Create wildcard letsencrypt certificate with rfc2136 - Custom nameservers

certbot-rfc2136.sh

#!/bin/bash

# ------------------------------------------------------
#     Functions - Common
# ------------------------------------------------------

DOMAIN=$1
SUBDOMAIN=$2
# See https://certbot-dns-rfc2136.readthedocs.io/en/stable/ for certbot.ini
COMMAND="certbot certonly --dns-rfc2136 --dns-rfc2136-credentials /root/.secrets/certbot.ini"

# Request a ssl certificate for $DOMAIN
function request_ssl_certificate() {
if [ -z $SUBDOMAIN ]; then
	$COMMAND -d *.${DOMAIN} -d $DOMAIN
	else
	$COMMAND -d *.${DOMAIN} -d $DOMAIN -d *.${SUBDOMAIN}.${DOMAIN}
fi
}

# Checks if $DOMAIN is empty
function check_var_empty() {
    if [ -z $DOMAIN ]; then
	    echo "bash `basename $0` <Domain> <Subdomain (optional)>"
	    exit 0
    fi
}

# ------------------------------------------------------
#     Script - Start
# ------------------------------------------------------

check_var_empty
request_ssl_certificate

# ------------------------------------------------------
#     Script - End
# ------------------------------------------------------

exit 0