blue-green-dreams

Overview

A trivial web application (for now) whose deployment is fully automated via kubernetes and linode.

"Blue Green Dreams" refers a) the dream of blue-green deployments of kubernetes clusters and b) the dream (present and future) of a deeply human and colorful reality.

It completely builds, deploys, tests and destroys a web application running on a k8s cluster.

Development Environment

A make target will perform steps below (without pushing to dockerhub)

Getting Started

Environment variables

The following environment variables are required:

• LINODE_CLI_TOKEN

• SSH_NGINX_LB_PRIVATE_KEY_B64

  This can be generated with ssh-keygen -t ed25519 -f blue-green-keys -N ''. And then base64 encode it with base64 -w 0 < blue-green-keys (base64 -i blue-green-keys | tr -d '\n' on Mac).

• SSH_NGINX_LB_PUBLIC_KEY

  This will be the contents of the blue-green-keys.pub file generated with the earlier ssh-keygen -t ed25519 -f blue-green-keys -N ''.

• NGINX_LB_ROOT_PASSWORD

  This will be the root password to the linode VM instance, this is requried to be set when creating an instance.

Command examples

• $ make build

• $ make build_deploy

• $ make alias

• cut-paste the alias command or place into .bashrc

• Ensure your API key is set: LINODE_CLI_TOKEN=f1bb76c659875deec37108a58xxxxx

• Try the following commands

• $ bgdctl deploy dev

• $ bgdctl switch create dev

• $ bgdctl switch delete dev

• $ bgdctl switch-set-ip-target-to-cluster dev blue

• $ bgdctl switch-set-ip-target-to-cluster dev green

• $ bgdctl switch-set-ip-target-to-cluster prod blue

• $ bgdctl switch-set-ip-target-to-cluster prod green