# 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: ```bash sudo yum install java-17-amazon-corretto -y ```

```bash 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: ```bash 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. ```bash sudo vi /etc/yum.repos.d/elasticsearch.repo ```

* Add the following content: ```ini [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: ```bash 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: ```bash sudo systemctl daemon-reload ``` * Enable Elasticsearch on boot:
```bash sudo systemctl enable elasticsearch.service ```

* Start and verify status:
```bash 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. ```bash 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.
```bash sudo systemctl restart elasticsearch.service ```

* Verify it responds on port `9200` ```bash 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: ```bash cd /usr/share/elasticsearch/bin ``` * Run password setup: ```bash 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: ```bash cd //extprop sudo vi oasis.properties ``` * **Configure Elasticsearch Connection Parameters** * If Elasticsearch is on the same VM: `es.host=localhost` * If on another VM: Replace `` with its IP or hostname * Add the elasticsearch user password configured during the Elasticsearch setup.

#### Restart Tomcat * Restart OvalEdge application: ```bash sudo systemctl restart tomcat ``` * Ensure Elasticsearch is running and accessible before restarting Tomcat. *** Copyright © 2025, OvalEdge LLC, Peachtree Corners, GA, USA.