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OpenStack Pike : Neutron ネットワークを構成する (VXLAN)
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、VXLAN 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

[1] Control ノードで以下のように設定変更します。
[root@dlp ~(keystone)]#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# 115行目:tenant_network_types に値を追記

[ml2]
type_drivers = flat,vlan,gre,vxlan
tenant_network_types =
vxlan
# 166行目:追記

[ml2_type_flat]
flat_networks = physnet1
# 220行目:追記

[ml2_type_vxlan]
vni_ranges = 1:1000
[root@dlp ~(keystone)]#
systemctl restart neutron-server

[2] Network ノードで以下のように設定変更します。
# 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
# 115行目:tenant_network_types に値を追記

[ml2]
type_drivers = flat,vlan,gre,vxlan
tenant_network_types =
vxlan
# 166行目:追記

[ml2_type_flat]
flat_networks = physnet1
# 220行目:追記

[ml2_type_vxlan]
vni_ranges = 1:1000
[root@network ~]#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# 114行目:追記

[agent]
tunnel_types = vxlan
l2_population = True
prevent_arp_spoofing = True
# 182行目:追記 ( local_ip はこのノードのローカルIPを指定)

[ovs]
local_ip = 10.0.0.50
bridge_mappings = physnet1:br-eth1
[root@network ~]#
for service in dhcp-agent l3-agent metadata-agent openvswitch-agent; do
systemctl restart neutron-$service
done
# Firewalld 稼働中の場合は停止

[root@network ~]#
systemctl stop firewalld

[root@network ~]#
systemctl disable firewalld

[3] Compute ノードで以下のように設定変更します。
[root@node01 ~]#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# 115行目:tenant_network_types に値を追記

[ml2]
type_drivers = flat,vlan,gre,vxlan
tenant_network_types =
vxlan
# 166行目:追記

[ml2_type_flat]
flat_networks = physnet1
# 220行目:追記

[ml2_type_vxlan]
vni_ranges = 1:1000
[root@node01 ~]#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# 114行目:追記

[agent]
tunnel_types = vxlan
l2_population = True
prevent_arp_spoofing = True
# 182行目:追記 ( local_ip はこのノードのローカルIPを指定)

[ovs]
local_ip = 10.0.0.51
[root@node01 ~]#
systemctl restart neutron-openvswitch-agent
# Firewalld 稼働中の場合は停止

[root@node01 ~]#
systemctl stop firewalld

[root@node01 ~]#
systemctl disable firewalld

[4] 仮想ルータを作成します。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。
# 仮想ルーター作成

[root@dlp ~(keystone)]#
openstack router create router01

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| admin_state_up          | UP                                   |
| availability_zone_hints |                                      |
| availability_zones      |                                      |
| created_at              | 2017-09-06T07:49:37Z                 |
| description             |                                      |
| distributed             | False                                |
| external_gateway_info   | None                                 |
| flavor_id               | None                                 |
| ha                      | False                                |
| id                      | 1408558e-f10e-4c37-af33-f302f048a44c |
| name                    | router01                             |
| project_id              | 09158bee8c6441519bf3a3743d936566     |
| revision_number         | None                                 |
| routes                  |                                      |
| status                  | ACTIVE                               |
| tags                    |                                      |
| updated_at              | 2017-09-06T07:49:37Z                 |
+-------------------------+--------------------------------------+
[5] 内部用のネットワークを作成し、仮想ルーターに関連付けます。
# 内部用ネットワーク作成

[root@dlp ~(keystone)]#
openstack network create int_net --provider-network-type vxlan

+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | UP                                   |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2017-09-06T07:49:58Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | b70e8cdc-8c61-4a3b-8dfc-060cba8f82f9 |
| ipv4_address_scope        | None                                 |
| ipv6_address_scope        | None                                 |
| is_default                | False                                |
| is_vlan_transparent       | None                                 |
| mtu                       | 1450                                 |
| name                      | int_net                              |
| port_security_enabled     | True                                 |
| project_id                | 09158bee8c6441519bf3a3743d936566     |
| provider:network_type     | vxlan                                |
| provider:physical_network | None                                 |
| provider:segmentation_id  | 89                                   |
| qos_policy_id             | None                                 |
| revision_number           | 2                                    |
| router:external           | Internal                             |
| segments                  | None                                 |
| shared                    | False                                |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      |                                      |
| updated_at                | 2017-09-06T07:49:58Z                 |
+---------------------------+--------------------------------------+

# 内部用ネットワークにサブネット作成

[root@dlp ~(keystone)]#
openstack subnet create subnet1 --network int_net \
--subnet-range 192.168.100.0/24 --gateway 192.168.100.1 \
--dns-nameserver 10.0.0.10

