Install and configure controller node for Red Hat Enterprise Linux and CentOS¶

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 databases, service credentials, and API endpoints.

To create the databases, 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_api, nova, and nova_cell0 databases:

MariaDB [(none)]> CREATE DATABASE nova_api;
MariaDB [(none)]> CREATE DATABASE nova;
MariaDB [(none)]> CREATE DATABASE nova_cell0;

Grant proper access to the databases:

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

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

MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova_cell0.* TO 'nova'@'localhost' \
  IDENTIFIED BY 'NOVA_DBPASS';
MariaDB [(none)]> GRANT ALL PRIVILEGES ON nova_cell0.* 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:
```
$ . admin-openrc
```

Create the Compute service credentials:

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                  | 8a7dbf5279404537b1c7b86c033620fe |
| name                | nova                             |
| options             | {}                               |
| password_expires_at | None                             |
+---------------------+----------------------------------+

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 API service endpoints:

$ openstack endpoint create --region RegionOne \
  compute public http://controller:8774/v2.1

+--------------+-------------------------------------------+
| Field        | Value                                     |
+--------------+-------------------------------------------+
| enabled      | True                                      |
| id           | 3c1caa473bfe4390a11e7177894bcc7b          |
| interface    | public                                    |
| region       | RegionOne                                 |
| region_id    | RegionOne                                 |
| service_id   | 060d59eac51b4594815603d75a00aba2          |
| service_name | nova                                      |
| service_type | compute                                   |
| url          | http://controller:8774/v2.1               |
+--------------+-------------------------------------------+

$ openstack endpoint create --region RegionOne \
  compute internal http://controller:8774/v2.1

+--------------+-------------------------------------------+
| Field        | Value                                     |
+--------------+-------------------------------------------+
| enabled      | True                                      |
| id           | e3c918de680746a586eac1f2d9bc10ab          |
| interface    | internal                                  |
| region       | RegionOne                                 |
| region_id    | RegionOne                                 |
| service_id   | 060d59eac51b4594815603d75a00aba2          |
| service_name | nova                                      |
| service_type | compute                                   |
| url          | http://controller:8774/v2.1               |
+--------------+-------------------------------------------+

$ openstack endpoint create --region RegionOne \
  compute admin http://controller:8774/v2.1

+--------------+-------------------------------------------+
| Field        | Value                                     |
+--------------+-------------------------------------------+
| enabled      | True                                      |
| id           | 38f7af91666a47cfb97b4dc790b94424          |
| interface    | admin                                     |
| region       | RegionOne                                 |
| region_id    | RegionOne                                 |
| service_id   | 060d59eac51b4594815603d75a00aba2          |
| service_name | nova                                      |
| service_type | compute                                   |
| url          | http://controller:8774/v2.1               |
+--------------+-------------------------------------------+

Install Placement service and configure user and endpoints:
- Refer to the Placement service install guide for more information.

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:

# yum install openstack-nova-api openstack-nova-conductor \
  openstack-nova-novncproxy openstack-nova-scheduler

Edit the /etc/nova/nova.conf file and complete the following actions:
- In the [DEFAULT] section, enable only the compute and metadata APIs:
```
[DEFAULT]
# ...
enabled_apis = osapi_compute,metadata
```
- In the [api_database] and [database] sections, configure database access:
```
[api_database]
# ...
connection = mysql+pymysql://nova:NOVA_DBPASS@controller/nova_api

[database]
# ...
connection = mysql+pymysql://nova:NOVA_DBPASS@controller/nova
```
  Replace NOVA_DBPASS with the password you chose for the Compute databases.
- In the [DEFAULT] section, configure RabbitMQ message queue access:
```
[DEFAULT]
# ...
transport_url = rabbit://openstack:RABBIT_PASS@controller:5672/
```
  Replace RABBIT_PASS with the password you chose for the openstack account in RabbitMQ.
- In the [api] and [keystone_authtoken] sections, configure Identity service access:
```
[api]
# ...
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 = 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 [service_user] section, configure service user tokens:
```
[service_user]
send_service_user_token = true
auth_url = https://controller/identity
auth_strategy = keystone
auth_type = password
project_domain_name = Default
project_name = service
user_domain_name = Default
username = nova
password = NOVA_PASS
```
  Replace NOVA_PASS with the password you chose for the nova user in the Identity service.
- 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
```
- Configure the [neutron] section of /etc/nova/nova.conf. Refer to the Networking service install guide for more details.
- In the [vnc] section, configure the VNC proxy to use the management interface IP address of the controller node:
```
[vnc]
enabled = true
# ...
server_listen = $my_ip
server_proxyclient_address = $my_ip
```
- In the [glance] section, configure the location of the Image service API:
```
[glance]
# ...
api_servers = http://controller:9292
```
- In the [oslo_concurrency] section, configure the lock path:
```
[oslo_concurrency]
# ...
lock_path = /var/lib/nova/tmp
```
- In the [placement] section, configure access to the Placement service:
```
[placement]
# ...
region_name = RegionOne
project_domain_name = Default
project_name = service
auth_type = password
user_domain_name = Default
auth_url = http://controller:5000/v3
username = placement
password = PLACEMENT_PASS
```
  Replace PLACEMENT_PASS with the password you choose for the placement service user created when installing Placement. Comment out or remove any other options in the [placement] section.
Populate the nova-api database:
```
# su -s /bin/sh -c "nova-manage api_db sync" nova
```
Note

Ignore any deprecation messages in this output.

# su -s /bin/sh -c "nova-manage cell_v2 map_cell0" nova

Create the cell1 cell:

# su -s /bin/sh -c "nova-manage cell_v2 create_cell --name=cell1 --verbose" nova

Populate the nova database:

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

Verify nova cell0 and cell1 are registered correctly:

# su -s /bin/sh -c "nova-manage cell_v2 list_cells" nova
+-------+--------------------------------------+----------------------------------------------------+--------------------------------------------------------------+----------+
|  Name |                 UUID                 |                   Transport URL                    |                     Database Connection                      | Disabled |
+-------+--------------------------------------+----------------------------------------------------+--------------------------------------------------------------+----------+
| cell0 | 00000000-0000-0000-0000-000000000000 |                       none:/                       | mysql+pymysql://nova:****@controller/nova_cell0?charset=utf8 |  False   |
| cell1 | f690f4fd-2bc5-4f15-8145-db561a7b9d3d | rabbit://openstack:****@controller:5672/nova_cell1 | mysql+pymysql://nova:****@controller/nova_cell1?charset=utf8 |  False   |
+-------+--------------------------------------+----------------------------------------------------+--------------------------------------------------------------+----------+

Finalize installation¶

Start the Compute services and configure them to start when the system boots:

# systemctl enable \
    openstack-nova-api.service \
    openstack-nova-scheduler.service \
    openstack-nova-conductor.service \
    openstack-nova-novncproxy.service
# systemctl start \
    openstack-nova-api.service \
    openstack-nova-scheduler.service \
    openstack-nova-conductor.service \
    openstack-nova-novncproxy.service

Install and configure controller node for Red Hat Enterprise Linux and CentOS

Install and configure controller node for Red Hat Enterprise Linux and CentOS¶

Prerequisites¶

Install and configure components¶

Finalize installation¶

nova 23.2.3.dev51

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