DevOps: Puppet, Docker, and Kubernetes

Forwarding container ports

In the previous chapters, you learned how to work with the Kubernetes services to forward the container port internally and externally. Now, it's time to take it a step further to see how it works.

There are four networking models in Kubernetes, and we'll explore the details in the following sections:

• Container-to-container communications
• Pod-to-pod communications
• Pod-to-service communications
• External-to-internal communications

Getting ready

In this section, we will run two nginx web apps in order to demonstrate how these four models work. The default port of nginx in Docker Hub (https://hub.docker.com/_/nginx) is 80. We will then create another nginx Docker image by modifying the nginx configuration file and Dockerfile from ...