Expanding Resources as Planned

Procedure

1. Log in to the management console.
2. Under Computing, click Auto Scaling.
3. Locate the row containing the target AS group and click View AS Policy in the Operation column.
4. Click Add on the displayed AS Policies page.
5. Configure parameters. For details, see Table 1.

   Table 1 Parameters to be configured

   Parameter	Description	Example Value
   Policy Name	Specifies the name of an AS policy.	as-policy-p6g5
   Policy Type	Select Scheduled or Periodic for expanding resources at a specified time. If you select Periodic, you are required to configure two more parameters: Time Range Specifies a time range during which the AS policy can be triggered. Interval One day One week One month	N/A
   Triggered At/On	Specifies a time at which the AS policy is triggered.	N/A
   Scaling Action	Specifies an action and the number of instances. The following scaling action options are available: Add Adds instances to an AS group when the scaling action is performed. Reduce Removes instances from an AS group when the scaling action is performed. Set to Sets the expected number of instances in an AS group to a specified value.	Add 1 instance Add 10% instances The number of instances to be added is 10% of the current number of instances in the AS group. If the product of the current number of instances and the percentage is not an integer, AS automatically rounds the value up or down: Rounds down the value that is greater than 1. For example, value 12.7 is rounded down to 12. Rounds up the value that is greater than 0 and less than 1 to 1. For example, value 0.67 is rounded up to 1. For example, there are 10 instances in an AS group, and the scaling action is Add 15% instances. When the AS policy is triggered, AS calculates the number of instances to be added is 1.5 and rounds 1.5 down to 1. After the scaling action ends, there are 11 instances in the AS group.
   Cooldown Period	Specifies a period of time after each scaling action is complete. During the cooldown period, scaling actions triggered by alarms will be denied. Scheduled and periodic scaling actions are not restricted. NOTE: If a scaling action is triggered by an AS policy, the cooling duration is that which is configured for that AS policy. If a scaling action is triggered by manually changing the expected number of instances or by other actions, the cooldown period is that which is configured for the AS group.	300s

6. Click OK.

   The newly added AS policy is displayed on the AS Policy tab. In addition, the AS policy is in Enabled state by default.