# Managing Workload Scaling Policies

#### Scenario

After an HPA policy is created, you can update, clone, edit, and delete the policy, as well as edit the YAML file.

#### Checking an HPA Policy

You can view the rules, status, and events of an HPA policy and handle exceptions based on the error information displayed.

1. Log in to the CCE console. In the navigation pane, choose Auto Scaling. On the Workload Scaling tab page, click in front of the target policy.
2. In the expanded area, you can view the Rules, Status, and Events tab pages. If the policy is abnormal, locate and rectify the fault based on the error information.

   You can also view the created HPA policy on the workload details page. Log in to the CCE console, choose Workloads > Deployments or Workloads > StatefulSets in the navigation pane, and choose More > Scaling in the Operation column. On the workload details page, click the Scaling tab. You can see the Auto Scaling-HPA pane, as well as the HPA policy you have configured on the Auto Scaling page.

   Table 1 Event types and names
   Event Type | Event Name | Description
   --- | --- | ---
   Normal | SuccessfulRescale | The scaling is performed successfully.
   Abnormal | InvalidTargetRange | Invalid target range.
   InvalidSelector | Invalid selector.
   FailedGetObjectMetric | Objects fail to be obtained.
   FailedGetPodsMetric | Pods fail to be obtained.
   FailedGetResourceMetric | Resources fail to be obtained.
   FailedGetExternalMetric | External metrics fail to be obtained.
   InvalidMetricSourceType | Invalid metric source type.
   FailedConvertHPA | HPA conversion failed.
   FailedGetScale | The scale fails to be obtained.
   FailedComputeMetricsReplicas | Failed to calculate metric-defined replicas.
   FailedGetScaleWindow | Failed to obtain ScaleWindow.
   FailedRescale | Failed to scale the service.

#### Updating an HPA Policy

An HPA policy is used as an example.

1. Log in to the CCE console. In the navigation pane, choose Auto Scaling. On the Workload Scaling tab page, click Update in the Operation column of the policy to be updated.
2. On the Update HPA Policy page displayed, set the policy parameters listed in Table 1.
3. Click Update.

#### Cloning an HPA Policy

1. Log in to the CCE console. In the navigation pane, choose Auto Scaling. On the Workload Scaling tab page, click Clone in the Operation column of the target policy.
2. For example, for an HPA policy, on the Create HPA Policy page, you can view that parameters such as Pod Range, Cooldown Period, and Rules have been cloned. Add or modify other policy parameters as needed.
3. Click Create to complete policy cloning. On the Workload Scaling tab page, you can view the cloned policy in the policy list.

#### Editing the YAML File (HPA Policy)

1. Log in to the CCE console. In the navigation pane, choose Auto Scaling. On the Workload Scaling tab page, choose More > Edit YAML in the Operation column of the target policy.
2. In the Edit YAML dialog box displayed, edit or download the YAML file.
3. Click the close button in the upper right corner.

#### Deleting an HPA Policy

1. Log in to the CCE console. In the navigation pane, choose Auto Scaling. On the Workload Scaling tab page, choose More > Delete in the Operation column of the target policy.
2. In the Delete HPA Policy dialog box displayed, confirm whether to delete the HPA policy.
3. Click Yes to delete the policy.

Parent topic: Scaling a Workload