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OpenStack Newton : Configure Neutron#2 (Network Node)
2016/10/23
 
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.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.
# install from Newton, EPEL

[root@network ~]#
yum --enablerepo=centos-openstack-newton,epel -y install openstack-neutron openstack-neutron-ml2 openstack-neutron-openvswitch
[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.OVSInterfaceDriver
# 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.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 27: uncomment

nova_metadata_port = 8775
# 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 102: 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 235: uncomment and add

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

enable_ipset = True
[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

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

[root@network ~]#
vi neutron_pol.te
# create new

module neutron_pol 1.0;

require {
        type sysfs_t;
        type http_port_t;
        type neutron_t;
        type neutron_tmp_t;
        type ovsdb_port_t;
        type openvswitch_t;
        type openflow_port_t;
        class sock_file { create write unlink getattr setattr };
        class tcp_socket { name_bind name_connect };
        class filesystem getattr;
}

#============= neutron_t ==============
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 ovsdb_port_t:tcp_socket name_bind;
[root@network ~]#
checkmodule -m -M -o neutron_pol.mod neutron_pol.te

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

[root@network ~]#
semodule -i neutron_pol.pp

 
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