How to Install Elasticsearch on Rocky Linux 8

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Elasticsearch is an Open source full-text search and analytics engine tool used to store, search, and analyze big volumes of data in near real time.

Installing Java

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As Elasticsearch depends on Java and it has to be installed on system by using following command.

dnf install java-11-openjdk-devel

Verify the Java installation by following command.

java -version

Output:

[root@server ~]# java -version openjdk version "11.0.11" 2021-04-20 LTS OpenJDK Runtime Environment 18.9 (build 11.0.11+9-LTS) OpenJDK 64-Bit Server VM 18.9 (build 11.0.11+9-LTS, mixed mode, sharing) [root@server ~]#

Installing Elasticsearch

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Run the following command to install GPG key for the Elasticsearch rpm packages.

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

Next, create a yum repository file for the Elasticsearch.

nano /etc/yum.repos.d/elasticsearch.repo

Add the following content.

[elasticsearch-7.x] 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

Save and exit,

After the repository is enabled, install the Elasticsearch package by using.

dnf install elasticsearch

Output:

[root@server ~]# dnf install elasticsearch Elasticsearch repository for 7.x packages 24 MB/s | 25 MB 00:01 Last metadata expiration check: 0:00:13 ago on Thu 27 May 2021 05:23:44 PM EDT. Dependencies resolved

Package Architecture Version Repository Size

Installing: elasticsearch x86_64 7.13.0-1 elasticsearch-7.x 312 M

Transaction Summary

Install 1 Package

Total download size: 312 M Installed size: 520 M Is this ok [y/N]: y

Configure Elasticsearch

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After installation is completed, edit Elasticsearch configuration file “/etc/elasticsearch/elasticsearch.yml” and set the network.host to localhost.

vim /etc/elasticsearch/elasticsearch.yml

Add the following content,

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

Save and exit,

Now enable and start the Elasticsearch service.

systemctl enable elasticsearch

systemctl start elasticsearch

Check the status of the service by using following command.

systemctl status elasticsearch

Output:

[root@server ~]# systemctl status elasticsearch ● elasticsearch.service - Elasticsearch Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled) Active: active (running) since Thu 2021-05-27 17:26:14 EDT; 12min ago Docs: https://www.elastic.co Main PID: 82908 (java) Tasks: 55 (limit: 11394) Memory: 1.1G CGroup: /system.slice/elasticsearch.service ├─82908 /usr/share/elasticsearch/jdk/bin/java -Xshare:auto -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.t> └─83105 /usr/share/elasticsearch/modules/x-pack-ml/platform/linux-x86_64/bin/controller

May 27 17:25:24 server systemd[1]: Starting Elasticsearch... May 27 17:26:14 server systemd[1]: Started Elasticsearch.

Testing Elasticsearch

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

curl -X GET "localhost:9200/"

Output:

[root@server ~]# curl -X GET "localhost:9200/" { "name" : "node-1", "cluster_name" : "Crowncloud-cluster", "cluster_uuid" : "G0GdHCQnRqe2ABCp9EMD3Q", "version" : { "number" : "7.13.0", "build_flavor" : "default", "build_type" : "rpm", "build_hash" : "5ca8591c6fcdb1260ce95b08a8e023559635c6f3", "build_date" : "2021-05-19T22:22:26.081971330Z", "build_snapshot" : false, "lucene_version" : "8.8.2", "minimum_wire_compatibility_version" : "6.8.0", "minimum_index_compatibility_version" : "6.0.0-beta1" }, "tagline" : "You Know, for Search" }