Ubuntu 14.04
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OpenStack Icehouse : Configure Neutron#2 (Network Node)
2014/05/23
 
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. ( it uses Open vSwitch under the backend ) 
                                |
+------------------+            |            +------------------------+
| [ 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.all.rp_filter=0' >> /etc/sysctl.conf

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

root@network:~#
sysctl -p

net.ipv4.ip_forward = 1
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.default.rp_filter = 0
[2] Install some packages for Network.
root@network:~#
apt-get -y install neutron-plugin-ml2 neutron-plugin-openvswitch-agent neutron-l3-agent neutron-dhcp-agent
[3] Configure as a Network node.
root@network:~#
vi /etc/neutron/neutron.conf
# line 53: uncomment

core_plugin = neutron.plugins.ml2.plugin.Ml2Plugin
# line 64: add

service_plugins = neutron.services.l3_router.l3_router_plugin.L3RouterPlugin
# line 70: uncomment

auth_strategy = keystone
# line 105: uncomment

rpc_backend = neutron.openstack.common.rpc.impl_kombu
# line 118: uncomment

control_exchange = neutron
# line 134: uncomment and change (specify RabbitMQ server)

rabbit_host =
10.0.0.30
# line 136: uncomment and change (password of RabbitMQ user)

rabbit_password =
password
# line 138: uncomment

rabbit_port = 5672
# line 143: uncomment and change (RabbitMQ user)

rabbit_userid =
guest
# line 394: change like follows (auth info for Keystone)

auth_host =
10.0.0.30

auth_port = 35357
auth_protocol = http
signing_dir = $state_path/keystone-signing
admin_tenant_name =
service

admin_user =
neutron

admin_password =
servicepassword

signing_dir = $state_path/keystone-signing
# line 409: comment out

#
connection = sqlite:////var/lib/neutron/neutron.sqlite
# line 454: comment out

#
service_provider=LOADBALANCER:Haproxy:neutron.services.loadbalancer.
drivers.haproxy.plugin_driver.HaproxyOnHostPluginDriver:default
root@network:~#
vi /etc/neutron/l3_agent.ini
# line 11: uncomment

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
# line 23: uncomment

use_namespaces = True
# line 47: add (it's OK to keep value empty (set it if needed))

external_network_bridge =
root@network:~#
vi /etc/neutron/dhcp_agent.ini
# line 16: uncomment

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
# line 31: uncomment

dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
# line 35: uncomment

use_namespaces = True
root@network:~#
vi /etc/neutron/metadata_agent.ini
# line 6: change (specify endpoint of keystone)

auth_url = http://
10.0.0.30:35357/v2.0
# line 12: change (auth info ofr keystone)

admin_tenant_name =
service

admin_user =
neutron

admin_password =
servicepassword

# line 20: uncomment and specify Nova API server

nova_metadata_ip =
10.0.0.30
# line 23: uncomment

nova_metadata_port = 8775
# line 29: uncomment and specify any secret key you like

metadata_proxy_shared_secret =
metadata_secret
root@network:~#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# line 7: add

type_drivers = flat,vlan,gre
tenant_network_types = vlan,gre
mechanism_drivers = openvswitch
# add at the last line: uncomment & add

enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
root@network:~#
service openvswitch-switch restart

openvswitch-switch stop/waiting
openvswitch-switch start/running
root@network:~#
ovs-vsctl add-br br-int

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

neutron-l3-agent stop/waiting
neutron-l3-agent start/running, process 9609
neutron-dhcp-agent stop/waiting
neutron-dhcp-agent start/running, process 9630
neutron-metadata-agent stop/waiting
neutron-metadata-agent start/running, process 9643
neutron-plugin-openvswitch-agent stop/waiting
neutron-plugin-openvswitch-agent start/running, process 9659
 
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