Install and configure compute node¶

The compute node handles connectivity and security groups for instances.

Install the components¶

# zypper install --no-recommends \
  openstack-neutron-linuxbridge-agent bridge-utils

Configure the common component¶

The Networking common component configuration includes the authentication mechanism, message queue, and plug-in.

Note

Default configuration files vary by distribution. You might need to add these sections and options rather than modifying existing sections and options. Also, an ellipsis (...) in the configuration snippets indicates potential default configuration options that you should retain.

Edit the /etc/neutron/neutron.conf file and complete the following actions:
- In the [database] section, comment out any connection options because compute nodes do not directly access the database.
- In the [DEFAULT] section, configure RabbitMQ message queue access:
```
[DEFAULT]
# ...
transport_url = rabbit://openstack:RABBIT_PASS@controller
```
  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:
```
[DEFAULT]
# ...
auth_strategy = keystone

[keystone_authtoken]
# ...
www_authenticate_uri = http://controller:5000
auth_url = http://controller:5000
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = 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 [oslo_concurrency] section, configure the lock path:

[oslo_concurrency]
# ...
lock_path = /var/lib/neutron/tmp

Configure networking options¶

Choose the same networking option that you chose for the controller node to configure services specific to it. Afterwards, return here and proceed to Configure the Compute service to use the Networking service.

Configure the Compute service to use the Networking service¶

Edit the /etc/nova/nova.conf file and complete the following actions:
- In the [neutron] section, configure access parameters:
```
[neutron]
# ...
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
```
  Replace NEUTRON_PASS with the password you chose for the neutron user in the Identity service.
  
  See the compute service configuration guide for the full set of options including overriding the service catalog endpoint URL if necessary.

Finalize installation¶

The Networking service initialization scripts expect the variable NEUTRON_PLUGIN_CONF in the /etc/sysconfig/neutron file to reference the ML2 plug-in configuration file. Ensure that the /etc/sysconfig/neutron file contains the following:
```
NEUTRON_PLUGIN_CONF="/etc/neutron/plugins/ml2/ml2_conf.ini"
```

Restart the Compute service:

# systemctl restart openstack-nova-compute.service

Start the Linux Bridge agent and configure it to start when the system boots:

# systemctl enable openstack-neutron-linuxbridge-agent.service
# systemctl start openstack-neutron-linuxbridge-agent.service