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OpenStack Pike : Neutron ネットワークを構成する (FLAT)
2017/09/04
 
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
# 166行目:追記

[ml2_type_flat]
flat_networks = physnet1
[root@network ~]#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# 180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、ここでは 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                | 2017-09-05T08:27:04Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | a738c6d8-126b-4b2b-bb35-305c3372f54a |
| 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                | c9ab6e9feb4d444c8f637fcfe7a67305     |
| 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                | 2017-09-05T08:27:04Z                 |
+---------------------------+--------------------------------------+

# [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              | 2017-09-05T08:29:09Z                 |
| description             |                                      |
| dns_nameservers         | 10.0.0.10                            |
| enable_dhcp             | True                                 |
| gateway_ip              | 10.0.0.1                             |
| host_routes             |                                      |
| id                      | 60004ac5-89f9-48be-a09f-661c76ff5d58 |
| ip_version              | 4                                    |
| ipv6_address_mode       | None                                 |
| ipv6_ra_mode            | None                                 |
| name                    | subnet1                              |
| network_id              | a738c6d8-126b-4b2b-bb35-305c3372f54a |
| project_id              | c9ab6e9feb4d444c8f637fcfe7a67305     |
| revision_number         | 0                                    |
| segment_id              | None                                 |
| service_types           |                                      |
| subnetpool_id           | None                                 |
| tags                    |                                      |
| updated_at              | 2017-09-05T08:29:09Z                 |
| use_default_subnet_pool | None                                 |
+-------------------------+--------------------------------------+

# 設定確認

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

+--------------------------------------+------------+--------------------------------------+
| ID                                   | Name       | Subnets                              |
+--------------------------------------+------------+--------------------------------------+
| a738c6d8-126b-4b2b-bb35-305c3372f54a | sharednet1 | 60004ac5-89f9-48be-a09f-661c76ff5d58 |
+--------------------------------------+------------+--------------------------------------+
[3] 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。
[root@dlp ~(keystone)]#
netID=`openstack network list | grep sharednet1 | awk '{ print $2 }'`

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

+--------------------------------------+---------+--------+
| ID                                   | Name    | Status |
+--------------------------------------+---------+--------+
| 68132026-60aa-4afe-8976-398b0482cfd6 | CentOS7 | active |
+--------------------------------------+---------+--------+

# キーペア作成

[root@dlp ~(keystone)]#
ssh-keygen -q -N ""

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

[root@dlp ~(keystone)]#
openstack keypair create --public-key ~/.ssh/id_rsa.pub mykey

+-------------+-------------------------------------------------+
| Field       | Value                                           |
+-------------+-------------------------------------------------+
| fingerprint | b3:d6:64:1a:6f:4e:14:63:88:76:15:a4:bd:af:a6:34 |
| name        | mykey                                           |
| user_id     | 09d8dfa20e0f40eaae448d369943b195                |
+-------------+-------------------------------------------------+

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

+--------------------------------------+----------+--------+-----------------------+---------+----------+
| ID                                   | Name     | Status | Networks              | Image   | Flavor   |
+--------------------------------------+----------+--------+-----------------------+---------+----------+
| 344a5689-1512-4bba-af64-43b580e5dcbb | CentOS_7 | ACTIVE | sharednet1=10.0.0.202 | CentOS7 | m1.small |
+--------------------------------------+----------+--------+-----------------------+---------+----------+
[4] 起動した仮想マシンインスタンスにSSHで接続できるように、デフォルトセキュリティグループにポート許可の設定をしておきます。
# ICMP 許可

[root@dlp ~(keystone)]#
openstack security group rule create --protocol icmp --ingress default

Created a new security_group_rule:
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2017-09-05T08:36:23Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | 99059300-c8ba-4680-b4ea-654c95766462 |
| name              | None                                 |
| port_range_max    | None                                 |
| port_range_min    | None                                 |
| project_id        | 09158bee8c6441519bf3a3743d936566     |
| protocol          | icmp                                 |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | b5e75eee-2435-4b69-afd9-d097179ce150 |
| updated_at        | 2017-09-05T08:36:23Z                 |
+-------------------+--------------------------------------+

# SSH 許可

[root@dlp ~(keystone)]#
openstack security group rule create --protocol tcp --dst-port 22:22 default

Created a new security_group_rule:
+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2017-09-05T08:36:38Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | d655a400-08d6-4275-b3f4-a7a0681502b6 |
| name              | None                                 |
| port_range_max    | 22                                   |
| port_range_min    | 22                                   |
| project_id        | 09158bee8c6441519bf3a3743d936566     |
| protocol          | tcp                                  |
| remote_group_id   | None                                 |
| remote_ip_prefix  | 0.0.0.0/0                            |
| revision_number   | 0                                    |
| security_group_id | b5e75eee-2435-4b69-afd9-d097179ce150 |
| updated_at        | 2017-09-05T08:36:38Z                 |
+-------------------+--------------------------------------+

[root@dlp ~(keystone)]#
openstack security group rule list

+--------------+-------------+-----------+------------+-----------------------------+-------------------+
| ID           | IP Protocol | IP Range  | Port Range | Remote Security Group       | Security Group    |
+--------------+-------------+-----------+------------+-----------------------------+-------------------+
| 1ac6e187-... | None        | None      |            | None                        | b5e75eee-2435-... |
| 655ac54e-... | None        | None      |            | None                        | b5e75eee-2435-... |
| 76f54486-... | None        | None      |            | b5e75eee-2435-4b69-afd9-... | b5e75eee-2435-... |
| 99059300-... | icmp        | 0.0.0.0/0 |            | None                        | b5e75eee-2435-... |
| 9fd12567-... | None        | None      |            | b5e75eee-2435-4b69-afd9-... | b5e75eee-2435-... |
| d655a400-... | tcp         | 0.0.0.0/0 | 22:22      | None                        | b5e75eee-2435-... |
+--------------+-------------+-----------+------------+-----------------------------+-------------------+
[5] インスタンスにログインします。
[root@dlp ~(keystone)]#
ssh centos@10.0.0.202

The authenticity of host '10.0.0.202 (10.0.0.202)' can't be established.
ECDSA key fingerprint is 94:11:48:02:fa:62:ff:9c:c4:75:8f:eb:16:62:a9:ff.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.0.0.202' (ECDSA) to the list of known hosts.
[centos@centos-7 ~]$    
# ログインできた
 
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