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