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

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.

  1. 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.

  2. Source the admin credentials to gain access to admin-only CLI commands:

    $ . admin-openrc
    
  3. 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                          |
      +-------------+----------------------------------+
      
  4. 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 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.

  1. Install the packages:

    # yum install openstack-nova-api openstack-nova-conductor \
      openstack-nova-novncproxy openstack-nova-scheduler
    
  2. 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
      

      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]
      # ...
      auth_url = http://controller:5000/v3
      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 [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]
      # ...
      use_neutron = true
      firewall_driver = nova.virt.firewall.NoopFirewallDriver
      

      Note

      By default, Compute uses an internal firewall driver. Since the Networking service includes a firewall driver, you must disable the Compute firewall driver by using the nova.virt.firewall.NoopFirewallDriver firewall driver.

    • 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.

  3. Populate the nova-api database:

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

    Note

    Ignore any deprecation messages in this output.

  4. Register the cell0 database:

    # su -s /bin/sh -c "nova-manage cell_v2 map_cell0" nova
    
  5. Create the cell1 cell:

    # su -s /bin/sh -c "nova-manage cell_v2 create_cell --name=cell1 --verbose" nova
    109e1d4b-536a-40d0-83c6-5f121b82b650
    
  6. Populate the nova database:

    # su -s /bin/sh -c "nova-manage db sync" nova
    
  7. Verify nova cell0 and cell1 are registered correctly:

    # su -s /bin/sh -c "nova-manage cell_v2 list_cells" nova
    +-------+--------------------------------------+
    | Name  | UUID                                 |
    +-------+--------------------------------------+
    | cell1 | 109e1d4b-536a-40d0-83c6-5f121b82b650 |
    | cell0 | 00000000-0000-0000-0000-000000000000 |
    +-------+--------------------------------------+
    

Finalize installation

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

    Note

    nova-consoleauth is deprecated since 18.0.0 (Rocky) and will be removed in an upcoming release. Console proxies should be deployed per cell. If performing a fresh install (not an upgrade), then you likely do not need to install the nova-consoleauth service. See workarounds.enable_consoleauth for details.

    # systemctl enable openstack-nova-api.service \
      openstack-nova-consoleauth openstack-nova-scheduler.service \
      openstack-nova-conductor.service openstack-nova-novncproxy.service
    # systemctl start openstack-nova-api.service \
      openstack-nova-consoleauth openstack-nova-scheduler.service \
      openstack-nova-conductor.service openstack-nova-novncproxy.service
    
Creative Commons Attribution 3.0 License

Except where otherwise noted, this document is licensed under Creative Commons Attribution 3.0 License. See all OpenStack Legal Documents.