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OpenStack Victoria : Configure Neutron OVN (Compute Node)
2020/11/26
 
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
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|    [ 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] Install Neutron services on Compute Node.
# install from Victoria, EPEL, PowerTools

[root@node01 ~]#
dnf --enablerepo=centos-openstack-victoria,PowerTools,epel -y install openstack-neutron openstack-neutron-ml2 openstack-neutron-ovn-metadata-agent ovn2.13-host
[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@10.0.0.30

# Keystone auth info
[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 ~]#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# add to the end

[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 ~]#
vi /etc/neutron/neutron_ovn_metadata_agent.ini
[DEFAULT]
# line 2: add
# specify Nova API Host
nova_metadata_host = 10.0.0.30
# specify any secret key you like
metadata_proxy_shared_secret = metadata_secret

# add to the end
[agent]
root_helper = sudo neutron-rootwrap /etc/neutron/rootwrap.conf

[ovs]
ovsdb_connection = tcp:127.0.0.1:6640

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

[root@node01 ~]#
vi /etc/sysconfig/openvswitch
# line 28: add

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

use_neutron = True
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 = 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] If SELinux is enabled, change policy.
[root@node01 ~]#
dnf --enablerepo=centos-openstack-victoria -y install openstack-selinux

[root@node01 ~]#
setsebool -P neutron_can_network on

[root@node01 ~]#
setsebool -P daemons_enable_cluster_mode on

[root@node01 ~]#
vi ovsofctl.te
# create new

module ovsofctl 1.0;

require {
        type neutron_t;
        type neutron_exec_t;
        type neutron_t;
        type dnsmasq_t;
        class file execute_no_trans;
        class capability { dac_override sys_rawio };
}

#============= neutron_t ==============
allow neutron_t self:capability { dac_override sys_rawio };
allow neutron_t neutron_exec_t:file execute_no_trans;

#============= dnsmasq_t ==============
allow dnsmasq_t self:capability dac_override;

[root@node01 ~]#
checkmodule -m -M -o ovsofctl.mod ovsofctl.te

[root@node01 ~]#
semodule_package --outfile ovsofctl.pp --module ovsofctl.mod

[root@node01 ~]#
semodule -i ovsofctl.pp

[4] Start Neutron services.
[root@node01 ~]#
systemctl enable --now openvswitch ovn-controller

[root@node01 ~]#
ovs-vsctl add-br br-int
[root@node01 ~]#
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

[root@node01 ~]#
systemctl enable --now neutron-ovn-metadata-agent

[root@node01 ~]#
systemctl restart openstack-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

[5] 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 = 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 openstack-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                     |
+--------------------------------------+----------------------+------------------+-------------------+-------+-------+----------------------------+
| adaa8b77-58b3-4de8-b402-540369c3d275 | OVN Controller agent | node01.srv.world |                   | :-)   | UP    | ovn-controller             |
| 59487ded-31e9-4883-9163-4dc7ec946310 | OVN Metadata agent   | node01.srv.world |                   | :-)   | UP    | neutron-ovn-metadata-agent |
+--------------------------------------+----------------------+------------------+-------------------+-------+-------+----------------------------+
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