Debian 9 Stretch
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OpenStack Newton : Configure Neutron#4 ( Network Node )
2017/07/02
 
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. This example chooses ML2 plugin. ( 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,L3,Metadata Agent |   |      Nova Compute     |
     |  Keystone   Glance    |   |                       |   |        L2 Agent       |
     |  Nova API             |   |                       |   |                       |
     |  Neutron Server       |   |                       |   |                       |
     +-----------------------+   +-----------------------+   +-----------------------+
[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 Neutron services for Network Node.
For selection during the installation, select [No] to all or input any value (because create a new conf file later).
root@network:~#
apt -y install neutron-plugin-openvswitch-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
# RabbitMQ connection info
transport_url = rabbit://openstack:password@10.0.0.30

[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
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 78: change (set empty now)

external_network_bridge =
root@network:~#
vi /etc/neutron/dhcp_agent.ini
# line 35: change

enable_isolated_metadata =
True
root@network:~#
vi /etc/neutron/metadata_agent.ini
# line 20: specify Nova API server

nova_metadata_ip =
10.0.0.30
# line 30: specify any secret-key you like

metadata_proxy_shared_secret =
metadata_secret
root@network:~#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# line 90: change

type_drivers =
flat,vlan,vxlan
# line 94: change (set empty now)

tenant_network_types =
root@network:~#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# line 99: comment out

#
tunnel_types = gre
# line 174: add own IP address

local_ip = 10.0.0.50
# line 180: comment out

#
bridge_mappings = external:br-ex
root@network:~#
ovs-vsctl add-br br-int

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 openvswitch-agent; do
systemctl restart neutron-$service
systemctl enable neutron-$service
done
 
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