安装和配置

安装和配置

这个部分描述如何在控制节点上安装和配置计量(Telemetry)服务,即OpenStack Ceilometer项目。计量服务收集OpenStack大部分服务的测量结果,且可选择性的触发警告。

前提条件

安装和配置Telemetry服务之前,你必须创建创建一个数据库、服务凭证和API端点。但是,不像其他服务,Telemetry服务使用NoSQL 数据库。在进一步处理之前查看 ref:environment-nosql-database 来安装和配置MongoDB。

  1. 创建 ceilometer 数据库:

    # 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" ] }
    

    用合适的密码替换 CEILOMETER_DBPASS

  1. 获得 admin 凭证来获取只有管理员能执行命令的访问权限:

    $ source admin-openrc.sh
    
  2. 要创建服务证书,完成这些步骤:

    • 创建 ceilometer 用户:

      $ openstack user create --domain default --password-prompt ceilometer
      User Password:
      Repeat User Password:
      +-----------+----------------------------------+
      | Field     | Value                            |
      +-----------+----------------------------------+
      | domain_id | default                          |
      | enabled   | True                             |
      | id        | c859c96f57bd4989a8ea1a0b1d8ff7cd |
      | name      | ceilometer                       |
      +-----------+----------------------------------+
      
    • 添加 admin 角色到 ceilometer 用户上。

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

      注解

      这个命令执行后没有输出。

    • 创建 ceilometer 服务实体:

      $ openstack service create --name ceilometer \
        --description "Telemetry" metering
      +-------------+----------------------------------+
      | Field       | Value                            |
      +-------------+----------------------------------+
      | description | Telemetry                        |
      | enabled     | True                             |
      | id          | 5fb7fd1bb2954fddb378d4031c28c0e4 |
      | name        | ceilometer                       |
      | type        | metering                         |
      +-------------+----------------------------------+
      
  1. 创建Telemetry服务API端点

    $ 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           |
    +--------------+----------------------------------+
    

安全并配置组件

  1. 安装软件包:

    # yum install openstack-ceilometer-api \
      openstack-ceilometer-collector openstack-ceilometer-notification \
      openstack-ceilometer-central openstack-ceilometer-alarm \
      python-ceilometerclient
    
  1. 编辑 /etc/ceilometer/ceilometer.conf,同时完成如下动作:

    • [database] 部分,配置数据库访问:

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

      用你选择的Telemtry服务数据库密码替换 CEILOMETER_DBPASS。按照RFC2396,你必须在连接字符串转义特殊字符,如:’:’,’/’,’+’和’@’。

    • 在 “[DEFAULT]” 和 “[oslo_messaging_rabbit]”部分,配置 “RabbitMQ” 消息队列访问:

      [DEFAULT]
      ...
      rpc_backend = rabbit
      
      [oslo_messaging_rabbit]
      ...
      rabbit_host = controller
      rabbit_userid = openstack
      rabbit_password = RABBIT_PASS
      

      用你在 “RabbitMQ” 中为 “openstack” 用户选择的密码替换 “RABBIT_PASS”。

    • 在 “[DEFAULT]” 和 “[keystone_authtoken]” 部分,配置认证服务访问:

      [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 = ceilometer
      password = CEILOMETER_PASS
      

      用你在认证服务中为 “ceilometer” 选择的密码替换 “CEILOMETER_PASS”。

    • 在 “[service_credentials]” 部分,配置服务证书:

      [service_credentials]
      ...
      os_auth_url = http://controller:5000/v2.0
      os_username = ceilometer
      os_tenant_name = service
      os_password = CEILOMETER_PASS
      os_endpoint_type = internalURL
      os_region_name = RegionOne
      

      用你在认证服务中为 “ceilometer” 选择的密码替换 “CEILOMETER_PASS”。

    • (可选的)为帮助排错,在 “[DEFAULT]”部分启用详细日志。

      [DEFAULT]
      ...
      verbose = True
      

完成安装

  • 启动Telemetry服务并将其配置为随系统启动:

    # systemctl enable openstack-ceilometer-api.service \
      openstack-ceilometer-notification.service \
      openstack-ceilometer-central.service \
      openstack-ceilometer-collector.service \
      openstack-ceilometer-alarm-evaluator.service \
      openstack-ceilometer-alarm-notifier.service
    # systemctl start openstack-ceilometer-api.service \
      openstack-ceilometer-notification.service \
      openstack-ceilometer-central.service \
      openstack-ceilometer-collector.service \
      openstack-ceilometer-alarm-evaluator.service \
      openstack-ceilometer-alarm-notifier.service
    
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