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OpenStack Ocata : Configure Neutron#4 (Network Node)
2017/02/28
 
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    |   |                       |   |      Open vSwitch     |
     |  Nova API             |   |                       |   |        L2 Agent       |
     |  Neutron Server       |   |                       |   |                       |
     +-----------------------+   +-----------------------+   +-----------------------+
[1] Install Neutron services on Network Node.
# install from Ocata, EPEL

[root@network ~]#
yum --enablerepo=centos-openstack-ocata,epel -y install openstack-neutron openstack-neutron-ml2 openstack-neutron-openvswitch
[2] 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

# 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 17: add

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
# line 100: 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.OVSInterfaceDriver
# 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 34: 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 114: add ( 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,l2population
extension_drivers = port_security
# line 247: uncomment and add

enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
# end line: uncomment

enable_ipset = True
[3] If SELinux is enabled, change policy like follows.
[root@network ~]#
setsebool -P neutron_can_network on

[root@network ~]#
vi neutron-net_pol.te
# create new

module neutron-net_pol 1.0;

require {
        type sysfs_t;
        type http_port_t;
        type neutron_t;
        type neutron_tmp_t;
        type hostname_exec_t;
        type ovsdb_port_t;
        type openvswitch_t;
        type openflow_port_t;
        class file { execute execute_no_trans getattr open read };
        class dir search;
        class sock_file { create write unlink getattr setattr };
        class tcp_socket { name_bind name_connect };
        class filesystem getattr;
}

#============= neutron_t ==============
allow neutron_t neutron_tmp_t:sock_file create;
allow neutron_t http_port_t:tcp_socket name_bind;
allow neutron_t sysfs_t:filesystem getattr;
allow neutron_t neutron_tmp_t:sock_file { create write getattr unlink setattr };
allow neutron_t openflow_port_t:tcp_socket name_bind;

#============= openvswitch_t ==============
allow openvswitch_t neutron_t:file { getattr open read };
allow openvswitch_t ovsdb_port_t:tcp_socket name_bind;
allow openvswitch_t hostname_exec_t:file { execute execute_no_trans getattr open read };
allow openvswitch_t neutron_t:dir search;
[root@network ~]#
checkmodule -m -M -o neutron-net_pol.mod neutron-net_pol.te

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

[root@network ~]#
semodule -i neutron-net_pol.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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