1. Documentation
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Troubleshooting and maintaining telco core CNF clusters

Troubleshooting and maintenance are weekly tasks that can be a challenge if you do not have the tools to reach your goal, whether you want to update a component or investigate an issue. Part of the challenge is knowing where and how to search for tools and answers.

To maintain and troubleshoot a bare-metal environment where high-bandwidth network throughput is required, see the following procedures.

This troubleshooting information is not a reference for configuring OKD or developing Cloud-native Network Function (CNF) applications.

For information about developing CNF applications for telco, see Red Hat Best Practices for Kubernetes.

Cloud-native Network Functions

If you are starting to use OKD for telecommunications Cloud-native Network Function (CNF) applications, learning about CNFs can help you understand the issues that you might encounter.

To learn more about CNFs and their evolution, see VNF and CNF, what’s the difference?.

Getting Support

If you experience difficulty with a procedure, visit the Red Hat Customer Portal. From the Customer Portal, you can find help in various ways:

  • Search or browse through the Red Hat Knowledgebase of articles and solutions about Red Hat products.

  • Submit a support case to Red Hat Support.

  • Access other product documentation.

To identify issues with your deployment, you can use the debugging tool or check the health endpoint of your deployment. After you have debugged or obtained health information about your deployment, you can search the Red Hat Knowledgebase for a solution or file a support ticket.

About the Red Hat Knowledgebase

The Red Hat Knowledgebase provides rich content aimed at helping you make the most of Red Hat’s products and technologies. The Red Hat Knowledgebase consists of articles, product documentation, and videos outlining best practices on installing, configuring, and using Red Hat products. In addition, you can search for solutions to known issues, each providing concise root cause descriptions and remedial steps.

Searching the Red Hat Knowledgebase

In the event of an OKD issue, you can perform an initial search to determine if a solution already exists within the Red Hat Knowledgebase.

Prerequisites

  • You have a Red Hat Customer Portal account.

Procedure

  1. Log in to the Red Hat Customer Portal.

  2. Click Search.

  3. In the search field, input keywords and strings relating to the problem, including:

    • OKD components (such as etcd)

    • Related procedure (such as installation)

    • Warnings, error messages, and other outputs related to explicit failures

  4. Click the Enter key.

  5. Optional: Select the OKD product filter.

  6. Optional: Select the Documentation content type filter.

Submitting a support case

Prerequisites

  • You have access to the cluster as a user with the cluster-admin role.

  • You have installed the OpenShift CLI (oc).

  • You have a Red Hat Customer Portal account.

  • You have a Red Hat Standard or Premium subscription.

Procedure

  1. Log in to the Customer Support page of the Red Hat Customer Portal.

  2. Click Get support.

  3. On the Cases tab of the Customer Support page:

    1. Optional: Change the pre-filled account and owner details if needed.

    2. Select the appropriate category for your issue, such as Bug or Defect, and click Continue.

  4. Enter the following information:

    1. In the Summary field, enter a concise but descriptive problem summary and further details about the symptoms being experienced, as well as your expectations.

    2. Select OKD from the Product drop-down menu.

    3. Select 4 from the Version drop-down.

  5. Review the list of suggested Red Hat Knowledgebase solutions for a potential match against the problem that is being reported. If the suggested articles do not address the issue, click Continue.

  6. Review the updated list of suggested Red Hat Knowledgebase solutions for a potential match against the problem that is being reported. The list is refined as you provide more information during the case creation process. If the suggested articles do not address the issue, click Continue.

  7. Ensure that the account information presented is as expected, and if not, amend accordingly.

  8. Check that the autofilled OKD Cluster ID is correct. If it is not, manually obtain your cluster ID.

    • To manually obtain your cluster ID using the OKD web console:

      1. Navigate to Home → Overview.

      2. Find the value in the Cluster ID field of the Details section.

    • Alternatively, it is possible to open a new support case through the OKD web console and have your cluster ID autofilled.

      1. From the toolbar, navigate to (?) Help → Open Support Case.

      2. The Cluster ID value is autofilled.

    • To obtain your cluster ID using the OpenShift CLI (oc), run the following command:

      $ oc get clusterversion -o jsonpath='{.items[].spec.clusterID}{"\n"}'

  9. Complete the following questions where prompted and then click Continue:

    • What are you experiencing? What are you expecting to happen?

    • Define the value or impact to you or the business.

    • Where are you experiencing this behavior? What environment?

    • When does this behavior occur? Frequency? Repeatedly? At certain times?

  10. Upload relevant diagnostic data files and click Continue. It is recommended to include data gathered using the oc adm must-gather command as a starting point, plus any issue specific data that is not collected by that command.

  11. Input relevant case management details and click Continue.

  12. Preview the case details and click Submit.