How To Install Elasticsearch on Debian 10

In this tutorial, we will show you how to install Elasticsearch on Debian 10. For those of you who didn’t know, Elasticsearch is a flexible and powerful open-source, distributed real-time search, and analytics engine. It supports RESTful operations and allows you to store, search, and analyze big volumes of data in real-time. Elasticsearch is one of the most popular search engine powering applications that have complex search requirements such as big e-commerce stores and analytic applications.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step-by-step installation of Elasticsearch on a Debian 10 (Buster) server.

Prerequisites

• A server running one of the following operating systems: Debian 10 (Buster).
• It’s recommended that you use a fresh OS install to prevent any potential issues.
• A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install Elasticsearch on Debian 10

Step 1. Before we install any software, it’s important to make sure your system is up to date by running the following apt commands in the terminal:

sudo apt update
sudo apt upgrade

Step 2. Installing Java.

Run commands to install the Java on Debian system:

apt install openjdk-8-jdk-headless
apt install apt-transport-https

Verify the Java installation by printing the Java version:

java -version

Step 3. Installing Elasticsearch on Debian 10.

First, add the Elasticsearch repository:

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

Next, add the Elasticsearch repository to the system by issuing:

echo "deb https://artifacts.elastic.co/packages/6.x/apt stable main" | tee -a /etc/apt/sources.list.d/elastic-6.x.list

Now run apt update then install Elasticsearch package on your Debian system:

sudo apt update
sudo apt install elasticsearch

When the installation process is complete, start, and enable the service using the following commands:

sudo systemctl enable elasticsearch.service
sudo systemctl start elasticsearch.service

Step 4. Configure Elasticsearch.

We have an active installation for Elasticsearch now. To use Elasticsearch effectively, we can some important changes to the configuration. Run the following command to open the ES config file:

sudo nano /etc/elasticsearch/elasticsearch.yml

Change the following values:

network.host: 0.0.0.0
cluster.name: My_Cluster_07
node.name: "My_Node_007"

• network.host – Set the network host to 0.0.0.0 to listen on all interfaces and make it publically available. You can use your LAN address for LAN access only.
• cluster.name – Name of the cluster. For the multi-node cluster, all the nodes must use the same cluster name.
• node.name – Set the unique name of the node to identify in a cluster.

Restart the Elasticsearch service for the changes to take effect:

sudo systemctl restart elasticsearch

Step 5. Test Elasticsearch.

The Elasticsearch service is ready to use. You can test it using curl the command-line utility. Run the simple GET command using curl to verify the setup. You will see the Elasticsearch cluster details with the version on your screen:

curl -X GET "localhost:9200/"

You should see something similar to this:

{
  "name" : "kepoA2Q",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "B-5B34MeilanaMariaeIYwSgD3ww",
  "version" : {
    "number" : "6.6.1",
    "build_flavor" : "default",
    "build_type" : "deb",
    "build_hash" : "1fd8f69",
    "build_date" : "2019-12-05T17:22:36.160291Z",
    "build_snapshot" : false,
    "lucene_version" : "7.8.0",
    "minimum_wire_compatibility_version" : "5.8.0",
    "minimum_index_compatibility_version" : "5.8.0"
  },
  "tagline" : "You Know, for Search"
}

Congratulations! You have successfully installed Elasticsearch. Thanks for using this tutorial for installing Elasticsearch on Debian 10 (Buster) system. For additional help or useful information, we recommend you to check the official Elasticsearch website.