Learn How To Install Elasticsearch on a CentOS 7 Server Instance
Table of Contents
- Prerequisites
- Step 1: Update your system
- Step 2: Install Java
- Step 3: Install Elasticsearch
- Step 4: Test Elasticsearch
Elasticsearch is a popular open source full-text search and analytics engine. Thanks to its versatility, scalability, and ease of use, Elasticsearch is widely used as various applications’ underlying technology to provide complex search features.
In this introductory tutorial, I will explain how to install Elasticsearch on a single CentOS 7 node.
Prerequisites
Before reading further, you should have:
- Deployed An ITWeb.Services CentOS 7 server instance from scratch.
https://www.itweb.services/tutorials/linux-guides/hot-backups-with-percona-xtrabackup-on-the-one-click-wordpress-app”>IT Web Services article.
Step 1: Update your system
Update your system to the latest stable status:
sudo yum update
sudo reboot
After the reboot, still use the same user to log in.
Step 2: Install Java
You need to install Java before you can run Elasticsearch properly. Here, you can install OpenJDK 1.8.0 using the following command:
sudo yum install java-1.8.0-openjdk.x86_64
Then, you can verify your installation with this command:
java -version
Step 3: Install Elasticsearch
Import the Elasticsearch GPG key:
sudo rpm --import https://packages.elastic.co/GPG-KEY-elasticsearch
Create an Elasticsearch repo:
sudo vi /etc/yum.repos.d/elasticsearch.repo
Copy the following code segment into the file:
[elasticsearch-2.x]
name=Elasticsearch repository for 2.x packages
baseurl=https://packages.elastic.co/elasticsearch/2.x/centos
gpgcheck=1
gpgkey=https://packages.elastic.co/GPG-KEY-elasticsearch
enabled=1
Save and quit:
:wq
Install Elasticsearch using YUM:
sudo yum install elasticsearch
Start Elasticsearch and set it to start on system boot:
sudo systemctl start elasticsearch.service
sudo systemctl enable elasticsearch.service
Step 4: Test Elasticsearch
After the installation, you can test Elasticsearch by using the curl command:
curl http://localhost:9200/
Upon success, a JSON document from Elasticsearch will be outputted to your terminal:
{
"name" : "Legion",
"cluster_name" : "elasticsearch",
"version" : {
"number" : "2.3.2",
"build_hash" : "b9e4a6acad4008027e4038f6abed7f7dba346f94",
"build_timestamp" : "2016-04-21T16:03:47Z",
"build_snapshot" : false,
"lucene_version" : "5.5.0"
},
"tagline" : "You Know, for Search"
}
This example uses the default configuration. If you want to deploy Elasticsearch in a production environment, you should use a more customized configuration. You can learn more about configuring Elasticsearch from the official website.
Need help?
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