Apache + WSGI Webserver (dynamic content)

Apache processes application requests from Nginx. It also runs the Django Python application in WSGI processes.

Nginx Webserver (static content)

Nginx serves public static content directly to clients. It acts as a reverse proxy to Apache, hosts TLS/SSL for the SDE web application, and exposes ports 80 and 443 to SDE application users.

PostgreSQL Database

This is the database server for the application. It’s accessed by the Apache WSGI processes.

RabbitMQ Message Queue

RabbitMQ is a queuing system for jobs (Issue Tracker, Scanner integration, emails).

Postfix mail server

Postfix handles emails initiated by the SDE application.

Memcached server

Memcached server manages stored data for the SDE application and its services.

Celery workers

Celery runs application jobs (Issue Tracker, Scanner integration, emails).