Install and configure controller node¶

Prerequisites¶

Before you configure the OpenStack Networking (neutron) service, you must create a database, service credentials, and API endpoints.

1. To create the database, complete these steps:

   • Use the database access client to connect to the database server as the root user:

     $ mysql -u root -p
     

   • Create the neutron database:

     MariaDB [(none)] CREATE DATABASE neutron;
     

   • Grant proper access to the neutron database, replacing NEUTRON_DBPASS with a suitable password:

     MariaDB [(none)]> GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'localhost' \
       IDENTIFIED BY 'NEUTRON_DBPASS';
     MariaDB [(none)]> GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'%' \
       IDENTIFIED BY 'NEUTRON_DBPASS';
     

   • Exit the database access client.

2. Source the admin credentials to gain access to admin-only CLI commands:

   $ . admin-openrc
   

3. To create the service credentials, complete these steps:

   • Create the neutron user:

     $ openstack user create --domain default --password-prompt neutron
     
     User Password:
     Repeat User Password:
     +---------------------+----------------------------------+
     | Field               | Value                            |
     +---------------------+----------------------------------+
     | domain_id           | default                          |
     | enabled             | True                             |
     | id                  | fdb0f541e28141719b6a43c8944bf1fb |
     | name                | neutron                          |
     | options             | {}                               |
     | password_expires_at | None                             |
     +---------------------+----------------------------------+
     

   • Add the admin role to the neutron user:

     $ openstack role add --project service --user neutron admin
     

     Note

     This command provides no output.

   • Create the neutron service entity:

     $ openstack service create --name neutron \
       --description "OpenStack Networking" network
     
     +-------------+----------------------------------+
     | Field       | Value                            |
     +-------------+----------------------------------+
     | description | OpenStack Networking             |
     | enabled     | True                             |
     | id          | f71529314dab4a4d8eca427e701d209e |
     | name        | neutron                          |
     | type        | network                          |
     +-------------+----------------------------------+
     

4. Create the Networking service API endpoints:

   $ openstack endpoint create --region RegionOne \
     network public http://controller:9696
   
   +--------------+----------------------------------+
   | Field        | Value                            |
   +--------------+----------------------------------+
   | enabled      | True                             |
   | id           | 85d80a6d02fc4b7683f611d7fc1493a3 |
   | interface    | public                           |
   | region       | RegionOne                        |
   | region_id    | RegionOne                        |
   | service_id   | f71529314dab4a4d8eca427e701d209e |
   | service_name | neutron                          |
   | service_type | network                          |
   | url          | http://controller:9696           |
   +--------------+----------------------------------+
   
   $ openstack endpoint create --region RegionOne \
     network internal http://controller:9696
   
   +--------------+----------------------------------+
   | Field        | Value                            |
   +--------------+----------------------------------+
   | enabled      | True                             |
   | id           | 09753b537ac74422a68d2d791cf3714f |
   | interface    | internal                         |
   | region       | RegionOne                        |
   | region_id    | RegionOne                        |
   | service_id   | f71529314dab4a4d8eca427e701d209e |
   | service_name | neutron                          |
   | service_type | network                          |
   | url          | http://controller:9696           |
   +--------------+----------------------------------+
   
   $ openstack endpoint create --region RegionOne \
     network admin http://controller:9696
   
   +--------------+----------------------------------+
   | Field        | Value                            |
   +--------------+----------------------------------+
   | enabled      | True                             |
   | id           | 1ee14289c9374dffb5db92a5c112fc4e |
   | interface    | admin                            |
   | region       | RegionOne                        |
   | region_id    | RegionOne                        |
   | service_id   | f71529314dab4a4d8eca427e701d209e |
   | service_name | neutron                          |
   | service_type | network                          |
   | url          | http://controller:9696           |
   +--------------+----------------------------------+
   

Configure networking options¶

You can deploy the Networking service using one of two architectures represented by options 1 and 2.

Option 1 deploys the simplest possible architecture that only supports attaching instances to provider (external) networks. No self-service (private) networks, routers, or floating IP addresses. Only the admin or other privileged user can manage provider networks.

Option 2 augments option 1 with layer-3 services that support attaching instances to self-service networks. The demo or other unprivileged user can manage self-service networks including routers that provide connectivity between self-service and provider networks. Additionally, floating IP addresses provide connectivity to instances using self-service networks from external networks such as the Internet.

Self-service networks typically use overlay networks. Overlay network protocols such as VXLAN include additional headers that increase overhead and decrease space available for the payload or user data. Without knowledge of the virtual network infrastructure, instances attempt to send packets using the default Ethernet maximum transmission unit (MTU) of 1500 bytes. The Networking service automatically provides the correct MTU value to instances via DHCP. However, some cloud images do not use DHCP or ignore the DHCP MTU option and require configuration using metadata or a script.

Choose one of the following networking options to configure services specific to it. Afterwards, return here and proceed to Configure the metadata agent.

Configure the metadata agent¶

The metadata agent provides configuration information such as credentials to instances.

• Edit the /etc/neutron/metadata_agent.ini file and complete the following actions:

  • In the [DEFAULT] section, configure the metadata host and shared secret:

    [DEFAULT]
    # ...
    nova_metadata_host = controller
    metadata_proxy_shared_secret = METADATA_SECRET
    

    Replace METADATA_SECRET with a suitable secret for the metadata proxy.

Configure the Compute service to use the Networking service¶

• Edit the /etc/nova/nova.conf file and perform the following actions:

  • In the [neutron] section, configure access parameters, enable the metadata proxy, and configure the secret:

    [neutron]
    # ...
    url = http://controller:9696
    auth_url = http://controller:5000
    auth_type = password
    project_domain_name = default
    user_domain_name = default
    region_name = RegionOne
    project_name = service
    username = neutron
    password = NEUTRON_PASS
    service_metadata_proxy = true
    metadata_proxy_shared_secret = METADATA_SECRET
    

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

    Replace METADATA_SECRET with the secret you chose for the metadata proxy.

Finalize installation¶

1. The Networking service initialization scripts expect a symbolic link /etc/neutron/plugin.ini pointing to the ML2 plug-in configuration file, /etc/neutron/plugins/ml2/ml2_conf.ini. If this symbolic link does not exist, create it using the following command:

   # ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini
   

2. Populate the database:

   # su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf \
     --config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade head" neutron
   

   Note

   Database population occurs later for Networking because the script requires complete server and plug-in configuration files.

3. Restart the Compute API service:

   # systemctl restart openstack-nova-api.service
   

4. Start the Networking services and configure them to start when the system boots.

   For both networking options:

   # systemctl enable neutron-server.service \
     neutron-linuxbridge-agent.service neutron-dhcp-agent.service \
     neutron-metadata-agent.service
   # systemctl start neutron-server.service \
     neutron-linuxbridge-agent.service neutron-dhcp-agent.service \
     neutron-metadata-agent.service
   

   For networking option 2, also enable and start the layer-3 service:

   # systemctl enable neutron-l3-agent.service
   # systemctl start neutron-l3-agent.service