Site icon CentLinux

How to install Elasticsearch on Rocky Linux 9

Alaric Bird
Share on Social Media

Unleash the power of search by learning how to install Elasticsearch on Rocky Linux 9! This step-by-step guide walks you through the installation process, empowering you to set up your own search engine for data analysis. #centlinux #linux #elasticsearch

What is Elasticsearch?:

Elasticsearch is an open-source, distributed search and analytics engine built on top of Apache Lucene. It’s designed to handle large volumes of data and provide lightning-fast search capabilities along with advanced data analysis and visualization features. Elasticsearch is often used for various purposes, including full-text search, log and event data analysis, monitoring, and business intelligence.

Key Features of Elasticsearch:

Due to its capabilities and versatility, Elasticsearch is used by a wide range of organizations to build applications that require powerful search and analytics functionality. It’s used in domains such as e-commerce, content management, security information and event management (SIEM), monitoring, and more.

Opensearch vs Elasticsearch

OpenSearch and Elasticsearch are both powerful search engines, but they have some key differences to consider:

Origin:

Codebase:

Features:

Security:

Community & Support:

Cost:

Choosing between them:

Ultimately, the best choice depends on your specific needs, budget, and familiarity with open-source vs. commercial software models.

Read Also: How to install OpenSearch on Rocky Linux 9

Environment Specification:

We are using a minimal installed Rocky Linux 9 virtual machine with following specifications.

Prepare your Linux Server:

By using ssh command login to your Rocky Linux server as root user.

Set a static IP address for your Linux machine.

# nmcli c m enp0s3 ipv4.method manual ipv4.addresses 192.168.18.84/24 ipv4.gateway 192.168.18.1 ipv4.dns 192.168.18.1
# nmcli c down enp0s3 ; nmcli c up enp0s3

Set a hostname for the Elasticsearch server.

# hostnamectl set-hostname elastic-01.centlinux.com
# echo "192.168.18.84 elastic-01 elastic-01.centlinux.com" >> /etc/hosts

Update software packages in your Linux OS.

# dnf update -y

If the above command updates your Linux Kernel, then you should reboot your Linux OS before moving forward with this tutorial.

# reboot

Note down the Linux OS and Linux Kernel versions of the machine, that are being used in this tutorial.

# cat /etc/rocky-release
Rocky Linux release 9.2 (Blue Onyx)

# uname -r
5.14.0-284.25.1.el9_2.x86_64

Install Elasticsearch Yum Repository:

Create a yum repository configuration file with the help of vim text editor.

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

Add following lines in this file to define Elasticsearch yum repository.

[elasticsearch]
name=Elasticsearch repository for 8.x packages
baseurl=https://artifacts.elastic.co/packages/8.x/yum
gpgcheck=0
enabled=0
autorefresh=1
type=rpm-md

Build yum cache for newly installed yum repositories.

# dnf makecache
Elasticsearch repository for 8.x packages       1.0 MB/s |  31 MB     00:30
Rocky Linux 9 - BaseOS                          1.0 kB/s | 4.1 kB     00:03
Rocky Linux 9 - AppStream                       2.5 kB/s | 4.5 kB     00:01
Rocky Linux 9 - Extras                          1.1 kB/s | 2.9 kB     00:02
Metadata cache created.

Elasticsearch official yum repository has been installed. Now you can easily install Elasticsearch on Rocky Linux by executing dnf command.

Elasticsearch Installation on Rocky Linux:

Elasticsearch yum repository is not enabled by default. We did this to avoid the automatic update of Elasticsearch software.

Execute following command to enable Elasticsearch yum repositories and install open-source analytics software.

