Container Intelligent Service provides the cluster diagnostics feature to allow you to diagnose pods, Services, and Ingresses with one click and help you locate the cause. This topic describes how to use the cluster diagnostics feature in an Alibaba Cloud Container Compute Service (ACS) cluster.
Prerequisites
An ACS cluster is created. For more information, see Create an ACS cluster.
The ACS cluster is in the Running state.
NoteYou can log on to the ACS console, go to the Clusters page, and verify that the Cluster Status column displays Running.
Introduction to cluster diagnostics
Container Intelligent Service provides the following diagnostic items.
Diagnostic item | Description |
Diagnose pod status issues, such as pod startup failures or frequent pod restarts. | |
Diagnose Service issues, such as Service configurations, resource quotas, and abnormal events. | |
Diagnose Ingress-related issues in traffic routing configurations. |
Configure diagnostics
When you use the cluster diagnostics feature, the system runs a data collection program on each node in the cluster and collects diagnostic results. The program collects the following information, the system version, loads, status of container components, and key error messages in system logs. The program does not collect business information or sensitive data.
The procedures for configuring pod, Service, and Ingress diagnostics are similar. The following section uses pod diagnostics as an example to demonstrate how to configure the diagnostics feature.
Log on to the ACS console. In the left-side navigation pane, click Clusters.
On the Clusters page, click the name of the cluster that you want to manage. In the left-side navigation pane, choose and follow the on-screen instructions to complete authorization.
On the Diagnosis page, click Pod diagnosis.
On the Pod diagnosis page, click Diagnosis.
In the Select Pod panel, specify Namespace and Pod, read the warning and select I know and agree, and then click Create diagnosis.
You can view the diagnostic progress on the page. After the diagnostic is complete, the page displays the diagnostic results and diagnostic items. You can check the cause and fix the issues.
View diagnostic results
On the Pod diagnosis page, click Diagnosis details in the Operation column of the diagnostic report in the list to view the diagnostic results on the details page.
The diagnostic items may vary based on the cluster configuration. The actual diagnostic items on the diagnostic page shall prevail.
Diagnostic item | Flag | Description |
Pod diagnostics |
| Pod diagnostics consist of the Pod and ClusterComponent diagnostic items. The system checks for pod anomalies based on pod status and cluster component status. On the diagnostic details page, you can view the pod diagnostic results, repair suggestions, and diagnostic items. Move the pointer over the Diagnostic items with the Abnormal or Warning flag are displayed on the Troubleshoot tab. When a diagnostic item displays the Abnormal flag, you can move the pointer over Details in the Status column to view details about the issue. |
Service diagnostics | Service diagnostics consist of the Service and ResourceQuotas diagnostic items. These diagnostic items help you identify Service anomalies based on the billing method of Classic Load Balancer (CLB) instances, certificates, quotas, and abnormal events. Move the pointer over the Diagnostic items with the Abnormal or Warning flag are displayed on the Troubleshoot tab. When a diagnostic item displays the Abnormal flag, you can move the pointer over Details in the Status column to view details about the issue. | |
Ingress diagnostics | Ingress diagnostics consist of the Ingress, Addon, and SLB diagnostic items. These diagnostic items help you identify Ingress anomalies based on the status of Ingresses, Ingress plug-ins, and Server Load Balancer (SLB) instances. Move the pointer over the Diagnostic items with the Abnormal or Warning flag are displayed on the Troubleshoot tab. When a diagnostic item displays the Abnormal flag, you can move the pointer over Details in the Status column to view details about the issue. |
: No operations are required. 
: Confirm the severity of the issue. Troubleshoot the issues that may cause cluster anomalies. 
: Troubleshoot the issues at the earliest opportunity to avoid cluster errors. 
: The diagnostic is not completed or the diagnostic result is unknown. 
icon to the right of a diagnostic item to view information about the diagnostic item.