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Chapter 4. Troubleshooting a cluster update

4.1. Gathering data about your cluster update

When reaching out to Red Hat support for issues with an update, it is important to provide data for the support team to use for troubleshooting your failed cluster update.

4.1.1. Gathering log data for a support case

To gather data from your cluster, including log data, use the oc adm must-gather command. See Gathering data about your cluster.

4.1.2. Gathering ClusterVersion history

The Cluster Version Operator (CVO) records updates made to a cluster, known as the ClusterVersion history. The entries can reveal correlation between changes in cluster behavior with potential triggers, although correlation does not imply causation.

Note

The initial, minor, and z-stream version updates are stored by the ClusterVersion history. However, the ClusterVersion history has a size limit. If the limit is reached, the oldest z-stream updates in previous minor versions are pruned to accommodate the limit.

You can view the ClusterVersion history by using the OpenShift Container Platform web console or by using the OpenShift CLI (oc).

4.1.2.1. Gathering ClusterVersion history in the OpenShift Container Platform web console

You can view the ClusterVersion history in the OpenShift Container Platform web console.

Prerequisites

  • You have access to the cluster as a user with the cluster-admin role.
  • You have access to the OpenShift Container Platform web console.

Procedure

  • From the web console, click Administration Cluster Settings and review the contents of the Details tab.

4.1.2.2. Gathering ClusterVersion history using the OpenShift CLI (oc)

You can view the ClusterVersion history using the OpenShift CLI (oc).

Prerequisites

  • You have access to the cluster as a user with the cluster-admin role.
  • You have installed the OpenShift CLI (oc).

Procedure

  1. View the cluster update history by entering the following command: 

    $ oc describe clusterversions/version

    Example output

      Desired:
    Channels:
      candidate-4.13
      candidate-4.14
      fast-4.13
      fast-4.14
      stable-4.13
    Image:    quay.io/openshift-release-dev/ocp-release@sha256:a148b19231e4634196717c3597001b7d0af91bf3a887c03c444f59d9582864f4
    URL:      https://access.redhat.com/errata/RHSA-2023:6130
    Version:  4.13.19
  History:
    Completion Time:    2023-11-07T20:26:04Z
    Image:              quay.io/openshift-release-dev/ocp-release@sha256:a148b19231e4634196717c3597001b7d0af91bf3a887c03c444f59d9582864f4
    Started Time:       2023-11-07T19:11:36Z
    State:              Completed
    Verified:           true
    Version:            4.13.19
    Completion Time:    2023-10-04T18:53:29Z
    Image:              quay.io/openshift-release-dev/ocp-release@sha256:eac141144d2ecd6cf27d24efe9209358ba516da22becc5f0abc199d25a9cfcec
    Started Time:       2023-10-04T17:26:31Z
    State:              Completed
    Verified:           true
    Version:            4.13.13
    Completion Time:    2023-09-26T14:21:43Z
    Image:              quay.io/openshift-release-dev/ocp-release@sha256:371328736411972e9640a9b24a07be0af16880863e1c1ab8b013f9984b4ef727
    Started Time:       2023-09-26T14:02:33Z
    State:              Completed
    Verified:           false
    Version:            4.13.12
  Observed Generation:  4
  Version Hash:         CMLl3sLq-EA=
Events:                 <none>

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