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    Kubelet command stops responding for some time intervals

    Posts: 15
    in LFS258 Class Forum

    Hi

    I have created a cluster and deployed nginx in 3 pods.
    i am facing issue with my kubelet service.
    Sometime it returns an output and sometimes it returns a message
    The connection to the server k8scp:6443 was refused - did you specify the right host or port?
    It works normally for sometime when I restart the kubelet service.
    The swapoff is disabled.
    What could be causing this and how to resolve this ?

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    Answers

    • Posts: 2,434

      Hi @aditya03,

      So far I am concerned about the Kubernetes version mismatch between the two nodes - cp and worker. The lab guide in chapter 3 specifically calls for v1.27.1 for both nodes.

      What is the version of your kubectl CLI? You can retrieve it with kubectl version -o yaml

      Are the two EC2 instances provisioned according to the video guide from the introductory chapter?

      Please provide the outputs of the following commands:

      kubectl get nodes -o wide
      kubectl get pods -A -o wide
      journalctl -u kubelet #may require 'sudo'

      Regards,
      -Chris

    • Posts: 15

      Hi Chris
      I think there is a minor difference in the kubectl versions.
      I also followed the video guide to create instances.
      PFA the screenshots for all the commands mentioned above.

      Thanks

    • Posts: 15

      ++ @chrispokorni

    • Posts: 2,434

      Hi @aditya03,

      It seems you deviated from the installation instructions.

      Please fix the following according to the latest lab guide release:
      1 - the guest OS should be Ubuntu 20.04 LTS (yours is 22.04 LTS - not yet recommended for the lab environment)
      2 - the installed Kubernetes version should be 1.27.1 for all three components: kubeadm, kubelet, and kubectl

      Also, while provisioning the EC2 instances make sure to closely follow the demo video on AWS from the introductory chapter, for VPC, SG, and instance size details.

      Regards,
      -Chris

    • Posts: 15

      Hi @chrispokorni

      I will go through the installation guide once again.
      Thanks for resolving the query.

      Regards,

      • Aditya

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