5.5. 示例：监控实例的磁盘活动

流程

1. 检查现有项目，再选择您要监控的项目的适当 UUID。本例使用 admin 租户：

   $ openstack project list
   +----------------------------------+----------+
   | ID                               | Name     |
   +----------------------------------+----------+
   | 745d33000ac74d30a77539f8920555e7 | admin    |
   | 983739bb834a42ddb48124a38def8538 | services |
   | be9e767afd4c4b7ead1417c6dfedde2b | demo     |
   +----------------------------------+----------+

2. 使用项目 UUID 创建警报，以分析 admin 租户中实例生成的所有读取请求的 sum （）。您可以使用 --query 参数进一步限制查询：

   # openstack alarm create --type gnocchi_aggregation_by_resources_threshold --name iops-monitor-read-requests --metric disk.read.requests.rate --threshold 42000 --aggregation-method sum --resource-type instance --query '{"=": {"project_id": "745d33000ac74d30a77539f8920555e7"}}'
   +---------------------------+-----------------------------------------------------------+
   | Field                     | Value                                                     |
   +---------------------------+-----------------------------------------------------------+
   | aggregation_method        | sum                                                       |
   | alarm_actions             | []                                                        |
   | alarm_id                  | 192aba27-d823-4ede-a404-7f6b3cc12469                      |
   | comparison_operator       | eq                                                        |
   | description               | gnocchi_aggregation_by_resources_threshold alarm rule     |
   | enabled                   | True                                                      |
   | evaluation_periods        | 1                                                         |
   | granularity               | 60                                                        |
   | insufficient_data_actions | []                                                        |
   | metric                    | disk.read.requests.rate                                   |
   | name                      | iops-monitor-read-requests                                |
   | ok_actions                | []                                                        |
   | project_id                | 745d33000ac74d30a77539f8920555e7                          |
   | query                     | {"=": {"project_id": "745d33000ac74d30a77539f8920555e7"}} |
   | repeat_actions            | False                                                     |
   | resource_type             | instance                                                  |
   | severity                  | low                                                       |
   | state                     | insufficient data                                         |
   | state_timestamp           | 2016-11-08T23:41:22.919000                                |
   | threshold                 | 42000.0                                                   |
   | time_constraints          | []                                                        |
   | timestamp                 | 2016-11-08T23:41:22.919000                                |
   | type                      | gnocchi_aggregation_by_resources_threshold                |
   | user_id                   | 8c4aea738d774967b4ef388eb41fef5e                          |
   +---------------------------+-----------------------------------------------------------+