| f730d562-... | None        | None      |            | None                        | d32a7faf-8de1-4a... |
+--------------+-------------+-----------+------------+-----------------------------+---------------------+
[5] インスタンスにログインします。
[cent@dlp ~(keystone)]$
ssh -i mykey centos@10.0.0.208

Warning: Identity file mykey not accessible: No such file or directory.
The authenticity of host '10.0.0.208 (10.0.0.208)' can't be established.
ECDSA key fingerprint is SHA256:xHIBEd/rhh5IPJGv7rXS/VmbM+4i2FJMA6UWPA0UUT8.
ECDSA key fingerprint is MD5:5b:01:d5:5a:40:c5:1a:d7:05:40:f6:96:0a:db:52:6d.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.0.0.208' (ECDSA) to the list of known hosts.
[centos@centos-7 ~]$    
# ログインできた
 
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