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      Installation of Elasticsearch 8.x on Ubuntu

      This article provides a comprehensive guide on installing and configuring Elasticsearch on an Ubuntu environment. The instructions cover the installation process, configuration settings, and integration with the OvalEdge (OE) application.

      Elasticsearch Server Installation

      Step#1: Install APT Transport Package

      • Install the APT transport package to enable access to repositories via HTTPS:

      Shell

      $ sudo apt install apt-transport-https

      Sample screenshot


      Step#2: Update Elasticsearch Repository

      • Update the Elasticsearch repository and import the GPG key:

      Shell

      $ wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo gpg --dearmor -o /usr/share/keyrings/elasticsearch-keyring.gpg
      • Use the wget command to pull the Public Key:

      Shell

      $ 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

      Sample screenshot


      Step#3: Install Elasticsearch

      • Install Elasticsearch using APT:

      Shell

      $ sudo apt-get update

      $ sudo apt-get install elasticsearch

      Sample screenshot

      Step#4: Reload and Start Elasticsearch Service

      • Reload the daemon service and enable/start the Elasticsearch service:

      Shell

      $ sudo systemctl daemon-reload

      $ sudo systemctl enable elasticsearch.service

      $ sudo systemctl start elasticsearch.service

      Sample screenshot


      Step#5: Check Elasticsearch Status

      • Check the status of Elasticsearch:

      Shell

      $ sudo systemctl status elasticsearch.service

      Sample screenshot


      Configure Elasticsearch

      Step#6: Edit elasticsearch.yml

      • Edit the Elasticsearch configuration file to customize settings:

      Shell

      $ sudo vim /etc/elasticsearch/elasticsearch.yml

      • Add the following lines at the bottom of the file:

      yaml

      cluster.name: ovaledge

      network.host: 0.0.0.0

      transport.host: localhost

      transport.tcp.port: 9300

      http.port: 9200

      Sample screenshot



      Step# 7: Set Up Elastic User Password

      • Navigate to the Elasticsearch bin directory and set up a password for the Elastic user:

      Shell

      $ sudo ./elasticsearch-setup-passwords interactive

      Sample screenshot

      Step#8: Check Elasticsearch Web Response

      • Check the web response of Elasticsearch:

      Shell

      $ curl http://<IP>:9200

      Sample screenshot

      Step#9: Set Up JVM_HEAP

      • Update JVM settings to restrict Elasticsearch memory usage. Copy the jvm.options file to the jvm.options.d folder and set values:

      Shell

      $ cp /etc/elasticsearch/jvm.options /etc/elasticsearch/jvm.options.d/

      $ sudo vim /etc/elasticsearch/jvm.options.d/jvm.options

      • Set the values:

      Shell

      -Xms5g -Xmx5g

      Integrating Elasticsearch with OvalEdge

      Step#10: Edit Oasis Properties

      • Edit the Oasis properties file in the OE application running on the server:

      Shell

      $ sudo vim /path/to/oasis/properties

      • Update Elasticsearch details:

      yaml

      ES hostname: <domain>

      ES password: *******

      Note: The password was set during the Elasticsearch installation.

      Sample screenshot

      Step#11: Restart Tomcat

      • After editing the Elasticsearch details in the Oasis properties, restart Tomcat:

      yaml

      $ sudo systemctl restart tomcat

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