Install and configure compute node¶

The compute node handles connectivity and security groups for instances.

Install the components¶

# yum install openstack-neutron openstack-neutron-linuxbridge ebtables ipset

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] and [oslo_messaging_rabbit] sections, configure RabbitMQ message queue access:
```
[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:
```
[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 [oslo_concurrency] section, configure the lock path:
```
[oslo_concurrency]
...
lock_path = /var/lib/neutron/tmp
```
- (Optional) To assist with troubleshooting, enable verbose logging in the [DEFAULT] section:
```
[DEFAULT]
...
verbose = True
```

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 Compute to use Networking.

Configure Compute to use Networking¶

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

In the [neutron] section, configure access parameters:

[neutron]
...
url = http://controller:9696
auth_url = http://controller:35357
auth_plugin = password
project_domain_id = default
user_domain_id = 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.

Finalize installation¶

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