# dnf install --enablerepo=elasticsearch -y elasticsearch
Last metadata expiration check: 0:06:57 ago on Wed 09 Aug 2023 09:00:05 PM PKT.
Dependencies resolved.
================================================================================
 Package              Architecture  Version          Repository            Size
================================================================================
Installing:
 elasticsearch        x86_64        8.9.0-1          elasticsearch        578 M

Transaction Summary
================================================================================
Install  1 Package

Total download size: 578 M
Installed size: 1.2 G
Downloading Packages:
elasticsearch-8.9.0-x86_64.rpm                  858 kB/s | 578 MB     11:30
--------------------------------------------------------------------------------
Total                                           858 kB/s | 578 MB     11:30
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                        1/1
  Running scriptlet: elasticsearch-8.9.0-1.x86_64                           1/1
Creating elasticsearch group... OK
Creating elasticsearch user... OK

  Installing       : elasticsearch-8.9.0-1.x86_64                           1/1
  Running scriptlet: elasticsearch-8.9.0-1.x86_64                           1/1
--------------------------- Security autoconfiguration information ------------------------------

Authentication and authorization are enabled.
TLS for the transport and HTTP layers is enabled and configured.

The generated password for the elastic built-in superuser is : lp7rCo7ODq=yPdjj712a

If this node should join an existing cluster, you can reconfigure this with
'/usr/share/elasticsearch/bin/elasticsearch-reconfigure-node --enrollment-token <token-here>'
after creating an enrollment token on your existing cluster.

You can complete the following actions at any time:

Reset the password of the elastic built-in superuser with
'/usr/share/elasticsearch/bin/elasticsearch-reset-password -u elastic'.

Generate an enrollment token for Kibana instances with
 '/usr/share/elasticsearch/bin/elasticsearch-create-enrollment-token -s kibana'.

Generate an enrollment token for Elasticsearch nodes with
'/usr/share/elasticsearch/bin/elasticsearch-create-enrollment-token -s node'.

-------------------------------------------------------------------------------------------------
### NOT starting on installation, please execute the following statements to configure elasticsearch service to start automatically using systemd
 sudo systemctl daemon-reload
 sudo systemctl enable elasticsearch.service
### You can start elasticsearch service by executing
 sudo systemctl start elasticsearch.service

/usr/lib/tmpfiles.d/elasticsearch.conf:1: Line references path below legacy directory /var/run/, updating /var/run/elasticsearch → /run/elasticsearch; please update the tmpfiles.d/ drop-in file accordingly.

  Verifying        : elasticsearch-8.9.0-1.x86_64                           1/1

Installed:
  elasticsearch-8.9.0-1.x86_64

Complete!

Note down the password of Elasticsearch superuser.

Enable and start Elasticsearch service.

# systemctl enable --now elasticsearch.service
Created symlink /etc/systemd/system/multi-user.target.wants/elasticsearch.service → /usr/lib/systemd/system/elasticsearch.service.

Reset the password of Elasticsearch superuser.

# /usr/share/elasticsearch/bin/elasticsearch-reset-password -u elastic
This tool will reset the password of the [elastic] user to an autogenerated value.
The password will be printed in the console.
Please confirm that you would like to continue [y/N]y


Password for the [elastic] user successfully reset.
New value: 1SbPS44BMmhb+yaw1gCl

Configure Linux Firewall:

Elasticsearch service runs on default port 9200/tcp. So, you must allow this service port in Linux firewall to make your Elasticsearch server accessible from the network.

# firewall-cmd --permanent --add-port=9200/tcp
success

# firewall-cmd --reload
success

Testing Elasticsearch Server:

Query the Elasticsearch server by using following command syntax

# curl -X GET "https://elastic-01.centlinux.com:9200/_cluster/health?wait_for_status=yellow&timeout=50s&pretty" --key certificates/elasticsearch-ca.pem  -k -u elastic
Enter host password for user 'elastic':
{
  "cluster_name" : "elasticsearch",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 1,
  "number_of_data_nodes" : 1,
  "active_primary_shards" : 1,
  "active_shards" : 1,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0
}

Your Elasticsearch server has been installed successfully.

Video Tutorial: How to install Elasticsearch on Linux

Conclusion:

In this Linux tutorial, you have learned how to install Elasticsearch on Rocky Linux 9. To build a strong foundation in Data Analytics, we recommend that you should attend online training ElasticSearch, LogStash, Kibana ELK #1 – Learn ElasticSearch

Exit mobile version