init-ssl.sh

#!/bin/bash

################################################################################
# MIT License
#
# Copyright (c) 2018 Philipp Schmieder

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
################################################################################

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

# get arguments
domains=()
rsa_key_size=4096
data_path="./data/certbot"
email=""
staging=0   # Set to 1 if you're testing your setup to avoid hitting request limits

while getopts d:e:s flag
do
	case "${flag}" in
        d) domains+=(${OPTARG});;
		e) email=${OPTARG};;
		s) staging=${OPTARG};;
	esac
done

if [ -z "$domains" ]; then echo "-d is required" && exit; fi

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 "$data_path/conf"
    curl -s https://raw.githubusercontent.com/certbot/certbot/master/certbot-nginx/certbot_nginx/_internal/tls_configs/options-ssl-nginx.conf > "$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 --webroot -w /var/www/certbot \
        $staging_arg \
        $email_arg \
        $domain_args \
        --rsa-key-size $rsa_key_size \
        --agree-tos \
        --force-renewal" certbot
echo

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