Installation of Elasticsearch 7.x on Ubuntu

Introduction

This document provides a comprehensive guide on installing and configuring Elasticsearch on a Ubuntu environment. The instructions cover the installation process, configuration settings, and integration with the OvalEdge (OE) application.

Prerequisites

1. The user must have Admin access to the server
2. Elasticsearch port 9200 should be enabled

Elasticsearch Server Installation

Step#1: Install APT Transport Package

• Install the APT transport package to enable access to repositories via HTTPS:
  
  
  Sample screenshot
  
  
  

Step#2: Update Elasticsearch Repository

• Update the Elasticsearch repository and import the GPG key:
  

Step#3: Install Elasticsearch

• Install Elasticsearch using APT:
  
  
  Sample screenshot
  
  
  

Step#4: Reload and Start Elasticsearch Service

• Reload the daemon service and enable/start the Elasticsearch service.
  
  
  Sample screenshot
  
  
  

Step#5: Check Elasticsearch Status

• Check the status of Elasticsearch.
  
  
  Sample screenshot
  

Configuring Elasticsearch

Step#6: Edit elasticsearch.yaml

• Edit the Elasticsearch configuration file to customize settings.
  
• Add the following lines at the bottom of the file:
  
  
  Sample screenshot
  
  
  

Step#7: Set Up JVM_HEAP

• Uncomment the JVM parameters mentioned in the settings below to restrict Elasticsearch memory usage. Copy the jvm.options file to the jvm.options.d folder and set values:
  
  
  Sample Screenshot
  

• Set the values:
  

Note: Once the above parameters are updated in elasticsearch.yaml file, then restart the Elasticsearch service and follow the below steps:

Step# 8: Set Up Elastic User Password

• Navigate to the Elasticsearch bin directory and set up a password for the Elastic user:
  
  
  After running the command, type 'Y' and enter the password for Elasticsearch. Repeat the same password when prompted multiple times.
  
  Sample screenshot
  
  
  

Step#9: Check Elasticsearch Web Response

• Check the web response of Elasticsearch:
  Sample screenshot
  

Integrating Elasticsearch with OvalEdge

Step#10: Edit Oasis Properties

• Edit the Oasis properties file in the OE application running on the server:
  
• Update Elasticsearch details:
  
  Note: The password was set during the Elasticsearch installation.
  
  Sample screenshot
  
  

Step#11: Restart Tomcat

• After editing the Elasticsearch details in the Oasis properties, restart Tomcat.
  

Upgrade Elasticsearch

Pre-Upgrade Steps

1. Login to the Elasticsearch Server:
   • Access the server with the necessary user permissions.
2. Check the Current Elasticsearch Version:
   • Run the following command to verify the current version of Elasticsearch:
     curl -u <user>:<password> http://localhost:9200
3. Stop the Elasticsearch Service:
   • Use the following command to stop the Elasticsearch service:
     sudo systemctl stop elasticsearch
     

Upgrade Elasticsearch

1. Install the Updated Elasticsearch Package:
   • Run the following command to upgrade Elasticsearch:
     sudo apt install elasticsearch
2. Reload Systemd Daemon:
   • After the upgrade, reload the systemd daemon to ensure the service configurations are updated:
     sudo systemctl daemon-reload
3. Start the Elasticsearch Service:
   • Start the upgraded Elasticsearch service:
     sudo systemctl start elasticsearch

Post-Upgrade Steps

1. Verify the Elasticsearch Version:
   • Confirm that the upgrade was successful by checking the Elasticsearch version:
     curl -u <user>:<password> http://localhost:9200

This guide ensures a smooth upgrade process for Elasticsearch on Linux.

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