之前写过一些如何安装Cloudera Hadoop的文章，安装hadoop过程中，最开始是手动安装apache版本的hadoop，其次是使用Intel的IDH管理界面安装IDH的hadoop，再然后分别手动和通过cloudera manager安装hadoop，也使用bigtop-util yum方式安装过apache的hadoop。
安装过程中参考了很多网上的文章，解压缩过cloudera的cloudera-manager-installer.bin，发现并修复了IDH shell脚本中关于puppt的自认为是bug的一个bug，最后整理出了一个自动安装hadoop的shell脚本，脚本托管在github上面: hadoop-install。
hadoop安装文章
博客中所有关于安装hadoop的文章列出如下：
hadoop-install
hadoop-install上脚本，all-in-one-install.sh是在一个节点上安装hdfs、hive、yarn、zookeeper和hbase，编写该脚本是为了在本机（fedora19系统）上调试mapreduce、hive和hbase；cluster-install.sh是在多个节点上安装hadoop集群，同样目前完成了hdfs、hive、yarn、zookeeper和hbase的自动安装。
脚本片段
IDH安装脚本中有一些写的比较好的shell代码片段，摘出如下，供大家学习。
检测操作系统版本
( grep -i "CentOS" /etc/issue > /dev/null ) && OS_DISTRIBUTOR=centos
( grep -i "Red[[:blank:]]*Hat[[:blank:]]*Enterprise[[:blank:]]*Linux" /etc/issue > /dev/null ) && OS_DISTRIBUTOR=rhel
( grep -i "Oracle[[:blank:]]*Linux" /etc/issue > /dev/null ) && OS_DISTRIBUTOR=oel
( grep -i "Asianux[[:blank:]]*Server" /etc/issue > /dev/null ) && OS_DISTRIBUTOR=an
( grep -i "SUSE[[:blank:]]*Linux[[:blank:]]*Enterprise[[:blank:]]*Server" /etc/issue > /dev/null ) && OS_DISTRIBUTOR=sles
( grep -i "Fedora" /etc/issue > /dev/null ) && OS_DISTRIBUTOR=fedora
major_revision=`grep -oP '\d+' /etc/issue | sed -n "1,1p"`
minor_revision=`grep -oP '\d+' /etc/issue | sed -n "2,2p"`
OS_RELEASE="$major_revision.$minor_revision"
修改root密码
echo 'redhat'|passwd root --stdin
修改dns
# Set up nameservers.
# http://ithelpblog.com/os/linux/redhat/centos-redhat/howto-fix-couldnt-resolve-host-on-centos-redhat-rhel-fedora/
# http://stackoverflow.com/a/850731/1486325
echo "nameserver 8.8.8.8" | tee -a /etc/resolv.conf
echo "nameserver 8.8.4.4" | tee -a /etc/resolv.conf
修改操作系统时区
cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
修改hosts文件
cat > /etc/hosts <<EOF
127.0.0.1 localhost
192.168.56.121 cdh1
192.168.56.122 cdh2
192.168.56.123 cdh3
EOF
去掉b文件中包括a文件的内容
grep -vf a b >result.log
修改file-max
echo -e "Global file limit ..."
rst=`grep "^fs.file-max" /etc/sysctl.conf`
if [ "x$rst" = "x" ] ; then
echo "fs.file-max = 727680" >> /etc/sysctl.conf || exit $?
