Install and configure controller node¶

This section describes how to install and configure the Compute service, code-named nova, on the controller node.

Prerequisites¶

Before you install and configure the Compute service, you must create a database, service credentials, and API endpoints.

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 nova database:
```
CREATE DATABASE nova;
```
- Grant proper access to the nova database:
```
GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'localhost' \
  IDENTIFIED BY 'NOVA_DBPASS';
GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' \
  IDENTIFIED BY 'NOVA_DBPASS';
```
  Replace NOVA_DBPASS with a suitable password.
- Exit the database access client.
Source the admin credentials to gain access to admin-only CLI commands:
```
$ source admin-openrc.sh
```

To create the service credentials, complete these steps:

Create the nova user:

$ openstack user create --domain default --password-prompt nova
User Password:
Repeat User Password:
+-----------+----------------------------------+
| Field     | Value                            |
+-----------+----------------------------------+
| domain_id | default                          |
| enabled   | True                             |
| id        | 8c46e4760902464b889293a74a0c90a8 |
| name      | nova                             |
+-----------+----------------------------------+

Add the admin role to the nova user:
```
$ openstack role add --project service --user nova admin
```
Note

This command provides no output.

Create the nova service entity:

$ openstack service create --name nova \
  --description "OpenStack Compute" compute
+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | OpenStack Compute                |
| enabled     | True                             |
| id          | 060d59eac51b4594815603d75a00aba2 |
| name        | nova                             |
| type        | compute                          |
+-------------+----------------------------------+

Create the Compute service API endpoints:

$ openstack endpoint create --region RegionOne \
  compute public http://controller:8774/v2/%\(tenant_id\)s
+--------------+-----------------------------------------+
| Field        | Value                                   |
+--------------+-----------------------------------------+
| enabled      | True                                    |
| id           | 3c1caa473bfe4390a11e7177894bcc7b        |
| interface    | public                                  |
| region       | RegionOne                               |
| region_id    | RegionOne                               |
| service_id   | e702f6f497ed42e6a8ae3ba2e5871c78        |
| service_name | nova                                    |
| service_type | compute                                 |
| url          | http://controller:8774/v2/%(tenant_id)s |
+--------------+-----------------------------------------+

$ openstack endpoint create --region RegionOne \
  compute internal http://controller:8774/v2/%\(tenant_id\)s
+--------------+-----------------------------------------+
| Field        | Value                                   |
+--------------+-----------------------------------------+
| enabled      | True                                    |
| id           | e3c918de680746a586eac1f2d9bc10ab        |
| interface    | internal                                |
| region       | RegionOne                               |
| region_id    | RegionOne                               |
| service_id   | e702f6f497ed42e6a8ae3ba2e5871c78        |
| service_name | nova                                    |
| service_type | compute                                 |
| url          | http://controller:8774/v2/%(tenant_id)s |
+--------------+-----------------------------------------+

$ openstack endpoint create --region RegionOne \
  compute admin http://controller:8774/v2/%\(tenant_id\)s
+--------------+-----------------------------------------+
| Field        | Value                                   |
+--------------+-----------------------------------------+
| enabled      | True                                    |
| id           | 38f7af91666a47cfb97b4dc790b94424        |
| interface    | admin                                   |
| region       | RegionOne                               |
| region_id    | RegionOne                               |
| service_id   | e702f6f497ed42e6a8ae3ba2e5871c78        |
| service_name | nova                                    |
| service_type | compute                                 |
| url          | http://controller:8774/v2/%(tenant_id)s |
+--------------+-----------------------------------------+

Install and configure components¶

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.

Install the packages:

# apt-get install nova-api nova-cert nova-conductor \
  nova-consoleauth nova-novncproxy nova-scheduler \
  python-novaclient

Edit the /etc/nova/nova.conf file and complete the following actions:
- In the [database] section, configure database access:
```
[database]
...
connection = mysql+pymysql://nova:NOVA_DBPASS@controller/nova
```
  Replace NOVA_DBPASS with the password you chose for the Compute 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 = nova
password = NOVA_PASS
```
  Replace NOVA_PASS with the password you chose for the nova user in the Identity service.
  
  Note
  
  Comment out or remove any other options in the [keystone_authtoken] section.
- In the [DEFAULT] section, configure the my_ip option to use the management interface IP address of the controller node:
```
[DEFAULT]
...
my_ip = 10.0.0.11
```
- In the [DEFAULT] section, enable support for the Networking service:
```
[DEFAULT]
...
network_api_class = nova.network.neutronv2.api.API
security_group_api = neutron
linuxnet_interface_driver = nova.network.linux_net.NeutronLinuxBridgeInterfaceDriver
firewall_driver = nova.virt.firewall.NoopFirewallDriver
```
  Note
  
  By default, Compute uses an internal firewall service. Since Networking includes a firewall service, you must disable the Compute firewall service by using the nova.virt.firewall.NoopFirewallDriver firewall driver.
- In the [vnc] section, configure the VNC proxy to use the management interface IP address of the controller node:
```
[vnc]
...
vncserver_listen = $my_ip
vncserver_proxyclient_address = $my_ip
```
- In the [glance] section, configure the location of the Image service:
```
[glance]
...
host = controller
```
- In the [oslo_concurrency] section, configure the lock path:
```
[oslo_concurrency]
...
lock_path = /var/lib/nova/tmp
```
- In the [DEFAULT] section, disable the EC2 API:
```
[DEFAULT]
...
enabled_apis=osapi_compute,metadata
```
- (Optional) To assist with troubleshooting, enable verbose logging in the [DEFAULT] section:
```
[DEFAULT]
...
verbose = True
```

Populate the Compute database:

# su -s /bin/sh -c "nova-manage db sync" nova

Finalize installation¶

Restart the Compute services:

# service nova-api restart
# service nova-cert restart
# service nova-consoleauth restart
# service nova-scheduler restart
# service nova-conductor restart
# service nova-novncproxy restart

By default, the Ubuntu packages create an SQLite database.

Because this configuration uses an SQL database server, you can remove the SQLite database file:
```
# rm -f /var/lib/nova/nova.sqlite
```