Facebook Twitter Instagram
    TecAdmin
    • Home
    • FeedBack
    • Submit Article
    • About Us
    Facebook Twitter Instagram
    TecAdmin
    You are at:Home»Linux Tutorials»How To Install Elasticsearch on CentOS/RHEL 8

    How To Install Elasticsearch on CentOS/RHEL 8

    By RahulOctober 21, 20203 Mins Read

    Elasticsearch is flexible and powerful open-source, distributed real-time search and analytics engine. Using a simple set of APIs provides the ability for full-text search. Elastic search is freely available under the Apache 2 license, which provides the most flexibility.

    Advertisement

    Elasticsearch is used to store and search all kinds of documents. It supports full-text search completely based on the documents instead of tables and schema.

    This tutorial will help you to setup Elasticsearch single node cluster on CentOS 8 and RedHat 8 systems.

    Prerequisites

    Java is the primary requirement for installing Elasticsearch on any system. You can check the installed version of Java by executing the following command. If it returns an error, install Java on your system using this tutorial.

    sudo dnf install java-11-openjdk
    

    After installation, check the Java version:

    java -version 
    
    openjdk version "11.0.8" 2020-07-14 LTS
    OpenJDK Runtime Environment 18.9 (build 11.0.8+10-LTS)
    OpenJDK 64-Bit Server VM 18.9 (build 11.0.8+10-LTS, mixed mode, sharing)
    

    Step 1 – Configure Yum Repository

    The first step is to configure Elasticsearch package repository on your system. Run the following command to install GPG key for the Elasticsearch rpm packages.

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

    Next, create a yum repository configuration file for the Elasticsearch. Edit /etc/yum.repos.d/elasticsearch.repo file in your favorite text editor:

    sudo vi /etc/yum.repos.d/elasticsearch.repo
    

    Add below 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
    

    Step 2 – Installing Elasticsearch

    Your system is prepared for the Elasticsearch installation. Run the following commands to update DNF cache and install the Elasticsearch rpm packages on your system.

    sudo dnf update -y
    sudo dnf install elasticsearch -y
    

    Step 3 – Configure Elasticsearch

    After successful installation edit Elasticsearch configuration file “/etc/elasticsearch/elasticsearch.yml” and set the network.host to localhost. You can also change it to the system LAP IP address to make it accessible over the network.

    vim /etc/elasticsearch/elasticsearch.yml
    

    Set the following values to customize your Elasticsearch environment.

      cluster.name: TecAdmin-ES-Cluster
      node.name: node-1
      path.data: /var/lib/elasticsearch
      network.host: 127.0.0.1
    

    Save file and close.

    After making configuration changes, let’s enable the Elasticsearch service and start it.

    sudo systemctl enable elasticsearch
    sudo systemctl start elasticsearch
    

    Your Elasticsearch server is up and running now. To view status of the service, run below command:

    sudo systemctl status elasticsearch
    

    Output:

    ● elasticsearch.service - Elasticsearch
       Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
       Active: active (running) since Wed 2020-10-21 05:28:25 UTC; 12min ago
         Docs: https://www.elastic.co
     Main PID: 99609 (java)
        Tasks: 61 (limit: 75413)
       Memory: 1.2G
       CGroup: /system.slice/elasticsearch.service
               ├─99609 /usr/share/elasticsearch/jdk/bin/java -Xshare:auto -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.ttl=10 -XX:+AlwaysPreTouch -X>
               └─99818 /usr/share/elasticsearch/modules/x-pack-ml/platform/linux-x86_64/bin/controller
    
    Oct 21 05:28:09 centos8 systemd[1]: Starting Elasticsearch...
    Oct 21 05:28:25 centos8 systemd[1]: Started Elasticsearch.
    

    Step 4 – Test Elasticsearch

    The Elasticsearch has been successfully installed and running on your CentOS 8 or RHEL 8 system. Now, you can use it for storing and searching content.

    Run the following command to view the Elasticsearch server configuration and version details:

    curl -X GET "localhost:9200/?pretty"
    

    You will see the results like below:

    {
      "name" : "centos8",
      "cluster_name" : "TecAdmin-ES-Cluster",
      "cluster_uuid" : "a0OZk1c1TEmPTlA24uT4zQ",
      "version" : {
        "number" : "7.9.2",
        "build_flavor" : "default",
        "build_type" : "rpm",
        "build_hash" : "d34da0ea4a966c4e49417f2da2f244e3e97b4e6e",
        "build_date" : "2020-09-23T00:45:33.626720Z",
        "build_snapshot" : false,
        "lucene_version" : "8.6.2",
        "minimum_wire_compatibility_version" : "6.8.0",
        "minimum_index_compatibility_version" : "6.0.0-beta1"
      },
      "tagline" : "You Know, for Search"
    }
    

    Conclusion

    In this tutorial, You have learned to install and configure Elasticsearch on CentOS 8 / RHEL 8 Linux system.

    cluster elasticsearch
    Share. Facebook Twitter Pinterest LinkedIn Tumblr Email WhatsApp

    Related Posts

    Understanding 2>&1 in Bash: A Beginner’s Guide

    How to Choose the Best Shebang (#!) for Your Shell Scripts

    Modulus Operator (%) in Bash

    Using Modulus Operator (%) in Bash

    View 4 Comments

    4 Comments

    1. Ankit Thakur on December 17, 2021 10:24 am

      Excellent Article 🙂

      Thanks very much for precise and simple explanation.

      Reply
    2. Roger D Pack on December 9, 2021 4:30 pm

      Worked CentOS 8 thanks.

      Reply
    3. Prashant on July 30, 2020 4:11 pm

      How much memory need to set on elasticsearch if we have 2core 4gb server?

      Reply
    4. Steve Mushsero on July 27, 2020 11:52 am

      Great article, though note there is no need to install Java – you can see when it’s running that it didn’t use the version you installed: /usr/share/elasticsearch/jdk/bin/java

      Reply

    Leave A Reply Cancel Reply

    Advertisement
    Recent Posts
    • Implementing a Linux Server Security Audit: Best Practices and Tools
    • cp Command in Linux (Copy Files Like a Pro)
    • 15 Practical Examples of dd Command in Linux
    • dd Command in Linux (Syntax, Options and Use Cases)
    • Iptables: Common Firewall Rules and Commands
    Facebook Twitter Instagram Pinterest
    © 2023 Tecadmin.net. All Rights Reserved | Terms  | Privacy Policy

    Type above and press Enter to search. Press Esc to cancel.