Kubernetes on Minikube

istio.sh

#!/usr/bin/env bash
##
## download minikube, kubectl, and istio and add istioctl to path
##
## these steps only need performed one time
##
brew install kubernetes-cli
brew cask install minikube

kubectl version
minikube version

## get latest istio and extract it, then add it to the path
mkdir -p $HOME/istio && cd $HOME/istio
curl -L https://git.io/getLatestIstio | sh -

# go to the new istio-x.x.x directory
cd $(ls -d -1 * | head -n 1)

echo "## istioctl" >> ~/.bashrc
echo "export PATH=$PWD/bin:$PATH" >> ~/.bashrc

##
## Repeat the steps below to create and destroy a demo istio setup on minikube
##

##
## setup minikube cluster for istio
##
## https://istio.io/docs/setup/kubernetes/prepare/platform-setup/minikube/
##
minikube config set vm-driver virtualbox
minikube start --memory=8192 --cpus=4 --kubernetes-version=v1.13.0

##
## install istio in cluster
##
## https://istio.io/docs/setup/kubernetes/install/kubernetes/
##

## custom resource definitions
for i in install/kubernetes/helm/istio-init/files/crd*yaml; do kubectl apply -f $i; done

## demo with strict mutual tls
kubectl apply -f install/kubernetes/istio-demo-auth.yaml

## demo with loose mutual tls
## kubectl apply -f install/kubernetes/istio-demo.yaml

## verify services are up
kubectl get svc -n istio-system

## wait for pods to be Complete or Running
kubectl get pod -n istio-system

## new pods automatically get istio sidecards injected
kubectl label namespace default istio-injection=enabled --overwrite

## deploy application
kubectl create -f samples/helloworld/helloworld.yaml

## deploy gateway
kubectl create -f samples/helloworld/helloworld-gateway.yaml

## get ip for cluster and NodePort for istio ingress gateway
export INGRESS_HOST=$(minikube ip)
export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="http2")].nodePort}')

## call multiple times to see load balance between v1 and v2
curl http://$INGRESS_HOST:$INGRESS_PORT/hello
curl http://$INGRESS_HOST:$INGRESS_PORT/hello
curl http://$INGRESS_HOST:$INGRESS_PORT/hello
curl http://$INGRESS_HOST:$INGRESS_PORT/hello

##
## destroy everything
##
minikube stop
minikube delete