How to install Elasticsearch in Linux Ubuntu server

I am currently working on three computers and it is real pain to get everything synchronized. Of course I am using git repositories and cloud but I still have to get rid of apache server, databases, etc. So I decided to create Virtual Machine which I save on USB drive and try to do it this way.

The Linux installation with Apache and MySql is not a problem. But I needed to install Elasticsearch ( which runs on Java ) and make it accessible from my computer ( Linux with Elasticsearch is running in VM ).

Installing Java 8

Add Java repository

Download the required files from Oracle :

sudo add-apt-repository -y ppa:webupd8team/java

Update :

sudo apt-get update

Install Java

sudo apt-get install oracle-java8-installer

Check ( verify ) version after installation :

java -version

On the output you should see something like this :

java version "1.8.0_72"
Java(TM) SE Runtime Environment (build 1.8.0_72-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.72-b15, mixed mode)

Installing ElasticSearch

Add elastic repository

wget -qO - https://packages.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -

Create repository list for Elastic

echo "deb http://packages.elastic.co/elasticsearch/1.7/debian stable main" | sudo tee -a /etc/apt/sources.list.d/elasticsearch-1.7.list

Update again :

sudo apt-get update

Install Elastic

sudo apt-get install elasticsearch

Enable Elastic to start automatically

sudo update-rc.d elasticsearch defaults 95 10

Sample output :

Adding system startup for /etc/init.d/elasticsearch …
/etc/rc0.d/K10elasticsearch -> ../init.d/elasticsearch
/etc/rc1.d/K10elasticsearch -> ../init.d/elasticsearch
/etc/rc6.d/K10elasticsearch -> ../init.d/elasticsearch
/etc/rc2.d/S95elasticsearch -> ../init.d/elasticsearch
/etc/rc3.d/S95elasticsearch -> ../init.d/elasticsearch
/etc/rc4.d/S95elasticsearch -> ../init.d/elasticsearch
/etc/rc5.d/S95elasticsearch -> ../init.d/elasticsearch

Configuration

Change network host and allow remote connection

Open Elasticsearch configuration file in your favorite editor, allow and change network.host to localhost. And if you want to connect to Elasticsearch from remote machine you need to enable network.bind_host and set it to 0.

sudo vi /etc/elasticsearch/elasticsearch.yml

Part of my Elasticsearch configuration file :

############################## Network And HTTP ###############################
# Elasticsearch, by default, binds itself to the 0.0.0.0 address, and listens
# on port [9200-9300] for HTTP traffic and on port [9300-9400] for node-to-node
# communication. (the range means that if the port is busy, it will automatically
# try the next port).

# Set the bind address specifically (IPv4 or IPv6):
#
network.bind_host: 0

# Set the address other nodes will use to communicate with this node. If not
# set, it is automatically derived. It must point to an actual IP address.
#
#network.publish_host: 192.168.0.1

# Set both ‘bind_host’ and ‘publish_host’:
#
network.host: localhost

Restart Elasticsearch service

sudo /etc/init.d/elasticsearch restart

Conclusion

Now, you should be able to connect and get data from Elasticsearch. Test it with command :

curl -X GET 'http://localhost:9200'

Response :

{
  "status" : 200,
  "name" : "Diablo",
  "cluster_name" : "elasticsearch",
  "version" : {
    "number" : "1.7.5",
    "build_hash" : "00f95f4ffca6de89d68b7ccaf80d148f1f70e4d4",
    "build_timestamp" : "2016-02-02T09:55:30Z",
    "build_snapshot" : false,
    "lucene_version" : "4.10.4"
  },
  "tagline" : "You Know, for Search"
}