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OpenStack Icehouse : Configure Neutron#2(Network Node)
2014/06/25
 
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 ~]#
sed -i -e "s/net.ipv4.ip_forward = 0/net.ipv4.ip_forward = 1/" /etc/sysctl.conf

[root@network ~]#
sed -i -e "s/net.ipv4.conf.default.rp_filter = 1/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.
# install from RDO, EPEL

[root@network ~]#
yum --enablerepo=openstack-icehouse,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 55: add

core_plugin = ml2
# line 64: add

service_plugins = router
# line 70: uncomment and change

auth_strategy =
keystone
# line 87: uncomment

dhcp_agent_notification = True
# line 105: uncomment

rpc_backend = neutron.openstack.common.rpc.impl_kombu
# line 118: uncomment

control_exchange = neutron
# line 134: uncomment and change (specify RabbitMQ server)

rabbit_host =
10.0.0.30
# line 136: uncomment and change (password of RabbitMQ user)

rabbit_password =
password
# line 138: uncomment

rabbit_port = 5672
# line 143: uncomment and change (RabbitMQ user)

rabbit_userid =
guest
# line 394: change like follows (auth info for Keystone)

auth_host =
10.0.0.30

auth_port = 35357
auth_protocol = http
signing_dir = $state_path/keystone-signing
admin_tenant_name =
service

admin_user =
neutron

admin_password =
servicepassword
[root@network ~]#
vi /etc/neutron/l3_agent.ini
# line 11: uncomment

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
# line 23: uncomment

use_namespaces = True
# line 47: add (it's OK to keep value empty (set it if needed))

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
# line 35: uncomment

use_namespaces = True
[root@network ~]#
vi /etc/neutron/metadata_agent.ini
# line 6: change (specify endpoint of keystone)

auth_url = http://
10.0.0.30:35357/v2.0
# line 12: change (auth info ofr keystone)

admin_tenant_name =
service

admin_user =
neutron

admin_password =
servicepassword

# line 20: uncomment and specify Nova API server

nova_metadata_ip =
10.0.0.30
# line 23: uncomment

nova_metadata_port = 8775
# line 29: 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 7: add

type_drivers = flat,vlan,gre
tenant_network_types = vlan,gre
mechanism_drivers = openvswitch
# add at the last line: uncomment & add

enable_security_group = True
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
[root@network ~]#
mv /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini.org

[root@network ~]#
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

[root@network ~]#
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini

[root@network ~]#
/etc/rc.d/init.d/openvswitch start 

/etc/openvswitch/conf.db does not exist ... (warning).
Creating empty database /etc/openvswitch/conf.db           [  OK  ]
Starting ovsdb-server                                      [  OK  ]
Configuring Open vSwitch system IDs                        [  OK  ]
Inserting openvswitch module                               [  OK  ]
Starting ovs-vswitchd                                      [  OK  ]
Enabling remote OVSDB managers                             [  OK  ]
[root@network ~]#
chkconfig openvswitch on

[root@network ~]#
ovs-vsctl add-br br-int

[root@network ~]#
for service in dhcp-agent l3-agent metadata-agent openvswitch-agent; do
/etc/rc.d/init.d/neutron-$service start
chkconfig neutron-$service on
done 

Starting neutron-dhcp-agent:                               [  OK  ]
Starting neutron-l3-agent:                                 [  OK  ]
Starting neutron-metadata-agent:                           [  OK  ]
Starting neutron-openvswitch-agent:                        [  OK  ]
 
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