4.19. Pod-to-Pod Communication - Misconception

dadie

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?

chrispokorni

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

Hi Chris,

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

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