Chapter05

Kubernetes in Action, 2nd Edition

Chapter 5. Running applications in Pods

Deploying resources

• ../scripts/apply.sh - helper script to deploy resource yaml files and update prefix values. Resource files should be specified as arguments.

Creating the pod manifest for the Kiada application

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

Modifying the application to read from standard input

Building the kiada: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:

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

Adding the Envoy proxy container to the kiada pod

Building the kiada-ssl-proxy:0.1 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:

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

Creating a pod with init containers

Building the init-demo:0.1 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:0.1 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:

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