gcplabs

GCP infrastructure experiments using Terraform and Ansible.

Projects

Directory	Description
spot-kind	Single SPOT VM running a 2-node kind (Kubernetes-in-Docker) cluster. Fast to provision (~3 min), cheap to run.
spot-kind-submariner	Three SPOT VMs each running a kind cluster, linked via Submariner for cross-cluster pod networking and service discovery.
min-gke	Minimal cost GKE cluster with preemptible nodes, autoscaling, and Ansible-driven configuration.

Requirements

• Terraform >= 1.0

  brew install terraform

• Google Cloud SDK

  brew install google-cloud-sdk
  gcloud auth application-default login

• Ansible >= 2.10

  pip install ansible

• kubectl

  brew install kubectl

• subctl (spot-kind-submariner only)

  brew install submariner-io/submariner/subctl

• direnv (optional, for automatic KUBECONFIG switching)

  brew install direnv
  direnv allow   # run in each project dir after cloning

GCP Setup

Each project uses a GCP project ID set in variables.tf. Authenticate before running:

gcloud auth application-default login
gcloud config set project <your-project-id>

Enable required APIs:

gcloud services enable compute.googleapis.com container.googleapis.com

SSH Keys

Each project generates its own SSH key pair via make keys. Keys are excluded from git (.gitignore).

Quick Start

cd spot-kind
make create       # provision VM + kind cluster (~3 min)
kubectl get nodes # uses kubeconfig.yaml in the directory
make destroy      # tear down