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4.19. Pod-to-Pod Communication - Misconception

dadie
dadie Posts: 3
in LFS258 Class Forum

Hi there,

This sentence in 4.19 made me think:

While a CNI plugin can be used to configure the network of a pod and provide a single IP per pod, CNI does not help you with pod-to-pod communication across nodes.

I don't understand/agree with that statement, since weavenet, calico and many other overlay networks can be installed as CNI plugins...

Did I miss something regarding CNI's inner workings, or is that sentence incorrect?

Comments

  • chrispokorni
    chrispokorni Posts: 2,629

    Hi,
    As far as the documentation goes (and the statement above), CNI only solves the networking for containers and not pod-to-pod communication.
    A CNI plugin however, (such as Calico) helps with the one IP-per-pod assignment and pod-to-pod communication.
    I hope this helps to clarify the concepts.
    Regards,
    -Chris

  • dadie
    dadie Posts: 3

    Hi Chris,

    Thanks for your reply! I didn't get a notification for it.

    Better later than never, it helps a lot: thanks!

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