docker/hadoop/install.sh

#!/bin/bash
#
# Licensed to the Apache Software Foundation (ASF) under one
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# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
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#   http://www.apache.org/licenses/LICENSE-2.0
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HADOOP_BASENAME="hadoop-${HADOOP_VERSION}"

[ -d "/usr/local/lib/${HADOOP_BASENAME}" ] && exit

APACHE_MIRROR=$(curl -s http://www.apache.org/dyn/closer.cgi | grep -o '<a href=".*"><strong>' | cut -f2 -d '"' | head -n1)
HADOOP_DOWNLOAD_URL="${APACHE_MIRROR}hadoop/common/${HADOOP_BASENAME}/${HADOOP_BASENAME}.tar.gz"
ALT_HADOOP_DOWNLOAD_URL="https://archive.apache.org/dist/hadoop/common/${HADOOP_BASENAME}/${HADOOP_BASENAME}.tar.gz"

pushd /usr/local/lib > /dev/null
(curl -f ${HADOOP_DOWNLOAD_URL} || curl ${ALT_HADOOP_DOWNLOAD_URL}) | tar xz
popd > /dev/null

cat >> ~/.bashrc <<EOF
export USER=`whoami`
export HADOOP_HOME=/usr/local/lib/${HADOOP_BASENAME}
export PATH="\${PATH}:\${HADOOP_HOME}/bin"
export CLASSPATH="\${CLASSPATH}:\${HADOOP_HOME}/etc/hadoop"
EOF