Prerequisites and Requirements

Hardware Requirements

• Kernel version: ??
• CPU (support for SS3?)
• Minimum Memory: 8GB

Supported Operating Systems

Linux

• Ubuntu 14.04
• CentOS 6.5

OS X

Not supported

Windows

Not supported

Packages

These instructions are installing the prerequisite packages and configuring for Impala. 

Ubuntu 14.04

# Install Java 7
sudo add-apt-repository ppa:webupd8team/java -y
sudo apt-get update -y
sudo apt-get install oracle-jdk7-installer -y
 
# Install required libraries and packages
sudo apt-get install git build-essential cmake bison flex pkg-config libsasl2-dev autoconf automake libtool maven subversion doxygen libbz2-dev zlib1g-dev python-pip python-setuptools python-dev libssl-dev libboost-all-dev postgresql liblzo2-dev lzop -y
 
# Install Python packages
sudo pip install allpairs pytest pytest-xdist paramiko texttable prettytable sqlparse psutil==0.7.1 pywebhdfs gitpython jenkinsapi boto3

# Configuring Boost
# Newer versions of boost need to be configured to work with Impala. 
# Impala relies on certain boost libraries ending with a "-mt" extension. 
# You need to add symlinks to boost_filesystem, boost_regex, and boost_system.
cd /usr/lib/x86_64-linux-gnu
sudo ln -s libboost_filesystem.so libboost_filesystem-mt.so
sudo ln -s libboost_filesystem.a libboost_filesystem-mt.a
sudo ln -s libboost_system.so libboost_system-mt.so
sudo ln -s libboost_system.a libboost_system-mt.a
sudo ln -s libboost_regex.so libboost_regex-mt.so
sudo ln -s libboost_regex.a libboost_regex-mt.a

CentOs 6.5

[this page has a good guide.](https://www.digitalocean.com/community/tutorials/how-to-install-java-on-centos-and-fedora)

sudo yum groupinstall "Development Tools"
sudo yum -y install git ant libevent-devel automake libtool flex bison gcc-c++ openssl-devel make cmake doxygen.x86_64 glib-devel python-devel bzip2-devel svn libevent-devel krb5-workstation openldap-devel db4-devel python-setuptools python-pip cyrus-sasl* postgresql postgresql-server ant-nodeps lzo-devel lzop
sudo pip-python install allpairs pytest pytest-xdist paramiko texttable prettytable sqlparse psutil==0.7.1 pywebhdfs gitpython jenkinsapi boto3

##### Configuring Boost
Newer versions of boost need to be configured to work with Impala. Impala relies on certain boost libraries ending with a "-mt" extension. You need to add symlinks to boost_filesystem, boost_regex, and boost_system.

On CentOS 6.5

cd /usr/local/lib
sudo ln -s libboost_filesystem.so libboost_filesystem-mt.so
sudo ln -s libboost_filesystem.a libboost_filesystem-mt.a
sudo ln -s libboost_system.so libboost_system-mt.so
sudo ln -s libboost_system.a libboost_system-mt.a
sudo ln -s libboost_regex.so libboost_regex-mt.so
sudo ln -s libboost_regex.a libboost_regex-mt.a

##### Configuring Postgresql
If you are installing Impala on a fresh machine, you'll need to initialize postgres. On CentOs 6.5 this can be done by running

sudo service postgresql initdb

You need to make a configurations change to allow Hbase and the Hive metastore to functions correctly. Edit the following file as root.

On Ubuntu 14.04

/etc/postgresql/*/main/pg_hba.conf

On CentOs 6.5

/var/lib/pgsql/data/pg_hba.conf

In the following lines at the end of the file, change `peer` or `ident` to `trust`.

# Database administrative login by UNIX sockets
local all all ident

# TYPE DATABASE USER CIDR-ADDRESS METHOD

# "local" is for Unix domain socket connections only
local all all ident
# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all ::1/128 md5

To make Postgres aware of these changes, either restart the service or run: pg_ctl reload

##### Creating the Hive metastore user
sudo -u postgres psql postgres

Then, at the `postgres` command prompt:

CREATE ROLE hiveuser LOGIN PASSWORD 'password';
ALTER ROLE hiveuser WITH CREATEDB;

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### Maven 3
wget http://www.interior-dsgn.com/apache/maven/maven-3/3.0.5/binaries/apache-maven-3.0.5-bin.tar.gz
tar xvf apache-maven-3.0.5-bin.tar.gz && sudo mv apache-maven-3.0.5 /usr/local

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### Environment variables

Put these in your `.bashrc` or elsewhere:

On Ubuntu 14.04

export JAVA_HOME=/usr/lib/jvm/java-7-oracle
export IMPALA_HOME=<path to Impala>
export BOOST_LIBRARYDIR=/usr/lib/x86_64-linux-gnu
export LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu
export LC_ALL="en_US.UTF-8"
export M2_HOME=/usr/local/apache-maven-3.0.5
export M2=$M2_HOME/bin
export PATH=$M2:$PATH

On CentOs 6.5

export BOOST_ROOT=/usr/local

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### Add a path for HDFS domain sockets

sudo mkdir /var/lib/hadoop-hdfs/
sudo chown <user> /var/lib/hadoop-hdfs/
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### Start local ssh server

sudo service ssh start

----
### Enable password-less SSH for HBase

ssh-keygen -t dsa
# Do not type in any passkey. Just press enter.
cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

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### Setup NTP for Kudu

On CentOS 7

yum install ntp
systemctl start ntpd
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