Installing a LEMP Stack on RHEL 8

45 minutes
  • 7 Learning Objectives

About this Hands-on Lab

Before anyone can start building a world-changing website or application on LEMP, they have to lay the foundation: the stack. In this Hands-On Lab, we will walk through the installation of the components that make up the LEMP stack on RHEL 8. We will also configure the Linux environment to host the LEMP stack.

When we have completed this lab, we will have a running LEMP stack on RHEL 8. We will also have a better understanding of how a LEMP installation is configured on RHEL 8.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Install NGINX Using the RHEL 8 Repositories

Become the ‘root’ user.

sudo su -

Install the NGINX server.

yum -y install nginx

Enable the NGINX server to start at boot time.

systemctl enable nginx

Validate the NGINX configuration.

nginx -t

Start the NGINX server and check the status.

systemctl start nginx
systemctl status nginx

The service should be ‘enabled’ and ‘running’.

Configure HTTP Access Through the Firewall

Check the firewall configuration:

firewall-cmd --info-zone=public

HTTP traffic is not configured:

services: cockpit dhcpv6-client ssh

Allow HTTP traffic through:

firewall-cmd --zone=public --add-service=http --permanent

Reload the new firewall configuration to pick up the change:

firewall-cmd --reload

Recheck the firewall configuration:

firewall-cmd --info-zone=public

We should see HTTP listed:

services: cockpit dhcpv6-client http ssh

Verify Basic HTTP Functionality in NGINX

Let’s verify that we can load the default NGINX web page using curl:

curl http://`curl v4.ifconfig.co`

Now we’ll use a web browser to go to the default NGINX web page at http://OUR_PUBLIC_IP_ADDRESS. We should see the default NGINX page. We can find the public IP address of the instance in the /home/cloud_user/server_info.txt file.

Install the PHP Components

Install the PHP components using YUM:

yum -y install php php-pdo php-mysqlnd php-gd php-mbstring php-fpm

We may notice that php and php-fpm are already installed. This is not an error, as php and php-fpm were installed during the creation of the lab environment.

Verifying PHP Functionality in NGINX

Load the ‘phpinfo‘ page using ‘curl‘. Notice that we are specifying a header (using the -H option).

curl -H "www.bigstatecollege.edu" http://www.bigstatecollege.edu/phpinfo.php

We should see the ‘phpinfo‘ page for this server. If you put your server’s public IP address into your /etc/hosts file pointing to www.bigstatecollege.edu you should be able to access the ‘phpinfo’ page at http://www.bigstatecollege.edu/phpinfo.php using your web browser.

Install MariaDB

Install MariaDB using yum:

yum -y install mariadb mariadb-server

Enable and start MariaDB via systemctl:

systemctl enable mariadb
systemctl start mariadb

Verify that MariaDB is installed, enabled, and running using systemctl:

systemctl status mariadb
Verify the Installed Version of MariaDB

Verify the installed version of MariaDB using ‘mysql’.

mysql -V

The exact version is not critical here, but we want to confirm it returns a result.

[root@ip-10-0-1-205 ~]# mysql -V
mysql Ver 15.1 Distrib 10.3.11-MariaDB, for Linux (x86_64) using readline 5.1

Additional Resources

Big State College (BSC) is a Large Ten Conference school in a Midwestern state. BSC is looking to deploy a centralized web hosting service using the LEMP stack.

As the engineers tasked with executing this project, we will be deploying a LEMP stack on a single RHEL 8 server so we have an environment for testing LEMP concepts before deploying the new environment. Let's begin!

Connecting to the Lab Server

Use the credentials provided on the hands-on lab overview page, and log in using an SSH connection to the Public IP or DNS of the server as cloud_user.

Making a SSH connection using the ssh command. Replace <<public_IP_or_DNS>> with the Public IP or DNS provided on the overview page.

ssh cloud_user@<<public_IP_or_DNS>>

If you can't use ssh or prefer a GUI client, use the credentials provided on the hands-on lab overview page to configure your SSH connection to the lab server.

Lab Git Repository

Feel free to explore the configurations and code from the lab at: GitHub - linuxacademy/content-lemp-deep-dive

What are Hands-on Labs

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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