Install Nginx plus on RHEL 7.4+ / CentOS 7.4+ / Oracle Linux 7.4+

What is NGINX Plus?

• NGINX Plus is a software load balancer, web server, and content cache built on top of open source NGINX. 
• NGINX Plus has exclusive enterprise‑grade features beyond what's available in the open-source offering, including session persistence, configuration via API, and active health checks. 
• Use NGINX Plus instead of your hardware load balancer and get the freedom to innovate without being constrained by infrastructure.

Step 1: Open the Nginx Plus URL link: https://cs.nginx.com/repo_setup


Step 2: Choose your OS and distribution (RHEL 7.4+ in my case).

Choose Enterprise version OR you need to choose free trial request for 30 days URL    

 https://www.nginx.com/free-trial-request


step 4: Register and you will receive a trail mail for 30 days, from there need to download nginx-repo.key & nginx-repo.crt files. 

• Reference mail to download "nginx-repo.crt" & "nginx-repo.key" file

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Since this first installation, you will face "No such file or directory this"

Step 1) If you already have old NGINX packages in your system, back up your configs and logs: 

Command: 
sudo cp -a /etc/Nginx /etc/nginx-plus-backup

sudo cp -a /var/log/nginx /var/log/nginx-plus-backup

Step 2) Create the /etc/ssl/nginx/ directory:

Command: 
sudo mkdir -p /etc/ssl/nginx

Step 3) Log in to NGINX Customer Portal and download the following two files.

nginx-repo.key
nginx-repo.crt




Step 4) Copy the above two files to the RHEL/CentOS/Oracle Linux server into "/etc/ssl/nginx/" directory. Use your SCP client or other secure file transfer tools.

Step 5) Install prerequisite packages.

Command:
sudo yum install ca-certificates

this step will install CA-certificates to your local OS server from REDHAT.

Step 6) Add NGINX Plus repository by downloading the file nginx-plus-7.4.repo to "/etc/yum.repos.d"

Download the "nginx-plus-7.4.repo" and copy this file to "/etc/yum.repos.d" location.

Step 7) Install the NGINX Plus package.

Command:
sudo yum install nginx-plus

Step 8) Check the nginx binary version.

Command:
nginx -v

OR

Command:
nginx -V

Step 9) start the Nginx.
Command:
nginx



Step 10) To verify that NGINX is returning requests.

Command:
curl localhost

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• "Nginx" directories and its descriptions.    

Directories	Descriptions.
/etc/nginx/	Config dir.
/etc/nginx/nginx.conf	Master/Global config file.
/usr/share/nginx/html	Document root directory
/etc/nginx/conf.d	Extra configuration files.
/var/log/nginx	log location folder (access.log & error.log).
/usr/sbin/nginx	Main nginx file location.

• "Nginx" useful commands and its descriptions.

Commands	Descriptions.
nginx -s  [signal]	Signal (Where signal may be one of the following).
nginx -s  stop	Fast Shutdown.
nginx -s quit	Graceful shutdown (to stop Nginx processes with waiting for the worker processes to finish serving current requests).
nginx -s reload	Reloading the configuration file (Changes made in the configuration file will not be applied until the command to reload configuration is sent to Nginx or it is restarted).
nginx  -s reopen	Reopening the log files.
nginx   -t	To test the configuration file (nginx.conf).
nginx   -T	To test configuration, dump it and exit.
nginx  -V	Show the version and configure options then exit.
nginx  -v	Show version and exit.
nginx  -h	This is print help.
nginx  -c  filename	Specify which configuration file NGINX should use instead of the default.
nginx  -T | less	To test configuration, dump it &  page wise view.

Nginx-Docs link:
https://drive.google.com/drive/folders/1jg43W_m0D72tKU5yK4nVEqUuLEYy3pP9


Reference links :
https://cs.nginx.com/repo_setup
https://www.nginx.com/products/nginx/#features
https://www.nginx.com/free-trial-request
https://www.nginx.com/blog/performance-tuning-tips-tricks/

Thanks :-)