Reload varnish config

varnish_reload_config.sh

#!/usr/bin/env bash
set -eu
FILE="/etc/varnish/default.vcl"
HOST="localhost"
PORT="6082"
NOW=$(date +%s)
NC="nc ${HOST} ${PORT}"

error() {
    echo 1>&2 "Failed to reload ${FILE}."
    exit 1
}

echo "vcl.load reload${NOW} ${FILE}" | ${NC} || error
echo "vcl.use reload${NOW}" | ${NC} || error
echo "vcl.list" | ${NC} || error