Install and configure for Red Hat Enterprise Linux and CentOS

Install and configure for Red Hat Enterprise Linux and CentOS

This section describes how to install and configure the Infrastructure Optimization service for Red Hat Enterprise Linux 7 and CentOS 7.

Prerequisites

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

  1. 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 watcher database:

      CREATE DATABASE watcher CHARACTER SET utf8;
      
    • Grant proper access to the watcher database:

      GRANT ALL PRIVILEGES ON watcher.* TO 'watcher'@'localhost' \
        IDENTIFIED BY 'WATCHER_DBPASS';
      GRANT ALL PRIVILEGES ON watcher.* TO 'watcher'@'%' \
        IDENTIFIED BY 'WATCHER_DBPASS';
      

      Replace WATCHER_DBPASS with a suitable password.

    • Exit the database access client.

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

    $ . admin-openrc
    
  3. To create the service credentials, complete these steps:

    • Create the watcher user:

      $ openstack user create --domain default --password-prompt watcher
        User Password:
        Repeat User Password:
        +---------------------+----------------------------------+
        | Field               | Value                            |
        +---------------------+----------------------------------+
        | domain_id           | default                          |
        | enabled             | True                             |
        | id                  | b18ee38e06034b748141beda8fc8bfad |
        | name                | watcher                          |
        | options             | {}                               |
        | password_expires_at | None                             |
        +---------------------+----------------------------------+
      
    • Add the admin role to the watcher user:

      $ openstack role add --project service --user watcher admin
      

      Note

      This command produces no output.

    • Create the watcher service entities:

      $ openstack service create --name watcher --description "Infrastructure Optimization" infra-optim
        +-------------+----------------------------------+
        | Field       | Value                            |
        +-------------+----------------------------------+
        | description | Infrastructure Optimization      |
        | enabled     | True                             |
        | id          | d854f6fff0a64f77bda8003c8dedfada |
        | name        | watcher                          |
        | type        | infra-optim                      |
        +-------------+----------------------------------+
      
  4. Create the Infrastructure Optimization service API endpoints:

    $ openstack endpoint create --region RegionOne \
      infra-optim public http://controller:9322
      +-------------+----------------------------------+
      | Field       | Value                            |
      +-------------+----------------------------------+
      | description | Infrastructure Optimization      |
      | enabled     | True                             |
      | id          | d854f6fff0a64f77bda8003c8dedfada |
      | name        | watcher                          |
      | type        | infra-optim                      |
      +-------------+----------------------------------+
    
    $ openstack endpoint create --region RegionOne \
      infra-optim internal http://controller:9322
      +--------------+----------------------------------+
      | Field        | Value                            |
      +--------------+----------------------------------+
      | enabled      | True                             |
      | id           | 225aef8465ef4df48a341aaaf2b0a390 |
      | interface    | internal                         |
      | region       | RegionOne                        |
      | region_id    | RegionOne                        |
      | service_id   | d854f6fff0a64f77bda8003c8dedfada |
      | service_name | watcher                          |
      | service_type | infra-optim                      |
      | url          | http://controller:9322           |
      +--------------+----------------------------------+
    
    $ openstack endpoint create --region RegionOne \
      infra-optim admin http://controller:9322
      +--------------+----------------------------------+
      | Field        | Value                            |
      +--------------+----------------------------------+
      | enabled      | True                             |
      | id           | 375eb5057fb546edbdf3ee4866179672 |
      | interface    | admin                            |
      | region       | RegionOne                        |
      | region_id    | RegionOne                        |
      | service_id   | d854f6fff0a64f77bda8003c8dedfada |
      | service_name | watcher                          |
      | service_type | infra-optim                      |
      | url          | http://controller:9322           |
      +--------------+----------------------------------+
    

Install and configure components

  1. Install the packages:

    # sudo yum install openstack-watcher-api openstack-watcher-applier \
      openstack-watcher-decision-engine
    
  1. Edit the /etc/watcher/watcher.conf file and complete the following actions:

    • In the [database] section, configure database access:

      [database]
      ...
      connection = mysql+pymysql://watcher:WATCHER_DBPASS@controller/watcher?charset=utf8
      
    • In the [DEFAULT] section, configure the transport url for RabbitMQ message broker.

      [DEFAULT]
      ...
      control_exchange = watcher
      transport_url = rabbit://openstack:RABBIT_PASS@controller
      

      Replace the RABBIT_PASS with the password you chose for OpenStack user in RabbitMQ.

    • In the [keystone_authtoken] section, configure Identity service access.

      [keystone_authtoken]
      ...
      auth_uri = http://controller:5000
      auth_url = http://controller:35357
      memcached_servers = controller:11211
      auth_type = password
      project_domain_name = default
      user_domain_name = default
      project_name = service
      username = watcher
      password = WATCHER_PASS
      

      Replace WATCHER_PASS with the password you chose for the watcher user in the Identity service.

    • Watcher interacts with other OpenStack projects via project clients, in order to instantiate these clients, Watcher requests new session from Identity service. In the [watcher_client_auth] section, configure the identity service access to interact with other OpenStack project clients.

      [watcher_client_auth]
      ...
      auth_type = password
      auth_url = http://controller:35357
      username = watcher
      password = WATCHER_PASS
      project_domain_name = default
      user_domain_name = default
      project_name = service
      

      Replace WATCHER_PASS with the password you chose for the watcher user in the Identity service.

    • In the [oslo_messaging_notifications] section, configure the messaging driver.

      [oslo_messaging_notifications]
      ...
      driver = messagingv2
      
  2. Populate watcher database:

    su -s /bin/sh -c "watcher-db-manage" watcher
    

Finalize installation

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

# systemctl enable openstack-watcher-api.service \
  openstack-watcher-decision-engine.service \
  openstack-watcher-applier.service

# systemctl start openstack-watcher-api.service \
  openstack-watcher-decision-engine.service \
  openstack-watcher-applier.service
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