Debian 9 Stretch
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OpenStack Newton : Configure Neutron#5 ( Compute Node )
2017/07/03
 
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 the kernel parameters for rp_filter.
root@node01:~#
modprobe br_netfilter

root@node01:~#
echo br_netfilter >> /etc/modules

root@node01:~#
echo 'net.ipv4.conf.default.rp_filter=0' >> /etc/sysctl.conf

root@node01:~#
echo 'net.ipv4.conf.all.rp_filter=0' >> /etc/sysctl.conf

root@node01:~#
echo 'net.bridge.bridge-nf-call-iptables=1' >> /etc/sysctl.conf

root@node01:~#
echo 'net.bridge.bridge-nf-call-ip6tables=1' >> /etc/sysctl.conf

root@node01:~#
sysctl -p

[2] Install Neutron services for Compute Node.
For selection during the installation, select [No] to all or input any value (because create a new conf file later).
root@node01:~#
apt -y install neutron-common neutron-plugin-openvswitch-agent
[3] Configure Compute Node.
root@node01:~#
mv /etc/neutron/neutron.conf /etc/neutron/neutron.conf.org

root@node01:~#
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@node01:~#
chmod 640 /etc/neutron/neutron.conf

root@node01:~#
chgrp neutron /etc/neutron/neutron.conf

root@node01:~#
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@node01:~#
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

root@node01:~#
vi /etc/nova/nova.conf
# add follows into [DEFAULT] section

use_neutron = True
linuxnet_interface_driver = nova.network.linux_net.LinuxOVSInterfaceDriver
firewall_driver = nova.virt.firewall.NoopFirewallDriver
vif_plugging_is_fatal = True
vif_plugging_timeout = 300
# add follows to the end: Neutron auth info

# the value of metadata_proxy_shared_secret is the same with the one in metadata_agent.ini

[neutron]
url = http://10.0.0.30:9696
auth_url = http://10.0.0.30:35357
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = neutron
password = servicepassword
service_metadata_proxy = True
metadata_proxy_shared_secret = metadata_secret
root@node01:~#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# line 99: comment out

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

local_ip = 10.0.0.51
# line 180: change (set empty now)

bridge_mappings =
root@node01:~#
ovs-vsctl add-br br-int

root@node01:~#
systemctl restart nova-compute neutron-openvswitch-agent

root@node01:~#
systemctl enable neutron-openvswitch-agent

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