RPM

The RPM Package Manager (RPM) installation provides everything you need to run OpenSearch inside Red Hat or Red Hat-based Linux Distributions.

RPM supports CentOS 7 and 8, and Amazon Linux 2. If you have your own Java installation and set JAVA_HOME in your terminal application, macOS works, as well.

There are two methods for installing OpenSearch on RPM:

Manual method

Download the RPM package directly from the OpenSearch downloads page. The RPM package can be download both as x64 and arm64.
Import the public GPG key. This key verifies that the your OpenSearch instance is signed.
```
sudo rpm --import https://artifacts.opensearch.org/publickeys/opensearch.pgp
```

On your host, use sudo yum install or sudo rpm -ivh to install the package.

x64

sudo yum install opensearch-2.3.0-linux-x64.rpm
sudo yum install opensearch-dashboards-2.3.0-linux-x64.rpm

sudo rpm -ivh opensearch-2.3.0-linux-x64.rpm
sudo rpm -ivh opensearch-dashboards-2.3.0-linux-x64.rpm

arm64

sudo yum install opensearch-2.3.0-linux-x64.rpm
sudo yum install opensearch-dashboards-2.3.0-linux-arm64.rpm

sudo rpm -ivh opensearch-2.3.0-linux-x64.rpm
sudo rpm -ivh opensearch-dashboards-2.3.0-linux-arm64.rpm

Once complete, you can run OpenSearch inside your distribution.

YUM method

YUM, an RPM package management tool, allows you to pull the RPM package from the YUM repository library.

Create a repository file for both OpenSearch and OpenSearch Dashboards:

sudo curl -SL https://artifacts.opensearch.org/releases/bundle/opensearch/2.x/opensearch-2.x.repo -o /etc/yum.repos.d/opensearch-2.x.repo

sudo curl -SL https://artifacts.opensearch.org/releases/bundle/opensearch-dashboards/2.x/opensearch-dashboards-2.x.repo -o /etc/yum.repos.d/opensearch-dashboards-2.x.repo

To verify that the repos appear in your repo list, use sudo yum repolist.

Clean your YUM cache, to ensure a smooth installation:
```
sudo yum clean all
```
With the repository file downloaded, list all available versions of OpenSearch and OpenSearch-Dashboards:
```
sudo yum list opensearch --showduplicates
sudo yum list opensearch-dashboards --showduplicates
```
Choose the version of OpenSearch you want to install:
```
sudo yum install opensearch
sudo yum install opensearch-dashboards
```
Unless otherwise indicated, the highest minor version of OpenSearch installs.

To install a specific version of OpenSearch:
```
sudo yum install 'opensearch-2.3.0'
```
During installation, the installer stops to see if the GPG key matches the OpenSearch project. Verify that the Fingerprint matches the following:
```
Fingerprint: c5b7 4989 65ef d1c2 924b a9d5 39d3 1987 9310 d3fc
```
If correct, enter yes or y. The OpenSearch installation continues.

Once complete, you can run OpenSearch inside your distribution.

Run OpenSearch

Run OpenSearch and OpenSearch Dashboards using systemctl.

sudo systemctl start opensearch.service
sudo systemctl start opensearch-dashboards.service

Send requests to the server to verify that OpenSearch is running:

curl -XGET https://localhost:9200 -u 'admin:admin' --insecure
curl -XGET https://localhost:9200/_cat/plugins?v -u 'admin:admin' --insecure

To stop running OpenSearch, enter:

sudo systemctl stop opensearch.service
sudo systemctl stop opensearch-dashboards.service

(Optional) Set up Performance Analyzer

When enabled, the Performance Analyzer plugin collects data related to the performance of your OpenSearch instance. To start the Performance Analyzer plugin, enter:

sudo systemctl start opensearch-performance-analyzer.service

To stop the Performance Analyzer, enter:

sudo systemctl stop opensearch-performance-analyzer.service

Upgrade RPM

You can upgrade your RPM OpenSearch instance both manually and through YUM.

Manual

Download the new version of OpenSearch you want to use, and then use rpm -Uvh to upgrade.

YUM

To upgrade to the latest version of OpenSearch with YUM, use sudo yum update. You can also upgrade to a specific OpenSearch version by using sudo yum update opensearch-<version-number>.