Elasticsearch 9.x Upgrade (Linux)

This article outlines the steps to upgrade Elasticsearch to version 9 in a Linux environment. The process includes verifying the current installation, removing the existing version, and installing the updated version using automated scripts. Following these steps ensures a consistent and controlled upgrade process.

Prerequisites

• Ensure the Java upgrade process on the Linux machine is completed.

• Confirm access to the server with the required permissions to execute shell scripts.

• Ensure network access to download scripts from the provided URLs.

• Verify that Elasticsearch credentials are available for post-installation validation.

Steps Involved

Verify Existing Elasticsearch Version

• Run the following command to check the currently installed Elasticsearch version:

  curl -XGET -u elastic:0valEdge! http://localhost:9200 

• Review the response to confirm the existing version. Sample Reference Screenshot:

  

Uninstall Existing Elasticsearch

• Download and execute the uninstall script:

  wget https://ovaledge.s3.us-west-1.amazonaws.com/scripts/8x_automation/remove_elasticsearch.sh
  sh remove_elasticsearch.sh

  Sample Reference Screenshot:

  
• Ensure the script completes successfully before proceeding.

Install Elasticsearch Version 9

• Download and execute the installation script:

  wget https://ovaledge.s3.us-west-1.amazonaws.com/scripts/8x_automation/install_es.sh
  sh install_es.sh

  Sample Reference Screenshot:

  
• Wait for the installation process to complete.

Validate Elasticsearch Installation

• Run the following command to verify the upgraded version:

  curl -XGET -u elastic:0valEdge! http://localhost:9200

• Confirm that the response reflects Elasticsearch version 9.

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