GlassFish is an open-source application server that implements the Jakarta EE (formerly Java EE) specifications. In this guide, we will walk through the steps to install GlassFish on Debian 11 and configure Nginx as a reverse proxy.

Step 1: Update Your System

Start by ensuring your system is up to date:

sudo apt update && sudo apt upgrade -y

Step 2: Install Java

GlassFish requires Java to run. Install OpenJDK with the following command:

sudo apt install -y openjdk-11-jdk

Step 3: Download and Install GlassFish

Download the latest version of GlassFish:

wget https://download.eclipse.org/ee4j/glassfish/glassfish-6.0.0.zip

Extract the downloaded file:

sudo apt install -y unzip
unzip glassfish-6.0.0.zip -d /opt

Step 4: Configure GlassFish

Navigate to the GlassFish installation directory and start the server:

cd /opt/glassfish6/glassfish/bin
sudo ./asadmin start-domain

Step 5: Install Nginx

Install Nginx to use it as a reverse proxy:

sudo apt install -y nginx

Step 6: Configure Nginx as a Reverse Proxy

Edit the Nginx configuration file to set up the reverse proxy:

sudo nano /etc/nginx/sites-available/glassfish

Add the following configuration:

server {
        listen 80;
        server_name your_domain.com;

        location / {
            proxy_pass http://localhost:8080; # GlassFish default port
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
        }
    }

Replace your_domain.com with your actual domain name.

Step 7: Enable the Nginx Configuration

Enable the GlassFish configuration and test Nginx for errors:

sudo ln -s /etc/nginx/sites-available/glassfish /etc/nginx/sites-enabled/
sudo nginx -t

Step 8: Restart Nginx

Restart Nginx to apply the changes:

sudo systemctl restart nginx

Step 9: Access Your GlassFish Application

You can now access your GlassFish application through Nginx by navigating to:

http://your_domain.com

Conclusion

You have successfully installed GlassFish Java Server on Debian 11 and configured Nginx as a reverse proxy. This setup allows you to manage your Java applications efficiently.

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