Script to install docker and create kind cluster

configure-kind-cluster.sh

#!/bin/bash

# The MIT License (MIT)
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# Copyright (c) 2015 Microsoft Azure
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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while getopts c:e: option; do
    case "${option}" in
        c) CONFIG=${OPTARG};;
        e) EXPOSE=${OPTARG};;
    esac
done

echo "Installing Docker prereqs..."

apt-get update -y && apt-get upgrade -y
apt-get install -y apt-transport-https ca-certificates curl gnupg-agent software-properties-common

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

echo "Installing Docker..."
apt-get update -y
apt-get install -y docker-ce docker-ce-cli containerd.io jq

if [ $? == 0 ];
then
    echo "Docker install complete"
else 
    echo "Docker install failed."
    exit 1
fi

echo "Installing kubectl..."
curl -s -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl
chmod +x ./kubectl
mv ./kubectl /bin/kubectl

echo "Getting kind..."
curl -s -Lo ./kind https://github.com/kubernetes-sigs/kind/releases/download/v0.7.0/kind-$(uname)-amd64
chmod +x ./kind
mv ./kind /bin/kind

kindConfig=${CONFIG:-'https://gist.githubusercontent.com/vyta/970caa97401fdc6fb8fdd3b3da6778e9/raw/bd213c9c8036f01cddea2bc256e93462a95dda9f/1-worker.yaml'}
curl -s -Lo ./kind-config $kindConfig

if [[ $EXPOSE -eq "true" ]];
then
    kindConfig='https://gist.githubusercontent.com/vyta/bdc99acec88abdea7d91204622752b70/raw/f1e3612667fb1c82b84430252c38d75688e084fe/2-worker-public.yaml'
    curl -Lo ./kind-config $kindConfig
    PUBLIC_IP=$(curl -s -H Metadata:true "http://169.254.169.254/metadata/instance?api-version=2019-08-15" | jq -r '.network.interface[0].ipv4.ipAddress[0].publicIpAddress')
    sed -i -e 's PUBLIC_IP '${PUBLIC_IP}' g' ./kind-config
fi

echo "Using config at $kindConfig"
kind create cluster --name kind-cluster --config ./kind-config