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    Lab6.4: NodePort not found on nodes

    Posts: 3
    in LFD259 Class Forum

    Hi there ... I'm struggling to verify the following:

    "Both of your nodes should be exposing the web server on port 32000."

    control-plane:

    1. lars@cp:~$  sudo lsof -Pni TCP@0.0.0.0:32000
    2. lars@cp:~$

    worker:

    1. lars@worker:~$ sudo lsof -Pni TCP@0.0.0.0:32000
    2. lars@worker:~$

    From my dev-laptop tcp-port 32000 is available on both nodes though (example for control-plane node):

    1. lars@cp:~$ curl ifconfig.io
    2. 34.79.160.208
    1.  Ubuntu-22.04  lars  RDDE1DC7  ~  src  lars.juetten  k8s_training  main  10✎  16? 
    2.  10:20:24  $  curl http://34.79.160.208:32000
    3. <!DOCTYPE html>
    4. <html>
    5. <head>
    6. <title>Welcome to nginx!</title>
    7. <style>
    8. ...

    Now I wonder ... does anybody have some advise?

    Answers

    • Posts: 2,434

      Hi @juetten,

      If you can successfully hit the same NodePort (32000) on any one of the cluster nodes, from any other node or the public internet (assuming firewall rules allows inbound traffic on the desired NodePort), then the NodePort service type is correctly configured.

      However, typical networking troubleshooting tools may not return the port number as being in use.

      Regards,
      -Chris

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