renew_cert/renew_cert.sh

#!/bin/sh

PATH="$PATH:/sbin"

service=$1
fqdn=$2

die() {
	echo "$@" >&2
	exit 1
}

if [ -z "${service}" ] || [ -z ${fqdn} ]; then
	die "service and fqdn have to be set"
fi

base_dir="/etc/ssl/${service}"

openssl x509 -checkend 2678400 -noout -in $base_dir/${fqdn}.crt
if [ $? = 0 ]; then
        exit 0
else
	mv $base_dir/${fqdn}.crt $base_dir/${fqdn}.crt.bak-$(date +%F)
	mv $base_dir/${fqdn}-chained.crt \
		$base_dir/${fqdn}-chained.crt-$(date +%F)
	certbot certonly \
		--csr $base_dir/${fqdn}.csr \
		--cert-path $base_dir/${fqdn}.crt \
		--chain-path $base_dir/${fqdn}-chained.crt \
		--webroot \
		-w /var/www/le-challenges/ \
		--agree-tos \
		--register-unsafely-without-email || die "Error while signing certificate"
	mv 0000_chain.pem $base_dir/${fqdn}-chained.crt
	rc-service ${service} reload
fi