Creating a Bandwidth Scaling Policy

Scenarios

You can automatically adjust your purchased EIP bandwidth and shared bandwidth using a bandwidth scaling policy. This section describes how to create a bandwidth scaling policy.

When creating a bandwidth scaling policy, you need to configure basic information. The system supports three types of bandwidth scaling policies: alarm-based, scheduled, and periodic.

Creating an Alarm-based Bandwidth Scaling Policy

1. Log in to the management console.
2. Under Computing, click Auto Scaling. In the navigation pane on the left, choose Bandwidth Scaling.
3. Click Create Bandwidth Scaling Policy.
4. Set parameters, such as the policy name, policy type, and trigger condition. For details, see Table 1.

   Table 1 Alarm policy parameters

   Parameter	Description	Example Value
   Region	Specifies the region where the AS group resides.	N/A
   Policy Name	Specifies the name of the bandwidth scaling policy. The name consists of only letters, digits, underscores (_), and hyphens (-).	N/A
   EIP	Specifies the public network IP address whose bandwidth needs to be scaled.	N/A
   Policy Type	Select Alarm.	Alarm
   Scaling Action	Specifies the execution action in the AS policy. The following scaling action options are available: Add When a scaling action is triggered, the bandwidth is increased. Reduce When a scaling action is triggered, the bandwidth is decreased. Set to The bandwidth is set to a fixed value. NOTE: The step (minimum unit for bandwidth adjustment) varies depending on the bandwidth value range. The bandwidth will be automatically adjusted to the nearest value according to the actual step. If the bandwidth is less than or equal to 300 Mbit/s, the default step is 1 Mbit/s.	N/A
   Cooldown Period	A cooldown period (in seconds) is the period of time between two scaling actions. AS recounts the cooldown period after a scaling action is complete. During the cooldown period, AS denies all scaling requests triggered by alarm-based policies. Scaling requests triggered manually or by scheduled or periodic policies are not affected.	300s

   Table 2 Monitoring metrics supported by the alarm policy

   Metric	Description
   Inbound Bandwidth	Indicates the network rate of inbound traffic.
   Inbound Traffic	Indicates the network traffic going out of the cloud platform.
   Outbound Bandwidth	Indicates the network rate of outbound traffic.
   Outbound Traffic	Indicates the network traffic going out of the cloud platform.

5. After setting the parameters, click Create Now.

   The newly created bandwidth scaling policy is displayed on the Bandwidth Scaling page and is in Enabled state by default.

Creating a Scheduled or Periodic Bandwidth Scaling Policy

1. Log in to the management console.
2. Under Computing, click Auto Scaling. In the navigation pane on the left, choose Bandwidth Scaling.
3. Click Create Bandwidth Scaling Policy.
4. Set parameters, such as the policy name, policy type, and trigger condition. For details, see Table 3.

   Table 3 Scheduled or periodic policy parameters

   Parameter	Description	Example Value
   Region	Specifies the region where the AS group resides.	N/A
   Policy Name	Specifies the name of the bandwidth scaling policy. The name consists of only letters, digits, underscores (_), and hyphens (-).	as-policy-p6g5
   EIP	Specifies the public network IP address whose bandwidth needs to be scaled.	N/A
   Policy Type	Specifies the policy type. You can select a scheduled or periodic policy. If you select Periodic, you are required to configure two more parameters: Time Range Specifies the time range during which the AS policy can be triggered. Period Day Week Month	N/A
   Triggered At	Specifies the time at which the AS policy is triggered.	N/A
   Scaling Action	Specifies the action to be performed. The following scaling action options are available: Add When a scaling action is triggered, the bandwidth is increased. Reduce When a scaling action is triggered, the bandwidth is decreased. Set to The bandwidth is set to a fixed value. NOTE: The step (minimum unit for bandwidth adjustment) varies depending on the bandwidth value range. The bandwidth will be automatically adjusted to the nearest value according to the actual step. If the bandwidth is less than or equal to 300 Mbit/s, the default step is 1 Mbit/s.	N/A
   Cooldown Period	A cooldown period (in seconds) is the period of time between two scaling actions. AS recounts the cooldown period after a scaling action is complete. During the cooldown period, AS denies all scaling requests triggered by alarm-based policies. Scaling requests triggered manually or by scheduled or periodic policies are not affected.	300s

5. After setting the parameters, click Create Now.