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How to troubleshoot Kubernetes cluster issues?

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Troubleshooting Kubernetes cluster issues involves identifying and resolving any problems that may arise within the cluster environment.

  1. 1

    Check cluster status

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    Verify the overall health and status of the Kubernetes cluster.
    kubectl get nodes kubectl get pods --all-namespaces
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  2. 2

    Check logs for errors for the cluster

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    Inspect logs for any error messages that may indicate issues within the cluster.

    kubectl get pods --all-namespaces kubectl logs <pod_name> -n <namespace>
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  3. 3

    Check resource utilization for the cluster

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    Monitor resource usage to ensure that the cluster has enough capacity to operate efficiently.

    kubectl top nodes kubectl top pods --all-namespaces
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  4. 4

    Restart problematic pods

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    Restart pods that are experiencing issues to see if that resolves the problem.
    kubectl delete pod <pod_name> -n <namespace>
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  5. 5

    Check network connectivity for the cluster

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    Ensure that network connectivity is functioning properly within the cluster.

    kubectl run -i --tty --rm debug --image=busybox --restart=Never -- sh
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