第 4 章 测试和故障排除自动扩展

流程

1. 以 stack 用户身份登录主机环境。

2. 对于 director 环境，提供 overcloudrc 文件：

   $ source ~/overcloudrc

3. 登录到实例：

   $ ssh -i ~/mykey.pem cirros@192.168.122.8

4. 运行多个 dd 命令来生成负载：

   [instance ~]$ sudo dd if=/dev/zero of=/dev/null &
   [instance ~]$ sudo dd if=/dev/zero of=/dev/null &
   [instance ~]$ sudo dd if=/dev/zero of=/dev/null &

5. 从正在运行的实例退出，再返回到主机。

6. 运行 dd 命令后，您可以预期在实例中使用 100% CPU。验证警报是否已触发：

   $ openstack alarm list
   +--------------------------------------+--------------------------------------------+-------------------------------------+-------+----------+---------+
   | alarm_id                             | type                                       | name                                | state | severity | enabled |
   +--------------------------------------+--------------------------------------------+-------------------------------------+-------+----------+---------+
   | 022f707d-46cc-4d39-a0b2-afd2fc7ab86a | gnocchi_aggregation_by_resources_threshold | example-cpu_alarm_high-odj77qpbld7j | alarm | low      | True    |
   | 46ed2c50-e05a-44d8-b6f6-f1ebd83af913 | gnocchi_aggregation_by_resources_threshold | example-cpu_alarm_low-m37jvnm56x2t  | ok    | low      | True    |
   +--------------------------------------+--------------------------------------------+-------------------------------------+-------+----------+---------+

7. 大约 60 秒后，编排将启动另一个实例并将它添加到组中。要验证实例是否已创建，请输入以下命令：

   $ openstack server list
   +--------------------------------------+-------------------------------------------------------+--------+------------+-------------+---------------------------------------+
   | ID                                   | Name                                                  | Status | Task State | Power State | Networks                              |
   +--------------------------------------+-------------------------------------------------------+--------+------------+-------------+---------------------------------------+
   | 477ee1af-096c-477c-9a3f-b95b0e2d4ab5 | ex-3gax-4urpikl5koff-yrxk3zxzfmpf-server-2hde4tp4trnk | ACTIVE | -          | Running     | internal1=10.10.10.13, 192.168.122.17 |
   | e1524f65-5be6-49e4-8501-e5e5d812c612 | ex-3gax-5f3a4og5cwn2-png47w3u2vjd-server-vaajhuv4mj3j | ACTIVE | -          | Running     | internal1=10.10.10.9, 192.168.122.8   |
   +--------------------------------------+-------------------------------------------------------+--------+------------+-------------+---------------------------------------+

8. 在另一个短时间内，观察编排服务已自动缩放到三个实例。该配置设置为最多三个实例。验证有三个实例：

   $ openstack server list
   +--------------------------------------+-------------------------------------------------------+--------+------------+-------------+---------------------------------------+
   | ID                                   | Name                                                  | Status | Task State | Power State | Networks                              |
   +--------------------------------------+-------------------------------------------------------+--------+------------+-------------+---------------------------------------+
   | 477ee1af-096c-477c-9a3f-b95b0e2d4ab5 | ex-3gax-4urpikl5koff-yrxk3zxzfmpf-server-2hde4tp4trnk | ACTIVE | -          | Running     | internal1=10.10.10.13, 192.168.122.17 |
   | e1524f65-5be6-49e4-8501-e5e5d812c612 | ex-3gax-5f3a4og5cwn2-png47w3u2vjd-server-vaajhuv4mj3j | ACTIVE | -          | Running     | internal1=10.10.10.9, 192.168.122.8   |
   | 6c88179e-c368-453d-a01a-555eae8cd77a | ex-3gax-fvxz3tr63j4o-36fhftuja3bw-server-rhl4sqkjuy5p | ACTIVE | -          | Running     | internal1=10.10.10.5, 192.168.122.5   |
   +--------------------------------------+-------------------------------------------------------+--------+------------+-------------+---------------------------------------+