Chapter05

Kubernetes in Action, 2nd Edition

Chapter 5. Running applications in Pods

Creating the pod manifest for the kubia application

• kubia.yaml - YAML manifest file for the kubia pod

Modifying the application to read from standard input

Building the kubia:1.0-stdin image:

• Makefile - contains commands to build and push the image
• Dockerfile - Docker instructions for building the image
• app.js - application code (JavaScript)

Deploying the pod:

• kubia-stdin.yaml - manifest for the kubia-stdin pod
• kubia-stdin-once.yaml - manifest for the kubia-stdin-once pod, which uses stdinOnce: true
• kubia-stdin-tty.yaml - manifest for the kubia-stdin-tty pod, which uses tty: true

Adding the Envoy proxy container to the kubia pod

Building the kubia-ssl-proxy:1.0 image:

• Makefile - contains commands to build and push the image
• Dockerfile - Docker instructions for building the image
• envoy.yaml - Envoy proxy configuration file
• example-com.crt - Server certificate used by Envoy
• example-com.key - Private key used by Envoy

Deploying the pod:

• kubia-ssl.yaml - Manifest for the kubia-ssl pod

Creating a pod with init containers

Building the init-demo:1.0 image:

• Makefile - contains commands to build and push the image
• Dockerfile - Docker instructions for building the image
• docker_entrypoint.sh - Shell script that runs in the container

Building the network-connectivity-checker:1.0 image:

• Makefile - contains commands to build and push the image
• Dockerfile - Docker instructions for building the image
• docker_entrypoint.sh - Shell script that runs in the container

Deploying the pod:

• kubia-init.yaml - Manifest for the kubia-init pod
• kubia-init-slow.yaml - Manifest for the kubia-init-slow pod, whose init container takes 60s to start