Understanding the Kubernetes networking model
The Kubernetes networking model is based on a flat address space. All pods in a cluster can directly see one another. Each pod has its own IP address. There is no need to configure any Network Address Translation (NAT). In addition, containers in the same pod share their pod's IP address and can communicate with one another through localhost. This model is pretty opinionated, but once set up, it makes life considerably easier for both developers and administrators. It makes it particularly easy to migrate traditional network applications to Kubernetes. A pod represents a traditional node and each container represents a traditional process.
Intra-pod communication (container to container)
A running pod is always scheduled on one (physical or virtual) node. This means that all the containers run on the same node and can talk to each other in various ways, such as using the local filesystem, any IPC mechanism, or using...
