#!/bin/bash
echo "Hadoop setup begins"
tmp_dir=/tmp/hadoop

install-packages openssh-server wget
echo "Creating hadoop user & group"
adduser -G adm,wheel hadoop

echo "Hadoop version $DIB_HADOOP_VERSION will be injected into image. Starting the download"
wget -P $tmp_dir/ "http://archive.apache.org/dist/hadoop/core/hadoop-"$DIB_HADOOP_VERSION"/hadoop-"$DIB_HADOOP_VERSION"-1.x86_64.rpm"
if [ $? -ne 0 ]; then
   echo -e "Could not find Hadoop version $DIB_HADOOP_VERSION.\nAborting"
   exit 1
fi

rpm -ivh --replacefiles $tmp_dir/hadoop-"$DIB_HADOOP_VERSION"-1.x86_64.rpm
chmod 755 /usr/sbin/start-*
chmod 755 /usr/sbin/stop-*
chmod 755 /usr/sbin/slaves.sh
chmod 755 /usr/sbin/update-hadoop-env.sh
rm $tmp_dir/hadoop-"$DIB_HADOOP_VERSION"-1.x86_64.rpm
rm -r $tmp_dir

echo "Pre-configuring Hadoop"
filename=$(find $TARGET_ROOT/usr/java/ -maxdepth 1 -name "jdk*")
echo -e "PATH=\$PATH:/usr/sbin:$filename/bin\nJAVA_HOME=$filename" >> /home/hadoop/.bashrc
echo -e "HADOOP_HOME=/usr/share/hadoop/" >> /home/hadoop/.bashrc
sed -i "s,export JAVA_HOME=.*,export JAVA_HOME=$filename," /etc/hadoop/hadoop-env.sh
log_dir=/mnt/log/hadoop/\$USER/
sed -i "s,export HADOOP_LOG_DIR=.*,export HADOOP_LOG_DIR=$log_dir," /etc/hadoop/hadoop-env.sh
log_dir=/mnt/log/hadoop/hdfs
sed -i "s,export HADOOP_SECURE_DN_LOG_DIR=.*,export HADOOP_SECURE_DN_LOG_DIR=$log_dir," /etc/hadoop/hadoop-env.sh