How to Install Apache Tomcat with Nginx Reverse Proxy on AlmaLinux 9

Introduction

Apache Tomcat is an open-source Java Servlet Container developed by the Apache Software Foundation. Nginx is a high-performance web server and reverse proxy. This tutorial will guide you through the process of installing Apache Tomcat with Nginx acting as a reverse proxy on AlmaLinux 9.

Prerequisites

Before you begin, ensure you have:

1. An AlmaLinux 9 server
2. Root or sudo access to the server
3. Basic knowledge of Linux command line

Step 1: Install Java Development Kit (JDK)

Apache Tomcat requires Java to be installed on your system. Install OpenJDK 11:

sudo dnf install java-11-openjdk-devel -y

Step 2: Install Apache Tomcat

Install Apache Tomcat using the official package:

sudo dnf install tomcat -y

Step 3: Start Apache Tomcat Service

Start the Apache Tomcat service and enable it to start on boot:

sudo systemctl start tomcat
sudo systemctl enable tomcat

Step 4: Install Nginx

Install Nginx using the official package:

sudo dnf install nginx -y

Step 5: Configure Nginx as Reverse Proxy for Apache Tomcat

Create a new server block configuration file for Nginx:

sudo nano /etc/nginx/conf.d/tomcat.conf

Add the following content:

server {
    listen 80;
    server_name your_domain.com;

    location / {
        proxy_pass http://localhost:8080/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

Test Nginx configuration for syntax errors:

sudo nginx -t

If the test is successful, reload Nginx to apply the changes:

sudo systemctl reload nginx

Step 6: Access Apache Tomcat via Nginx

Open your web browser and navigate to http://your_domain.com. You should see the Apache Tomcat default landing page, indicating that Nginx is successfully acting as a reverse proxy for Apache Tomcat.

Conclusion

Congratulations! You have successfully installed Apache Tomcat with Nginx acting as a reverse proxy on AlmaLinux 9. You can now deploy Java web applications and access them via Nginx.

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