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| allocation_pools        | 192.168.100.2-192.168.100.254        |
| cidr                    | 192.168.100.0/24                     |
| created_at              | 2017-09-06T07:50:25Z                 |
| description             |                                      |
| dns_nameservers         | 10.0.0.10                            |
| enable_dhcp             | True                                 |
| gateway_ip              | 192.168.100.1                        |
| host_routes             |                                      |
| id                      | 3627d5d7-8196-469f-897e-2159f695052a |
| ip_version              | 4                                    |
| ipv6_address_mode       | None                                 |
| ipv6_ra_mode            | None                                 |
| name                    | subnet1                              |
| network_id              | b70e8cdc-8c61-4a3b-8dfc-060cba8f82f9 |
| project_id              | 09158bee8c6441519bf3a3743d936566     |
| revision_number         | 0                                    |
| segment_id              | None                                 |
| service_types           |                                      |
| subnetpool_id           | None                                 |
| tags                    |                                      |
| updated_at              | 2017-09-06T07:50:25Z                 |
| use_default_subnet_pool | None                                 |
+-------------------------+--------------------------------------+

# 仮想ルーターに内部ネットワークを設定

[root@dlp ~(keystone)]#
openstack router add subnet router01 subnet1
[6] 外部接続用のネットワークを作成し、仮想ルーターに関連付けます。
# 外部用ネットワーク作成

[root@dlp ~(keystone)]#
openstack network create \
--provider-physical-network physnet1 \
--provider-network-type flat --external ext_net

+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | UP                                   |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2017-09-06T07:51:02Z                 |
| description               |                                      |
| dns_domain                | None                                 |
| id                        | e27d7f02-773f-4e11-8aa9-e70ebc05ab76 |
| ipv4_address_scope        | None                                 |
| ipv6_address_scope        | None                                 |
| is_default                | False                                |
| is_vlan_transparent       | None                                 |
| mtu                       | 1500                                 |
| name                      | ext_net                              |
| port_security_enabled     | True                                 |
| project_id                | 09158bee8c6441519bf3a3743d936566     |
| provider:network_type     | flat                                 |
| provider:physical_network | physnet1                             |
| provider:segmentation_id  | None                                 |
| qos_policy_id             | None                                 |
| revision_number           | 3                                    |
| router:external           | External                             |
| segments                  | None                                 |
| shared                    | False                                |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      |                                      |
| updated_at                | 2017-09-06T07:51:02Z                 |
+---------------------------+--------------------------------------+

# 外部用ネットワークにサブネット作成

[root@dlp ~(keystone)]#
openstack subnet create subnet2 \
--network ext_net --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 --no-dhcp

+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| allocation_pools        | 10.0.0.200-10.0.0.254                |
| cidr                    | 10.0.0.0/24                          |
| created_at              | 2017-09-06T07:51:24Z                 |
| description             |                                      |
| dns_nameservers         | 10.0.0.10                            |
| enable_dhcp             | False                                |
| gateway_ip              | 10.0.0.1                             |
| host_routes             |                                      |
| id                      | 85f3a6a0-07ab-493d-91a3-cd60ecd908c7 |
| ip_version              | 4                                    |
| ipv6_address_mode       | None                                 |
| ipv6_ra_mode            | None                                 |
| name                    | subnet2                              |
| network_id              | e27d7f02-773f-4e11-8aa9-e70ebc05ab76 |
| project_id              | 09158bee8c6441519bf3a3743d936566     |
| revision_number         | 0                                    |
| segment_id              | None                                 |
| service_types           |                                      |
| subnetpool_id           | None                                 |
| tags                    |                                      |
| updated_at              | 2017-09-06T07:51:24Z                 |
| use_default_subnet_pool | None                                 |
+-------------------------+--------------------------------------+

# 仮想ルーターにゲートウェイを設定

[root@dlp ~(keystone)]#
openstack router set router01 --external-gateway ext_net

[7] 内部ネットワークを関連付けた仮想マシンインスタンスを作成して起動します。
[root@dlp ~(keystone)]#
Int_Net_ID=`openstack network list | grep int_net | 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 | 35:15:20:3f:b9:51:9e:b3:91:41:6a:ac:91:30:3d:22 |
| name        | mykey                                           |
| user_id     | 09d8dfa20e0f40eaae448d369943b195                |
+-------------+-------------------------------------------------+

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

+--------------------------------------+----------+--------+-----------------------+---------+----------+
| ID                                   | Name     | Status | Networks              | Image   | Flavor   |
+--------------------------------------+----------+--------+-----------------------+---------+----------+
| 4f43ccb8-68b0-4406-9c4d-46990285cf8e | CentOS_7 | ACTIVE | int_net=192.168.100.7 | CentOS7 | m1.small |
+--------------------------------------+----------+--------+-----------------------+---------+----------+
[8] 作成した仮想マシンインスタンスにフローティングIP を割り当てます。
[root@dlp ~(keystone)]#
openstack floating ip create ext_net

