Elasticsearch Upgarde (Ubuntu)

This article provides detailed instructions for upgrading Elasticsearch to the latest stable version on an Ubuntu system using the APT package manager. It ensures a smooth upgrade while preserving the existing configuration and data.

Prerequisites

• User performing the upgrade has sudo (administrative) privileges.

• Elasticsearch is already installed on the system.

• Credentials for the elastic user are available (if security is enabled).

• System has internet connectivity to fetch updated packages from the repository.

Upgrade Steps

• Check the Current Version

  • Run the following command to verify the installed Elasticsearch version:

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    curl -XGET -u elastic:<password> http://localhost:9200

  • Replace <password> with the actual password of the elastic user.

    
• Stop the Elasticsearch Service

  • Prevent data corruption by stopping the service before upgrading:

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    sudo systemctl stop elasticsearch

    
• Upgrade Elasticsearch via APT

  • Update repositories and install the latest version:

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    sudo apt update
    sudo apt install elasticsearch -y

    
  • This fetches the latest version from the configured Elastic APT repository.

• Start the Elasticsearch Service

  • Restart the service after installation:

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    sudo systemctl start elasticsearch

• Verify the Upgrade

  • Confirm the installed version:

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    curl -XGET -u elastic:<password> http://localhost:9200

  • The response should show the upgraded version number.

Post-Upgrade Verification (Optional)

• Check Elasticsearch logs for warnings or errors:

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  sudo journalctl -u elasticsearch

• Confirm the updated version with the API:

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  curl -XGET -u elastic:<password> http://localhost:9200

  

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