There are plenty of choices you can use to implement networking in Kubernetes. Kubernetes itself doesn't care how you implement it, but you must meet its three fundamental requirements:
- All containers should be accessible to each other without NAT, regardless of which nodes they are on
- All nodes should communicate with all containers
- The IP container should see itself the same way as the others see it
Before getting into anything further, we'll first review how does the default container networking works. That's the pillar of the network to make all of this possible.
