Install and configure compute node

The compute node handles connectivity and security groups for instances.

Install the components

# apt install neutron-openvswitch-agent

Configure the common component

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

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 neutron-compute-compute-ubuntu.

compute-install-option1-ubuntu.rst compute-install-option2-ubuntu.rst

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 <configuration/config.html#neutron> for the full set of options including overriding the service catalog endpoint URL if necessary.

Finalize installation

Restart the Compute service:
```
# service nova-compute restart
```

Restart the Linux bridge agent:

# service neutron-openvswitch-agent restart

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