init-letsencrypt.sh

#!/bin/bash
#
# This script is a slightly modified version of one published by "Philipp"
# on the web site: https://medium.com/@pentacent/nginx-and-lets-encrypt-with-docker-in-less-than-5-minutes-b4b8a60d3a71
#
# This version assumes that the certbot data is under the ./certbot subdirectory and that
# the domain name is extracted from the user customized .env (dot-env) environmental variables file
#
# Note that this script runs a simplified Docker Compose configured by 'nginx-init-docker-compose.yml'.
#
hostname=$(egrep -v '^#' .env | grep DC_SITE_BASE_HOSTNAME | xargs -0)
hostname=${hostname#*=}
domains=(${hostname})
rsa_key_size=4096
data_path="./certbot"

# Adding a valid address is strongly recommended
email=$(egrep -v '^#' .env | grep DC_ADMIN_EMAIL | xargs -0)
email=${email#*=}

staging=0 # Set to 1 if you're testing your setup to avoid hitting request limits

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


if [ ! -e "$data_path/conf/options-ssl-nginx.conf" ] || [ ! -e "$data_path/conf/ssl-dhparams.pem" ]; then
  echo "### Downloading recommended TLS parameters ..."
  mkdir -p "$data_path/conf"
  curl -s https://raw.githubusercontent.com/certbot/certbot/master/certbot-nginx/certbot_nginx/options-ssl-nginx.conf > "$data_path/conf/options-ssl-nginx.conf"
  curl -s https://raw.githubusercontent.com/certbot/certbot/master/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 -f nginx-init-docker-compose.yml run --rm --entrypoint "\
  openssl req -x509 -nodes -newkey rsa:1024 -days 1\
    -keyout '$path/privkey.pem' \
    -out '$path/fullchain.pem' \
    -subj '/CN=localhost'" certbot
echo

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

echo "### Deleting dummy certificate for $domains ..."
docker-compose -f nginx-init-docker-compose.yml run --rm --entrypoint "\
  rm -Rf /etc/letsencrypt/live/$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 -f nginx-init-docker-compose.yml run --rm --entrypoint "\
  certbot certonly --webroot -w /var/www/certbot \
    $staging_arg \
    $email_arg \
    $domain_args \
    --rsa-key-size $rsa_key_size \
    --agree-tos \
    --force-renewal" certbot
echo

echo "### Stopping nginx for now..."
docker-compose -f nginx-init-docker-compose.yml down

echo "### You should now manually edit the final ./nginx/default.conf file to your needs"