I. Database Configuration

# mysql -uroot -p123456
MariaDB [(none)]> create database neutron;
MariaDB [(none)]> grant all privileges on neutron.* to 'neutron'@'localhost' identified by '123456';
MariaDB [(none)]> grant all privileges on neutron.* to 'neutron'@'%' identified by '123456';
MariaDB [(none)]> exit

Creating service credentials and API endpoints

1. Effective environmental variables

# . admin-openrc

2. Create service credentials

# openstack user create --domain default --password-prompt neutron
# openstack role add --project service --user neutron admin
# openstack service create --name neutron --description "OpenStack Networking" network

3. Create API endpoints

# openstack endpoint create --region RegionOne network public http://controller:9696
# openstack endpoint create --region RegionOne network internal http://controller:9696
# openstack endpoint create --region RegionOne network admin http://controller:9696

Controller Node - Install and Configure Neutron Components

1. Installation of Neutron packages

# yum install -y openstack-neutron openstack-neutron-ml2 openstack-neutron-linuxbridge ebtables

2. Configuring the components required for Neutron
1) Edit/etc/neutron/neutron.conf file

# vi /etc/neutron/neutron.conf
[DEFAULT]
core_plugin = ml2
service_plugins = router
allow_overlapping_ips = True
rpc_backend = rabbit
auth_strategy = keystone
notify_nova_on_port_status_changes = True
notify_nova_on_port_data_changes = True

[database]
connection = mysql+pymysql://neutron:123456@controller/neutron

[oslo_messaging_rabbit]
rabbit_host = controller
rabbit_userid = openstack
rabbit_password = 123456

[nova]
auth_url = http://controller:35357
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = nova
password = 123456

[oslo_concurrency]
lock_path = /var/lib/neutron/tmp

2) Edit/etc/neutron/plugins/ml2/ml2_conf.ini file

# vi /etc/neutron/plugins/ml2/ml2_conf.ini
[ml2]
type_drivers = flat,vlan,vxlan
tenant_network_types = vxlan
mechanism_drivers = linuxbridge,l2population
extension_drivers = port_security

[ml2_type_flat]
flat_networks = provider

[ml2_type_vxlan]
vni_ranges = 1:1000

[securitygroup]
enable_ipset = True

3) Edit/etc/neutron/plugins/ml2/linuxbridge_agent.ini file

# vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
[linux_bridge]
physical_interface_mappings = provider:eno33554960(The name of the external network card of the physical machine)

[vxlan]
enable_vxlan = True
local_ip = 192.168.100.10
l2_population = True

[securitygroup]
enable_security_group = True
firewall_driver = neutron.virt.firewall.NoopFirewallDriver

4) Edit/etc/neutron/l3_agent.ini file
Note: external_network_bridge = null

# vi /etc/neutron/l3_agent.ini
[DEFAULT]
interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver
external_network_bridge =       

5) Edit/etc/neutron/dhcp_agent.ini file

# vi /etc/neutron/dhcp_agent.ini
[DEFAULT]
interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver
dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
enable_isolated_metadata = True

6) Edit / etc/neutron/metadata_agent.ini file
Note: metadata proxy key, custom

# vi /etc/neutron/metadata_agent.ini
[DEFAULT]
nova_metadata_ip = controller
metadata_proxy_shared_secret = 123456 

7) Edit/etc/nova/nova.conf file
Note: metadata_proxy_shared_secret is the metadata proxy key just set

# vi /etc/nova/nova.conf
[neutron]
url = http://controller:9696
auth_url = http://controller:35357
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = neutron
password = 123456
service_metadata_proxy = True
metadata_proxy_shared_secret = 123456

3. Create soft links

# ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

4. Synchronized database

# su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file \
  /etc/neutron/plugins/ml2/ml2_conf.ini upgrade head" neutron

5. Start Nutron Service and Set Boot-Up Self-Start

# systemctl restart openstack-nova-api.service
# systemctl start neutron-server.service neutron-linuxbridge-agent.service \
  neutron-dhcp-agent.service neutron-metadata-agent.service neutron-l3-agent.service
# systemctl enable neutron-server.service neutron-linuxbridge-agent.service \
  neutron-dhcp-agent.service neutron-metadata-agent.service neutron-l3-agent.service

Compute Node - Install and Configure Neutron Components

1. Packages needed to install Neutron components

# yum install -y openstack-neutron-linuxbridge ebtables ipset

2. Configuring the components required for Neutron
1) Edit/etc/neutron/neutron.conf file

# vi /etc/neutron/neutron.conf
[DEFAULT]
rpc_backend = rabbit
auth_strategy = keystone

[oslo_messaging_rabbit]
rabbit_host = controller
rabbit_userid = openstack
rabbit_password = 123456

[keystone_authtoken]
auth_uri = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = neutron
password = 123456

[oslo_concurrency]
lock_path = /var/lib/neutron/tmp

2) Edit/etc/neutron/plugins/ml2/linuxbridge_agent.ini file

# vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
[linux_bridge]
physical_interface_mappings = provider:eno33554960

[vxlan]
enable_vxlan = True
local_ip = 192.168.100.20
l2_population = True

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

3) Editing/etc/nova/nova.conf file

# vi /etc/nova/nova.conf
[neutron]
url = http://controller:9696
auth_url = http://controller:35357
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = neutron
password = 123456

3. Start Neutron Service and Set Boot-Up Self-Start

# systemctl restart openstack-nova-compute.service
# systemctl enable neutron-linuxbridge-agent.service
# systemctl start neutron-linuxbridge-agent.service

V. Verification of Neutron Services

# . admin-openrc
# neutron ext-list

# neutron agent-list