Ubuntu 22.04
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OpenStack Zed : Configure Neutron OVN (Compute Node)
2022/10/07
 
Configure OpenStack Network Service (Neutron).
This example is based on the environment like follows.
Configure Neutron services with Open Virtual Network (OVN).
------------+-----------------------------+-----------------------------+------------
            |                             |                             |
        eth0|10.0.0.30                eth0|10.0.0.50                eth0|10.0.0.51
+-----------+-----------+     +-----------+-----------+     +-----------+-----------+
|   [ dlp.srv.world ]   |     | [ network.srv.world ] |     |  [ node01.srv.world ] |
|     (Control Node)    |     |     (Network Node)    |     |     (Compute Node)    |
|                       |     |                       |     |                       |
|  MariaDB    RabbitMQ  |     |      Open vSwitch     |     |        Libvirt        |
|  Memcached  Nginx     |     |     Neutron Server    |     |      Nova Compute     |
|  Keystone   httpd     |     |      OVN-Northd       |     |      Open vSwitch     |
|  Glance     Nova API  |     |         Nginx         |     |   OVN Metadata Agent  |
|                       |     |                       |     |     OVN-Controller    |
+-----------------------+     +-----------------------+     +-----------------------+

[1] Install Neutron services on Compute Node.
root@node01:~#
apt -y install neutron-common neutron-plugin-ml2 neutron-ovn-metadata-agent ovn-host openvswitch-switch
[2] Configure Neutron services.
root@node01:~#
mv /etc/neutron/neutron.conf /etc/neutron/neutron.conf.org

root@node01:~#
vi /etc/neutron/neutron.conf
# create new

[DEFAULT]
core_plugin = ml2
service_plugins = ovn-router
auth_strategy = keystone
state_path = /var/lib/neutron
allow_overlapping_ips = True
# RabbitMQ connection info
transport_url = rabbit://openstack:password@dlp.srv.world

# Keystone auth info
[keystone_authtoken]
www_authenticate_uri = https://dlp.srv.world:5000
auth_url = https://dlp.srv.world:5000
memcached_servers = dlp.srv.world:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = neutron
password = servicepassword
# if using self-signed certs on Apache2 Keystone, turn to [true]
insecure = false

[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
# create new

[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]
# IP address of Network node
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@node01:~#
chmod 640 /etc/neutron/plugins/ml2/ml2_conf.ini

root@node01:~#
chgrp neutron /etc/neutron/plugins/ml2/ml2_conf.ini
root@node01:~#
vi /etc/neutron/neutron_ovn_metadata_agent.ini
[DEFAULT]
# line 2 : add
# specify Nova API host
nova_metadata_host = dlp.srv.world
nova_metadata_protocol = https
# specify any secret key you like
metadata_proxy_shared_secret = metadata_secret

# line 231 : change
[ovs]
ovsdb_connection = tcp:127.0.0.1:6640

# line 230 : change
[agent]
root_helper = sudo neutron-rootwrap /etc/neutron/rootwrap.conf

[ovn]
# IP address of Network node
ovn_sb_connection = tcp:10.0.0.50:6642

root@node01:~#
vi /etc/default/openvswitch-switch
# line 8 : uncomment and add

OVS_CTL_OPTS=
"--ovsdb-server-options='--remote=ptcp:6640:127.0.0.1'"
root@node01:~#
vi /etc/nova/nova.conf
# add into [DEFAULT] section

vif_plugging_is_fatal = True
vif_plugging_timeout = 300

# add to the end : Neutron auth info
# the value of [metadata_proxy_shared_secret] is the same with the one in [neutron_ovn_metadata_agent.ini]
[neutron]
auth_url = https://dlp.srv.world: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
insecure = false
[3] Start Neutron services.
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] Add settings on Control Node and verify status of Neutron services.
root@dlp ~(keystone)#
vi /etc/nova/nova.conf
# add to the end : Neutron auth info
# the value of [metadata_proxy_shared_secret] is the same with the one in [neutron_ovn_metadata_agent.ini]
[neutron]
auth_url = https://dlp.srv.world: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
insecure = false

root@dlp ~(keystone)#
systemctl restart nova-api
# verify status (OK if following output is displayed)

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

+--------------------------------------+----------------------+------------------+-------------------+-------+-------+----------------------------+
| ID                                   | Agent Type           | Host             | Availability Zone | Alive | State | Binary                     |
+--------------------------------------+----------------------+------------------+-------------------+-------+-------+----------------------------+
| 0689f37d-bdd9-4650-bf7a-063f5272dce4 | OVN Controller agent | node01.srv.world |                   | :-)   | UP    | ovn-controller             |
| fe149a81-a871-5c82-ba36-5c232900baaa | OVN Metadata agent   | node01.srv.world |                   | :-)   | UP    | neutron-ovn-metadata-agent |
+--------------------------------------+----------------------+------------------+-------------------+-------+-------+----------------------------+
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