#!/bin/sh

HEALTHCHECK_RECORD=healthcheck.unbound
EXPECTED_VALUE=127.0.0.1

RESOLVED_IP=$(nslookup "${HEALTHCHECK_RECORD}" 127.0.0.1 | awk -F':' '/^Address: / { matched = 1 } matched { print $2}' | xargs)
if [ "${RESOLVED_IP}" != "${EXPECTED_VALUE}" ]; then
  echo "[ERR] ${HEALTHCHECK_RECORD} lookup failed"
  exit 1
fi

echo "[OK] ${HEALTHCHECK_RECORD} == ${RESOLVED_IP}"