Ubuntu 16.04
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OpenStack Newton : Configure Neutron#2 (Network Node)
2016/11/17
 
Configure OpenStack Network Service (Neutron).
For this example, Install Neutron Server on Control Node which Keystone/Glance/Nova API are already installed, and Install DHCP Agent, L3 Agent, L2 Agent, Metadata Agent on Network Node, and also Install L2 Agent on Compute Node on here. ( it's possible to install on a server as All-in-One, though, if you want )
Neutron needs a plugin software, it's possible to choose it from some softwares. This example chooses ML2 plugin. ( this example selects LinuxBridge as a backend for the plugin ) 
                                |
+------------------+            |            +------------------------+
| [ Control Node ] |            |            |    [ Network Node ]    |
|     Keystone     |10.0.0.30   |   10.0.0.50|        DHCP Agent      |
|      Glance      |------------+------------|        L3 Agent        |
|     Nova API     |eth0        |        eth0|        L2 Agent        |
|  Neutron Server  |            |            |     Metadata Agent     |
+------------------+            |            +------------------------+
                            eth0|10.0.0.51
                      +--------------------+
                      |  [ Compute Node ]  |
                      |    Nova Compute    |
                      |      L2 Agent      |
                      +--------------------+
 
Configure Network Node on here.
[1] Change Kernel parameters for IP fowarding and so on.
root@network:~#
echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf

root@network:~#
echo 'net.ipv4.conf.default.rp_filter=0' >> /etc/sysctl.conf

root@network:~#
echo 'net.ipv4.conf.all.rp_filter=0' >> /etc/sysctl.conf

root@network:~#
sysctl -p

[2] Install some packages for Network Node.
root@network:~#
apt-get -y install neutron-plugin-ml2 neutron-plugin-linuxbridge-agent neutron-l3-agent neutron-dhcp-agent neutron-metadata-agent python-neutronclient
[3] Configure as a Network node.
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
rpc_backend = rabbit

[agent]
root_helper = sudo /usr/bin/neutron-rootwrap /etc/neutron/rootwrap.conf

# Keystone auth info
[keystone_authtoken]
auth_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:35357
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

# RabbitMQ connection info
[oslo_messaging_rabbit]
rabbit_host = 10.0.0.30
rabbit_port = 5672
rabbit_userid = openstack
rabbit_password = password
root@network:~#
chmod 640 /etc/neutron/neutron.conf

root@network:~#
chgrp neutron /etc/neutron/neutron.conf

root@network:~#
vi /etc/neutron/l3_agent.ini
# line 17: add

interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver
# line 98: add (it's OK with no value (set later if need) )

external_network_bridge =
root@network:~#
vi /etc/neutron/dhcp_agent.ini
# line 17: add

interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver
# line 32: uncomment

dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
# line 41: uncomment and change

enable_isolated_metadata =
True
root@network:~#
vi /etc/neutron/metadata_agent.ini
# line 22: uncomment and specify Nova API server

nova_metadata_ip =
10.0.0.30
# line 27: uncomment

nova_metadata_port = 8775
# line 34: uncomment and specify any secret-words you like

metadata_proxy_shared_secret =
metadata_secret
root@network:~#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# line 102: add ( it's OK with no value for "tenant_network_types" (set later if need) )

[ml2]
type_drivers = flat,vlan,vxlan
tenant_network_types =
mechanism_drivers = linuxbridge,l2population
extension_drivers = port_security
# line 235: uncomment and add

enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
# last line: uncomment

enable_ipset = True
root@network:~#
vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini
# line 198: set own IP address

local_ip = 10.0.0.50
root@network:~#
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

root@network:~#
for service in l3-agent dhcp-agent metadata-agent linuxbridge-agent; do
systemctl restart neutron-$service
systemctl enable neutron-$service
done
 
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