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Kubernetes Networking Basics

In General
May 26, 2021


Kubernetes networking is an integral part of managing and making communication easier within a Kubernetes cluster. It manages a wide range of operations, such as:

  • Handling internal container communication
  • Exposing the containers to the internet

This article introduces you to key Kubernetes networking concepts.

(This article is part of our Kubernetes Guide. Use the right-hand menu to navigate.)

Networking in Kubernetes

First, let’s review the basic networking types in a Kubernetes cluster:

  • Container-to-container networking
  • Pod-to-pod networking
  • Pod-to-service networking
  • Internet-to-service networking

Now, let’s take a look at how each type operates to provide connectivity within the cluster.

Kubernetes Clusters

Container-to-container networking

In the most basic configurations, container to container communication within a single pod takes place via the localhost and port numbers. This is possible because the containers in the pod are located in the same network namespace.

A network namespace…



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