参考：

Download and install the Public Signing Key

1. rpm --import https://packages.elasticsearch.org/GPG-KEY-elasticsearch

Add the following in your /etc/yum.repos.d/ directory in a file named (for example) elasticsearch.repo

1. [elasticsearch-1.4]
2. name=Elasticsearch repository for 1.4.x packages
3. baseurl=http://packages.elasticsearch.org/elasticsearch/1.4/centos
4. gpgcheck=1
5. gpgkey=http://packages.elasticsearch.org/GPG-KEY-elasticsearch
6. enabled=1

And your repository is ready for use. You can install it with :

1. yum install elasticsearch

Configure Elasticsearch to automatically start during bootup. If your distribution is using SysV, then you will need to run :

1. chkconfig --add elasticsearch

Otherwise if your distribution is using systemd :

1. sudo /bin/systemctl daemon-reload
2. sudo /bin/systemctl enable elasticsearch.service

安装脚本：

1. sudo rpm --import https://packages.elasticsearch.org/GPG-KEY-elasticsearch
2. sudo cat >/etc/yum.repos.d/elasticsearch.repo <<EOF
3. [elasticsearch-1.4]
4. name=Elasticsearch repository for 1.4.x packages
5. baseurl=http://packages.elasticsearch.org/elasticsearch/1.4/centos
6. gpgcheck=1
7. gpgkey=http://packages.elasticsearch.org/GPG-KEY-elasticsearch
8. enabled=1
9. EOF
10. yum install elasticsearch