CentOS 7
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OpenStack Train : Configure Neutron#4 (Network Node)2019/10/25

 
Configure OpenStack Network Service (Neutron).
This example is not All in One Settings like here, but Configure the 3 Nodes environment like follows.
Neutron needs a plugin software, it's possible to choose it from some softwares.
It selects ML2 plugin on this example. ( it uses Open vSwitch under the backend )
------------+---------------------------+---------------------------+------------
            |                           |                           |
        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       |   |                       |   |                       |
+-----------------------+   +-----------------------+   +-----------------------+

[1] Install Neutron services on Network Node.
# install from Train, EPEL

[root@network ~]#
yum --enablerepo=centos-openstack-train,epel -y install openstack-neutron openstack-neutron-ml2 openstack-neutron-openvswitch libibverbs
[2] Configure Neutron servides.
[root@network ~]#
mv /etc/neutron/neutron.conf /etc/neutron/neutron.conf.org

[root@network ~]#
vi /etc/neutron/neutron.conf
# create new

[DEFAULT]
core_plugin = ml2
service_plugins = 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

[oslo_concurrency]
lock_path = $state_path/lock

[root@network ~]#
chmod 640 /etc/neutron/neutron.conf

[root@network ~]#
chgrp neutron /etc/neutron/neutron.conf

[root@network ~]#
vi /etc/neutron/l3_agent.ini
[DEFAULT]
# line 2: add

interface_driver = openvswitch
[root@network ~]#
vi /etc/neutron/dhcp_agent.ini
[DEFAULT]
# line 2: add

interface_driver = openvswitch
dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
enable_isolated_metadata = true
[root@network ~]#
vi /etc/neutron/metadata_agent.ini
[DEFAULT]
# line 2: add

# specify Nova API server

nova_metadata_host = 10.0.0.30
# specify any secret key you like

metadata_proxy_shared_secret = metadata_secret
# line 212: uncomment and specify Memcache server

memcache_servers =
10.0.0.30:11211
[root@network ~]#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# add to the end (it's OK with no value for [tenant_network_types] (set later if need))

[ml2]
type_drivers = flat,vlan,gre,vxlan
tenant_network_types =
mechanism_drivers = openvswitch
extension_drivers = port_security
[root@network ~]#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# add to the end

[securitygroup]
firewall_driver = openvswitch
enable_security_group = true
enable_ipset = true
[3] If SELinux is enabled, change policy like follows.
[root@network ~]#
yum --enablerepo=centos-openstack-train -y install openstack-selinux

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

[root@network ~]#
setsebool -P haproxy_connect_any on

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

[root@network ~]#
vi my-ovsofctl.te
# create new

module my-ovsofctl 1.0;

require {
        type neutron_t;
        class capability sys_rawio;
}

#============= neutron_t ==============
allow neutron_t self:capability sys_rawio;

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

checkmodule: loading policy configuration from my-ovsofctl.te
checkmodule: policy configuration loaded
checkmodule: writing binary representation (version 17) to my-ovsofctl.mod
[root@network ~]#
semodule_package --outfile my-ovsofctl.pp --module my-ovsofctl.mod

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

[4] Start Neutron services.
[root@network ~]#
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

[root@network ~]#
systemctl start openvswitch

[root@network ~]#
systemctl enable openvswitch

[root@network ~]#
ovs-vsctl add-br br-int

[root@network ~]#
for service in dhcp-agent l3-agent metadata-agent openvswitch-agent; do
systemctl start neutron-$service
systemctl enable neutron-$service
done

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