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OpenStack Liberty : Configure Neutron(Network Node)
2015/11/15
 
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 Liberty, EPEL

[root@network ~]#
yum --enablerepo=centos-openstack-liberty,epel -y install openstack-neutron openstack-neutron-ml2 openstack-neutron-openvswitch
[3] Configure as a Network node.
[root@network ~]#
vi /etc/neutron/neutron.conf
# line 62: add

core_plugin = ml2
# line 79: add

service_plugins = router
# line 92: uncomment and change

auth_strategy =
keystone
# line 132: uncomment

allow_overlapping_ips = True
# line 573: uncomment

rpc_backend = rabbit
# line 717: comment out and add lines under them (Keystone auth info)

[keystone_authtoken]
#
auth_uri = http://127.0.0.1:35357/v2.0/
#
identity_uri = http://127.0.0.1:5000
#
admin_tenant_name = %SERVICE_TENANT_NAME%
#
admin_user = %SERVICE_USER%
#
admin_password = %SERVICE_PASSWORD%
auth_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:35357
auth_plugin = password
project_domain_id = default
user_domain_id = default
project_name = service
username = neutron
password = servicepassword
# line 947: add (MariaDB connection info)

[oslo_messaging_rabbit]
rabbit_host = 10.0.0.30
rabbit_port = 5672
rabbit_userid = guest
rabbit_password = password
[root@network ~]#
vi /etc/neutron/l3_agent.ini
# line 11: uncomment

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
# line 69: add (it's OK with no value (set later if need) )

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
[root@network ~]#
vi /etc/neutron/metadata_agent.ini
# line 6,7: comment out

#
auth_url = http://localhost:5000/v2.0
#
auth_region = RegionOne
# line 12-14: comment out and add follows under them

#
admin_tenant_name = %SERVICE_TENANT_NAME%
#
admin_user = %SERVICE_USER%
#
admin_password = %SERVICE_PASSWORD%
auth_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:35357
auth_region = RegionOne
auth_plugin = password
project_domain_id = default
user_domain_id = default
project_name = service
username = neutron
password = servicepassword
# line 28: uncomment and specify Nova API server

nova_metadata_ip =
10.0.0.30
# line 31: uncomment

nova_metadata_port = 8775
# line 51: uncomment and specify secret key you like

metadata_proxy_shared_secret =
metadata_secret
[root@network ~]#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# line 7: add ( it's OK with no value for "tenant_network_types" (set later if need) )

type_drivers = flat,vlan,gre,vxlan
tenant_network_types =
mechanism_drivers = openvswitch
# line 118: uncomment and add

enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
# bottom 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

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