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| created_at          | 2017-09-06T07:55:10Z                 |
| description         |                                      |
| fixed_ip_address    | None                                 |
| floating_ip_address | 10.0.0.201                           |
| floating_network_id | e27d7f02-773f-4e11-8aa9-e70ebc05ab76 |
| id                  | af5feb8b-2d11-42ea-9ea4-f0df0886e255 |
| name                | 10.0.0.201                           |
| port_id             | None                                 |
| project_id          | 09158bee8c6441519bf3a3743d936566     |
| revision_number     | 0                                    |
| router_id           | None                                 |
| status              | DOWN                                 |
| updated_at          | 2017-09-06T07:55:10Z                 |
+---------------------+--------------------------------------+

[root@dlp ~(keystone)]#
openstack server add floating ip CentOS_7 10.0.0.201

# 設定確認

[root@dlp ~(keystone)]#
openstack floating ip show 10.0.0.201

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| created_at          | 2017-09-06T07:55:10Z                 |
| description         |                                      |
| fixed_ip_address    | 192.168.100.7                        |
| floating_ip_address | 10.0.0.201                           |
| floating_network_id | e27d7f02-773f-4e11-8aa9-e70ebc05ab76 |
| id                  | af5feb8b-2d11-42ea-9ea4-f0df0886e255 |
| name                | 10.0.0.201                           |
| port_id             | cf1722ca-84b9-4857-9791-dfa9fa71991a |
| project_id          | 09158bee8c6441519bf3a3743d936566     |
| revision_number     | 1                                    |
| router_id           | 1408558e-f10e-4c37-af33-f302f048a44c |
| status              | ACTIVE                               |
| updated_at          | 2017-09-06T07:55:29Z                 |
+---------------------+--------------------------------------+

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

+-----------+----------+--------+-----------------------------------+---------+----------+
| ID        | Name     | Status | Networks                          | Image   | Flavor   |
+-----------+----------+--------+-----------------------------------+---------+----------+
| 4f43ccb8- | CentOS_7 | ACTIVE | int_net=192.168.100.7, 10.0.0.201 | CentOS7 | m1.small |
+-----------+----------+--------+-----------------------------------+---------+----------+
[9] 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

+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2017-09-06T07:56:43Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | 912d420b-074e-4385-b0c9-6614ae0ccef6 |
| 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 | 223c2ca2-ee19-45e8-8d90-24c785c69624 |
| updated_at        | 2017-09-06T07:56:43Z                 |
+-------------------+--------------------------------------+

# SSH 許可

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

+-------------------+--------------------------------------+
| Field             | Value                                |
+-------------------+--------------------------------------+
| created_at        | 2017-09-06T07:56:57Z                 |
| description       |                                      |
| direction         | ingress                              |
| ether_type        | IPv4                                 |
| id                | 1c12b037-2620-42a4-af36-b66016c06778 |
| 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 | 223c2ca2-ee19-45e8-8d90-24c785c69624 |
| updated_at        | 2017-09-06T07:56:57Z                 |
+-------------------+--------------------------------------+

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

+--------------+-------------+-----------+------------+-----------------------------+-------------------+
| ID           | IP Protocol | IP Range  | Port Range | Remote Security Group       | Security Group    |
+--------------+-------------+-----------+------------+-----------------------------+-------------------+
| 1c12b037-... | tcp         | 0.0.0.0/0 | 22:22      | None                        | 223c2ca2-ee19-... |
| 4678dc3a-... | None        | None      |            | 223c2ca2-ee19-45e8-8d90-... | 223c2ca2-ee19-... |
| 46e00d97-... | None        | None      |            | None                        | 223c2ca2-ee19-... |
| 6c315c95-... | None        | None      |            | 223c2ca2-ee19-45e8-8d90-... | 223c2ca2-ee19-... |
| 7673b04c-... | None        | None      |            | None                        | 223c2ca2-ee19-... |
| 912d420b-... | icmp        | 0.0.0.0/0 |            | None                        | 223c2ca2-ee19-... |
+--------------+-------------+-----------+------------+-----------------------------+-------------------+
[10] 仮想マシンインスタンスに割りあてられたフローティング IP 宛てに SSH 接続することで、インスタンスにログインできます。
[root@dlp ~(keystone)]#
openstack server list

+-----------+----------+--------+-----------------------------------+---------+----------+
| ID        | Name     | Status | Networks                          | Image   | Flavor   |
+-----------+----------+--------+-----------------------------------+---------+----------+
| 4f43ccb8- | CentOS_7 | ACTIVE | int_net=192.168.100.7, 10.0.0.201 | CentOS7 | m1.small |
+-----------+----------+--------+-----------------------------------+---------+----------+

[root@dlp ~(keystone)]#
ssh centos@10.0.0.201

The authenticity of host '10.0.0.201 (10.0.0.201)' 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 '10.0.0.201' (ECDSA) to the list of known hosts.
[centos@centos-7 ~]$    
# ログインできた
 
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