init-letsencrypt.sh

#! /bin/bash

set -eo pipefail

BASEDIR=$(readlink -f .)

build_creds() {
  docker build -f Dockerfile.creds -t creds .
}

run_creds() {
  docker run \
    --rm \
    -v $BASEDIR/data:/app/data creds
}

if ! [ -x "$(command -v docker)" ]; then
  echo 'Error: docker is not installed.' >&2
  exit 1
fi

if ! [ -x "$(command -v docker-compose)" ]; then
  echo "Error: docker-compose is not installed." >&2
  exit 1
fi

domains=(*.o.usedevbook.com)
rsa_key_size=4096
data_path="./data/certbot/"
email="vasek@usedevbook.com" # Adding a valid address is strongly recommended
staging=1 # Set to 1 if you're testing your setup to avoid hitting request limits. If you generate 5 certificates, you'll get blocked for 168 hours.

if [ -d "$data_path" ]; then
  read -p "Existing data found for $domains. Continue and replace existing certificate? (y/N) " decision
  if [ "$decision" != "Y" ] && [ "$decision" != "y" ]; then
    exit
  fi
fi

echo "### Getting Cloudflare credentials"
build_creds
run_creds
echo

if [ ! -e "$data_path/conf/options-ssl-nginx.conf" ] || [ ! -e "$data_path/conf/ssl-dhparams.pem" ]; then
  echo "### Downloading recommended TLS parameters ..."
  mkdir -p "$data_path/conf"
  curl -s https://raw.githubusercontent.com/certbot/certbot/master/certbot-nginx/certbot_nginx/_internal/tls_configs/options-ssl-nginx.conf > "$data_path/conf/options-ssl-nginx.conf"
  curl -s https://raw.githubusercontent.com/certbot/certbot/master/certbot/certbot/ssl-dhparams.pem > "$data_path/conf/ssl-dhparams.pem"
  echo
fi

echo "### Creating dummy certificate for $domains ..."
path="/etc/letsencrypt/live/$domains"
mkdir -p "$data_path/conf/live/$domains"
docker-compose run --rm --entrypoint "\
  openssl req -x509 -nodes -newkey rsa:$rsa_key_size -days 1\
    -keyout '$path/privkey.pem' \
    -out '$path/fullchain.pem' \
    -subj '/CN=localhost'" certbot
echo


echo "### Starting nginx ..."
docker-compose up --force-recreate -d nginx
echo

echo "### Deleting dummy certificate for $domains ..."
docker-compose run --rm --entrypoint "\
  rm -Rf /etc/letsencrypt/live/$domains && \
  rm -Rf /etc/letsencrypt/archive/$domains && \
  rm -Rf /etc/letsencrypt/renewal/$domains.conf" certbot
echo


echo "### Requesting Let's Encrypt certificate for $domains ..."
#Join $domains to -d args
domain_args=""
for domain in "${domains[@]}"; do
  domain_args="$domain_args -d $domain"
done

# Select appropriate email arg
case "$email" in
  "") email_arg="--register-unsafely-without-email" ;;
  *) email_arg="--email $email" ;;
esac

# Enable staging mode if needed
if [ $staging != "0" ]; then staging_arg="--staging"; fi

docker-compose run --rm --entrypoint "\
  certbot certonly \
  $staging_arg \
  $email_arg \
  -d $domain \
  --rsa-key-size $rsa_key_size \
  --no-eff-email \
  --agree-tos \
  --force-renewal \
  --dns-cloudflare \
  --dns-cloudflare-credentials /etc/letsencrypt/cloudflare.ini \
  --dns-cloudflare-propagation-seconds 30" certbot
echo

echo "### Reloading nginx ..."
docker-compose exec nginx nginx -s reload