Managing Workload Scaling Policies

Scenario

After an HPA or CustomedHPA policy is created, you can update 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 and click the cluster name to access the cluster console.
2. In the navigation pane, choose Policies. On the page displayed, click the HPA Policies tab and then next to the target HPA policy.
3. In the expanded area, choose View Events in the Operation column. If the policy malfunctions, locate and rectify the fault based on the error message displayed on the page.
   

   You can also view the created HPA policy on the workload details page.

   1. Log in to the CCE console and click the cluster name to access the cluster console.
   2. In the navigation pane, choose Workloads. Click the workload name to view its details.
   3. On the workload details page, switch to the Auto Scaling tab page to view the HPA policies or CustomedHPA policies. You can also view the scaling policies you configured on the Policies 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.

Viewing a CustomedHPA Policy

You can view the rules and latest status of a CustomedHPA policy and rectify faults based on the error information displayed.

1. Log in to the CCE console and click the cluster name to access the cluster console.
2. In the navigation pane, choose Policies. On the page displayed, click the CustomHPA Policies tab and then next to the target CustomHPA policy.
3. In the expanded area, if the policy is abnormal on the Rules tab page, click Details in Latest Status and locate the fault based on the information displayed.
   

   You can also view the created HPA policy on the workload details page.

   1. Log in to the CCE console and click the cluster name to access the cluster console.
   2. In the navigation pane, choose Workloads. Click the workload name to view its details.
   3. On the workload details page, switch to the Auto Scaling tab page to view the HPA policies or CustomedHPA policies. You can also view the scaling policies you configured on the Policies page.

Editing an HPA or CustomedHPA Policy

An HPA policy is used as an example.

1. Log in to the CCE console and click the cluster name to access the cluster console.
2. In the navigation pane, choose Policies. On the page displayed, click the HPA Policies tab. Locate the row containing the target policy and choose More > Edit in the Operation column.
3. On the Edit HPA Policy page, configure policy parameters listed in Table 1.
4. Click OK.

Editing the YAML File (HPA Policy)

1. Log in to the CCE console and click the cluster name to access the cluster console.
2. In the navigation pane, choose Policies. On the page displayed, click the HPA Policies tab. Locate the row containing the target policy and click Edit YAML in the Operation column.
3. In the dialog box displayed, edit or download the YAML file.

Viewing the YAML File (CustomedHPA Policy)

1. Log in to the CCE console and click the cluster name to access the cluster console.
2. In the navigation pane, choose Policies. On the page displayed, click the CustomedHPA Policies tab, locate the row containing the target policy, and choose More > View YAML in the Operation column.
3. In the dialog box displayed, copy and download the YAML file but you are not allowed to modify it.
4. Click the close button in the upper right corner.

Deleting an HPA or CustomedHPA Policy

1. Log in to the CCE console and click the cluster name to access the cluster console.
2. In the navigation pane, choose Policies. Choose More > Delete in the Operation column of the target policy.
3. In the dialog box displayed, click Yes.