virtual-dsm/run/check.sh

#!/usr/bin/env bash
set -u

[ ! -f "/run/qemu.pid" ] && echo "QEMU not running yet.." && exit 0

# Retrieve IP from guest VM for Docker healthcheck
RESPONSE=$(curl -s -m 6 -S http://127.0.0.1:2210/read?command=10 2>&1)

if [[ ! "${RESPONSE}" =~ "\"success\"" ]] ; then
  echo "Failed to connect to guest: $RESPONSE" && exit 1
fi

# Retrieve the HTTP port number

if [[ ! "${RESPONSE}" =~ "\"http_port\"" ]] ; then
  echo "Failed to parse response from guest: $RESPONSE" && exit 1
fi

rest=${RESPONSE#*http_port}
rest=${rest#*:}
rest=${rest%%,*}
PORT=${rest%%\"*}

[ -z "${PORT}" ] && echo "Guest has not set a portnumber yet.." && exit 1

# Retrieve the IP address

if [[ ! "${RESPONSE}" =~ "eth0" ]] ; then
  echo "Failed to parse response from guest: $RESPONSE" && exit 1
fi

rest=${RESPONSE#*eth0}
rest=${rest#*ip}
rest=${rest#*:}
rest=${rest#*\"}
IP=${rest%%\"*}

[ -z "${IP}" ] && echo "Guest has not received an IP yet.." && exit 1

if ! curl -m 3 -ILfSs "http://${IP}:${PORT}/" > /dev/null; then
  echo "Failed to reach ${IP}:${PORT}"
  exit 1
fi

if [[ "$IP" == "20.20"* ]]; then
  echo "Healthcheck OK"
else
  echo "Healthcheck OK ( $IP )"
fi

exit 0