Download adn install the Public Signing Key
rpm --import http://packages.elasticsearch.org/GPG-KEY-elasticsearch
Add the following in your /etc/yum.repos.d/
directory in a file named (for example) elasticsearch.repo
[elasticsearch-1.2]name=Elasticsearch repository for 1.2.x packagesbaseurl=http://packages.elasticsearch.org/elasticsearch/1.2/centosgpgcheck=1gpgkey=http://packages.elasticsearch.org/GPG-KEY-elasticsearchenabled=1
And your repository is ready for use. You can install it with
yum -y install elasticsearch