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sudo yum update

sudo yum install java

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

sudo nano /etc/yum.repos.d/elasticsearch.repo
	[elasticsearch-1.7]
	name=Elasticsearch repository for 1.7.x packages
	baseurl=http://packages.elastic.co/elasticsearch/1.7/centos
	gpgcheck=1
	gpgkey=http://packages.elastic.co/GPG-KEY-elasticsearch
	enabled=1

sudo yum -y install elasticsearch

sudo nano /etc/elasticsearch/elasticsearch.yml
	network.host: 0.0.0.0
	http.port: 9200

sudo chkconfig --add elasticsearch

sudo service elasticsearch start
service elasticsearch status

on /etc/init.d/elasticsearch init script comment lines:

#       if [ -n "$MAX_MAP_COUNT" ]; then
#               sysctl -q -w vm.max_map_count=$MAX_MAP_COUNT
#       fi