Installing and Configuring Elasticsearch on Rocky Linux 9

Installing and configuring Elasticsearch on Rocky Linux 9 involves a few steps. Here’s a guide to help you set it up:

1. Install Java:

Elasticsearch requires Java to run. Install OpenJDK:

sudo dnf install java-11-openjdk-devel

2. Import Elasticsearch GPG Key:

sudo rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch

3. Add Elasticsearch Repository:

Create a new repository file for Elasticsearch:

sudo tee /etc/yum.repos.d/elasticsearch.repo <<EOF [elasticsearch] name=Elasticsearch repository for 7.x packages baseurl=https://artifacts.elastic.co/packages/7.x/yum gpgcheck=1 gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch enabled=1 autorefresh=1 type=rpm-md EOF

4. Install Elasticsearch:

Install Elasticsearch using the following command:

sudo dnf install elasticsearch

5. Configure Elasticsearch:

Open the Elasticsearch configuration file:

sudo nano /etc/elasticsearch/elasticsearch.yml

Adjust the following settings:

• Set network.host to localhost if Elasticsearch will run on the same machine.
• Set discovery.type to single-node.

Save and close the file.

6. Enable and Start Elasticsearch Service:

Enable the Elasticsearch service to start on boot:

sudo systemctl enable elasticsearch

Start the Elasticsearch service:

sudo systemctl start elasticsearch

7. Test Elasticsearch:

Check if Elasticsearch is running:

curl -X GET "localhost:9200/"

You should see a JSON response indicating that Elasticsearch is up and running.

8. Configure Firewall:

If you have a firewall enabled, open the necessary ports:

sudo firewall-cmd --add-port=9200/tcp --permanent sudo firewall-cmd --reload

9. Install Kibana (Optional):

Optionally, you can install Kibana for visualization and exploration:

sudo dnf install kibana

Configure Kibana in the kibana.yml file and start the service:

sudo systemctl enable kibana sudo systemctl start kibana

10. Install Logstash (Optional):

Optionally, you can install Logstash for data processing:

sudo dnf install logstash

Configure Logstash and start the service:

sudo systemctl enable logstash sudo systemctl start logstash

11. Secure Your Elasticsearch Cluster (Optional):

For security, you may want to set up authentication and encryption. Refer to the Elasticsearch documentation for more information on security settings.

That’s it! You’ve installed and configured Elasticsearch on Rocky Linux 9. Adjust the configurations based on your specific needs and security requirements.