Help Center/ Ubiquitous Cloud Native Service/ User Guide/ Observability/ Logging/ Collecting Control Plane Component Logs
Updated on 2024-06-17 GMT+08:00
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Collecting Control Plane Component Logs

Billing

LTS does not charge you for creating log groups and offers a free quota for log collection every month. You pay only for log volume that exceeds the quota.

Constraints

  • Huawei Cloud clusters must be of v1.21.7-r0 or later, v1.23.5-r0 or later, or v1.25.
  • There is required LTS resource quota. For details about the default LTS quota, see Basic Resources.

Control Plane Components

There are three control plane log types. Each log stream corresponds to a component of the Kubernetes control plane. To learn more about these components, see Kubernetes Components.

Table 1 Control plane components

Log Type

Component

Log Stream

Description

Control plane component logs

kube-apiserver

kube-apiserver-{{clusterID}}

It exposes Kubernetes APIs. For more information, see kube-apiserver.

kube-controller-manager

kube-controller-manager-{{clusterID}}

It manages controllers and embeds the core control loops shipped with Kubernetes. For more information, see kube-controller-manager.

kube-scheduler

kube-scheduler-{{clusterID}}

It manages when and where to run Pods in your cluster. For more information, see kube-scheduler.

Enabling Log Collection for an On-Premises Cluster

The cloud native logging add-on is not installed in a cluster.

When installing the cloud native logging add-on, you can select control plane component logs to create a default log collection policy, so that this add-on collects all component logs and reports them to LTS. For details about the add-on installation, see Log Collection.

The cloud native logging add-on has been installed in a cluster.

  1. Log in to the UCS console, choose Fleets, and click the fleet name to access the fleet details page. Choose Container Clusters, click the cluster name to access the cluster details page, and choose Logging.

  2. Click View Log Collection Policies in the upper right corner.

    All log collection policies reported to LTS are displayed.

  3. Click Create Log Policy and configure parameters as required.

    Policy Template: If no log collection policy is selected during add-on installation or the log collection policy is deleted, you can use this option to create a default log collection policy.

    Figure 1 Creating a log collection policy
  4. On the Logging page, click the Control Plane Logs tab. Select the log stream configured in the log policy to view the logs reported to LTS.
    Figure 2 Viewing logs

Enabling Log Collection for a Huawei Cloud Cluster

Enabling log collection during cluster creation

  1. Log in to the CCE console.
  2. Click Buy Cluster from the top menu.
  3. On the Select Add-on page, select Cloud Native Logging.

  4. On the Add-on Configuration page, select Custom Installation for Cloud Native Logging and then select control plane logs.

    • Standard output logs: A log collection policy named default-stdout will be created, and standard output logs in all namespaces will be reported to LTS.
    • Kubernetes events: A log collection policy named default-event will be created, and Kubernetes events in all namespaces will be reported to LTS.
  5. Click Next: Confirm in the lower right corner. In the displayed dialog box, click Submit.

Enabling log collection for an existing cluster

  1. Log in to the UCS console, choose Fleets, and click the fleet name to access the fleet details page. Choose Container Clusters, click the cluster name to access the cluster details page, and choose Logging.
  2. Click the Control Plane Logs tab, select the control plane components whose logs need to be collected, and click Enable.

Viewing Control Plane Component Logs

Viewing control plane component logs on the UCS console

  1. Log in to the UCS console, choose Fleets, and click the fleet name to access the fleet details page. Choose Container Clusters, click the cluster name to access the cluster details page, and choose Logging.
  2. Click the Control Plane Logs tab and select the component whose logs to be viewed. For details about available control plane log types, see Control Plane Components. For details about operations, see LTS User Guide.

Viewing control plane component logs on the LTS console

  1. Log in to the LTS console and choose Log Management.
  2. Query the log group based on the cluster ID and click the log group name to view the log stream. For details, see LTS User Guide.

Disabling Log Collection of a Huawei Cloud Cluster

  1. Log in to the UCS console, choose Fleets, and click the fleet name to access the fleet details page. Choose Container Clusters, click the cluster name to access the cluster details page, and choose Logging.
  2. Click the Control Plane Logs tab, click Configure Control Plane Component Logs in the upper right corner, and modify the log settings.

  3. Determine whether to enable logging for each component and click OK.

    After you disable control plane logging, logs are no longer written to the original log stream, but the existing logs will not be deleted and expenses may be incurred for this.

Parent topic: Logging