Install Elasticsearch 7.x on Ubuntu 18.04 (Bionic Beaver)

Elasticsearch is a highly scalable open-source analytics engine and full-text search. With Elasticsearch, you can store, search, and analyze big volumes of data faster and in near real time. Elasticsearch is generally used as the underlying engine/technology that powers applications that have complex search features and requirements. This guide will show you how to install Elasticsearch 7.x on Ubuntu 18.04 LTS (Bionic Beaver) Linux.

For Elasticsearch 6.x, check:

• Install Elasticsearch 6.x on Ubuntu 18.04 LTS (Bionic Beaver)

Here is the guide to install Elasticsearch 7.x on Ubuntu 18.04 LTS.

Step 1: Import Elasticsearch GPG Key

The first step is to import Elasticsearch GPG Key using the command:

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

Step 2: Add Elasticsearch 7.x APT repository

Once the GPG key has been imported, add the apt repository so that you can install Elasticsearch package from:

sudo apt -y install apt-transport-https
echo "deb https://artifacts.elastic.co/packages/oss-7.x/apt stable main" | sudo tee  /etc/apt/sources.list.d/elastic-7.x.list

Step 3: Install OpenJDK

Elasticsearch is dependent on Java, you need to install OpenJDK before you can continue.

sudo apt update
sudo apt -y install default-jdk default-jre

Confirm Java installation by checking the version:

$ java -version
openjdk version "11.0.16" 2022-07-19
OpenJDK Runtime Environment (build 11.0.16+8-post-Ubuntu-0ubuntu118.04)
OpenJDK 64-Bit Server VM (build 11.0.16+8-post-Ubuntu-0ubuntu118.04, mixed mode, sharing)

Step 4: Install Elasticsearch 7.x on Ubuntu 18.04

Now run apt-get update  then install elasticsearch package:

sudo apt update
sudo apt install vim elasticsearch-oss

After the installation, a default configuration file will be populated to /etc/elasticsearch/elasticsearch.ymlMost lines are commented out, edit the file to tweak and tune the configuration.

E.g, you can set correct cluster name for your applications:

$ sudo vim /etc/elasticsearch/elasticsearch.yml
cluster.name: elkcluster

Note that the default minimum memory set for JVM is 2gb, if your server has small memory size, change this value:

sudo vim /etc/elasticsearch/jvm.options

Change:

-Xms2g
-Xmx2g

And set your values for minimum and maximum memory allocation. E.g to set values to 512mb of ram and 1GB, use:

-Xms512m
-Xmx1g

After you have modified the configuration, you can start Elasticsearch:

sudo systemctl daemon-reload
sudo systemctl enable elasticsearch.service
sudo systemctl restart elasticsearch.service

Check status:

$ systemctl status elasticsearch.service 
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2022-10-18 17:29:04 UTC; 16s ago
     Docs: https://www.elastic.co
 Main PID: 5075 (java)
    Tasks: 45 (limit: 2300)
   CGroup: /system.slice/elasticsearch.service
           └─5075 /usr/share/elasticsearch/jdk/bin/java -Xshare:auto -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.ttl=10 -XX:+AlwaysPreTouch -Xss1m -Djava.awt.headless=true -D

Oct 18 17:28:39 server systemd[1]: Starting Elasticsearch...
Oct 18 17:29:04 server systemd[1]: Started Elasticsearch.

That’s all for the installation of Elasticsearch 7.x on Ubuntu 18.04 LTS (Bionic Beaver) Linux.

Learning materials:

• Best Books To Learn Java Programming

For Cluster setup, check out Setup Elasticsearch Cluster on CentOS / Ubuntu With Ansible