{"id":14594,"date":"2022-02-01T08:47:55","date_gmt":"2022-02-01T08:47:55","guid":{"rendered":"https:\/\/linuxways.net\/?p=14594"},"modified":"2022-02-01T08:47:55","modified_gmt":"2022-02-01T08:47:55","slug":"how-to-install-elasticsearch-on-almalinux-8","status":"publish","type":"post","link":"https:\/\/linuxways.net\/de\/red-hat\/how-to-install-elasticsearch-on-almalinux-8\/","title":{"rendered":"How to Install ElasticSearch on AlmaLinux 8"},"content":{"rendered":"

A key component of the Elastic Stack groups of software components is Elasticsearch. Developed in Java, Elasticsearch<\/a> is a opensource, fast and scalable , distributed search and analytics engine.. It allows you to store, index, analyze and search massive volumes of data in near real-time speed. You can store and retrieve data in JSON format using REST APIs.<\/p>\n

Over the course of time, Elasticsearch has become a popular search engine in fields such as log analytics, business analytics, security intelligence as well as full-text search.<\/p>\n

Notable bluechip companies that leverage Elasticsearch in their tech stacks include Uber, Udemy, Shopify, Netflix, Facebook and many more.<\/p>\n

In this article, we will go through the installation of ElasticSearch on AlmaLinux 8.<\/p>\n

Step 1 : Install Java<\/strong><\/h2>\n

ElasticSearch was built on Java. You therefore need to install Java on your system. Run:<\/p>\n

$ sudo dnf install java-11-openjdk<\/strong><\/pre>\n
Confirm java is installed successfully with the command:<\/p>\n
$ java \u2014version<\/strong><\/pre>\n
<\/strong><\/p>\n
Step 2: Import Elastic search GPG key<\/strong><\/h2>\n
Next, we need to import the GPG key for the Elasticsearch rpm packages. Execute the command:<\/p>\n
$ sudo rpm --import <\/strong>https:\/\/artifacts.elastic.co\/GPG-KEY-elasticsearch<\/strong><\/a><\/pre>\n
Step 3: Install Elasticsearch on AlmaLinux<\/strong><\/h2>\n
Next, create a file called elasticsearch.repo in the \/etc\/yum.repos.d\/ .<\/p>\n
$ sudo vim \/etc\/yum.repos.d\/elasticsearch.repo<\/strong><\/pre>\n
Paste the lines below to the file:<\/p>\n
[elasticsearch]<\/strong>\r\n\r\nname=Elasticsearch repository for 7.x packages<\/strong>\r\n\r\nbaseurl=https:\/\/artifacts.elastic.co\/packages\/7.x\/yum<\/strong>\r\n\r\ngpgcheck=1<\/strong>\r\n\r\ngpgkey=https:\/\/artifacts.elastic.co\/GPG-KEY-elasticsearch<\/strong>\r\n\r\nenabled=0<\/strong>\r\n\r\nautorefresh=1<\/strong>\r\n\r\ntype=rpm-md<\/strong><\/pre>\n
After that, install elastic search as follows:<\/p>\n
$ sudo dnf install --enablerepo=elasticsearch -y elasticsearch<\/strong><\/pre>\n
<\/strong><\/p>\n
The Elasticsearch service is disabled by default. Run the following systemctl command to start and enable the elastic search service:<\/p>\n
$ sudo systemctl enable elasticsearch.service --now<\/strong><\/pre>\n
<\/strong><\/p>\n
Check the status of the service with the command:<\/p>\n
$ sudo systemctl status elasticsearch<\/strong><\/pre>\n
<\/strong><\/p>\n
Step 4: Configure ElasticSearch<\/strong><\/h2>\n
After a successful installation, edit the Elasticsearch configuration file. The default configuration settings are okay for single operating servers as Elasticsearch runs on localhost only. However, If you want to set up a cluster, you’ll have to change the configuration file to allow remote connections.<\/p>\n
In the example, we have specified the address 0.0.0. 0. This allows Elasticsearch to listen on all interfaces. If you wish to specify a specific IP address, do so in this section.<\/p>\n
$ sudo nano \/etc\/elasticsearch\/elasticsearch.yml<\/strong><\/pre>\n
<\/strong><\/p>\n
For the changes to take effect, run the command:<\/p>\n
$ sudo systemctl restart elasticsearch<\/strong><\/pre>\n
Testing ElasticSearch installation<\/strong><\/h2>\n
To confirm that Elasticsearch is up and running on our system, run the following curl command. Elasticsearch listens on port 9200 by default.<\/p>\n
$ curl -X GET \"localhost:9200\/\"<\/strong><\/pre>\n
<\/strong><\/p>\n
Simple Operations to perform with elastic search<\/strong><\/h2>\n
First, we will add data to ElasticSearch, you can use the curl command together with a POST request as shown below:<\/p>\n
$ curl -H 'Content-Type: application\/json' -X POST 'http:\/\/localhost:9200\/employee\/task\/1' -d '{ \"name\": \"Update Jira\" }'<\/strong><\/pre>\n
You will get the output below:<\/p>\n
<\/p>\n
Next, let\u2019s retrieve that data using a GET request.<\/p>\n
$ curl -X GET '<\/strong>http:\/\/localhost:9200\/employee\/task\/1<\/strong><\/a>'<\/strong><\/pre>\n
<\/strong><\/p>\n
You can retrieve the data in a in human-readable format as follows:<\/p>\n
$ curl -X GET 'http:\/\/localhost:9200\/employee\/task\/1?pretty'<\/strong><\/pre>\n
<\/p>\n
You can now use ElasticSearch to handle large volumes of data.<\/p>","protected":false},"excerpt":{"rendered":"
A key component of the Elastic Stack groups of software components is Elasticsearch. Developed in Java, Elasticsearch is a opensource, fast and scalable , distributed search and analytics…<\/p>","protected":false},"author":1,"featured_media":14665,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[165],"tags":[435,358],"class_list":["post-14594","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-red-hat","tag-almalinux-8","tag-elasticsearch"],"_links":{"self":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts\/14594","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/comments?post=14594"}],"version-history":[{"count":0,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts\/14594\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/media\/14665"}],"wp:attachment":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/media?parent=14594"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/categories?post=14594"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/tags?post=14594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}