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Edge

The following are common scenarios that you may encounter when using Edge.

Scenario - Override or Reconfigure Read-only File System Stage​

If you need to override or reconfigure the read-only file system, you can do so using the following steps.

Debug Steps​

  1. Power on the Edge host.

  2. Press the keyboard key E after highlighting the menu in grubmenu.

  3. Type rd.cos.debugrw and press Enter.

    The grub menu displays with the command rd.cos.debugrw typed in the terminal.

  4. Press the keys Ctrl + X to boot the system.

  5. Make the required changes to the image.

  6. Reboot the system to resume the default read-only file system.

Scenario - Pod State Unknown After Reboot with Overlay Network Enabled​

On slower networks, it's possible that this is due to KubeVip leader election timeouts. To debug, you can manually adjust the values of related environment variables in the KubeVip DaemonSet with the following steps.

Debug Steps​

  1. Ensure you can access the cluster using kubectl. For more information, refer to Access Cluster with CLI.

  2. Issue the following command:

kubectl edit ds kube-vip-ds --namespace kube-system
  1. In the env of the KubeVip service, modify the environment variables to have the following corresponding values.
env:
  - name: vip_leaderelection
    value: "true"
  - name: vip_leaseduration
    value: "30"
  - name: vip_renewdeadline
    value: "20"
  - name: vip_retryperiod
    value: "4"
  1. Within a minute, the old Pods in unknown state will be terminated and Pods will come up with the updated values.

Scenario - Palette Webhook Pods Fail to Start​

If the Palette webhook pods fail to start, it may be due to the palette-lite-controller-manager pods encountering issues or not being available. Use the following steps to troubleshoot and resolve the issue.

Debug Steps​

  1. Ensure you can access the Kubenetes cluster using kubectl. For more information, refer to Access Cluster with CLI.

  2. Open up a terminal session and issue the following command to check the status of the palette-lite-controller-manager pods.

    kubectl get pods --all-namespaces | grep  palette-lite-controller-manager
    cluster-661acf1dfc746f8217de2712   palette-lite-controller-manager-6856746c8-7p9k2                 2/2     Running   0             6m

    If the pods are active and available with an age greater than five minutes, then the issue may be with the Palette webhook. Proceed to the next step.

    info

    If the pods are not active, use the command kubectl describe pod <pod-name> --namespace palette-system to check the pod logs for more information about why the pods are not starting. Replace <pod-name> with the name of the pod that is not starting. Scroll down to the Events section to view the logs. You can try to delete the pod and check if it starts successfully. If the issue persists, contact our support team by emailing.

  3. Check the status of the Palette webhook pods. Use the following command to verify the status.

    kubectl get pods --namespace palette-system
    No resources found in palette-system namespace

    If the output displays a message stating No resources found in palette-system namespace then the lacking Palette webhook pods are the issue for the cluster not starting.

  4. Delete all existing palette-lite-controller-manager pods using the following commands.

    export NAMESPACE=$(kubectl get pods --all-namespaces | grep palette-lite-controller-manager | awk '{print $1}')
    export PALETTE_POD_NAME=$(kubectl get pods --all-namespaces | grep palette-lite-controller-manager | awk '{print $2}')
    kubectl delete pod $PALETTE_POD_NAME --namespace $NAMESPACE

  5. After a few seconds, verify that the palette-lite-controller-manager pods are active and available.

     kubectl get pods --all-namespaces | grep palette-lite-controller-manager

  6. Check the status of the Palette webhook pods. A successful output should display the status of the palette-webhook pods.

    kubectl get pods --namespace palette-system
     NAME                               READY   STATUS    RESTARTS   AGE
     palette-webhook-548c55568c-p74zz   1/1     Running   0          2m

  7. If you continue to encounter issues, contact our support team by emailing support@spectrocloud.com so that we can provide you with further guidance.