Installing Elasticsearch on Ubuntu Server

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Installing Elasticsearch on Ubuntu Server

Elasticsearch is a powerful open-source search and analytics engine. This guide will walk you through the process of installing Elasticsearch on an Ubuntu server.

Prerequisites

• []An Ubuntu server (20.04 or later recommended).
  []A user with sudo privileges.
• At least 2GB of RAM for optimal performance.

Step 1: Update Your System
Ensure your system is up to date.

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sudo apt update && sudo apt upgrade -y

Step 2: Install Java
Elasticsearch requires Java. Install the OpenJDK package:

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sudo apt install openjdk-17-jdk -y

Verify the installation:

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java -version

You should see output similar to:

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openjdk version "17.x.x"

Step 3: Add Elasticsearch Repository

1. Download and install the public signing key:

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curl -fsSL https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo gpg --dearmor -o /usr/share/keyrings/elasticsearch-keyring.gpg

2. Add the Elasticsearch repository:

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echo "deb [signed-by=/usr/share/keyrings/elasticsearch-keyring.gpg] https://artifacts.elastic.co/packages/8.x/apt stable main" | sudo tee /etc/apt/sources.list.d/elastic-8.x.list

3. Update the package list:

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sudo apt update

Step 4: Install Elasticsearch
Install Elasticsearch using the apt package manager:

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sudo apt install elasticsearch -y

Step 5: Configure Elasticsearch
Open the configuration file:

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sudo nano /etc/elasticsearch/elasticsearch.yml

Make the following changes:

Set the network host to allow external connections:

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network.host: 0.0.0.0

Set a unique cluster name:

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cluster.name: my-cluster

Save and exit (Ctrl+O, Enter, Ctrl+X).

Step 6: Enable and Start Elasticsearch
Enable Elasticsearch to start on boot:

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sudo systemctl enable elasticsearch

Start Elasticsearch:

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sudo systemctl start elasticsearch

Check the status:

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sudo systemctl status elasticsearch

Step 7: Verify Installation
Test if Elasticsearch is running:

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curl -X GET "http://localhost:9200/"

Expected JSON response:

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{
"name" : "your-server-name",
"cluster_name" : "my-cluster",
"version" : {
"number" : "8.x.x",
...
}
}

Step 8: Secure Elasticsearch
Set up a password for the elastic user:

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sudo /usr/share/elasticsearch/bin/elasticsearch-setup-passwords interactive

Follow the prompts to configure the password.

Optional: Allow Remote Access
To access Elasticsearch from other machines, open port 9200 in the firewall:

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sudo ufw allow 9200

Restart Elasticsearch:

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sudo systemctl restart elasticsearch

Step 9: Install Kibana (Optional)
Kibana is a visualization tool for Elasticsearch. To install it:

1. Install Kibana:

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sudo apt install kibana -y

2. Enable and start Kibana:

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sudo systemctl enable kibana
sudo systemctl start kibana

3. Access Kibana at

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http://your-server-ip:5601

.

Conclusion
Elasticsearch is now successfully installed on your Ubuntu server! Use it to enhance search and analytics on your projects. Don't forget to monitor performance and implement security for production environments.