#!/usr/bin/env bash
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# Ensure that hostnames resolve correctly.

set -x
set -e

CLOUD_PROVIDER=
while getopts "c:" OPTION; do
  case $OPTION in
  c)
    CLOUD_PROVIDER="$OPTARG"
    shift $((OPTIND-1)); OPTIND=1
    ;;
  esac
done

case $CLOUD_PROVIDER in
  cloudservers)
    if which dpkg &> /dev/null; then
      PRIVATE_IP=`/sbin/ifconfig eth0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'`
      HOSTNAME=`echo $PRIVATE_IP | tr . -`.static.cloud-ips.com
      echo $HOSTNAME > /etc/hostname
      sed -i -e "s/$PRIVATE_IP.*/$PRIVATE_IP $HOSTNAME/" /etc/hosts
      set +e
      /etc/init.d/hostname restart
      set -e
      sleep 2
      hostname
    fi
    ;;
esac