Elastic Search 是一个基于Lucene构建的开源，分布式，RESTful搜索引擎。设计用于云计算中，能够达到实时搜索，稳定，可靠，快速，安装使用方便。支持通过HTTP使用JSON进行数据索引。

Install 

cd /opt

curl http://cloud.github.com/downloads/elasticsearch/elasticsearch/elasticsearch-0.18.7.tar.gz | tar zxv 
ln -s elasticsearch-0.18.7/ elasticsearch

curl -k -L http://github.com/elasticsearch/elasticsearch-servicewrapper/tarball/master | tar -xz
mv *servicewrapper*/service elasticsearch/bin/
rm -Rf *servicewrapper*
/opt/elasticsearch/bin/service/elasticsearch install

ln -s `readlink -f elasticsearch/bin/service/elasticsearch` /usr/bin/elasticsearch_ctl

sed -i -e 's|# cluster.name: elasticsearch|cluster.name: graylog2|' /opt/elasticsearch/config/elasticsearch.yml

service iptables stop

/etc/init.d/elasticsearch start