Project Pumpernickel

This demo project hosts Wordpess and MySQL in Kubernetes over both AWS (EKS) and GCP (GKE).

Prerequisuites

Working AWS (EKS) and GCP (GKE) Kubernetes Clusters
Private VPC peering between the AWS VPC and the GCP VPC
Portworx for persistent volume management

Tools

k14s - Kubernetes Tools that follow Unix philosophy to be simple and composable
- k14s/ytt - https://get-ytt.io - ytt is a templating tool that understands YAML structure allowing you to focus on your data instead of how to properly escape it.
- k14s/kapp - https://get-kapp.io/ - is a simple deployment tool focused on the concept of "Kubernetes application" — a set of resources with the same label.
k9s - https://k9ss.io/ - Kubernetes CLI To Manage Your Clusters In Style
Terraform - https://www.terraform.io/ - Write, Plan, and Create Infrastructure as Code

Details

Simple Wordpress Site on Kubernetes
MySQL Multi-Master Asynchronous MIXED mode Replication between AWS and GCP
Route53 DNS management with Terraform

Setup

Deploy to AWS

cd app
ytt -f . -v k8s_env="chris-aws" | \
kapp deploy -a simple-app -f- --diff-changes --kubeconfig-context chris-aws

Deploy to GCP

cd app
ytt -f . -v k8s_env="chris-gcp" | \
kapp deploy -a simple-app -f- --diff-changes --kubeconfig-context chris-gcp

Setup Traffic

cd traffic
terraform apply -var aws_weight=0 -var gcp_weight=10

Operations

Lets say we want to temporarily remove AWS from DNS. The follow would route all requests into GCP unless it becomes unhealthy. If both AWS and GCP are unhealthy, answers would be sent for both sites evenly.