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OpenStack Queens : Configure Neutron#2
2018/03/05
 
Configure OpenStack Network Service (Neutron).
This example is based on the emvironment like follows.
If you'd like to install Neutron services on another Computer, refer to here.
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 
          +-----------+-----------+
          |    [ Control Node ]   |
          |                       |
          |  MariaDB    RabbitMQ  |
          |  Memcached  httpd     |
          |  Keystone   Glance    |
          |   Nova API,Compute    |
          |    Neutron Server     |
          |  L2,L3,Metadata Agent |
          +-----------------------+

[1] Install Neutron services.
# install from Queens, EPEL

[root@dlp ~(keystone)]#
yum --enablerepo=centos-openstack-queens,epel -y install openstack-neutron openstack-neutron-ml2 openstack-neutron-openvswitch
[2] Configure Neutron.
[root@dlp ~(keystone)]#
mv /etc/neutron/neutron.conf /etc/neutron/neutron.conf.org

[root@dlp ~(keystone)]#
vi /etc/neutron/neutron.conf
# create new

[DEFAULT]
core_plugin = ml2
service_plugins = router
auth_strategy = keystone
state_path = /var/lib/neutron
dhcp_agent_notification = True
allow_overlapping_ips = True
notify_nova_on_port_status_changes = True
notify_nova_on_port_data_changes = True
# RabbitMQ connection info
transport_url = rabbit://openstack:password@10.0.0.30

# Keystone auth info
[keystone_authtoken]
www_authenticate_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:5000
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

# MariaDB connection info
[database]
connection = mysql+pymysql://neutron:password@10.0.0.30/neutron_ml2

# Nova connection info
[nova]
auth_url = http://10.0.0.30:5000
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = nova
password = servicepassword

[oslo_concurrency]
lock_path = $state_path/tmp

[root@dlp ~(keystone)]#
chmod 640 /etc/neutron/neutron.conf

[root@dlp ~(keystone)]#
chgrp neutron /etc/neutron/neutron.conf

[root@dlp ~(keystone)]#
vi /etc/neutron/l3_agent.ini
# line 17: add

interface_driver = openvswitch
[root@dlp ~(keystone)]#
vi /etc/neutron/dhcp_agent.ini
# line 17: add

interface_driver = openvswitch
# line 28: uncomment

dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
# line 37: uncomment and change

enable_isolated_metadata =
true
[root@dlp ~(keystone)]#
vi /etc/neutron/metadata_agent.ini
# line 22: uncomment and specify Nova API server

nova_metadata_host =
10.0.0.30
# line 34: uncomment and specify any secret key you like

metadata_proxy_shared_secret =
metadata_secret
# line 260: uncomment and specify Memcache server

memcache_servers =
10.0.0.30:11211
[root@dlp ~(keystone)]#
vi /etc/neutron/plugins/ml2/ml2_conf.ini
# line 129: 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
[root@dlp ~(keystone)]#
vi /etc/neutron/plugins/ml2/openvswitch_agent.ini
# line 308: add

[securitygroup]
firewall_driver = openvswitch
enable_security_group = true
enable_ipset = true
[root@dlp ~(keystone)]#
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]
auth_url = http://10.0.0.30:5000
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
[3] If SELinux is enabled, change policy like follows.
[root@dlp ~(keystone)]#
setsebool -P neutron_can_network on

[root@dlp ~(keystone)]#
setsebool -P haproxy_connect_any on

[root@dlp ~(keystone)]#
setsebool -P daemons_enable_cluster_mode on

[root@dlp ~(keystone)]#
yum --enablerepo=centos-openstack-queens -y install openstack-selinux

[4] If Firewalld is running, allow service ports.
[root@dlp ~(keystone)]#
firewall-cmd --add-port=9696/tcp --permanent

success
[root@dlp ~(keystone)]#
firewall-cmd --reload

success
[5] Start Neutron services.
[root@dlp ~(keystone)]#
systemctl start openvswitch

[root@dlp ~(keystone)]#
systemctl enable openvswitch

[root@dlp ~(keystone)]#
ovs-vsctl add-br br-int
[root@dlp ~(keystone)]#
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini

[root@dlp ~(keystone)]#
su -s /bin/bash neutron -c "neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini upgrade head"
[root@dlp ~(keystone)]#
for service in server dhcp-agent l3-agent metadata-agent openvswitch-agent; do
systemctl start neutron-$service
systemctl enable neutron-$service
done
[root@dlp ~(keystone)]#
systemctl restart openstack-nova-api openstack-nova-compute
# show status

[root@dlp ~(keystone)]#
openstack network agent list

+--------------+--------------------+---------------+------------+-------+-------+---------------------------+
| ID           | Agent Type         | Host          | Availab... | Alive | State | Binary                    |
+--------------+--------------------+---------------+------------+-------+-------+---------------------------+
| 5ec215e3-... | L3 agent           | dlp.srv.world | nova       | :-)   | UP    | neutron-l3-agent          |
| 77c0c332-... | DHCP agent         | dlp.srv.world | nova       | :-)   | UP    | neutron-dhcp-agent        |
| db86873d-... | Open vSwitch agent | dlp.srv.world | None       | :-)   | UP    | neutron-openvswitch-agent |
| f42d6161-... | Metadata agent     | dlp.srv.world | None       | :-)   | UP    | neutron-metadata-agent    |
+--------------+--------------------+---------------+------------+-------+-------+---------------------------+
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