Setting up ElasticSearch on EC2 - with remote connection configuration

Install Java 8
sudo yum install java-1.8.0

Remove
sudo yum remove java-1.7.0-openjdk   

Get ES
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.4.rpm

Use the root user
sudo su

Install ES
sudo rpm --install elasticsearch-6.2.4.rpm     

Run ES on system startup
sudo chkconfig --add elasticsearch   

Go inside the elasticsearch directory
cd /usr/share/elasticsearch/

Install the plugins
sudo bin/elasticsearch-plugin install discovery-ec2    sudo bin/elasticsearch-plugin install repository-s3

Change the jvm heap size
sudo nano /etc/elasticsearch/jvm.options

->

-Xms512m

-Xmx512m

Change the configuration to allow remote access

nano /etc/elasticsearch/elasticsearch.yml

Add this

http.host: 0.0.0.0

Run 

sudo /etc/init.d/elasticsearch restart

or 

sudo service elasticsearch start

Then finally, check

curl localhost:9200/_cluster/health?pretty   

References:

• https://12techllc.com/fullstack-blog/deploy-elasticsearch-on-a-ec2-instance
• https://www.slightedgecoder.com/2018/01/25/elasticsearch-installation-issue-free-tier-t2-micro-aws-ec2-instance/