else
sed -i "s:^fs.file-max.*:fs.file-max = 727680:g" /etc/sysctl.conf
fi
生成ssh公要
[ ! -d ~/.ssh ] && ( mkdir ~/.ssh ) && ( chmod 600 ~/.ssh )
yes|ssh-keygen -f ~/.ssh/id_rsa -t rsa -N "" && ( chmod 600 ~/.ssh/id_rsa.pub )
ssh设置无密码登陆
set timeout 20
set host [lindex $argv 0]
set password [lindex $argv 1]
set pubkey [exec cat /root/.ssh/id_rsa.pub]
set localsh [exec cat ./config_ssh_local.sh]
#spawn ssh-copy-id -i /root/.ssh/id_rsa.pub root@$host
spawn ssh root@$host "
umask 022
mkdir -p /root/.ssh
echo \'$pubkey\' > /root/.ssh/authorized_keys
echo \'$localsh\' > /root/.ssh/config_ssh_local.sh
cd /root/.ssh/; sh config_ssh_local.sh
"
expect {
timeout exit
yes/no {send "yes\r";exp_continue}
assword {send "$password\r"}
}
expect eof
#interact
配置JAVA_HOME
### JAVA_HOME ###
if [ -f ~/.bashrc ] ; then
sed -i '/^export[[:space:]]\{1,\}JAVA_HOME[[:space:]]\{0,\}=/d' ~/.bashrc
sed -i '/^export[[:space:]]\{1,\}CLASSPATH[[:space:]]\{0,\}=/d' ~/.bashrc
sed -i '/^export[[:space:]]\{1,\}PATH[[:space:]]\{0,\}=/d' ~/.bashrc
fi
echo "" >>~/.bashrc
echo "export JAVA_HOME=/usr/java/latest" >>~/.bashrc
echo "export CLASSPATH=.:\$JAVA_HOME/lib/tools.jar:\$JAVA_HOME/lib/dt.jar">>~/.bashrc
echo "export PATH=\$JAVA_HOME/bin:\$PATH" >> ~/.bashrc
alternatives --install /usr/bin/java java /usr/java/latest 5
alternatives --set java /usr/java/latest
source ~/.bashrc
格式化集群
su -s /bin/bash hdfs -c 'yes Y | hadoop namenode -format >> /tmp/format.log 2>&1'
创建hadoop目录
su -s /bin/bash hdfs -c "hadoop fs -chmod a+rw /"
while read dir user group perm
do
su -s /bin/bash hdfs -c "hadoop fs -mkdir -R $dir && hadoop fs -chmod -R $perm $dir && hadoop fs -chown -R $user:$group $dir"
echo "."
done << EOF
/tmp hdfs hadoop 1777
/tmp/hadoop-yarn mapred mapred 777
/var hdfs hadoop 755
/var/log yarn mapred 1775
/var/log/hadoop-yarn/apps yarn mapred 1777
/hbase hbase hadoop 755
/user hdfs hadoop 777
/user/history mapred hadoop 1777
/user/root root hadoop 777
/user/hive hive hadoop 777
EOF
hive中安装并初始化postgresql
yum install postgresql-server postgresql-jdbc -y >/dev/null
chkconfig postgresql on
rm -rf /var/lib/pgsql/data
rm -rf /var/run/postgresql/.s.PGSQL.5432
service postgresql initdb
sed -i "s/max_connections = 100/max_connections = 600/" /var/lib/pgsql/data/postgresql.conf
sed -i "s/#listen_addresses = 'localhost'/listen_addresses = '*'/" /var/lib/pgsql/data/postgresql.conf
sed -i "s/shared_buffers = 32MB/shared_buffers = 256MB/" /var/lib/pgsql/data/postgresql.conf
sed -i "s/127.0.0.1\/32/0.0.0.0\/0/" /var/lib/pgsql/data/pg_hba.conf
sudo cat /var/lib/pgsql/data/postgresql.conf | grep -e listen -e standard_conforming_strings
rm -rf /usr/lib/hive/lib/postgresql-jdbc.jar
ln -s /usr/share/java/postgresql-jdbc.jar /usr/lib/hive/lib/postgresql-jdbc.jar
su -c "cd ; /usr/bin/pg_ctl start -w -m fast -D /var/lib/pgsql/data" postgres
su -c "cd ; /usr/bin/psql --command \"create user hiveuser with password 'redhat'; \" " postgres
su -c "cd ; /usr/bin/psql --command \"CREATE DATABASE metastore owner=hiveuser;\" " postgres
su -c "cd ; /usr/bin/psql --command \"GRANT ALL privileges ON DATABASE metastore TO hiveuser;\" " postgres
su -c "cd ; /usr/bin/psql -U hiveuser -d metastore -f /usr/lib/hive/scripts/metastore/upgrade/postgres/hive-schema-0.10.0.postgres.sql" postgres
su -c "cd ; /usr/bin/pg_ctl restart -w -m fast -D /var/lib/pgsql/data" postgres
总结
更多脚本，请关注github：hadoop-install，你可以下载、使用并修改其中代码！
