Configure controller node

Prerequisites

Before you configure OpenStack Networking (neutron), you must create a database and Identity service credentials including a user and service.

Connect to the database as the root user, create the neutron database, and grant the proper access to it:

Replace NEUTRON_DBPASS with a suitable password.

$ mysql -u root -p
mysql> CREATE DATABASE neutron;
mysql> GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'localhost' \
IDENTIFIED BY 'NEUTRON_DBPASS';
mysql> GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'%' \
IDENTIFIED BY 'NEUTRON_DBPASS';

Create Identity service credentials for Networking:

Create the neutron user:
Replace NEUTRON_PASS with a suitable password and [email protected] with a suitable e-mail address.
```
$ keystone user-create --name neutron --pass NEUTRON_PASS --email [email protected]
```

Link the neutron user to the service tenant and admin role:

$ keystone user-role-add --user neutron --tenant service --role admin

Create the neutron service:

$ keystone service-create --name neutron --type network --description "OpenStack Networking"

Create the service endpoint:

$ keystone endpoint-create \
  --service-id $(keystone service-list | awk '/ network / {print $2}') \
  --publicurl http://controller:9696 \
  --adminurl http://controller:9696 \
  --internalurl http://controller:9696

To install the Networking components

# yum install openstack-neutron openstack-neutron-ml2 python-neutronclient

To configure the Networking server component

The Networking server component configuration includes the database, authentication mechanism, message broker, topology change notifier, and plug-in.

Configure Networking to use the database:

Replace NEUTRON_DBPASS with a suitable password.

# openstack-config --set /etc/neutron/neutron.conf database connection \
  mysql://neutron:NEUTRON_DBPASS@controller/neutron

Configure Networking to use the Identity service for authentication:

Replace NEUTRON_PASS with the password you chose for the neutron user in the Identity service.

# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  auth_strategy keystone
# openstack-config --set /etc/neutron/neutron.conf keystone_authtoken \
  auth_uri http://controller:5000
# openstack-config --set /etc/neutron/neutron.conf keystone_authtoken \
  auth_host controller
# openstack-config --set /etc/neutron/neutron.conf keystone_authtoken \
  auth_protocol http
# openstack-config --set /etc/neutron/neutron.conf keystone_authtoken \
  auth_port 35357
# openstack-config --set /etc/neutron/neutron.conf keystone_authtoken \
  admin_tenant_name service
# openstack-config --set /etc/neutron/neutron.conf keystone_authtoken \
  admin_user neutron
# openstack-config --set /etc/neutron/neutron.conf keystone_authtoken \
  admin_password NEUTRON_PASS

Configure Networking to use the message broker:

# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  rpc_backend neutron.openstack.common.rpc.impl_qpid
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  qpid_hostname controller

Configure Networking to notify Compute about network topology changes:

# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  notify_nova_on_port_status_changes True
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  notify_nova_on_port_data_changes True
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  nova_url http://controller:8774/v2
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  nova_admin_username nova
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  nova_admin_tenant_id $(keystone tenant-list | awk '/ service / { print $2 }')
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  nova_admin_password NOVA_PASS
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  nova_admin_auth_url http://controller:35357/v2.0

Configure Networking to use the Modular Layer 2 (ML2) plug-in and associated services:
```
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  core_plugin ml2
# openstack-config --set /etc/neutron/neutron.conf DEFAULT \
  service_plugins router
```
Note
We recommend adding verbose = True to the [DEFAULT] section in /etc/neutron/neutron.conf to assist with troubleshooting.
Comment out any lines in the [service_providers] section.

To configure the Modular Layer 2 (ML2) plug-in

The ML2 plug-in uses the Open vSwitch (OVS) mechanism (agent) to build the virtual networking framework for instances. However, the controller node does not need the OVS agent or service because it does not handle instance network traffic.

Run the following commands:

# openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 \
  type_drivers gre
# openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 \
  tenant_network_types gre
# openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2 \
  mechanism_drivers openvswitch
# openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ml2_type_gre \
  tunnel_id_ranges 1:1000
# openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini securitygroup \
  firewall_driver neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
# openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini securitygroup \
  enable_security_group True

To configure Compute to use Networking

By default, most distributions configure Compute to use legacy networking. You must reconfigure Compute to manage networks through Networking.

Run the following commands:

Replace NEUTRON_PASS with the password you chose for the neutron user in the Identity service.

# openstack-config --set /etc/nova/nova.conf DEFAULT \
  network_api_class nova.network.neutronv2.api.API
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  neutron_url http://controller:9696
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  neutron_auth_strategy keystone
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  neutron_admin_tenant_name service
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  neutron_admin_username neutron
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  neutron_admin_password NEUTRON_PASS
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  neutron_admin_auth_url http://controller:35357/v2.0
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  linuxnet_interface_driver nova.network.linux_net.LinuxOVSInterfaceDriver
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  firewall_driver nova.virt.firewall.NoopFirewallDriver
# openstack-config --set /etc/nova/nova.conf DEFAULT \
  security_group_api neutron

	Note
	By default, Compute uses an internal firewall service. Since Networking includes a firewall service, you must disable the Compute firewall service by using the `nova.virt.firewall.NoopFirewallDriver` firewall driver.

To finalize installation

The Networking service initialization scripts expect a symbolic link /etc/neutron/plugin.ini pointing to the configuration file associated with your chosen plug-in. Using ML2, for example, the symbolic link must point to /etc/neutron/plugins/ml2/ml2_conf.ini. If this symbolic link does not exist, create it using the following commands:
```
# ln -s plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini
```

Restart the Compute services:

# service openstack-nova-api restart
# service openstack-nova-scheduler restart
# service openstack-nova-conductor restart

Start the Networking service and configure it to start when the system boots:
```
# service neutron-server start
# chkconfig neutron-server on
```

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Legal notices

	Note
	We recommend adding `verbose = True` to the `[DEFAULT]` section in `/etc/neutron/neutron.conf` to assist with troubleshooting.