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 Telemetry service, code-named ceilometer, on the controller node.

Prerequisites

Warning

Ceilometer’s native storage has extremely large resource requirements. For more efficient time-series storage, a time-series database such as Gnocchi is recommended. The following instructions are unsupported in future releases.

Before you install and configure the Telemetry service, you must create a database, service credentials, and API endpoints. However, unlike other services, the Telemetry service uses a NoSQL database. See NoSQL database for Red Hat Enterprise Linux and CentOS to install and configure MongoDB before proceeding further.

  1. Create the ceilometer database:

    # mongo --host controller --eval '
      db = db.getSiblingDB("ceilometer");
      db.createUser({user: "ceilometer",
      pwd: "CEILOMETER_DBPASS",
      roles: [ "readWrite", "dbAdmin" ]})'
    
      MongoDB shell version: 2.6.x
      connecting to: controller:27017/test
      Successfully added user: { "user" : "ceilometer", "roles" : [ "readWrite", "dbAdmin" ] }
    

    Replace CEILOMETER_DBPASS with a suitable password.

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

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

    • Create the ceilometer user:

      $ openstack user create --domain default --password-prompt ceilometer
      User Password:
      Repeat User Password:
      +-----------+----------------------------------+
      | Field     | Value                            |
      +-----------+----------------------------------+
      | domain_id | e0353a670a9e496da891347c589539e9 |
      | enabled   | True                             |
      | id        | c859c96f57bd4989a8ea1a0b1d8ff7cd |
      | name      | ceilometer                       |
      +-----------+----------------------------------+
      
    • Add the admin role to the ceilometer user.

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

      Note

      This command provides no output.

    • Create the ceilometer service entity:

      $ openstack service create --name ceilometer \
        --description "Telemetry" metering
      +-------------+----------------------------------+
      | Field       | Value                            |
      +-------------+----------------------------------+
      | description | Telemetry                        |
      | enabled     | True                             |
      | id          | 5fb7fd1bb2954fddb378d4031c28c0e4 |
      | name        | ceilometer                       |
      | type        | metering                         |
      +-------------+----------------------------------+
      
  3. Create the Telemetry service API endpoints:

    $ openstack endpoint create --region RegionOne \
      metering public http://controller:8777
    +--------------+----------------------------------+
    | Field        | Value                            |
    +--------------+----------------------------------+
    | enabled      | True                             |
    | id           | b808b67b848d443e9eaaa5e5d796970c |
    | interface    | public                           |
    | region       | RegionOne                        |
    | region_id    | RegionOne                        |
    | service_id   | 5fb7fd1bb2954fddb378d4031c28c0e4 |
    | service_name | ceilometer                       |
    | service_type | metering                         |
    | url          | http://controller:8777           |
    +--------------+----------------------------------+
    
    $ openstack endpoint create --region RegionOne \
      metering internal http://controller:8777
    +--------------+----------------------------------+
    | Field        | Value                            |
    +--------------+----------------------------------+
    | enabled      | True                             |
    | id           | c7009b1c2ee54b71b771fa3d0ae4f948 |
    | interface    | internal                         |
    | region       | RegionOne                        |
    | region_id    | RegionOne                        |
    | service_id   | 5fb7fd1bb2954fddb378d4031c28c0e4 |
    | service_name | ceilometer                       |
    | service_type | metering                         |
    | url          | http://controller:8777           |
    +--------------+----------------------------------+
    
    $ openstack endpoint create --region RegionOne \
      metering admin http://controller:8777
    +--------------+----------------------------------+
    | Field        | Value                            |
    +--------------+----------------------------------+
    | enabled      | True                             |
    | id           | b2c00566d0604551b5fe1540c699db3d |
    | interface    | admin                            |
    | region       | RegionOne                        |
    | region_id    | RegionOne                        |
    | service_id   | 5fb7fd1bb2954fddb378d4031c28c0e4 |
    | service_name | ceilometer                       |
    | service_type | metering                         |
    | url          | http://controller:8777           |
    +--------------+----------------------------------+
    

Install and configure components

  1. Install the packages:

    # yum install openstack-ceilometer-api \
      openstack-ceilometer-collector openstack-ceilometer-notification \
      openstack-ceilometer-central python-ceilometerclient
    
  1. Edit the /etc/ceilometer/ceilometer.conf file and complete the following actions:

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

      [database]
      ...
      connection = mongodb://ceilometer:CEILOMETER_DBPASS@controller:27017/ceilometer
      

      Replace CEILOMETER_DBPASS with the password you chose for the Telemetry service database. You must escape special characters such as ‘:’, ‘/’, ‘+’, and ‘@’ in the connection string in accordance with RFC2396.

      • 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
        memcached_servers = controller:11211
        auth_type = password
        project_domain_name = default
        user_domain_name = default
        project_name = service
        username = ceilometer
        password = CEILOMETER_PASS
        

        Replace CEILOMETER_PASS with the password you chose for the ceilometer user in the Identity service.

    • In the [service_credentials] section, configure service credentials:

      [service_credentials]
      ...
      auth_type = password
      auth_url = http://controller:5000/v3
      project_domain_name = default
      user_domain_name = default
      project_name = service
      username = ceilometer
      password = CEILOMETER_PASS
      interface = internalURL
      region_name = RegionOne
      

      Replace CEILOMETER_PASS with the password you chose for the ceilometer user in the Identity service.

Configure the Apache HTTP server

Note

The following is only required if Ceilometer’s native storage is enabled.

  • Create the /etc/httpd/conf.d/wsgi-ceilometer.conf file with the following content:

    Listen 8777
    
    <VirtualHost *:8777>
        WSGIDaemonProcess ceilometer-api processes=2 threads=10 user=ceilometer group=ceilometer display-name=%{GROUP}
        WSGIProcessGroup ceilometer-api
        WSGIScriptAlias / "/var/www/cgi-bin/ceilometer/app"
        WSGIApplicationGroup %{GLOBAL}
        ErrorLog /var/log/httpd/ceilometer_error.log
        CustomLog /var/log/httpd/ceilometer_access.log combined
    </VirtualHost>
    
    WSGISocketPrefix /var/run/httpd
    

Finalize installation

  1. Reload the Apache HTTP server:

    # systemctl reload httpd.service
    
  2. Start the Telemetry services and configure them to start when the system boots:

    # systemctl enable openstack-ceilometer-notification.service \
      openstack-ceilometer-central.service \
      openstack-ceilometer-collector.service
    # systemctl start openstack-ceilometer-notification.service \
      openstack-ceilometer-central.service \
      openstack-ceilometer-collector.service
    
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