Dependencies

Ruby Gems

Initially, the installation of Capistrano is easy, just execute these commands:

sudo gem install capistrano sudo gem install newrelic_rpm

The first line will install Capistrano, the second command installs New Relic support.

Elasticsearch

Follow these steps to install Elasticsearch 1.2 with Java 1.7 on our CentOS 5.9 servers:

Install Java 1.7

cd /opt/
wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/7u60-b19/jdk-7u60-linux-i586.tar.gz"
tar -xzf jdk-7u60-linux-i586.tar.gz
rm jdk-7u60-linux-i586.tar.gz
/usr/sbin/alternatives --install /usr/bin/java java /opt/jdk1.7.0_60/bin/java 2
/usr/sbin/alternatives --config java

Test with** java -version**. All that's left to do is setup the environment variables in /etc/profile.d/police.sh :

export JAVA_HOME=/opt/jdk1.7.0_60
export JRE_HOME=/opt/jdk1.7.0_60/jre
export PATH=$PATH:/opt/jdk1.7.0_60/bin:/opt/jdk1.7.0_60/jre/bin

Install Elasticsearch 1.2

cd /opt/
wget https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.2.1.tar.gz
tar -xzf elasticsearch-1.2.1.tar.gz
rm elasticsearch-1.2.1.tar.gz
mv elasticsearch-1.2.1 elasticsearch

Now install ES as a service:

cd /tmp/ 
curl -L http://github.com/elasticsearch/elasticsearch-servicewrapper/tarball/master | tar -xz
mv elasticsearch-elasticsearch-servicewrapper-4943d5a/service /opt/elasticsearch/bin/
rm -rf /tmp/elasticsearch-elasticsearch-servicewrapper-4943d5a/
/opt/elasticsearch/bin/service/elasticsearch install
/sbin/chkconfig elasticsearch on
/sbin/chkconfig --list | grep elasticsearch # Check if it's registered to start on boot

Make the following changes in /opt/elasticsearch/config/elasticsearch.yml:

cluster.name: elasticsearch-production or elasticsearch-staging
node.name: "police-001"
path.logs: /var/log/elasticsearch/
path.data: /var/data/elasticsearch

Start ES and check if it's running :

/sbin/service elasticsearch restart
tail -f /var/log/elasticsearch/elasticsearch.log # See if the log is receiving input
http_proxy='' curl 'http://127.0.0.1:9200/?pretty' -i # Check if the service is running and ready.

Now apply the *.mapping files in the *<repo>/install/custom/elasticsearch/* folder to set everything up and start indexing!

Useful links:

• http://www.elasticsearch.org/blog/changing-mapping-with-zero-downtime
• http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-aliases.html
• http://www.elasticsearch.org/blog/introducing-snapshot-restore/