You can collect the log of Knative components and perform operations analysis and troubleshooting based on the collected log. This topic describes how to collect the Docker stdout log of Knative components by using Log Service.

Background information

Knative components include:
  • knative-serving
    • activator
    • autoscaler
    • autoscaler-hpa
    • controller
    • webhook
  • knative-eventing
    • eventing-controller
    • eventing-webhook


  1. Log on to the ACK console.
  2. In the left-side navigation pane, click Clusters.
  3. On the Clusters page, find the cluster that you want to manage and click the name of the cluster or click Details in the Actions column. The details page of the cluster appears.
  4. In the left-side navigation pane, click Cluster Information and click the Cluster Resources tab.
  5. On the Cluster Resources tab, click the hyperlink next to Log Service Project.
  6. In the upper-right corner of the Overview page of the Log Service project, click Import Data.
  7. In the Import Data dialog box, click Docker Standard Output - Container.
  8. Complete the Docker standard output settings.
    The following content describes how to complete the Configure Data Source wizard page. For more information, see Configure log collection.
    The following sample code provides an example on how to configure the data source to collect the stdout log of controller in the knative-serving namespace. Sample code:
        "inputs": [
                "detail": {
                    "IncludeEnv": {
                    "IncludeLabel": {
              "": "controller"
                    "ExcludeLabel": {}
                "type": "service_docker_stdout"
    Data collection
    • In the IncludeEnv section, set SYSTEM_NAMESPACE to the namespace where controller is installed.
    • In the IncludeLabel section, set to the name of the component, which is controller in this example.
  9. In the Log Query section, click Try Now to view the collected log.