Testing your K8s apps with KIND

run_test.sh

#!/usr/bin/env bash

NAME="test-cluster"

echo "+++ Cleaning up old test artififacts"
kubectl delete cluster --name  "${NAME}" > /dev/null 2>&1 || true
rm sample-controller > /dev/null 2>&1 || true

echo "+++ Creating test cluster"
kind create cluster --name "${NAME}" --config kind-config.yaml
export KUBECONFIG="$(kind get kubeconfig-path --name "${NAME}")"

echo "+++ Building sample controller"
CGO_ENABLED=0 GOARCH=amd64 GOOS=linux go build -o sample-controller -ldfalgs

echo "+++ Building Docker image"
docker build -t sample-controller:test .

echo "+++ Loading image into kind container"
kind load docker-image --name "${NAME}" sample-controller:test

echo "+++ Deploying sample controller"
kubectl apply -f sample-controller.yaml

echo "+++ Deploying example foo resource"
kubectl apply -f example-foo.yaml

echo "+++ Testing environment is ready"
echo "+++ Run 'export KUBECONFIG=\"$(kind get kubeconfig-path --name "${NAME}")\"' to access the test cluster"

ref https://www.youtube.com/watch?v=8KtmevMFfxA&ab_channel=CNCF%5BCloudNativeComputingFoundation%5D