第 5 章 测试和故障排除自动扩展

流程

1. 访问客户端 pod：

   $ oc rsh openstackclient

2. 获取 cirros 服务器 IP 地址并登录实例。cirros 镜像的默认密码是 "gocubsgo":

   $ openstack server list | grep cirros
   $ ssh cirros@192.168.122.8

3. 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 &

4. 从正在运行的实例退出，再返回到主机。

5. 运行 dd 命令后，预计在一些时间后，可以在实例中使用 100% 的 CPU。验证警报是否已触发：

   $ openstack alarm list
   +--------------------------------------+------------+------------------------------------+-------+----------+---------+
   | alarm_id                             | type       | name                               | state | severity | enabled |
   +--------------------------------------+------------+------------------------------------+-------+----------+---------+
   | 3000766d-a7fc-4187-98ea-cafd1239c160 | prometheus | stack1-cpu_alarm_low-n3iy7oaffq4i  | ok    | low      | True    |
   | 899f8242-96dd-4bad-a7f9-0b9526ea6032 | prometheus | stack1-cpu_alarm_high-riua4sthkvcs | alarm | low      | True    |
   +--------------------------------------+------------+------------------------------------+-------+----------+---------+

6. 大约 60 秒后，编排将启动另一个实例并将其添加到组中。要验证是否已创建实例，请输入以下命令：

   $ openstack server list
   +--------------------------------------+-----------------------------------------------------------------------------------+--------+----------------------------------------+--------+----------+
   | ID                                   | Name                                                                              | Status | Networks                               | Image  | Flavor   |
   +--------------------------------------+-----------------------------------------------------------------------------------+--------+----------------------------------------+--------+----------+
   | 53ffb3c5-a425-4929-b01d-50d653fe23f8 | autoscaling_server_stack1-autoscalinggroup-oqmxiukze6dg-qn7drottgjek-3oiecx4gkowi | ACTIVE | private=192.168.0.116, 192.168.122.204 | cirros | m1.small |
   | 9e2e9266-d69e-4de1-8b3a-e75f7111d1d9 | autoscaling_server_stack1-autoscalinggroup-oqmxiukze6dg-hdtuapbjxcow-q366nn4k5utr | ACTIVE | private=192.168.0.209, 192.168.122.205 | cirros | m1.small |
   +--------------------------------------+-----------------------------------------------------------------------------------+--------+----------------------------------------+--------+----------+

7. （可选）在另一段时间后，观察编排服务是否自动缩放为三个实例。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   |
   +--------------------------------------+-------------------------------------------------------+--------+------------+-------------+---------------------------------------+