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OpenStack Icehouse : ネットワーク構成#1
2014/06/25
 
OpenStack Network Service(Neutron)による仮想ネットワークの構成です。
例として、シンプルなフラットネットワークを構成します。
Control ノードNetwork ノードCompute ノードはそれぞれ事前に基本設定をしておいてください。
また、Network ノードと Compute ノードはネットワークインターフェースを二つ持っていることを前提とします。

                                        |
  +-------------+                  +----+----+
  | Name Server |                  | Gateway |
  +------+------+                  +----+----+
         |10.0.0.10                     |10.0.0.1
         |                              |
         +------------+-----------------+------------------+
         |            |                 |                  |     10.0.0.200-10.0.0.250
     eth0|10.0.0.30   |             eth0|10.0.0.50         |         +-----------------+
+--------+---------+  |     +-----------+----------+       |     +---| Virtual Machine |
| [ Control Node ] |  |     |   [ Network Node ]   |       |     |   +-----------------+
|     Keystone     |  |     |       DHCP Agent     |       |     |   +-----------------+
|      Glance      |  |     |       L3 Agent       |eth1   |     |---| Virtual Machine |
|     Nova API     |  |     |       L2 Agent       |       |     |   +-----------------+
|  Neutron Server  |  |     |    Metadata Agent    |       |     |   +-----------------+
+------------------+  |     +----------------------+       +-----+---| Virtual Machine |
                      |                                          |   +-----------------+
                      |     +----------------------+             |   +-----------------+
                      | eth0|   [ Compute Node ]   |             |---| Virtual Machine |
                      +-----|     Nova Compute     |eth1         |   +-----------------+
                   10.0.0.51|       L2 Agent       |             |   +-----------------+
                            +----------------------+             +---| Virtual Machine |
                                                                     +-----------------+

[1] Network ノード、および Compute ノードの両方で以下の設定をしてください。
[root@network ~]#
ovs-vsctl add-br br-eth1
   
# ブリッジ追加

[root@network ~]#
ovs-vsctl add-port br-eth1 eth1
   
# 追加したブリッジのポートにeth1を追加

[root@network ~]#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# 最終行に追記

[ovs]
flat_networks = physnet1
bridge_mappings = physnet1:br-eth1
[root@network ~]#
/etc/rc.d/init.d/neutron-openvswitch-agent restart

Stopping neutron-openvswitch-agent:                        [  OK  ]
Starting neutron-openvswitch-agent:                        [  OK  ]
[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)]#
tenantID=`keystone tenant-list | grep service | awk '{print $2}'`
# 「sharednet1」という名前のネットワークを作成

[root@dlp ~(keystone)]#
neutron net-create --tenant-id $tenantID sharednet1 \
--shared --provider:network_type flat --provider:physical_network physnet1

Created a new network:
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | True                                 |
| id                        | 8291f377-18b4-4315-a397-6fdc358680d9 |
| name                      | sharednet1                           |
| provider:network_type     | flat                                 |
| provider:physical_network | physnet1                             |
| provider:segmentation_id  |                                      |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tenant_id                 | fc294b687db2410189f7c8bd81efe426     |
+---------------------------+--------------------------------------+

# 作成した「sharednet1」に「10.0.0.0/24」のサブネットを作成

[root@dlp ~(keystone)]#
neutron subnet-create \
--tenant-id $tenantID --gateway 10.0.0.1 --dns-nameserver 10.0.0.1 \
--allocation-pool start=10.0.0.200,end=10.0.0.250 sharednet1 10.0.0.0/24

Created a new subnet:
+------------------+----------------------------------------------+
| Field            | Value                                        |
+------------------+----------------------------------------------+
| allocation_pools | {"start": "10.0.0.200", "end": "10.0.0.250"} |
| cidr             | 10.0.0.0/24                                  |
| dns_nameservers  | 10.0.0.1                                     |
| enable_dhcp      | True                                         |
| gateway_ip       | 10.0.0.1                                     |
| host_routes      |                                              |
| id               | 7940c0df-c16f-4c47-853b-045682ce2b39         |
| ip_version       | 4                                            |
| name             |                                              |
| network_id       | 8291f377-18b4-4315-a397-6fdc358680d9         |
| tenant_id        | fc294b687db2410189f7c8bd81efe426             |
+------------------+----------------------------------------------+

# 設定確認

[root@dlp ~(keystone)]#
neutron net-list

+--------------------------------------+------------+--------------------------------------------------+
| id                                   | name       | subnets                                          |
+--------------------------------------+------------+--------------------------------------------------+
| 8291f377-18b4-4315-a397-6fdc358680d9 | sharednet1 | 7940c0df-c16f-4c47-853b-045682ce2b39 10.0.0.0/24 |
+--------------------------------------+------------+--------------------------------------------------+
[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=`neutron net-list | grep sharednet1 | awk '{print $2}'`

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

+--------------------------------------+---------+--------+--------+
| ID                                   | Name    | Status | Server |
+--------------------------------------+---------+--------+--------+
| 04ea6c45-c928-4df9-bb12-d3728a3d9a74 | CentOS6 | ACTIVE |        |
+--------------------------------------+---------+--------+--------+

[root@dlp ~(keystone)]#
nova boot --flavor 2 --image CentOS6 --security_group default --nic net-id=$netID CentOS_66
[root@dlp ~(keystone)]#
nova list

+-----------+-----------+--------+------------+-------------+--------------------------+
| ID        | Name      | Status | Task State | Power State | Networks                 |
+-----------+-----------+--------+------------+-------------+--------------------------+
| bbfe0a8e- | CentOS_66 | ACTIVE | -          | Running     | sharednet1=10.0.0.200    |
+-----------+-----------+--------+------------+-------------+--------------------------+
[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。
# SSH 許可

[root@dlp ~(keystone)]#
nova secgroup-add-rule default tcp 22 22 0.0.0.0/0

+-------------+-----------+---------+-----------+--------------+
| IP Protocol | From Port | To Port | IP Range  | Source Group |
+-------------+-----------+---------+-----------+--------------+
| tcp         | 22        | 22      | 0.0.0.0/0 |              |
+-------------+-----------+---------+-----------+--------------+

# ICMP 許可

[root@dlp ~(keystone)]#
nova secgroup-add-rule default icmp -1 -1 0.0.0.0/0

+-------------+-----------+---------+-----------+--------------+
| IP Protocol | From Port | To Port | IP Range  | Source Group |
+-------------+-----------+---------+-----------+--------------+
| icmp        | -1        | -1      | 0.0.0.0/0 |              |
+-------------+-----------+---------+-----------+--------------+

[root@dlp ~(keystone)]#
nova secgroup-list-rules default

+-------------+-----------+---------+-----------+--------------+
| IP Protocol | From Port | To Port | IP Range  | Source Group |
+-------------+-----------+---------+-----------+--------------+
| tcp         | 22        | 22      | 0.0.0.0/0 |              |
| icmp        | -1        | -1      | 0.0.0.0/0 |              |
+-------------+-----------+---------+-----------+--------------+
[5] インスタンスにログインします。
[root@dlp ~(keystone)]#
ssh 10.0.0.200

The authenticity of host '10.0.0.200 (10.0.0.200)' can't be established.
RSA key fingerprint is xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:76:84:a6.
Are you sure you want to continue connecting (yes/no)?
yes

Warning: Permanently added '10.0.0.200' (RSA) to the list of known hosts.
root@192.168.100.3's password:
Last login: Thu Jun 26 01:50:50 2014
[root@host-10.0.0.200 ~]#    
# ログインできた
 
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