Elasticsearch 7.17.x on Amazon Linux

This article provides a comprehensive guide for installing Elasticsearch 7.17.x on Ubuntu 22.04 and Amazon Linux. It includes prerequisites, installation steps, configuration instructions, and integration with the OvalEdge application.

Hardware Requirements

Memory: Minimum 4 GB RAM (8 GB recommended)
CPU: Minimum 2 vCPUs
Disk Space: Minimum 10 GB free

Prerequisites

User account with sudo privileges
Stable internet connection
Java 17 installed (Amazon Corretto or OpenJDK). Elasticsearch 7.17.x requires Java 17.

Elasticsearch Installation (Amazon Linux)

Follow the steps below to install and start Elasticsearch 7.x on Amazon Linux.

Install Java 17

Elasticsearch requires Java 17. Use Amazon Corretto 17:
```
sudo yum install java-17-amazon-corretto -y
```
```
java -version
```
If Java is already installed and java -version returns a supported version, skip this step.

Import the GPG Key

Add the Elastic GPG key for the Elasticsearch repository:

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

Create Elasticsearch Repository

Create the elasticsearch.repo file in the /etc/yum.repos.d/ directory on RedHat-based systems.
```
sudo vi /etc/yum.repos.d/elasticsearch.repo
```

Add the following content:

[Elasticsearch-7]
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

Install Elasticsearch

Update packages and install Elasticsearch:

sudo yum update -y
sudo yum install elasticsearch -y

Enable and Start Elasticsearch

Start the Elasticsearch service after installation.
Reload the systemd manager configuration to recognize the new service:
```
sudo systemctl daemon-reload
```

Enable Elasticsearch on boot:

sudo systemctl enable elasticsearch.service

Start and verify status:

sudo systemctl start elasticsearch.service
sudo systemctl status elasticsearch.service

Ensure the status shows active (running) before proceeding.

Configure Elasticsearch

Elasticsearch requires configuration updates to define cluster settings, enable network access, and activate security features.

Edit elasticsearch.yml

Edit the elasticsearch.yml file in the /etc/elasticsearch/ directory to configure Elasticsearch.
```
sudo vim /etc/elasticsearch/elasticsearch.yml
```

Append or modify:

cluster.name: ovaledge
network.host: 0.0.0.0
transport.host: localhost
transport.tcp.port: 9300
http.port: 9200
xpack.security.enabled: true
cluster.name: Logical name for the Elasticsearch cluster.
network.host: Binds the HTTP service to all available network interfaces.
xpack.security.enabled: Enables built-in security features including authentication and TLS.

Restart Elasticsearch

Restart the Elasticsearch Service.

sudo systemctl restart elasticsearch.service

Verify it responds on port 9200
```
curl http://localhost:9200
```

Set Up Password for Elastic User

Elasticsearch includes built-in reserved users that require password configuration. These users are used by various components within the Elastic Stack for authentication and internal communication.

Navigate to the bin directory:
```
cd /usr/share/elasticsearch/bin
```

Run password setup:

sudo ./elasticsearch-setup-passwords interactive

When prompted, type y to continue.
Enter and confirm a secure password for each built-in user (e.g., elastic, kibana, logstash_system).
For simplicity and manageability, the same password can be used for all users, but this is optional.
Record these credentials securely. The elastic user credentials will be required for integrating Elasticsearch with other applications such as OvalEdge.

Integration with OvalEdge

To integrate Elasticsearch with the OvalEdge application, update the relevant configuration in the oasis.properties file located on the OvalEdge application server.

Edit `oasis.properties`

Navigate to extprop directory:

cd /<path_to_ovaledge>/extprop
sudo vi oasis.properties

Configure Elasticsearch Connection Parameters
- If Elasticsearch is on the same VM: es.host=localhost
- If on another VM: Replace <elasticsearch_host> with its IP or hostname
- Add the elasticsearch user password configured during the Elasticsearch setup.

Restart Tomcat

Restart OvalEdge application:
```
sudo systemctl restart tomcat
```
Ensure Elasticsearch is running and accessible before restarting Tomcat.

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Last updated 4 months ago

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