Networking Option 1: Provider networks ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Install and configure the Networking components on the *controller* node. Prerequisites ------------- Before you configure networking option 1, you must configure kernel parameters to disable reverse-path filtering. #. Edit the ``/etc/sysctl.conf`` file to contain the following parameters: .. code-block:: ini net.ipv4.conf.all.rp_filter=0 net.ipv4.conf.default.rp_filter=0 #. Implement the changes: .. code-block:: console # sysctl -p Install the components ---------------------- .. only:: ubuntu .. code-block:: console # apt-get install neutron-server neutron-plugin-ml2 \ neutron-plugin-linuxbridge-agent neutron-dhcp-agent \ neutron-metadata-agent python-neutronclient .. only:: rdo .. code-block:: console # yum install openstack-neutron openstack-neutron-ml2 \ openstack-neutron-linuxbridge python-neutronclient .. only:: obs .. code-block:: console # zypper install --no-recommends openstack-neutron \ openstack-neutron-server openstack-neutron-linuxbridge-agent \ openstack-neutron-dhcp-agent openstack-neutron-metadata-agent \ ipset .. only:: debian Install and configure the networking components ----------------------------------------------- #. .. code-block:: console # apt-get install neutron-server neutron-plugin-linuxbridge-agent \ neutron-dhcp-agent neutron-metadata-agent For networking option 2, also install the ``neutron-l3-agent`` package. #. Respond to prompts for `database management <#debconf-dbconfig-common>`__, `Identity service credentials <#debconf-keystone_authtoken>`__, `service endpoint registration <#debconf-api-endpoints>`__, and `message queue credentials <#debconf-rabbitmq>`__. #. Select the ML2 plug-in: .. image:: figures/debconf-screenshots/neutron_1_plugin_selection.png .. note:: Selecting the ML2 plug-in also populates the ``service_plugins`` and ``allow_overlapping_ips`` options in the ``/etc/neutron/neutron.conf`` file with the appropriate values. .. only:: ubuntu or rdo or obs Configure the server component ------------------------------ The Networking server component configuration includes the database, authentication mechanism, message queue, topology change notifications, and plug-in. .. include:: shared/note_configuration_vary_by_distribution.rst #. Edit the ``/etc/neutron/neutron.conf`` file and complete the following actions: * In the ``[database]`` section, configure database access: .. code-block:: ini [database] ... connection = mysql+pymysql://neutron:NEUTRON_DBPASS@controller/neutron Replace ``NEUTRON_DBPASS`` with the password you chose for the database. * In the ``[DEFAULT]`` section, enable the Modular Layer 2 (ML2) plug-in and disable additional plug-ins: .. code-block:: ini [DEFAULT] ... core_plugin = ml2 service_plugins = * In the ``[DEFAULT]`` and ``[oslo_messaging_rabbit]`` sections, configure RabbitMQ message queue access: .. code-block:: ini [DEFAULT] ... rpc_backend = rabbit [oslo_messaging_rabbit] ... rabbit_host = controller rabbit_userid = openstack rabbit_password = RABBIT_PASS Replace ``RABBIT_PASS`` with the password you chose for the ``openstack`` account in RabbitMQ. * In the ``[DEFAULT]`` and ``[keystone_authtoken]`` sections, configure Identity service access: .. code-block:: ini [DEFAULT] ... auth_strategy = keystone [keystone_authtoken] ... auth_uri = http://controller:5000 auth_url = http://controller:35357 auth_plugin = password project_domain_id = default user_domain_id = default project_name = service username = neutron password = NEUTRON_PASS Replace ``NEUTRON_PASS`` with the password you chose for the ``neutron`` user in the Identity service. .. note:: Comment out or remove any other options in the ``[keystone_authtoken]`` section. * In the ``[DEFAULT]`` and ``[nova]`` sections, configure Networking to notify Compute of network topology changes: .. code-block:: ini [DEFAULT] ... notify_nova_on_port_status_changes = True notify_nova_on_port_data_changes = True nova_url = http://controller:8774/v2 [nova] ... auth_url = http://controller:35357 auth_plugin = password project_domain_id = default user_domain_id = default region_name = RegionOne project_name = service username = nova password = NOVA_PASS Replace ``NOVA_PASS`` with the password you chose for the ``nova`` user in the Identity service. * (Optional) To assist with troubleshooting, enable verbose logging in the ``[DEFAULT]`` section: .. code-block:: ini [DEFAULT] ... verbose = True Configure the Modular Layer 2 (ML2) plug-in ------------------------------------------- The ML2 plug-in uses the Linux bridge mechanism to build layer-2 (bridging and switching) virtual networking infrastructure for instances. #. Edit the ``/etc/neutron/plugins/ml2/ml2_conf.ini`` file and complete the following actions: * In the ``[ml2]`` section, enable flat and VLAN networks: .. code-block:: ini [ml2] ... type_drivers = flat,vlan * In the ``[ml2]`` section, disable project (private) networks: .. code-block:: ini [ml2] ... tenant_network_types = * In the ``[ml2]`` section, enable the Linux bridge mechanism: .. code-block:: ini [ml2] ... mechanism_drivers = linuxbridge .. warning:: After you configure the ML2 plug-in, removing values in the ``type_drivers`` option can lead to database inconsistency. * In the ``[ml2]`` section, enable the port security extension driver: .. code-block:: ini [ml2] ... extension_drivers = port_security * In the ``[ml2_type_flat]`` section, configure the public flat provider network: .. code-block:: ini [ml2_type_flat] ... flat_networks = public Configure the Linux bridge agent -------------------------------- The Linux bridge agent builds layer-2 (bridging and switching) virtual networking infrastructure for instances including VXLAN tunnels for private networks and handles security groups. #. Edit the ``/etc/neutron/plugins/ml2/linuxbridge_agent.conf`` file and complete the following actions: * In the ``[linux_bridge]`` section, map the public virtual network to the public physical network interface: .. code-block:: ini [linux_bridge] physical_interface_mappings = public:PUBLIC_INTERFACE_NAME Replace ``PUBLIC_INTERFACE_NAME`` with the name of the underlying physical public network interface. * In the ``[vxlan]`` section, disable VXLAN overlay networks: .. code-block:: ini [vxlan] enable_vxlan = False * In the ``[agent]`` section, enable ARP spoofing protection: .. code-block:: ini [agent] ... prevent_arp_spoofing = True * In the ``[securitygroup]`` section, enable security groups, enable :term:`ipset`, and configure the Linux bridge :term:`iptables` firewall driver: .. code-block:: ini [securitygroup] ... enable_security_group = True enable_ipset = True firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver Configure the DHCP agent ------------------------ The :term:`DHCP agent` provides DHCP services for virtual networks. #. Edit the ``/etc/neutron/dhcp_agent.ini`` file and complete the following actions: * In the ``[DEFAULT]`` section, configure the Linux bridge interface driver, Dnsmasq DHCP driver, and enable isolated metadata so instances on public networks can access metadata over the network: .. code-block:: ini [DEFAULT] ... interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq enable_isolated_metadata = True * (Optional) To assist with troubleshooting, enable verbose logging in the ``[DEFAULT]`` section: .. code-block:: ini [DEFAULT] ... verbose = True Return to :ref:`Networking controller node configuration `.