install.sh

#!/usr/bin/env bash

######################################################################
# url-shortener-redis chart installation and cluster setup
######################################################################

# generate password for redis
kubectl create ns url-shortener
kubectl create secret generic redis-passwd --from-literal=passwd=`openssl rand -hex 60` -n url-shortener

helm repo add danieldidiobalsamo https://danieldidiobalsamo.github.io/helm-charts-repo/
helm repo update

# deploy app

prod=true # false = local image for dev; true = the one pushed on dockerhub; same for charts
chart="danieldidiobalsamo/url-shortener-redis"
version="0.1.1"

if [ "$prod" = false ]
then
  chart="deployment/url-shortener-redis" # local path
  version="latest"
fi

echo -e 'Setup url-shortener redis cluster...\n'
helm install url-shortener-redis $chart \
  --namespace url-shortener \
  --version $version

# ensuring there's at least one follower replica ready
kubectl wait --for=jsonpath='{.status.availableReplicas}'=2 sts/redis-sts -n url-shortener

######################################################################
# url-shortener chart installation and /etc/hosts update
######################################################################
chart="danieldidiobalsamo/url-shortener"
version="0.1.3"

if [ "$prod" = false ]
then
  chart="deployment/url-shortener" # local path
  version="latest"
fi

echo -e 'Setup url-shortener application and wait for pods / ingress...\n'
helm install url-shortener $chart \
  --namespace url-shortener \
  --version $version \
  --set url-shortener-backend.prod=$prod \
  --set url-shortener-frontend.prod=$prod

# helm install --wait doesn't wait for ingress to get an IP
function getIngressIP () {
  ip=`kubectl get ingress --field-selector metadata.name=url-shortener --namespace url-shortener -o custom-columns=:.status.loadBalancer.ingress[0].ip | tr -d '\n'`
  echo $ip
}

ip=$( getIngressIP )
until [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]
do
  ip=$( getIngressIP )
done

# add ingress IP to /etc/hosts
domainName="short.home"

mapping="$ip    $domainName
$ip    $domainName.backend"

text="The following resolution has to be written in /etc/hosts, or manually be configured in your internal DNS :

$mapping


Update /etc/hosts ?
"

if (whiptail --title "url-shortener installation" --yesno "$text" 16 80) then
  echo "need permission to write in /etc/hosts:"
  echo "$mapping" | cat - /etc/hosts > /tmp/hosts_tmp && sudo mv /tmp/hosts_tmp /etc/hosts

  echo -e '================================================================================='
  echo -e 'Application is deployed !'
  echo -e "Open this link : http://$domainName"
  echo -e '================================================================================='
else
  echo -e '================================================================================='
  echo "Please manually configure your internal DNS with the following :"
  echo -e "$mapping\n"
  echo -e "Then Open this link : http://$domainName"
  echo -e '================================================================================='
fi