Use this page to find troubleshooting resources for ACK Serverless clusters. If the console or API returns an error code, see Container Service for Kubernetes - Error Codes for resolutions. If no error code appears, use the table below to locate the right FAQ page for your scenario.
| Scenario | FAQ resources |
|---|---|
| Authorization | FAQ about authorization management — covers authentication failures, Role-Based Access Control (RBAC) authorization issues, and RAM authorization issues |
| Clusters | What do I do if a timeout error occurs when I use Cloud Shell to manage a cluster? |
| Networks | Service FAQ for Service-related issues and Ingress FAQ for Ingress-related issues |
| Application management | FAQ about applications |
| Volumes | FAQ about disks |
| Auto scaling | See the Horizontal Pod Autoscaler (HPA) and Alibaba Cloud metrics sections below |
Horizontal Pod Autoscaler (HPA)
HPA behavior and configuration
What do I do if the current field displays unknown in the HPA metrics? — applies when the HPA metrics page shows
unknowninstead of current valuesHow do I configure the metric collection interval of HPA? — applies when the default scrape interval does not match your scaling requirements
Can CronHPA and HPA interact without conflicts? — applies when you use both CronHPA and HPA on the same workload
Unexpected scaling behavior
What do I do if excess pods are added by HPA during a rolling update? — applies when HPA triggers scale-out while a rolling update is in progress
What do I do if HPA does not scale pods when the scaling threshold is reached? — applies when metrics exceed the threshold but HPA does not trigger scale-out
How do I fix the issue that excess pods are added by HPA when CPU or memory usage rapidly increases? — applies when a sudden spike in CPU or memory causes HPA to add more pods than expected
What do I do if HPA scales out an application while the metric value in the audit log is lower than the threshold? — applies when audit logs show metric values below the threshold but HPA still scales out
HPA based on Alibaba Cloud metrics
What do I do if the TARGETS column displays \<unknown\> after I run the kubectl get hpa command? — applies when
kubectl get hpashows<unknown>in the TARGETS columnWhere can I find the metrics that are supported by HPA? — reference for the full list of Alibaba Cloud metrics available to HPA