Ubuntu 20.04
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OpenStack Wallaby : Neutron OVN 設定 (Compute ノード)
2021/04/20
 
OpenStack Network Service(Neutron)の設定です。
当例では以下のような環境を例に、Open Virtual Network (OVN) を利用した Neutron ネットワークを設定します。
------------+---------------------------+---------------------------+------------
            |                           |                           |
        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     |   |     Neutron Server    |   |     Nova Compute      |
|  Keystone   Glance    |   |       OVN-Northd      |   |      Open vSwitch     |
|  Nova API             |   |                       |   |   OVN Metadata Agent  |
|                       |   |                       |   |     OVN-Controller    |
+-----------------------+   +-----------------------+   +-----------------------+

[1] Compute ノードに必要なパッケージをインストールします。
root@node01:~#
apt -y install neutron-common neutron-plugin-ml2 neutron-ovn-metadata-agent ovn-host openvswitch-switch
[2] Compute ノードの Neutron サービスの設定です。
root@node01:~#
mv /etc/neutron/neutron.conf /etc/neutron/neutron.conf.org

root@node01:~#
vi /etc/neutron/neutron.conf
# 新規作成

[DEFAULT]
core_plugin = ml2
service_plugins = ovn-router
auth_strategy = keystone
state_path = /var/lib/neutron
allow_overlapping_ips = True
# RabbitMQ 接続情報
transport_url = rabbit://openstack:password@10.0.0.30

# Keystone 認証情報
[keystone_authtoken]
www_authenticate_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:5000
memcached_servers = 10.0.0.30:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = neutron
password = servicepassword

[nova]
auth_url = http://10.0.0.30:5000
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = nova
password = servicepassword

[oslo_concurrency]
lock_path = $state_path/lock

root@node01:~#
chmod 640 /etc/neutron/neutron.conf

root@node01:~#
chgrp neutron /etc/neutron/neutron.conf
root@node01:~#
mv /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugins/ml2/ml2_conf.ini.org

root@node01:~#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# 新規作成

[DEFAULT]
debug = false

[ml2]
type_drivers = flat,geneve
tenant_network_types = geneve
mechanism_drivers = ovn
extension_drivers = port_security
overlay_ip_version = 4

[ml2_type_geneve]
vni_ranges = 1:65536
max_header_size = 38

[ml2_type_flat]
flat_networks = *

[securitygroup]
enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver

[ovn]
# Network ノードの IP アドレス
ovn_nb_connection = tcp:10.0.0.50:6641
ovn_sb_connection = tcp:10.0.0.50:6642
ovn_l3_scheduler = leastloaded
ovn_metadata_enabled = True

root@network:~#
chmod 640 /etc/neutron/plugins/ml2/ml2_conf.ini

root@network:~#
chgrp neutron /etc/neutron/plugins/ml2/ml2_conf.ini
root@node01:~#
vi /etc/neutron/neutron_ovn_metadata_agent.ini
[DEFAULT]
# 2行目 : 追記
# Nova API サーバーを指定
nova_metadata_host = 10.0.0.30
# 任意のシークレットキーを指定
metadata_proxy_shared_secret = metadata_secret

# 230行目 : 変更
[ovs]
ovsdb_connection = tcp:127.0.0.1:6640

# 最終行に追記
[agent]
root_helper = sudo neutron-rootwrap /etc/neutron/rootwrap.conf

[ovn]
# Network ノードの IP アドレス
ovn_sb_connection = tcp:10.0.0.50:6642

root@node01:~#
vi /etc/default/openvswitch-switch
# 8行目 : コメント解除して追記

OVS_CTL_OPTS=
"--ovsdb-server-options='--remote=ptcp:6640:127.0.0.1'"
root@node01:~#
vi /etc/nova/nova.conf
# [DEFAULT] セクション内の適当な場所へ追記

use_neutron = True
vif_plugging_is_fatal = True
vif_plugging_timeout = 300

# 最終行へ追記 : Neutron 認証情報
# [metadata_proxy_shared_secret] の値は [neutron_ovn_metadata_agent.ini] で指定した値
[neutron]
auth_url = http://10.0.0.30:5000
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = neutron
password = servicepassword
service_metadata_proxy = True
metadata_proxy_shared_secret = metadata_secret
[3] Neutron サービスを起動します。
root@node01:~#
systemctl restart openvswitch-switch ovn-controller ovn-host

root@node01:~#
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

root@node01:~#
systemctl restart neutron-ovn-metadata-agent

root@node01:~#
systemctl restart nova-compute
root@node01:~#
ovs-vsctl set open . external-ids:ovn-remote=tcp:10.0.0.50:6642

root@node01:~#
ovs-vsctl set open . external-ids:ovn-encap-type=geneve

root@node01:~#
ovs-vsctl set open . external-ids:ovn-encap-ip=10.0.0.51

[4] Control ノードの Nova API サービスにも設定を追記して、Neutron サービスの状態を確認します。
root@dlp ~(keystone)#
vi /etc/nova/nova.conf
# 最終行へ追記:Neutron 認証情報
# [metadata_proxy_shared_secret] の値は [neutron_ovn_metadata_agent.ini] で指定した値
[neutron]
auth_url = http://10.0.0.30:5000
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = neutron
password = servicepassword
service_metadata_proxy = True
metadata_proxy_shared_secret = metadata_secret

root@dlp ~(keystone)#
systemctl restart nova-api
# Network Agent 確認 (以下のように表示されれば OK)

root@dlp ~(keystone)#
openstack network agent list

+--------------------------------------+----------------------+------------------+-------------------+-------+-------+----------------------------+
| ID                                   | Agent Type           | Host             | Availability Zone | Alive | State | Binary                     |
+--------------------------------------+----------------------+------------------+-------------------+-------+-------+----------------------------+
| 1889d299-f487-4281-a174-5849c639525d | OVN Controller agent | node01.srv.world |                   | :-)   | UP    | ovn-controller             |
| 493c3677-1e6e-524d-b240-f366e43a88a0 | OVN Metadata agent   | node01.srv.world |                   | :-)   | UP    | neutron-ovn-metadata-agent |
+--------------------------------------+----------------------+------------------+-------------------+-------+-------+----------------------------+
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